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de Lima AFV, Lourenço ADA, Silva VD, Menezes de Oliveira AL, Rostas AM, Barbu-Tudoran L, Leostean C, Pana O, da Silva RB, Macedo DA, da Silva FF. Co 3O 4/activated carbon nanocomposites as electrocatalysts for the oxygen evolution reaction. Dalton Trans 2024; 53:8563-8575. [PMID: 38682235 DOI: 10.1039/d3dt03720g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The Oxygen Evolution Reaction (OER) is crucial in various processes such as hydrogen production via water splitting. Several electrocatalysts, including metal oxides, have been evaluated to enhance the reaction efficiency. Zeolitic Imidazolate Framework-67 (ZIF-67) has been employed as a precursor to produce Co3O4, showing high OER activity. Additionally, the formation of composites with carbon-based materials improves the activity of these materials. Thus, this work focuses on synthesizing ZIF-67 and commercial activated carbon (AC) composites, which were used as precursors to obtain Co3O4/C electrocatalysts by calculating ZIF-67/CX (X = 10, 30, and 50, the mass percentage of AC). The obtained materials were thoroughly characterized by employing X-ray powder diffraction (XRD), confirming the cobalt oxide structure with a sphere-like morphology as observed in the TEM images. The presence of oxygen vacancies was confirmed by infrared spectroscopy and EPR measurements. The electrocatalytic performance in the OER was investigated by linear sweep voltammetry (LSV), which revealed an overpotential of 325 mV at 10 mA cm-2 and a Tafel slope value of 65.32 mV dec-1 for Co3O4/C10, superior in activity to several previously reported studies in the literature and electrochemical stability of up to 8 hours. The reduced value of charge transfer resistance, high double-layer capacitance, and the presence of Co3+ ions justify the superior performance of the Co3O4/C10 electrocatalyst.
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Affiliation(s)
- Andrei F V de Lima
- Departamento de Química, Universidade Federal da Paraíba, 58051-900, João Pessoa-PB, Brazil.
| | - Annaíres de A Lourenço
- Departamento de Química, Universidade Federal da Paraíba, 58051-900, João Pessoa-PB, Brazil.
| | - Vinícius D Silva
- Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPCEM, Universidade Federal da Paraíba, 58051-900, João Pessoa-PB, Brazil
| | - André L Menezes de Oliveira
- Núcleo de Pesquisa e Extensão LACOM, Departamento de Química, Universidade Federal da Paraíba, 52051-85, João Pessoa-PB, Brazil
| | - Arpad M Rostas
- Department of Physics of Nanostructure Systems, National Institute for Research and Development of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania
| | - Lucian Barbu-Tudoran
- Department of Physics of Nanostructure Systems, National Institute for Research and Development of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania
| | - Cristian Leostean
- Department of Physics of Nanostructure Systems, National Institute for Research and Development of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania
| | - Ovidiu Pana
- Department of Physics of Nanostructure Systems, National Institute for Research and Development of Isotopic and Molecular Technologies, 400293 Cluj-Napoca, Romania
| | - Rodolfo B da Silva
- Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPCEM, Universidade Federal da Paraíba, 58051-900, João Pessoa-PB, Brazil
| | - Daniel A Macedo
- Programa de Pós-Graduação em Ciência e Engenharia de Materiais - PPCEM, Universidade Federal da Paraíba, 58051-900, João Pessoa-PB, Brazil
| | - Fausthon F da Silva
- Departamento de Química, Universidade Federal da Paraíba, 58051-900, João Pessoa-PB, Brazil.
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2
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Quan L, Jiang H, Mei G, Sun Y, You B. Bifunctional Electrocatalysts for Overall and Hybrid Water Splitting. Chem Rev 2024; 124:3694-3812. [PMID: 38517093 DOI: 10.1021/acs.chemrev.3c00332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Electrocatalytic water splitting driven by renewable electricity has been recognized as a promising approach for green hydrogen production. Different from conventional strategies in developing electrocatalysts for the two half-reactions of water splitting (e.g., the hydrogen and oxygen evolution reactions, HER and OER) separately, there has been a growing interest in designing and developing bifunctional electrocatalysts, which are able to catalyze both the HER and OER. In addition, considering the high overpotentials required for OER while limited value of the produced oxygen, there is another rapidly growing interest in exploring alternative oxidation reactions to replace OER for hybrid water splitting toward energy-efficient hydrogen generation. This Review begins with an introduction on the fundamental aspects of water splitting, followed by a thorough discussion on various physicochemical characterization techniques that are frequently employed in probing the active sites, with an emphasis on the reconstruction of bifunctional electrocatalysts during redox electrolysis. The design, synthesis, and performance of diverse bifunctional electrocatalysts based on noble metals, nonprecious metals, and metal-free nanocarbons, for overall water splitting in acidic and alkaline electrolytes, are thoroughly summarized and compared. Next, their application toward hybrid water splitting is also presented, wherein the alternative anodic reactions include sacrificing agents oxidation, pollutants oxidative degradation, and organics oxidative upgrading. Finally, a concise statement on the current challenges and future opportunities of bifunctional electrocatalysts for both overall and hybrid water splitting is presented in the hope of guiding future endeavors in the quest for energy-efficient and sustainable green hydrogen production.
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Affiliation(s)
- Li Quan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Hui Jiang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Guoliang Mei
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yujie Sun
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Bo You
- Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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3
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Paparoni F, Alizon G, Zitolo A, Rezvani SJ, Di Cicco A, Magnan H, Fonda E. A novel electrochemical flow-cell for operando XAS investigations in X-ray opaque supports. Phys Chem Chem Phys 2024; 26:3897-3906. [PMID: 38230576 DOI: 10.1039/d3cp04701f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
Improvement of electrochemical technologies is one of the most popular topics in the field of renewable energy. However, this process requires a deep understanding of the electrode-electrolyte interface behavior under operando conditions. X-ray absorption spectroscopy (XAS) is widely employed to characterize electrode materials, providing element-selective oxidation state and local structure. Several existing cells allow studies as close as possible to realistic operating conditions, but most of them rely on the deposition of the electrodes on conductive and X-ray transparent materials, from where the radiation impinges the sample. In this work, we present a new electrochemical flow-cell for operando XAS that can be used with X-ray opaque substrates, since the signal is effectively detected from the electrode surface, as the radiation passes through a thin layer of electrolyte (∼17 μm). The electrolyte can flow over the electrode, reducing bubble formation and avoiding strong reactant concentration gradients. We show that high-quality data can be obtained under operando conditions, thanks to the high efficiency of the cell from the hard X-ray regime down to ∼4 keV. We report as a case study the operando XAS investigation at the Fe and Ni K-edges on Ni-doped γ-Fe2O3 films, epitaxially grown on Pt substrates. The effect of the Ni content on the catalytic performances for the oxygen evolution reaction is discussed.
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Affiliation(s)
- Francesco Paparoni
- Synchrotron SOLEIL, Départementale 128, 91190 Saint-Aubin, France.
- Sez. Fisica, Scuola di Scienze e Tecnologie, Universitá di Camerino, via Madonna delle Carceri, I-62032 Camerino, Italy
| | - Guillaume Alizon
- Synchrotron SOLEIL, Départementale 128, 91190 Saint-Aubin, France.
| | - Andrea Zitolo
- Synchrotron SOLEIL, Départementale 128, 91190 Saint-Aubin, France.
| | - Seyed Javad Rezvani
- Sez. Fisica, Scuola di Scienze e Tecnologie, Universitá di Camerino, via Madonna delle Carceri, I-62032 Camerino, Italy
- CNR-IOM, SS14 - km 163.5 in Area Science Park, 34149, Trieste, Italy
| | - Andrea Di Cicco
- Sez. Fisica, Scuola di Scienze e Tecnologie, Universitá di Camerino, via Madonna delle Carceri, I-62032 Camerino, Italy
| | - Hélène Magnan
- Université Paris-Saclay, CEA, CNRS, Service de Physique de l'Etat Condensé, F-91191 Gif-sur-Yvette, France
| | - Emiliano Fonda
- Synchrotron SOLEIL, Départementale 128, 91190 Saint-Aubin, France.
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4
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Fusek L, Samal PK, Keresteš J, Khalakhan I, Johánek V, Lykhach Y, Libuda J, Brummel O, Mysliveček J. A model study of ceria-Pt electrocatalysts: stability, redox properties and hydrogen intercalation. Phys Chem Chem Phys 2024; 26:1630-1639. [PMID: 37850575 DOI: 10.1039/d3cp03831a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2023]
Abstract
The electrocatalytic properties of advanced metal-oxide catalysts are often related to a synergistic interplay between multiple active catalyst phases. The structure and chemical nature of these active phases are typically established under reaction conditions, i.e. upon interaction of the catalyst with the electrolyte. Here, we present a fundamental surface science (scanning tunneling microscopy, X-ray photoelectron spectroscopy, and low-energy electron diffraction) and electrochemical (cyclic voltammetry) study of CeO2(111) nanoislands on Pt(111) in blank alkaline electrolyte (0.1 M KOH) in a potential window between -0.05 and 0.9 VRHE. We observe a size- and preparation-dependent behavior. Large ceria nanoislands prepared at high temperatures exhibit stable redox behavior with Ce3+/Ce4+ electrooxidation/reduction limited to the surface only. In contrast, ceria nanoislands, smaller than ∼5 nm prepared at a lower temperature, undergo conversion into a fully hydrated phase with Ce3+/Ce4+ redox transitions, which are extended to the subsurface region. While the formation of adsorbed OH species on Pt depends strongly on the ceria coverage, the formation of adsorbed Hads on Pt is independent of the ceria coverage. We assign this observation to intercalation of Hads at the Pt/ceria interface. The intercalated Hads cannot participate in the hydrogen evolution reaction, resulting in the moderation of this reaction by ceria nanoparticles on Pt.
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Affiliation(s)
- Lukáš Fusek
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 180 00 Praha 8, Czech Republic.
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
| | - Pankaj Kumar Samal
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 180 00 Praha 8, Czech Republic.
| | - Jiří Keresteš
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 180 00 Praha 8, Czech Republic.
| | - Ivan Khalakhan
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 180 00 Praha 8, Czech Republic.
| | - Viktor Johánek
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 180 00 Praha 8, Czech Republic.
| | - Yaroslava Lykhach
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
| | - Jörg Libuda
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
| | - Olaf Brummel
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
| | - Josef Mysliveček
- Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, 180 00 Praha 8, Czech Republic.
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5
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Dey S, Folkestad SD, Paul AC, Koch H, Krylov AI. Core-ionization spectrum of liquid water. Phys Chem Chem Phys 2024; 26:1845-1859. [PMID: 38174659 DOI: 10.1039/d3cp02499g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
We present state-of-the-art calculations of the core-ionization spectrum of water. Despite significant progress in procedures developed to mitigate various experimental complications and uncertainties, the experimental determination of ionization energies of solvated species involves several non-trivial steps such as assessing the effect of the surface potential, electrolytes, and finite escape depths of photoelectrons. This provides a motivation to obtain robust theoretical values of the intrinsic bulk ionization energy and the corresponding solvent-induced shift. Here we develop theoretical protocols based on coupled-cluster theory and electrostatic embedding. Our value of the intrinsic solvent-induced shift of the 1sO ionization energy of water is -1.79 eV. The computed absolute position and the width of the 1sO peak in photoelectron spectrum of water are 538.47 eV and 1.44 eV, respectively, agreeing well with the best experimental values.
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Affiliation(s)
- Sourav Dey
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA.
| | - Sarai Dery Folkestad
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA.
| | - Alexander C Paul
- Department of Chemistry, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Henrik Koch
- Department of Chemistry, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Anna I Krylov
- Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA.
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6
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Qiu C, Odarchenko Y, Meng Q, Dong H, Gonzalez IL, Panchal M, Olalde-Velasco P, Maccherozzi F, Zanetti-Domingues L, Martin-Fernandez ML, Beale AM. Compositional Evolution of Individual CoNPs on Co/TiO 2 during CO and Syngas Treatment Resolved through Soft XAS/X-PEEM. ACS Catal 2023; 13:15956-15966. [PMID: 38125980 PMCID: PMC10729030 DOI: 10.1021/acscatal.3c03214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 12/23/2023]
Abstract
The nanoparticle (NP) redox state is an important parameter in the performance of cobalt-based Fischer-Tropsch synthesis (FTS) catalysts. Here, the compositional evolution of individual CoNPs (6-24 nm) in terms of the oxide vs metallic state was investigated in situ during CO/syngas treatment using spatially resolved X-ray absorption spectroscopy (XAS)/X-ray photoemission electron microscopy (X-PEEM). It was observed that in the presence of CO, smaller CoNPs (i.e., ≤12 nm in size) remained in the metallic state, whereas NPs ≥ 15 nm became partially oxidized, suggesting that the latter were more readily able to dissociate CO. In contrast, in the presence of syngas, the oxide content of NPs ≥ 15 nm reduced, while it increased in quantity in the smaller NPs; this reoxidation that occurs primarily at the surface proved to be temporary, reforming the reduced state during subsequent UHV annealing. O K-edge measurements revealed that a key parameter mitigating the redox behavior of the CoNPs were proximate oxygen vacancies (Ovac). These results demonstrate the differences in the reducibility and the reactivity of Co NP size on a Co/TiO2 catalyst and the effect Ovac have on these properties, therefore yielding a better understanding of the physicochemical properties of this popular choice of FTS catalysts.
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Affiliation(s)
- Chengwu Qiu
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Research
Complex at Harwell (RCaH), Harwell, Didcot, Oxfordshire OX11 0FA, U.K.
| | - Yaroslav Odarchenko
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Research
Complex at Harwell (RCaH), Harwell, Didcot, Oxfordshire OX11 0FA, U.K.
| | - Qingwei Meng
- School
of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006 (China)
| | - Hongyang Dong
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Research
Complex at Harwell (RCaH), Harwell, Didcot, Oxfordshire OX11 0FA, U.K.
| | - Ines Lezcano Gonzalez
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Research
Complex at Harwell (RCaH), Harwell, Didcot, Oxfordshire OX11 0FA, U.K.
| | - Monik Panchal
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Research
Complex at Harwell (RCaH), Harwell, Didcot, Oxfordshire OX11 0FA, U.K.
| | | | | | | | | | - Andrew M. Beale
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Research
Complex at Harwell (RCaH), Harwell, Didcot, Oxfordshire OX11 0FA, U.K.
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7
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Matsumoto Y, Nagatsuka K, Yamaguchi Y, Kudo A. Understanding the reaction mechanism and kinetics of photocatalytic oxygen evolution on CoOx-loaded bismuth vanadate. J Chem Phys 2023; 159:214706. [PMID: 38047512 DOI: 10.1063/5.0177506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 11/09/2023] [Indexed: 12/05/2023] Open
Abstract
Photocatalytic water splitting for green hydrogen production is hindered by the sluggish kinetics of oxygen evolution reaction (OER). Loading a co-catalyst is essential for accelerating the kinetics, but the detailed reaction mechanism and role of the co-catalyst are still obscure. Here, we focus on cobalt oxide (CoOx) loaded on bismuth vanadate (BiVO4) to investigate the impact of CoOx on the OER mechanism. We employ photoelectrochemical impedance spectroscopy and simultaneous measurements of photoinduced absorption and photocurrent. The reduction of V5+ in BiVO4 promotes the formation of a surface state on CoOx that plays a crucial role in the OER. The third-order reaction rate with respect to photohole charge density indicates that reaction intermediate species accumulate in the surface state through a three-electron oxidation process prior to the rate-determining step. Increasing the excitation light intensity onto the CoOx-loaded anode improves the photoconversion efficiency significantly, suggesting that the OER reaction at dual sites in an amorphous CoOx(OH)y layer dominates over single sites. Therefore, CoOx is directly involved in the OER by providing effective reaction sites, stabilizing reaction intermediates, and improving the charge transfer rate. These insights help advance our understanding of co-catalyst-assisted OER to achieve efficient water splitting.
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Affiliation(s)
- Yoshiyasu Matsumoto
- Toyota Physical and Chemical Research Institute, Nagakute, Aichi 480-1192, Japan
| | - Kengo Nagatsuka
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Tokyo 162-8601, Japan
| | - Yuichi Yamaguchi
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Tokyo 162-8601, Japan
- Carbon Value Research Center, Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Akihiko Kudo
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Tokyo 162-8601, Japan
- Carbon Value Research Center, Research Institute for Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
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8
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Kawashima K, Márquez RA, Smith LA, Vaidyula RR, Carrasco-Jaim OA, Wang Z, Son YJ, Cao CL, Mullins CB. A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts. Chem Rev 2023. [PMID: 37967475 DOI: 10.1021/acs.chemrev.3c00005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Transition metal borides, carbides, pnictides, and chalcogenides (X-ides) have emerged as a class of materials for the oxygen evolution reaction (OER). Because of their high earth abundance, electrical conductivity, and OER performance, these electrocatalysts have the potential to enable the practical application of green energy conversion and storage. Under OER potentials, X-ide electrocatalysts demonstrate various degrees of oxidation resistance due to their differences in chemical composition, crystal structure, and morphology. Depending on their resistance to oxidation, these catalysts will fall into one of three post-OER electrocatalyst categories: fully oxidized oxide/(oxy)hydroxide material, partially oxidized core@shell structure, and unoxidized material. In the past ten years (from 2013 to 2022), over 890 peer-reviewed research papers have focused on X-ide OER electrocatalysts. Previous review papers have provided limited conclusions and have omitted the significance of "catalytically active sites/species/phases" in X-ide OER electrocatalysts. In this review, a comprehensive summary of (i) experimental parameters (e.g., substrates, electrocatalyst loading amounts, geometric overpotentials, Tafel slopes, etc.) and (ii) electrochemical stability tests and post-analyses in X-ide OER electrocatalyst publications from 2013 to 2022 is provided. Both mono and polyanion X-ides are discussed and classified with respect to their material transformation during the OER. Special analytical techniques employed to study X-ide reconstruction are also evaluated. Additionally, future challenges and questions yet to be answered are provided in each section. This review aims to provide researchers with a toolkit to approach X-ide OER electrocatalyst research and to showcase necessary avenues for future investigation.
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Affiliation(s)
- Kenta Kawashima
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Raúl A Márquez
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Lettie A Smith
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Rinish Reddy Vaidyula
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Omar A Carrasco-Jaim
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Ziqing Wang
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Yoon Jun Son
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Chi L Cao
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - C Buddie Mullins
- Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
- Center for Electrochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
- H2@UT, The University of Texas at Austin, Austin, Texas 78712, United States
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9
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Ta XMC, Trần-Phú T, Yuwono JA, Nguyen TKA, Bui AD, Truong TN, Chang LC, Magnano E, Daiyan R, Simonov AN, Tricoli A. Optimal Coatings of Co 3 O 4 Anodes for Acidic Water Electrooxidation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2304650. [PMID: 37863809 DOI: 10.1002/smll.202304650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/23/2023] [Indexed: 10/22/2023]
Abstract
Implementation of proton-exchange membrane water electrolyzers for large-scale sustainable hydrogen production requires the replacement of scarce noble-metal anode electrocatalysts with low-cost alternatives. However, such earth-abundant materials often exhibit inadequate stability and/or catalytic activity at low pH, especially at high rates of the anodic oxygen evolution reaction (OER). Here, the authors explore the influence of a dielectric nanoscale-thin oxide layer, namely Al2 O3 , SiO2 , TiO2 , SnO2 , and HfO2 , prepared by atomic layer deposition, on the stability and catalytic activity of low-cost and active but insufficiently stable Co3 O4 anodes. It is demonstrated that the ALD layers improve both the stability and activity of Co3 O4 following the order of HfO2 > SnO2 > TiO2 > Al2 O3 , SiO2 . An optimal HfO2 layer thickness of 12 nm enhances the Co3 O4 anode durability by more than threefold, achieving over 42 h of continuous electrolysis at 10 mA cm-2 in 1 m H2 SO4 electrolyte. Density functional theory is used to investigate the superior performance of HfO2 , revealing a major role of the HfO2 |Co3 O4 interlayer forces in the stabilization mechanism. These insights offer a potential strategy to engineer earth-abundant materials for low-pH OER catalysts with improved performance from earth-abundant materials for efficient hydrogen production.
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Affiliation(s)
- Xuan Minh Chau Ta
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | - Thành Trần-Phú
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | - Jodie A Yuwono
- School of Chemical Engineering & Advanced Materials, The University of Adelaide, Adelaide, SA, 5005, Australia
- College of Engineering and Computer Science, Australian National University, Canberra, ACT, 2601, Australia
| | - Thi Kim Anh Nguyen
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | - Anh Dinh Bui
- School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
| | - Thien N Truong
- School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
| | - Li-Chun Chang
- School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
| | - Elena Magnano
- IOM-CNR, Istituto Officina dei Materiali, AREA Science Park Basovizza, Trieste, 34149, Italy
| | - Rahman Daiyan
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | | | - Antonio Tricoli
- Nanotechnology Research Laboratory, College of Engineering and Computer Science, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
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10
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Su H, Wang S, Liao W, Gan R, Ran Y, Zhao Q, Fang L, Zhang Y. Synergistic Activation of Inert Iron Oxide Basal Planes through Heterostructure Formation and Doping for Efficient Hydrogen Evolution. Chemistry 2023:e202302774. [PMID: 37682016 DOI: 10.1002/chem.202302774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/07/2023] [Accepted: 09/08/2023] [Indexed: 09/09/2023]
Abstract
Iron oxides have emerged as a very promising and cost-effective alternative to precious metal catalysts for hydrogen production. However, the inert basal plane of iron oxides needs to be activated to enhance their catalytic efficiency. In this study, we employed heterostructure engineering and doped nickel to cooperatively activate the basal planes of iron oxide (Ni-Fe2 O3 /CeO2 HSs) to achieve high hydrogen evolution reaction (HER) activity. The Ni-Fe2 O3 /CeO2 HSs electrocatalyst demonstrates excellent basic HER activity and stability, such as an extremely low overpotential of 43 mV at 10 mA cm-2 current density and corresponding Tafel slope of 58.6 mV dec-1 . The increase in electrocatalyst activity and acceleration of hydrogen precipitation kinetics arises from the dual modulation of Ni doping and heterostructure, which not only modulates the electrocatalyst's electronic structure, but also increases the number and exposure of active sites. Remarkably, the generation of heterogeneous structure makes the catalyst se. The Ni-doped catalyst has not only increased HER activity but also low-temperature resistance. These results suggest that the synergistic activation of inert iron oxide basal planes through heterostructure formation and doping is a feasible strategy. Furthermore, for efficient electrocatalytic water splitting, this technique can be extended to other non-noble metal oxides.
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Affiliation(s)
- Hong Su
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| | - Shanshan Wang
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| | - Wanyi Liao
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| | - Rong Gan
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| | - Yiling Ran
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| | - Qin Zhao
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
- School of Life Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
| | - Ling Fang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, No. 266, Fangzheng Avenue, Beibei District, Chongqing, 400714, China
| | - Yan Zhang
- School of Chemistry, Southwest Jiaotong University, Chengdu, Sichuan, 610031, P. R. China
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11
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Liu RT, Xu ZL, Li FM, Chen FY, Yu JY, Yan Y, Chen Y, Xia BY. Recent advances in proton exchange membrane water electrolysis. Chem Soc Rev 2023; 52:5652-5683. [PMID: 37492961 DOI: 10.1039/d2cs00681b] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
Proton exchange membrane water electrolyzers (PEMWEs) are an attractive technology for renewable energy conversion and storage. By using green electricity generated from renewable sources like wind or solar, high-purity hydrogen gas can be produced in PEMWE systems, which can be used in fuel cells and other industrial sectors. To date, significant advances have been achieved in improving the efficiency of PEMWEs through the design of stack components; however, challenges remain for their large-scale and long-term application due to high cost and durability issues in acidic conditions. In this review, we examine the latest developments in engineering PEMWE systems and assess the gap that still needs to be filled for their practical applications. We provide a comprehensive summary of the reaction mechanisms, the correlation among structure-composition-performance, manufacturing methods, system design strategies, and operation protocols of advanced PEMWEs. We also highlight the discrepancies between the critical parameters required for practical PEMWEs and those reported in the literature. Finally, we propose the potential solution to bridge the gap and enable the appreciable applications of PEMWEs. This review may provide valuable insights for research communities and industry practitioners working in these fields and facilitate the development of more cost-effective and durable PEMWE systems for a sustainable energy future.
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Affiliation(s)
- Rui-Ting Liu
- Department of Industrial and Systems Engineering, State Key Laboratory of Ultraprecision Machining Technology, Research Institute of Advanced Manufacturing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
| | - Zheng-Long Xu
- Department of Industrial and Systems Engineering, State Key Laboratory of Ultraprecision Machining Technology, Research Institute of Advanced Manufacturing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
| | - Fu-Min Li
- School of Chemistry and Chemical Engineering, State Key Laboratory of Materials Processing and Die & Mould Technology, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Rd, Wuhan 430074, China.
| | - Fei-Yang Chen
- Department of Industrial and Systems Engineering, State Key Laboratory of Ultraprecision Machining Technology, Research Institute of Advanced Manufacturing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
| | - Jing-Ya Yu
- Department of Industrial and Systems Engineering, State Key Laboratory of Ultraprecision Machining Technology, Research Institute of Advanced Manufacturing, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China.
| | - Ya Yan
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
| | - Yu Chen
- Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Bao Yu Xia
- School of Chemistry and Chemical Engineering, State Key Laboratory of Materials Processing and Die & Mould Technology, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Rd, Wuhan 430074, China.
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12
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Cha DC, Singh TI, Maibam A, Kim TH, Nam DH, Babarao R, Lee S. Metal-Organic Framework-Derived Mesoporous B-Doped CoO/Co@N-Doped Carbon Hybrid 3D Heterostructured Interfaces with Modulated Cobalt Oxidation States for Alkaline Water Splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301405. [PMID: 37165605 DOI: 10.1002/smll.202301405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/28/2023] [Indexed: 05/12/2023]
Abstract
Heteroatom-doped transition metal-oxides of high oxygen evolution reaction (OER) activities interfaced with metals of low hydrogen adsorption energy barrier for efficient hydrogen evolution reaction (HER) when uniformly embedded in a conductive nitrogen-doped carbon (NC) matrix, can mitigate the low-conductivity and high-agglomeration of metal-nanoparticles in carbon matrix and enhances their bifunctional activities. Thus, a 3D mesoporous heterostructure of boron (B)-doped cobalt-oxide/cobalt-metal nanohybrids embedded in NC and grown on a Ni foam substrate (B-CoO/Co@NC/NF) is developed as a binder-free bifunctional electrocatalyst for alkaline water-splitting via a post-synthetic modification of the metal-organic framework and subsequent annealing in different Ar/H2 gas ratios. B-CoO/Co@NC/NF prepared using 10% H2 gas (B-CoO/Co@NC/NF [10% H2 ]) shows the lowest HER overpotential (196 mV) and B-CoO/Co@NC/NF (Ar), developed in Ar, shows an OER overpotential of 307 mV at 10 mA cm-2 with excellent long-term durability for 100 h. The best anode and cathode electrocatalyst-based electrolyzer (B-CoO/Co@NC/NF (Ar)(+)//B-CoO/Co@NC/NF (10% H2 )(-)) generates a current density of 10 mA cm-2 with only 1.62 V with long-term stability. Further, density functional theory investigations demonstrate the effect of B-doping on electronic structure and reaction mechanism of the electrocatalysts for optimal interaction with reaction intermediates for efficient alkaline water-splitting which corroborates the experimental results.
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Affiliation(s)
- Dun Chan Cha
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, 15588, Republic of Korea
| | - Thangjam Ibomcha Singh
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Chemical and Molecular Engineering, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Physics, Manipur University, Canchipur, Manipur, 795003, India
| | - Ashakiran Maibam
- School of Science, RMIT University, Melbourne, Victoria, 3001, Australia
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune, 411 008, India
- Academy of Scientific and Innovative Research, CSIR-Human Resource Development Centre (CSIR-HRDC) Campus, Postal Staff College Area, Ghaziabad, Uttar Pradesh, 201002, India
| | - Tae Hyeong Kim
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, 15588, Republic of Korea
| | - Dong Hwan Nam
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, 15588, Republic of Korea
| | - Ravichandar Babarao
- School of Science, RMIT University, Melbourne, Victoria, 3001, Australia
- Manufacturing, CSIRO, Normanby Road, Clayton, Victoria, 3168, Australia
| | - Seunghyun Lee
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, 15588, Republic of Korea
- Department of Chemical and Molecular Engineering, Hanyang University ERICA, Ansan, 15588, Republic of Korea
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13
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Zhao Y, Adiyeri Saseendran DP, Huang C, Triana CA, Marks WR, Chen H, Zhao H, Patzke GR. Oxygen Evolution/Reduction Reaction Catalysts: From In Situ Monitoring and Reaction Mechanisms to Rational Design. Chem Rev 2023; 123:6257-6358. [PMID: 36944098 DOI: 10.1021/acs.chemrev.2c00515] [Citation(s) in RCA: 35] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
The oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are core steps of various energy conversion and storage systems. However, their sluggish reaction kinetics, i.e., the demanding multielectron transfer processes, still render OER/ORR catalysts less efficient for practical applications. Moreover, the complexity of the catalyst-electrolyte interface makes a comprehensive understanding of the intrinsic OER/ORR mechanisms challenging. Fortunately, recent advances of in situ/operando characterization techniques have facilitated the kinetic monitoring of catalysts under reaction conditions. Here we provide selected highlights of recent in situ/operando mechanistic studies of OER/ORR catalysts with the main emphasis placed on heterogeneous systems (primarily discussing first-row transition metals which operate under basic conditions), followed by a brief outlook on molecular catalysts. Key sections in this review are focused on determination of the true active species, identification of the active sites, and monitoring of the reactive intermediates. For in-depth insights into the above factors, a short overview of the metrics for accurate characterizations of OER/ORR catalysts is provided. A combination of the obtained time-resolved reaction information and reliable activity data will then guide the rational design of new catalysts. Strategies such as optimizing the restructuring process as well as overcoming the adsorption-energy scaling relations will be discussed. Finally, pending current challenges and prospects toward the understanding and development of efficient heterogeneous catalysts and selected homogeneous catalysts are presented.
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Affiliation(s)
- Yonggui Zhao
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | | | - Chong Huang
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Carlos A Triana
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Walker R Marks
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Hang Chen
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Han Zhao
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Greta R Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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14
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Tran-Phu T, Chatti M, Leverett J, Nguyen TKA, Simondson D, Hoogeveen DA, Kiy A, Duong T, Johannessen B, Meilak J, Kluth P, Amal R, Simonov AN, Hocking RK, Daiyan R, Tricoli A. Understanding the Role of (W, Mo, Sb) Dopants in the Catalyst Evolution and Activity Enhancement of Co 3 O 4 during Water Electrolysis via In Situ Spectroelectrochemical Techniques. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2208074. [PMID: 36932896 DOI: 10.1002/smll.202208074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Unlocking the potential of the hydrogen economy is dependent on achieving green hydrogen (H2 ) production at competitive costs. Engineering highly active and durable catalysts for both oxygen and hydrogen evolution reactions (OER and HER) from earth-abundant elements is key to decreasing costs of electrolysis, a carbon-free route for H2 production. Here, a scalable strategy to prepare doped cobalt oxide (Co3 O4 ) electrocatalysts with ultralow loading, disclosing the role of tungsten (W), molybdenum (Mo), and antimony (Sb) dopants in enhancing OER/HER activity in alkaline conditions, is reported. In situ Raman and X-ray absorption spectroscopies, and electrochemical measurements demonstrate that the dopants do not alter the reaction mechanisms but increase the bulk conductivity and density of redox active sites. As a result, the W-doped Co3 O4 electrode requires ≈390 and ≈560 mV overpotentials to reach ±10 and ±100 mA cm-2 for OER and HER, respectively, over long-term electrolysis. Furthermore, optimal Mo-doping leads to the highest OER and HER activities of 8524 and 634 A g-1 at overpotentials of 0.67 and 0.45 V, respectively. These novel insights provide directions for the effective engineering of Co3 O4 as a low-cost material for green hydrogen electrocatalysis at large scales.
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Affiliation(s)
- Thanh Tran-Phu
- Nanotechnology Research Laboratory, Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | - Manjunath Chatti
- School of Chemistry, Monash University, Monash, Victoria, 3800, Australia
| | - Joshua Leverett
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Thi Kim Anh Nguyen
- Nanotechnology Research Laboratory, Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
| | - Darcy Simondson
- School of Chemistry, Monash University, Monash, Victoria, 3800, Australia
| | - Dijon A Hoogeveen
- School of Chemistry, Monash University, Monash, Victoria, 3800, Australia
| | - Alexander Kiy
- Department of Materials Physics, Research School of Physics, The Australian National University, Canberra, ACT, 2601, Australia
| | - The Duong
- School of Engineering, The Australian National University, Canberra, ACT, 2601, Australia
| | | | - Jaydon Meilak
- Department of Chemistry and Biotechnology, Swinburne University, Hawthorn, Victoria, 3166, Australia
| | - Patrick Kluth
- Department of Materials Physics, Research School of Physics, The Australian National University, Canberra, ACT, 2601, Australia
| | - Rose Amal
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Alexandr N Simonov
- School of Chemistry, Monash University, Monash, Victoria, 3800, Australia
| | - Rosalie K Hocking
- Department of Chemistry and Biotechnology, Swinburne University, Hawthorn, Victoria, 3166, Australia
| | - Rahman Daiyan
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Antonio Tricoli
- Nanotechnology Research Laboratory, Research School of Chemistry, The Australian National University, Canberra, ACT, 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, Sydney, NSW, 2006, Australia
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15
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Bischof D, Radiev Y, Tripp MW, Hofmann PE, Geiger T, Bettinger HF, Koert U, Witte G. Chemical Doping by Fluorination and Its Impact on All Energy Levels of π-Conjugated Systems. J Phys Chem Lett 2023; 14:2551-2557. [PMID: 36877682 DOI: 10.1021/acs.jpclett.3c00287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Halogenation of organic molecules causes chemical shifts of C1s core-level binding energies that are commonly used as fingerprints to identify chemical species. Here, we use synchrotron-based X-ray photoelectron spectroscopy and density functional theory calculations to unravel such chemical shifts by examining different partially fluorinated pentacene derivatives. Core-level shifts occur even for carbon atoms distant from the fluorination positions, yielding a continuous shift of about 1.8 eV with increasing degree of fluorination for pentacenes. Since also their LUMO energies shift markedly with the degree of fluorination of the acenes, core-level shifts result in a nearly constant excitation energy of the leading π* resonance as obtained in complementary recorded K-edge X-ray absorption spectra, hence demonstrating that local fluorination affects the entire π-system, including valence and core levels. Our results thus challenge the common picture of characteristic chemical core-level energies as fingerprint signatures of fluorinated π-conjugated molecules.
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Affiliation(s)
- Daniel Bischof
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 7, 35032 Marburg, Germany
| | - Yurii Radiev
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 7, 35032 Marburg, Germany
| | - Matthias W Tripp
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35043 Marburg, Germany
| | - Philipp E Hofmann
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35043 Marburg, Germany
| | - Thomas Geiger
- Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Holger F Bettinger
- Institut für Organische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Ulrich Koert
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35043 Marburg, Germany
| | - Gregor Witte
- Fachbereich Physik, Philipps-Universität Marburg, Renthof 7, 35032 Marburg, Germany
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16
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Liang J, Zu H, Si H, Ma Y, Li M. Synthesis of ethane-disulfonate pillared layered cobalt hydroxide towards the electrocatalytic oxygen evolution reaction. Dalton Trans 2023; 52:2115-2123. [PMID: 36722796 DOI: 10.1039/d2dt03358e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We report the synthesis of a hybrid layered cobalt hydroxide sample and its redox behaviors in the electrochemical oxygen evolution reaction (OER). Compound Co7(OH)12(C2H4S2O6)·1.6H2O was synthesized via a homogeneous alkalization reaction using Co(SO3C2H4SO3) and hexamethylenetetramine. This compound comprises cationic host layers of {[Co7(OH)12]2+}∞, which comprise octahedrally (CoOh) and tetrahedrally (CoTd) coordinated Co cations at a CoOh : CoTd ratio of 5 : 2. The ethane-disulfonate ions are combined with the cationic host layers by electrostatic attractions and hydrogen bonding as a hybrid pillared layered framework. This hybrid sample can promote the OER in 1 M KOH with an overpotential as low as ∼410 mV (at a current density of 10 mA cm-2). In situ Raman spectroscopy showed that the sample first evolved into Co(III)-based phases comprising a mixture of layered CoOOH and spinel Co3O4, and the Co(III)-based compounds were converted into Co(IV)-O intermediates containing [CoO6] units at the onsite of the OER. The structural evolution behaviors suggest that the catalyst prefers a topotactic phase transition and the CoOh and CoTd units exhibit different activities in the electrochemical reaction. The electron transfer events involved in the electrochemical reaction were identified by Fourier-transformed alternating current voltammetry.
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Affiliation(s)
- Jianbo Liang
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China.
| | - Hang Zu
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China.
| | - Huiling Si
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China.
| | - Yanhong Ma
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China.
| | - Mengyao Li
- Department of Chemistry, Capital Normal University, Beijing, 100048, P. R. China.
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17
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Liu J, Han Y, Liu C, Yang B, Liu Z. Origin of the Liquid/Gaseous Water Binding Energy Splitting Measured via X-ray Photoelectron Spectroscopy. J Phys Chem Lett 2023; 14:863-869. [PMID: 36657017 DOI: 10.1021/acs.jpclett.2c03099] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Ambient-pressure X-ray photoelectron spectroscopy (APXPS) provides an effective way of tackling the challenge of detecting chemical states within complex systems. Here a fundamental understanding of the core-level shift (CLS) of water in the liquid/gas phase observed via APXPS is obtained with computational modeling at the molecular and electronic levels. The CLS value of ∼2 eV derived from experiments is reproduced by modeling in terms of the total shift and photon energy dependence. The contributions of collective electrical effects, including electrostatic potential, orbital deformation, and electronic polarization, to the CLS were further analyzed and discussed. Our results show that the CLS is dominated by the final state effect due to electronic polarization of the surrounding molecules following photoionization, while the peak broadening is mainly determined by the electrostatic potential, which belongs to an initial state effect. The physical insights and computational approaches could be further applied to study more complex molecules or materials.
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Affiliation(s)
- Jian Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Yong Han
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, China
- Center for Transformative Science, ShanghaiTech University, Shanghai201210, China
| | - Chiyan Liu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai200050, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Bo Yang
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, China
| | - Zhi Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai201210, China
- Center for Transformative Science, ShanghaiTech University, Shanghai201210, China
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18
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Freiberg AT, Qian S, Wandt J, Gasteiger HA, Crumlin EJ. Surface Oxygen Depletion of Layered Transition Metal Oxides in Li-Ion Batteries Studied by Operando Ambient Pressure X-ray Photoelectron Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4743-4754. [PMID: 36623251 PMCID: PMC9880953 DOI: 10.1021/acsami.2c19008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
A new operando spectro-electrochemical setup was developed to study oxygen depletion from the surface of layered transition metal oxide particles at high degrees of delithiation. An NCM111 working electrode was paired with a chemically delithiated LiFePO4 counter electrode in a fuel cell-inspired membrane electrode assembly (MEA). A propylene carbonate-soaked Li-ion conducting ionomer served as an electrolyte, providing both good electrochemical performance and direct probing of the NCM111 particles during cycling by ambient pressure X-ray photoelectron spectroscopy. The irreversible emergence of an oxygen-depleted phase in the O 1s spectra of the layered oxide particles was observed upon the first delithiation to high state-of-charge, which is in excellent agreement with oxygen release analysis via mass spectrometry analysis of such MEAs. By comparing the metal oxide-based O 1s spectral features to the Ni 2p3/2 intensity, we can calculate the transition metal-to-oxygen ratio of the metal oxide close to the particle surface, which shows good agreement with the formation of a spinel-like stoichiometry as an oxygen-depleted phase. This new setup enables a deeper understanding of interfacial changes of layered oxide-based cathode active materials for Li-ion batteries upon cycling.
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Affiliation(s)
- Anna T.S. Freiberg
- Chair
of Technical Electrochemistry, Department of Chemistry and Catalysis
Research Center, Technical University of
Munich, Garching
bei MünchenD-85748, Germany
| | - Simon Qian
- Chair
of Technical Electrochemistry, Department of Chemistry and Catalysis
Research Center, Technical University of
Munich, Garching
bei MünchenD-85748, Germany
| | - Johannes Wandt
- Chair
of Technical Electrochemistry, Department of Chemistry and Catalysis
Research Center, Technical University of
Munich, Garching
bei MünchenD-85748, Germany
| | - Hubert A. Gasteiger
- Chair
of Technical Electrochemistry, Department of Chemistry and Catalysis
Research Center, Technical University of
Munich, Garching
bei MünchenD-85748, Germany
| | - Ethan J. Crumlin
- Advanced
Light Source, Lawrence Berkeley National
Laboratory, Berkeley, California94720, United States
- Chemical
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California94720, United States
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19
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Hu Y, Hu C, Du A, Xiao T, Yu L, Yang C, Xie W. Interfacial Evolution on Co-based Oxygen Evolution Reaction Electrocatalysts Probed by Using In Situ Surface-Enhanced Raman Spectroscopy. Anal Chem 2023; 95:1703-1709. [PMID: 36583685 DOI: 10.1021/acs.analchem.2c04931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Disclosing the roles of reactive sites at catalytic interfaces is of paramount importance for understanding the reaction mechanism. However, due to the difficulties in the detection of reaction intermediates in the complex heterophase reaction system, disentangling the highly convolved roles of different surface atoms remains challenging. Herein, we used CoOx as a model catalyst to study the synergy of CoTd2+ and CoOh3+ active sites in the electrocatalytic oxygen evolution reaction (OER). The formation and evolution of reaction intermediates on the catalyst surface during the OER process were investigated by in situ surface-enhanced Raman spectroscopy (SERS). According to the SERS results in ion-substitution experiments, CoOh3+ is the catalytic site for the conversion of OH- to O-O- intermediate species (1140-1180 cm-1). CoOOH (503 cm-1) and CoO2 (560 cm-1) active centers generated during the OER, at the original CoTd2+ sites of CoOx, eventually serve as the O2 release sites (conversion of O-O- intermediate to O2). The mechanism was further confirmed on Co2+-Co3+ layered double hydroxides (LDHs), where an optimal ratio of 1:1.2 (Co2+/Co3+) is required to balance O-O- generation and O2 release. This work highlights the synergistic role of metal atoms at different valence statuses in water oxidation and sheds light on surface component engineering for the rational design of high-performance heterogeneous catalysts.
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Affiliation(s)
- Yanfang Hu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Tianjin Key Lab of Biosensing & Molecular Recognition, Haihe Laboratory of Sustainable Chemical Transformations, Renewable Energy Conversion and Storage Center College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin300071, China
| | - Cejun Hu
- College of Materials Science and Engineering, Fuzhou University, Fuzhou350108, China
| | - Aoxuan Du
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Tianjin Key Lab of Biosensing & Molecular Recognition, Haihe Laboratory of Sustainable Chemical Transformations, Renewable Energy Conversion and Storage Center College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin300071, China
| | - Tiantian Xiao
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou350207, China
| | - Linfeng Yu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Tianjin Key Lab of Biosensing & Molecular Recognition, Haihe Laboratory of Sustainable Chemical Transformations, Renewable Energy Conversion and Storage Center College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin300071, China
| | - Chengkai Yang
- College of Materials Science and Engineering, Fuzhou University, Fuzhou350108, China
| | - Wei Xie
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Tianjin Key Lab of Biosensing & Molecular Recognition, Haihe Laboratory of Sustainable Chemical Transformations, Renewable Energy Conversion and Storage Center College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin300071, China
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20
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Luan C, Corva M, Hagemann U, Wang H, Heidelmann M, Tschulik K, Li T. Atomic-Scale Insights into Morphological, Structural, and Compositional Evolution of CoOOH during Oxygen Evolution Reaction. ACS Catal 2023. [DOI: 10.1021/acscatal.2c03903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Chenglong Luan
- Institute for Materials, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Manuel Corva
- Faculty of Chemistry and Biochemistry, Analytical Chemistry II, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Ulrich Hagemann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN) and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, 47057 Duisburg, Germany
| | - Hongcai Wang
- Institute for Materials, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany
| | - Markus Heidelmann
- Interdisciplinary Center for Analytics on the Nanoscale (ICAN) and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, 47057 Duisburg, Germany
| | - Kristina Tschulik
- Faculty of Chemistry and Biochemistry, Analytical Chemistry II, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, 40237 Düsseldorf, Germany
| | - Tong Li
- Institute for Materials, Ruhr-Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany
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21
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Recent Advances in In Situ/Operando Surface/Interface Characterization Techniques for the Study of Artificial Photosynthesis. INORGANICS 2022. [DOI: 10.3390/inorganics11010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
(Photo-)electrocatalytic artificial photosynthesis driven by electrical and/or solar energy that converts water (H2O) and carbon dioxide (CO2) into hydrogen (H2), carbohydrates and oxygen (O2), has proven to be a promising and effective route for producing clean alternatives to fossil fuels, as well as for storing intermittent renewable energy, and thus to solve the energy crisis and climate change issues that we are facing today. Basic (photo-)electrocatalysis consists of three main processes: (1) light absorption, (2) the separation and transport of photogenerated charge carriers, and (3) the transfer of photogenerated charge carriers at the interfaces. With further research, scientists have found that these three steps are significantly affected by surface and interface properties (e.g., defect, dangling bonds, adsorption/desorption, surface recombination, electric double layer (EDL), surface dipole). Therefore, the catalytic performance, which to a great extent is determined by the physicochemical properties of surfaces and interfaces between catalyst and reactant, can be changed dramatically under working conditions. Common approaches for investigating these phenomena include X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning probe microscopy (SPM), wide angle X-ray diffraction (WAXRD), auger electron spectroscopy (AES), transmission electron microscope (TEM), etc. Generally, these techniques can only be applied under ex situ conditions and cannot fully recover the changes of catalysts in real chemical reactions. How to identify and track alterations of the catalysts, and thus provide further insight into the complex mechanisms behind them, has become a major research topic in this field. The application of in situ/operando characterization techniques enables real-time monitoring and analysis of dynamic changes. Therefore, researchers can obtain physical and/or chemical information during the reaction (e.g., morphology, chemical bonding, valence state, photocurrent distribution, surface potential variation, surface reconstruction), or even by the combination of these techniques as a suite (e.g., atomic force microscopy-based infrared spectroscopy (AFM-IR), or near-ambient-pressure STM/XPS combined system (NAP STM-XPS)) to correlate the various properties simultaneously, so as to further reveal the reaction mechanisms. In this review, we briefly describe the working principles of in situ/operando surface/interface characterization technologies (i.e., SPM and X-ray spectroscopy) and discuss the recent progress in monitoring relevant surface/interface changes during water splitting and CO2 reduction reactions (CO2RR). We hope that this review will provide our readers with some ideas and guidance about how these in situ/operando characterization techniques can help us investigate the changes in catalyst surfaces/interfaces, and further promote the development of (photo-)electrocatalytic surface and interface engineering.
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22
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Kreider ME, Burke Stevens M. Material Changes in Electrocatalysis: An In Situ/Operando Focus on the Dynamics of Cobalt‐Based Oxygen Reduction and Evolution Catalysts. ChemElectroChem 2022. [DOI: 10.1002/celc.202200958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Melissa E. Kreider
- Department of Chemical Engineering Stanford University 443 Via Ortega, Stanford California 94305 United States
- SUNCAT Center for Interface Science and Catalysis SLAC National Accelerator Laboratory Menlo Park California 94025 United States
| | - Michaela Burke Stevens
- SUNCAT Center for Interface Science and Catalysis SLAC National Accelerator Laboratory Menlo Park California 94025 United States
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23
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He Y, Sheng J, Ren Q, Sun Y, Hao W, Dong F. Operando Identification of Dynamic Photoexcited Oxygen Vacancies as True Catalytic Active Sites. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ye He
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jianping Sheng
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Qin Ren
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Yanjuan Sun
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Weichang Hao
- School of Physics and BUAA-UOW Joint Research Centre, Beihang University, Beijing 100191, China
| | - Fan Dong
- School of Resources and Environment & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
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24
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Liu Y, Zhang W, Zheng W. Surface chemistry of MXene quantum dots: Virus mechanism-inspired mini-lab for catalysis. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(22)64167-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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25
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Hao H, Ruiz Pestana L, Qian J, Liu M, Xu Q, Head‐Gordon T. Chemical transformations and transport phenomena at interfaces. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2022. [DOI: 10.1002/wcms.1639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hongxia Hao
- Kenneth S. Pitzer Theory Center and Department of Chemistry University of California Berkeley California USA
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
| | - Luis Ruiz Pestana
- Department of Civil and Architectural Engineering University of Miami Coral Gables Florida USA
| | - Jin Qian
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
| | - Meili Liu
- Department of Civil and Architectural Engineering University of Miami Coral Gables Florida USA
| | - Qiang Xu
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
| | - Teresa Head‐Gordon
- Kenneth S. Pitzer Theory Center and Department of Chemistry University of California Berkeley California USA
- Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley California USA
- Department of Bioengineering and Chemical and Biomolecular Engineering University of California Berkeley California USA
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26
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Surface Reconstruction of Cobalt-Based Polyoxometalate and CNT Fiber Composite for Efficient Oxygen Evolution Reaction. Catalysts 2022. [DOI: 10.3390/catal12101242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Polyoxometalates (POMs), as carbon-free metal-oxo-clusters with unique structural properties, are emerging water-splitting electrocatalysts. Herein, we explore the development of cobalt-containing polyoxometalate immobilized over the carbon nanotube fiber (CNTF) (Co4POM@CNTF) towards efficient electrochemical oxygen evolution reaction (OER). CNTF serves as an excellent electron mediator and highly conductive support, while the self-activation of the part of Co4POM through restructuring in basic media generates cobalt oxides and/or hydroxides that serve as catalytic sites for OER. A modified electrode fabricated through the drop-casting method followed by thermal treatment showed higher OER activity and enhanced stability in alkaline media. Furthermore, advanced physical characterization and electrochemical results demonstrate efficient charge transfer kinetics and high OER performance in terms of low overpotential, small Tafel slope, and good stability over an extended reaction time. The significantly high activity and stability achieved can be ascribed to the efficient electron transfer and highly electrochemically active surface area (ECSA) of the self-activated electrocatalyst immobilized over the highly conductive CNTF. This research is expected to pave the way for developing POM-based electrocatalysts for oxygen electrocatalysis.
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27
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Composite nanoarchitectonics of ZIF-67 derived CoSe2/rGO with superior charge transfer for oxygen evolution reaction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140785] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Tran-Phu T, Chen H, Daiyan R, Chatti M, Liu B, Amal R, Liu Y, Macfarlane DR, Simonov AN, Tricoli A. Nanoscale TiO 2 Coatings Improve the Stability of an Earth-Abundant Cobalt Oxide Catalyst during Acidic Water Oxidation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:33130-33140. [PMID: 35838141 DOI: 10.1021/acsami.2c05849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The large-scale deployment of proton-exchange membrane water electrolyzers for high-throughput sustainable hydrogen production requires transition from precious noble metal anode electrocatalysts to low-cost earth-abundant materials. However, such materials are commonly insufficiently stable and/or catalytically inactive at low pH, and positive potentials required to maintain high rates of the anodic oxygen evolution reaction (OER). To address this, we explore the effects of a dielectric nanoscale-thin layer, constituted of amorphous TiO2, on the stability and electrocatalytic activity of nanostructured OER anodes based on low-cost Co3O4. We demonstrate a direct correlation between the OER performance and the thickness of the atomic layer deposited TiO2 layers. An optimal TiO2 layer thickness of 4.4 nm enhances the anode lifetime by a factor of ca. 3, achieving 80 h of continuous electrolysis at pH near zero, while preserving high OER catalytic activity of the bare Co3O4 surface. Thinner and thicker TiO2 layers decrease the stability and activity, respectively. This is attributed to the pitting of the TiO2 layer at the optimal thickness, which allows for access to the catalytically active Co3O4 surface while stabilizing it against corrosion. These insights provide directions for the engineering of active and stable composite earth-abundant materials for acidic water splitting for high-throughput hydrogen production.
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Affiliation(s)
- Thanh Tran-Phu
- Nanotechnology Research Laboratory, College of Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, NSW 2006, Australia
| | - Hongjun Chen
- The University of Sydney Nano Institute (Sydney Nano) and School of Physics, University of Sydney, Sydney 2006, Australia
| | - Rahman Daiyan
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Manjunath Chatti
- School of Chemistry, Monash University, Victoria 3800, Australia
| | - Borui Liu
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, NSW 2006, Australia
| | - Rose Amal
- Particles and Catalysis Research Laboratory, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Yun Liu
- Research School of Chemistry, The Australian National University, Canberra 2601, Australia
| | | | | | - Antonio Tricoli
- Nanotechnology Research Laboratory, College of Science, Research School of Chemistry, The Australian National University, Canberra, ACT 2601, Australia
- Nanotechnology Research Laboratory, Faculty of Engineering, University of Sydney, NSW 2006, Australia
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29
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Zhang M, Wang J, Ma L, Gong Y. Spontaneous Synthesis of Silver Nanoparticles on Cobalt-Molybdenum Layer Double Hydroxide Nanocages for Improved Oxygen Evolution Reaction. J Colloid Interface Sci 2022; 628:299-307. [DOI: 10.1016/j.jcis.2022.07.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 11/30/2022]
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30
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Hu C, Hu Y, Zhu A, Li M, Wei J, Zhang Y, Xie W. Several Key Factors for Efficient Electrocatalytic Water Splitting: Active Site Coordination Environment, Morphology Changes and Intermediates Identification. Chemistry 2022; 28:e202200138. [DOI: 10.1002/chem.202200138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Cejun Hu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Haihe Laboratory of Sustainable Chemical Transformations Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
| | - Yanfang Hu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Haihe Laboratory of Sustainable Chemical Transformations Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
| | - Aonan Zhu
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Haihe Laboratory of Sustainable Chemical Transformations Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
| | - Mingming Li
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Haihe Laboratory of Sustainable Chemical Transformations Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
| | - Junli Wei
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Haihe Laboratory of Sustainable Chemical Transformations Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
| | - Yuying Zhang
- School of Medicine Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
| | - Wei Xie
- Key Lab of Advanced Energy Materials Chemistry (Ministry of Education) Haihe Laboratory of Sustainable Chemical Transformations Renewable Energy Conversion and Storage Center College of Chemistry Nankai University Weijin Rd. 94 Tianjin 300071 P. R. China
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31
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Armillotta F, Bidoggia D, Baronio S, Biasin P, Annese A, Scardamaglia M, Zhu S, Bozzini B, Modesti S, Peressi M, Vesselli E. Single Metal Atom Catalysts and ORR: H-Bonding, Solvation, and the Elusive Hydroperoxyl Intermediate. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Francesco Armillotta
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
| | - Davide Bidoggia
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
| | - Stefania Baronio
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
| | - Pietro Biasin
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
| | - Antonio Annese
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
| | | | - Suyun Zhu
- MAX IV Laboratory, Fotongatan 8, 224 84 Lund, Sweden
| | | | - Silvio Modesti
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
- CNR-IOM, Area Science Park, S.S. 14 km 163.5, 34149 Basovizza, Trieste, Italy
| | - Maria Peressi
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
| | - Erik Vesselli
- Department of Physics, University of Trieste, via A. Valerio 2, 34127 Trieste, Italy
- CNR-IOM, Area Science Park, S.S. 14 km 163.5, 34149 Basovizza, Trieste, Italy
- Center for Energy, Environment and Transport Giacomo Ciamician, University of Trieste, 34127 Trieste, Italy
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32
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Wiegmann T, Pacheco I, Reikowski F, Stettner J, Qiu C, Bouvier M, Bertram M, Faisal F, Brummel O, Libuda J, Drnec J, Allongue P, Maroun F, Magnussen OM. Operando Identification of the Reversible Skin Layer on Co 3O 4 as a Three-Dimensional Reaction Zone for Oxygen Evolution. ACS Catal 2022; 12:3256-3268. [PMID: 35359579 PMCID: PMC8939430 DOI: 10.1021/acscatal.1c05169] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/06/2022] [Indexed: 01/19/2023]
Abstract
![]()
Co oxides and oxyhydroxides
have been studied extensively in the
past as promising electrocatalysts for the oxygen evolution reaction
(OER) in neutral to alkaline media. Earlier studies showed the formation
of an ultrathin CoOx(OH)y skin layer on Co3O4 at potentials
above 1.15 V vs reversible hydrogen electrode (RHE), but the precise
influence of this skin layer on the OER reactivity is still under
debate. We present here a systematic study of epitaxial spinel-type
Co3O4 films with defined (111) orientation,
prepared on different substrates by electrodeposition or physical
vapor deposition. The OER overpotential of these samples may vary
up to 120 mV, corresponding to two orders of magnitude differences
in current density, which cannot be accounted for by differences in
the electrochemically active surface area. We demonstrate by a careful
analysis of operando surface X-ray diffraction measurements
that these differences are clearly correlated with the average thickness
of the skin layer. The OER reactivity increases with the amount of
formed skin layer, indicating that the entire three-dimensional skin
layer is an OER-active interphase. Furthermore, a scaling relationship
between the reaction centers in the skin layer and the OER activity
is established. It suggests that two lattice sites are involved in
the OER mechanism.
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Affiliation(s)
- Tim Wiegmann
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Ivan Pacheco
- Laboratoire de Physique de la Matière Condensée (PMC), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Finn Reikowski
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Jochim Stettner
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Canrong Qiu
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
| | - Mathilde Bouvier
- Laboratoire de Physique de la Matière Condensée (PMC), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Manon Bertram
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Firas Faisal
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Olaf Brummel
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Jörg Libuda
- Interface Research and Catalysis, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Jakub Drnec
- European Synchrotron Radiation Facility, 38000 Grenoble, France
| | - Philippe Allongue
- Laboratoire de Physique de la Matière Condensée (PMC), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Fouad Maroun
- Laboratoire de Physique de la Matière Condensée (PMC), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91120 Palaiseau, France
| | - Olaf M. Magnussen
- Institute of Experimental and Applied Physics, Kiel University, 24118 Kiel, Germany
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33
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Gan X, Guo X, Li S, Wang Y, Wang F, Lv X. Hollow Co layered double hydroxide decorated Ag nanoparticles for oxygen evolution reaction. ChemElectroChem 2022. [DOI: 10.1002/celc.202200114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xingyu Gan
- Qufu Normal University School of Chemistry and Chiamical Engineering CHINA
| | - Xinjie Guo
- Qufu Normal University School of Chemistry and Chiamical Engineering CHINA
| | - Suozhu Li
- Qufu Normal University School of Chemistry and Chiamical Engineering CHINA
| | - Yun Wang
- Qufu Normal University School of Chemistry and Chiamical Engineering CHINA
| | - Fengxiang Wang
- Qufu Normal University School of Chemistry and Chiamical Engineering CHINA
| | - Xiaoxia Lv
- Qufu Normal University School of Chemistry and Chemical Engineering 57 Jingxuan West Road 273165 Qufu CHINA
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34
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Barry ME, Aydogan Gokturk P, DeStefano AJ, Leonardi AK, Ober CK, Crumlin EJ, Segalman RA. Effects of Amphiphilic Polypeptoid Side Chains on Polymer Surface Chemistry and Hydrophilicity. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7340-7349. [PMID: 35089024 DOI: 10.1021/acsami.1c22683] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Polymers are commonly used in applications that require long-term exposure to water and aqueous mixtures, serving as water purification membranes, marine antifouling coatings, and medical implants, among many other applications. Because polymer surfaces restructure in response to the surrounding environment, in situ characterization is crucial for providing an accurate understanding of the surface chemistry under conditions of use. To investigate the effects of surface-active side chains on polymer surface chemistry and resultant interactions with interfacial water (i.e., water sorption), we present synchrotron ambient pressure X-ray photoelectron spectroscopy (APXPS) studies performed on poly(ethylene oxide) (PEO)- and poly(dimethylsiloxane) (PDMS)-based polymer surfaces modified with amphiphilic polypeptoid side chains, previously demonstrated to be efficacious in marine fouling prevention and removal. The polymer backbone and environmental conditions were found to affect polypeptoid surface presentation: due to the surface segregation of its fluorinated polypeptoid monomers under vacuum, the PEO-peptoid copolymer showed significant polypeptoid content in both vacuum and hydrated conditions, while the modified PDMS-based copolymer showed increased polypeptoid content only in hydrated conditions due to the hydrophilicity of the ether monomers and polypeptoid backbone. Polypeptoids were found to bind approximately 2.8 water molecules per monomer unit in both copolymers, and the PEO-peptoid surface showed substantial water sorption that suggests a surface with a more diffuse water/polymer interface. This work implies that side chains are ideal for tuning water affinity without altering the base polymer composition, provided that surface-driving groups are present to ensure activity at the interface. These types of systematic modifications will generate novel polymers that maximize bound interfacial water and can deliver surface-active groups to the surface to improve the effectiveness of polymer materials.
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Affiliation(s)
- Mikayla E Barry
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Pinar Aydogan Gokturk
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Audra J DeStefano
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Amanda K Leonardi
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Christopher K Ober
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Ethan J Crumlin
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Rachel A Segalman
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
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35
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Qian J, Crumlin EJ, Prendergast D. Efficient basis sets for core-excited states motivated by Slater's rules. Phys Chem Chem Phys 2022; 24:2243-2250. [PMID: 35014633 DOI: 10.1039/d1cp03931h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-Ray photoemission spectroscopy is a commonly applied characterization technique that probes the local chemistry of atoms in molecules and materials via the photoexcitation of electrons from atomic core orbitals. These measurements can be interpreted by comparison with previous literature or through the calculation of core-electron binding energies (CEBEs) for model systems. However, physically and numerically accurate description of the core-excited electronic structures demands specializations beyond routine ground state setups. Inspired by Slater's rules, we focus on developing computationally efficient and physically motivated contractions to reproduce the core-excited atomic orbitals which led to improved numerical accuracy of calculated CEBEs. When applied to carbon 1s excitations in a wide range of molecules, these core-excited basis sets produce total energy differences (ΔSCF) using a hybrid exact-exchange density functional (B3LYP) that can reproduce core-excitation energies within experimental accuracy (∼0.1 eV). Due to missing relativistic effects, heavier elements (N, O) exhibit slightly larger systematic absolute errors, but still maintain a satisfactory 0.2 eV mean average error for relative CEBEs. We also connect the known variability in the core level binding energy with local atomic charge to demonstrate how the transferability of a given model should be measured against a diverse test set. We conclude by exploring one outlier, CO, and the outlook for extending this approach to other elements.
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Affiliation(s)
- Jin Qian
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Ethan J Crumlin
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - David Prendergast
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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36
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Zhao S, Yang Y, Tang Z. Insight into Structural Evolution, Active Sites, and Stability of Heterogeneous Electrocatalysts. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110186] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Shenlong Zhao
- School of Chemical and Biomolecular Engineering The University of Sydney Sydney NSW 2006 Australia
| | - Yongchao Yang
- School of Chemical and Biomolecular Engineering The University of Sydney Sydney NSW 2006 Australia
| | - Zhiyong Tang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 P. R. China
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37
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Jiang N, Zhu Z, Xue W, Xia BY, You B. Emerging Electrocatalysts for Water Oxidation under Near-Neutral CO 2 Reduction Conditions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2105852. [PMID: 34658063 DOI: 10.1002/adma.202105852] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/05/2021] [Indexed: 06/13/2023]
Abstract
Electrocatalytic CO2 reduction reaction (CO2 RR), which produces valuable fuels and chemicals under near-neutral conditions, offers a renewable approach to alleviate the global energy crisis as well as the increasing concerns on climate change. However, to implement this strategy, one of the major challenges, the sluggish kinetics of the paired oxygen evolution reaction (OER) at anode, needs to be surmounted. It is therefore highly desirable to explore high-performance and cost-effective OER electrocatalysts suitable for CO2 RR conditions, which is very different from those widely investigated under acidic or alkaline conditions. In this review, the ongoing development of OER electrocatalysts under near pH-neutral CO2 -saturated (bi)carbonate solutions are highlighted and the future opportunities are discussed. It is started with a brief introduction on OER paired with CO2 RR, the relevant theoretical tools such as density functional theory (DFT) and particularly machine learning (ML), and the operando characterization techniques. Then, there are some detailed discussions of recent progress on the rational design of OER electrocatalysts under CO2 RR conditions ranging from noble-metal oxides to nonprecious metal phosphides, carbonates, (hydro)oxides, and so on. Finally, a perspective for developing OER electrocatalysts integrated with CO2 electroreduction is proposed.
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Affiliation(s)
- Nan Jiang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, China
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV), Las Vegas, NV, 89154, USA
- Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Zhiwei Zhu
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, China
| | - Wenjie Xue
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, China
| | - Bao Yu Xia
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, China
| | - Bo You
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, 430074, China
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38
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Meng XY, Wang M, Zhang Y, Li Z, Ding X, Zhang W, Li C, Li Z. Superimposed OER and UOR performances by the interaction of each component in an Fe–Mn electrocatalyst. Dalton Trans 2022; 51:16605-16611. [DOI: 10.1039/d2dt02780a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An Fe–Mn based OER and UOR bifunctional catalyst is synthesized through electrodeposition. Mn serves as a co-catalyst of Fe for OER. Both Mn and Fe act as active sites for UOR.
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Affiliation(s)
- Xin-ying Meng
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, P. R. China
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Meng Wang
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, P. R. China
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Yicong Zhang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Zhihao Li
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Xiaogang Ding
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Weiquan Zhang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Can Li
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, P. R. China
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
| | - Zhen Li
- Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen, 518057, P. R. China
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, P. R. China
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39
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Chen J, Yang S, Zhang Z, Wang F. Biomass-derived cobalt/carbon hierarchically structured composites for efficient oxygen electrocatalysis and zinc–air batteries. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00720g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we constructed a biomass-derived composite (denoted as Co@Co–N,S–C), which exhibited excellent efficient bifunctional performance for ORR/OER, as well as an outstanding performance when employed in secondary zinc–air batteries.
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Affiliation(s)
- Jing Chen
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P R China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Shaoxuan Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P R China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zhengping Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P R China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Feng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P R China
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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40
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Politano A. On the fate of high-resolution electron energy loss spectroscopy (HREELS), a versatile probe to detect surface excitations: will the Phoenix rise again? Phys Chem Chem Phys 2021; 23:26061-26069. [PMID: 34812442 DOI: 10.1039/d1cp03804d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
From its advent, high-resolution electron energy loss spectroscopy (HREELS) has emerged as one of the most versatile tools in surface science. In the last few decades, HREELS was widely used for the fundamental study of (i) chemical reactions at the surfaces of model catalysts (mostly single crystals), (ii) lattice dynamics (phonons), (iii) surface plasmons and (iv) magnons. However, HREELS has experienced a continuous decay of the number of daily users worldwide so far, due to several factors. However, the rise of Dirac materials (graphene, topological insulators, Dirac semimetals) offers new perspectives for HREELS, due to its unique features enabling ultrasensitive detection of (i) chemical modifications at their surfaces, (ii) Kohn anomalies arising from electron-phonon coupling and (iii) novel plasmonic excitations associated to Dirac-cone fermions, as well as their eventual mutual interplay with other plasmon resonances related to topologically trivial electronic states. By selected case-study examples, here we show that HREELS can uniquely probe these phenomena in Dirac materials, thus validating its outstanding relevance and its irreplaceability in contemporary solid-state physics, thus paving the way for a renewed interest. In addition, recent technological upgrades enable the combination of HREELS as an add-on to photoemission apparatuses for parallel readout of energy and momentum of surface excitations. Open issues for theoretical modelling of HREELS related to the dependence on primary electron beam energy and scattering geometry are also critically presented.
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Affiliation(s)
- Antonio Politano
- Department of Physical and Chemical Sciences, University of L'Aquila, via Vetoio, 67100 L'Aquila, Abruzzo, Italy. .,CNR-IMM Istituto per la Microelettronica e Microsistemi, VIII strada 5, I-95121 Catania, Italy
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41
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Ding H, Liu H, Chu W, Wu C, Xie Y. Structural Transformation of Heterogeneous Materials for Electrocatalytic Oxygen Evolution Reaction. Chem Rev 2021; 121:13174-13212. [PMID: 34523916 DOI: 10.1021/acs.chemrev.1c00234] [Citation(s) in RCA: 95] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electrochemical water splitting for hydrogen generation is a promising pathway for renewable energy conversion and storage. One of the most important issues for efficient water splitting is to develop cost-effective and highly efficient electrocatalysts to drive sluggish oxygen-evolution reaction (OER) at the anode side. Notably, structural transformation such as surface oxidation of metals or metal nonoxide compounds and surface amorphization of some metal oxides during OER have attracted growing attention in recent years. The investigation of structural transformation in OER will contribute to the in-depth understanding of accurate catalytic mechanisms and will finally benefit the rational design of catalytic materials with high activity. In this Review, we provide an overview of heterogeneous materials with obvious structural transformation during OER electrocatalysis. To gain insight into the essence of structural transformation, we summarize the driving forces and critical factors that affect the transformation process. In addition, advanced techniques that are used to probe chemical states and atomic structures of transformed surfaces are also introduced. We then discuss the structure of active species and the relationship between catalytic performance and structural properties of transformed materials. Finally, the challenges and prospects of heterogeneous OER electrocatalysis are presented.
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Affiliation(s)
- Hui Ding
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Hongfei Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Wangsheng Chu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Changzheng Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230026, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.,Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230026, P. R. China
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42
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Singh D, Raj KK, Azad UP, Pandey R. In situ transformed three heteroleptic Co(II)-MOFs as potential electrocatalysts for the electrochemical oxygen evolution reaction. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.139117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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43
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Xu Z, Hou B, Zhao F, Cai Z, Shi H, Liu Y, Hill CL, Musaev DG, Mecklenburg M, Cronin SB, Lian T. Nanoscale TiO 2 Protection Layer Enhances the Built-In Field and Charge Separation Performance of GaP Photoelectrodes. NANO LETTERS 2021; 21:8017-8024. [PMID: 34569798 DOI: 10.1021/acs.nanolett.1c02257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanoscale oxide layer protected semiconductor photoelectrodes show enhanced stability and performance for solar fuels generation, although the mechanism for the performance enhancement remains unclear due to a lack of understanding of the microscopic interfacial field and its effects. Here, we directly probe the interfacial fields at p-GaP electrodes protected by n-TiO2 and its effect on charge carriers by transient reflectance spectroscopy. Increasing the TiO2 layer thickness from 0 to 35 nm increases the field in the GaP depletion region, enhancing the rate and efficiency of interfacial electron transfer from the GaP to TiO2 on the ps time scale as well as retarding interfacial recombination on the microsecond time scale. This study demonstrates a general method for providing a microscopic view of the photogenerated charge carrier's pathway and loss mechanisms from the bulk of the electrode to the long-lived separated charge at the interface that ultimately drives the photoelectrochemical reactions.
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Affiliation(s)
- Zihao Xu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Bingya Hou
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Fengyi Zhao
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Zhi Cai
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Haotian Shi
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Yawei Liu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Cherry L. Emerson Centre for Scientific Computation, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Matthew Mecklenburg
- Core Center of Excellence in Nano Imaging (CNI), University of South California, 814 Bloom Walk, Los Angeles, California 90089, United States
| | - Stephen B Cronin
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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44
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Wang M, Feng Z. Interfacial processes in electrochemical energy systems. Chem Commun (Camb) 2021; 57:10453-10468. [PMID: 34494049 DOI: 10.1039/d1cc01703a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Electrochemical energy systems such as batteries, water electrolyzers, and fuel cells are considered as promising and sustainable energy storage and conversion devices due to their high energy densities and zero or negative carbon dioxide emission. However, their widespread applications are hindered by many technical challenges, such as the low efficiency and poor long-term cyclability, which are mostly affected by the changes at the reactant/electrode/electrolyte interfaces. These interfacial processes involve ion/electron transfer, molecular/ion adsorption/desorption, and complex interface restructuring, which lead to irreversible modifications to the electrodes and the electrolyte. The understanding of these interfacial processes is thus crucial to provide strategies for solving those problems. In this review, we will discuss different interfacial processes at three representative interfaces, namely, solid-gas, solid-liquid, and solid-solid, in various electrochemical energy systems, and how they could influence the performance of electrochemical systems.
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Affiliation(s)
- Maoyu Wang
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA.
| | - Zhenxing Feng
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, Corvallis, Oregon, USA.
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45
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Chala SA, Tsai MC, Olbasa BW, Lakshmanan K, Huang WH, Su WN, Liao YF, Lee JF, Dai H, Hwang BJ. Tuning Dynamically Formed Active Phases and Catalytic Mechanisms of In Situ Electrochemically Activated Layered Double Hydroxide for Oxygen Evolution Reaction. ACS NANO 2021; 15:14996-15006. [PMID: 34515484 DOI: 10.1021/acsnano.1c05250] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The active phase and catalytic mechanisms of Ni-based layered double hydroxide (LDH) materials for oxygen evolution reaction (OER) have no common consensus and remain controversial. Moreover, engineering the site activity and the number of active sites of LDHs is an efficient approach to advance the OER activity, as the thickness and stacking structure of the LDHs layer limit the catalytic activity. This work presents an interesting in situ approach of tuning the site activity and number of active sites of NiMn-LDHs, which exhibit the superior OER performance (onset overpotential of 0.17 V and overpotential of 0.24 V at 10 mA cm-2). The fundamental mechanistic insights and active phases during the OER process are characterized by in operando techniques along with the computational density functional theory calculations, revealing that the Ni site constitutes the OER activity and the dynamically generated NiOOH moiety is the active phase. We also prove that Ni sites undergo a reversible oxidation state under the working conditions to create active NiOOH species which catalyze the water to generate oxygen. These findings suggest that the Ni(III) phase in NiMn-LDHs is the OER active site and Mn promotes the electronic properties of Ni sites. Utilizing in situ/in operando techniques and theoretical calculation, we find that the in situ intercalation of guest anions allows the expansion of the LDH layers and keeps the active NiOOH species under the oxidation state of +3 via electron coupling, which ultimately tunes the site populations and site activity toward the superior OER activity, respectively. This work thus targets to provide insight into strategies to design the next generation of highly active catalysts for water electrolysis and fuel cell technologies.
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Affiliation(s)
- Soressa Abera Chala
- NanoElectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Meng-Che Tsai
- NanoElectrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Bizualem Wakuma Olbasa
- NanoElectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Keseven Lakshmanan
- NanoElectrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Wei-Hsiang Huang
- NanoElectrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- National Synchrotron Radiation Research Center, Hsin-Chu 30076, Taiwan
| | - Wei-Nien Su
- NanoElectrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Yen-Fa Liao
- National Synchrotron Radiation Research Center, Hsin-Chu 30076, Taiwan
| | - Jyh-Fu Lee
- National Synchrotron Radiation Research Center, Hsin-Chu 30076, Taiwan
| | - Hongjie Dai
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Bing Joe Hwang
- NanoElectrochemistry Laboratory, Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- NanoElectrochemistry Laboratory, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- National Synchrotron Radiation Research Center, Hsin-Chu 30076, Taiwan
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46
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Reith L, Triana CA, Pazoki F, Amiri M, Nyman M, Patzke GR. Unraveling Nanoscale Cobalt Oxide Catalysts for the Oxygen Evolution Reaction: Maximum Performance, Minimum Effort. J Am Chem Soc 2021; 143:15022-15038. [PMID: 34499506 DOI: 10.1021/jacs.1c03375] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The oxygen evolution reaction (OER) is a key bottleneck step of artificial photosynthesis and an essential topic in renewable energy research. Therefore, stable, efficient, and economical water oxidation catalysts (WOCs) are in high demand and cobalt-based nanomaterials are promising targets. Herein, we tackle two key open questions after decades of research into cobalt-assisted visible-light-driven water oxidation: What makes simple cobalt-based precipitates so highly active-and to what extent do we need Co-WOC design? Hence, we started from Co(NO3)2 to generate a precursor precipitate, which transforms into a highly active WOC during the photocatalytic process with a [Ru(bpy)3]2+/S2O82-/borate buffer standard assay that outperforms state of the art cobalt catalysts. The structural transformations of these nanosized Co catalysts were monitored with a wide range of characterization techniques. The results reveal that the precipitated catalyst does not fully change into an amorphous CoOx material but develops some crystalline features. The transition from the precipitate into a disordered Co3O4 material proceeds within ca. 1 min, followed by further transformation into highly active disordered CoOOH within the first 10 min. Furthermore, under noncatalytic conditions, the precursor directly transforms into CoOOH. Moreover, fast precipitation and isolation afford a highly active precatalyst with an exceptional O2 yield of 91% for water oxidation with the visible-light-driven [Ru(bpy)3]2+/S2O82- assay, which outperforms a wide range of carefully designed Co-containing WOCs. We thus demonstrate that high-performance cobalt-based OER catalysts indeed emerge effortlessly from a self-optimization process favoring the formation of Co(III) centers in all-octahedral environments. This paves the way to new low-maintenance flow chemistry OER processes.
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Affiliation(s)
- Lukas Reith
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Carlos A Triana
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Faezeh Pazoki
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.,Chemical Engineering Department, University of Tehran, District 6, 16th Azar St., Enghelab Sq., Tehran 1417935840, Iran
| | - Mehran Amiri
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331-4003, United States
| | - Greta R Patzke
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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47
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Tang Z, Zhao S, Yang Y. Insight into Structural Evolution, Active Site and Stability of Heterogeneous Electrocatalysts. Angew Chem Int Ed Engl 2021; 61:e202110186. [PMID: 34490688 DOI: 10.1002/anie.202110186] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Indexed: 11/12/2022]
Abstract
The structure-activity correlation study of electrocatalysts is essential for improving conversion from electrical to chemical energy. Recently, increasing evidences obtained by operando characterization techniques reveal that the structural evolution of catalysts caused by the interplay with electric fields, electrolytes or reactants/intermediates brings about the formation of real active sites. Hence, it is time to summarize the structural evolution-related research advances and envisage their future developments. In this minireview, we first introduce the fundamental concepts associated with structural evolution ( e.g., catalyst, active site/center and stability/lifetime) and their relevance. Then, the multiple inducements of structural evolution and advanced operando characterizations are discussed. Lastly, a brief overview of structural evolution and its reversibility in heterogeneous electrocatalysis, especially for representative electrocatalytic oxygen evolution reaction (OER) and CO 2 reduction reaction (CO 2 RR), along with key challenges and opportunities, is highlighted.
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Affiliation(s)
- Zhiyong Tang
- National Center for Nanoscience and Technology, No 11, Beiyitiao, Zhongguancun, 100190, Beijing, CHINA
| | - Shenlong Zhao
- The University of Sydney, School of Chemical and Biomolecular Engineering, AUSTRALIA
| | - Yongchao Yang
- University of Sydney, School of Chemical and Biomolecular Engineering, AUSTRALIA
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48
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Deng X, Xu G, Zhang Y, Wang L, Zhang J, Li J, Fu X, Luo J. Understanding the Roles of Electrogenerated Co
3+
and Co
4+
in Selectivity‐Tuned 5‐Hydroxymethylfurfural Oxidation. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108955] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaohui Deng
- Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen China
| | - Ge‐Yang Xu
- College of Materials State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Fujian Key Laboratory of Advanced Materials College of Energy Xiamen University Xiamen China
| | - Yue‐Jiao Zhang
- College of Materials State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Fujian Key Laboratory of Advanced Materials College of Energy Xiamen University Xiamen China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen China
| | - Jiujun Zhang
- Institute for Sustainable Energy/College of Sciences Shanghai University Shanghai China
| | - Jian‐Feng Li
- College of Materials State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Fujian Key Laboratory of Advanced Materials College of Energy Xiamen University Xiamen China
| | - Xian‐Zhu Fu
- Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen China
| | - Jing‐Li Luo
- Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials College of Materials Science and Engineering Shenzhen University Shenzhen China
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49
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Cai X, Peng F, Luo X, Ye X, Zhou J, Lang X, Shi M. Understanding the Evolution of Cobalt-Based Metal-Organic Frameworks in Electrocatalysis for the Oxygen Evolution Reaction. CHEMSUSCHEM 2021; 14:3163-3173. [PMID: 34101996 DOI: 10.1002/cssc.202100851] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 06/03/2021] [Indexed: 06/12/2023]
Abstract
Metal-organic frameworks (MOFs) have attracted increasing attention as a promising electrode material for the oxygen evolution reaction (OER). Comprehending catalytic mechanisms in the OER process is of key relevance for the design of efficient catalysts. In this study, two types of Co based MOF with different organic ligands (ZIF-67 and CoBDC; BDC=1,4-benzenedicarboxylate) are synthesized as OER electrocatalysts and their electrochemical behavior is studied in alkaline solution. Physical characterization indicates that ZIF-67, with tetrahedral Co sites, transforms into α-Co(OH)2 on electrochemical activation, which provides continuous active sites in the following oxidation, whereas CoBDC, with octahedral sites, evolves into β-Co(OH)2 through hydrolysis, which is inert for the OER. Electrochemical characterization reveals that Co sites coordinated by nitrogen from imidazole ligands (Co-N coordination) are more inclined to electrochemical activation than Co-O sites. The successive exposure and accumulation of real active sites is responsible for the gradual increase in activity of ZIF-67 in OER. This work not only indicates that CoMOFs are promising OER electrocatalysts but also provides a reference system to understand how metal coordination in MOFs affects the OER process.
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Affiliation(s)
- Xiaowei Cai
- The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, P. R. China
| | - Fei Peng
- The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, P. R. China
| | - Xingyu Luo
- The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, P. R. China
| | - Xuejie Ye
- The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, P. R. China
| | - Junxi Zhou
- The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, P. R. China
| | - Xiaoling Lang
- Fujian Provincial Key Laboratory of Clean Energy Materials, Longyan, 364000, Fujian, P. R. China
| | - Meiqin Shi
- The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310032, Zhejiang, P. R. China
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50
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Deng X, Xu GY, Zhang YJ, Wang L, Zhang J, Li JF, Fu XZ, Luo JL. Understanding the Roles of Electrogenerated Co 3+ and Co 4+ in Selectivity-Tuned 5-Hydroxymethylfurfural Oxidation. Angew Chem Int Ed Engl 2021; 60:20535-20542. [PMID: 34288301 DOI: 10.1002/anie.202108955] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Indexed: 11/06/2022]
Abstract
The Co-based electrocatalyst is among the most promising candidates for electrochemical oxidation of 5-hydroxymethylfurfural (HMF). However, the intrinsic active sites and detailed mechanism of this catalyst remains unclear. We combine experimental evidence and a theoretical study to show that electrogenerated Co3+ and Co4+ species act as chemical oxidants but with distinct roles in selective HMF oxidation. It is found that Co3+ is only capable of oxidizing formyl group to produce carboxylate while Co4+ is required for the initial oxidation of hydroxyl group with significantly faster kinetics. As a result, the product distribution shows explicit dependence on the Co oxidation states and selective production of 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) and 2,5-furandicarboxylic acid (FDCA) are achieved by tuning the applied potential. This work offers essential mechanistic insight on Co-catalyzed organic oxidation reactions and might guide the design of more efficient electrocatalysts.
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Affiliation(s)
- Xiaohui Deng
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| | - Ge-Yang Xu
- College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Fujian Key Laboratory of Advanced Materials, College of Energy, Xiamen University, Xiamen, China
| | - Yue-Jiao Zhang
- College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Fujian Key Laboratory of Advanced Materials, College of Energy, Xiamen University, Xiamen, China
| | - Lei Wang
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| | - Jiujun Zhang
- Institute for Sustainable Energy/College of Sciences, Shanghai University, Shanghai, China
| | - Jian-Feng Li
- College of Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Fujian Key Laboratory of Advanced Materials, College of Energy, Xiamen University, Xiamen, China
| | - Xian-Zhu Fu
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
| | - Jing-Li Luo
- Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, China
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