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Goyal A, Louisia S, Moerland P, Koper MTM. Cooperative Effect of Cations and Catalyst Structure in Tuning Alkaline Hydrogen Evolution on Pt Electrodes. J Am Chem Soc 2024; 146:7305-7312. [PMID: 38451209 PMCID: PMC10958517 DOI: 10.1021/jacs.3c11866] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/09/2024] [Accepted: 02/09/2024] [Indexed: 03/08/2024]
Abstract
The kinetics of hydrogen evolution reaction (HER) in alkaline media, a reaction central to alkaline water electrolyzers, is not accurately captured by traditional adsorption-based activity descriptors. As a result, the exact mechanism and the main driving force for the water reduction or HER rate remain hotly debated. Here, we perform extensive kinetic measurements on the pH- and cation-dependent HER rate on Pt single-crystal electrodes in alkaline conditions. We find that cations interacting with Pt step sites control the HER activity, while they interact only weakly with Pt(111) and Pt(100) terraces and, therefore, cations do not affect HER kinetics on terrace sites. This is reflected by divergent activity trends as a function of pH as well as cation concentration on stepped Pt surfaces vs Pt surfaces that do not feature steps, such as Pt(111). We show that HER activity can be optimized by rationally tuning these step-cation interactions via selective adatom deposition at the steps and by choosing an optimal electrolyte composition. Our work shows that the catalyst and the electrolyte must be tailored in conjunction to achieve the highest possible HER activity.
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Affiliation(s)
- Akansha Goyal
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Sheena Louisia
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Pricilla Moerland
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Marc T. M. Koper
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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2
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Hoshi N, Nakamura M, Kubo R, Suzuki R. Enhanced oxygen reduction reaction on caffeine-modified platinum single-crystal electrodes. Commun Chem 2024; 7:23. [PMID: 38310168 PMCID: PMC10838267 DOI: 10.1038/s42004-024-01113-6] [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: 06/28/2023] [Accepted: 01/23/2024] [Indexed: 02/05/2024] Open
Abstract
Enhancing the activity of the oxygen reduction reaction (ORR) is crucial for fuel cell development, and hydrophobic species are known to increase the ORR activity. This paper reports that caffeine enhanced the specific ORR activity of Pt(111) 11-fold compared to that without caffeine in a 0.1 M HClO4 aqueous solution. Moreover, caffeine increased the ORR activity of Pt(110) 2.5-fold; however, the activity of Pt(100) was unaffected. The infrared (IR) band of PtOH (blocking species of the ORR) decreased for all the surfaces. Caffeine was adsorbed with its molecular plane perpendicular to the Pt(111) and Pt(110) surfaces and tilted relative to the Pt(100) surface. Thus, the effects of caffeine on the ORR activity can be rationalized by a decrease in PtOH coverage and the difference in adsorption geometry of caffeine.
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Affiliation(s)
- Nagahiro Hoshi
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba, 263-8522, Japan.
| | - Masashi Nakamura
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba, 263-8522, Japan
| | - Ryuta Kubo
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba, 263-8522, Japan
| | - Rui Suzuki
- Department of Applied Chemistry and Biotechnology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho Inage-ku, Chiba, 263-8522, Japan
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3
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Kubo R, Nakamura M, Hoshi N. Infrared reflection absorption spectroscopy of the adsorbed structures of a protic ionic liquid on the low-index planes of Pt. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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4
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Suzuki A, Nakamura M, Shimada H, Hoshi N. Effects of Hydrophobic Species on the Oxygen Reduction Reaction on the High-Index Planes of Pt3Fe. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-022-00795-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Zhang X, Truong-Phuoc L, Asset T, Pronkin S, Pham-Huu C. Are Fe–N–C Electrocatalysts an Alternative to Pt-Based Electrocatalysts for the Next Generation of Proton Exchange Membrane Fuel Cells? ACS Catal 2022. [DOI: 10.1021/acscatal.2c02146] [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)
- Xiong Zhang
- Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), UMR 7515 CNRS-Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex
02, France
| | - Lai Truong-Phuoc
- Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), UMR 7515 CNRS-Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex
02, France
| | - Tristan Asset
- Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), UMR 7515 CNRS-Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex
02, France
| | - Sergey Pronkin
- Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), UMR 7515 CNRS-Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex
02, France
| | - Cuong Pham-Huu
- Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), UMR 7515 CNRS-Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex
02, France
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6
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Hwang GS, Shin W, Yim G, Choi JH, Kim Y, Jang H, Kim Y. Morphology‐ and composition‐controlled silver‐containing rhodium nanoparticles for the oxygen reduction reaction. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Gyu Seop Hwang
- Department of Chemistry Kwangwoon University Seoul Republic of Korea
| | - Woojun Shin
- Department of Chemistry Kwangwoon University Seoul Republic of Korea
| | - Gyeonghye Yim
- Department of Chemistry Kwangwoon University Seoul Republic of Korea
| | - Jae Hyuk Choi
- Department of Chemistry Kwangwoon University Seoul Republic of Korea
| | - Young‐Kwan Kim
- Department of Chemistry Dongguk University‐Seoul Seoul Republic of Korea
| | - Hongje Jang
- Department of Chemistry Kwangwoon University Seoul Republic of Korea
| | - Yang‐Rae Kim
- Department of Chemistry Kwangwoon University Seoul Republic of Korea
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7
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Suzuki R, Nakamura M, Hoshi N. Oxygen reduction reaction on platinum single-crystal electrodes modified with protonic ionic liquid. Electrochem commun 2022. [DOI: 10.1016/j.elecom.2022.107337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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8
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Su Kim J, Keshari Mohanty S, Jin Kim S, Moon K, Jeong J, Young Kwon K, Shin HC, Hyun Park K, Deog Yoo H. Hanging meniscus configuration for characterizing oxygen-reduction electrocatalysts in highly concentrated electrolytes. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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9
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Suzuki A, Nakamura M, Hoshi N. Structural effects of the oxygen reduction reaction on the high index planes of Pt3Fe. Electrochem commun 2022. [DOI: 10.1016/j.elecom.2022.107235] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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10
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Sakaushi K, Watanabe A, Kumeda T, Shibuta Y. Fast-Decoding Algorithm for Electrode Processes at Electrified Interfaces by Mean-Field Kinetic Model and Bayesian Data Assimilation: An Active-Data-Mining Approach for the Efficient Search and Discovery of Electrocatalysts. ACS APPLIED MATERIALS & INTERFACES 2022; 14:22889-22902. [PMID: 35135188 DOI: 10.1021/acsami.1c21038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The microscopic origins of the activity and selectivity of electrocatalysts has been a long-lasting enigma since the 19th century. By applying an active-data-mining approach, employing a mean-field kinetic model and a statistical approach of Bayesian data assimilation, we demonstrate here a fast decoding to extract key properties in the kinetics of complicated electrode processes from current-potential profiles in experimental and literary data. As the proof-of-concept, kinetic parameters on the four-electron oxygen reduction reaction in the 0.1 M HClO4 solution (ORR: O2 + 4e- + 4H+ → 2H2O) of various platinum-based single-crystal electrocatalysts are extracted from our own experiments and third-party literature to investigate the microscopic electrode processes. Furthermore, data assimilation of the mean-field ORR model and experimental data is performed based on Bayesian inference for the inductive estimation of kinetic parameters, which sheds light on the dynamic behavior of kinetic parameters with respect to overpotential. This work shows that a fast-decoding algorithm based on a mean-field kinetic model and Bayesian data assimilation is a promising data-driven approach to extract key microscopic features of complicated electrode processes and therefore will be an important method toward building up advanced human-machine collaborations for the efficient search and discovery of high-performance electrochemical materials.
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Affiliation(s)
- Ken Sakaushi
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Aoi Watanabe
- Department of Materials Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Tomoaki Kumeda
- Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yasushi Shibuta
- Department of Materials Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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11
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Naito T, Shinagawa T, Nishimoto T, Takanabe K. Gas Crossover Regulation by Porosity-Controlled Glass Sheet Achieves Pure Hydrogen Production by Buffered Water Electrolysis at Neutral pH. CHEMSUSCHEM 2022; 15:e202102294. [PMID: 34907667 PMCID: PMC9306655 DOI: 10.1002/cssc.202102294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/10/2021] [Indexed: 06/14/2023]
Abstract
Near-neutral pH water electrolysis driven by renewable electricity can reduce the costs of clean hydrogen generation, but its low efficiency and gas crossover in industrially relevant conditions remain a challenge. Here, it was shown that electrolyte engineering could suppress the crossover of dissolved gases such as O2 by regulating their diffusion flux. In addition, a hydrophilized mechanically stable glass sheet was found to block the permeation of gas bubbles, further enhancing the purity of evolved gas from water electrolysis. This sheet had a lower resistance than conventional diaphragms such as Zirfon due to its high porosity and small thickness. A saturated K-phosphate solution at pH 7.2 was used as an electrolyte together with the hydrophilized glass sheet as a gas-separator. This led to a near-neutral pH water electrolysis with 100 mA cm-2 at a total cell voltage of 1.56 V with 99.9 % purity of produced H2 .
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Affiliation(s)
- Takahiro Naito
- Department of Chemical System EngineeringSchool of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyo113-8656Japan
| | - Tatsuya Shinagawa
- Department of Chemical System EngineeringSchool of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyo113-8656Japan
| | - Takeshi Nishimoto
- Department of Chemical System EngineeringSchool of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyo113-8656Japan
| | - Kazuhiro Takanabe
- Department of Chemical System EngineeringSchool of EngineeringThe University of Tokyo7-3-1 Hongo, Bunkyo-kuTokyo113-8656Japan
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12
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Effects of Surface Structures and Hydrophobic Species on the Oxygen Reduction Reaction Activity of Pt3Fe Single-Crystal Electrodes. Electrocatalysis (N Y) 2022. [DOI: 10.1007/s12678-021-00699-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Khater DZ, Amin RS, Mahmoud M, El-Khatib KM. Evaluation of mixed transition metal (Co, Mn, and Cu) oxide electrocatalysts anchored on different carbon supports for robust oxygen reduction reaction in neutral media. RSC Adv 2022; 12:2207-2218. [PMID: 35425267 PMCID: PMC8979034 DOI: 10.1039/d1ra07721j] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 01/09/2022] [Indexed: 11/23/2022] Open
Abstract
Oxygen reduction reaction (ORR) remains a pivotal factor in assessing the overall efficiency of energy conversion and storage technologies. A promising family of ORR electrocatalysts is mixed transition-metal oxides (MTMOs), which have recently gained a growing research interest. In this study, we developed MTMOs with different compositions (designated as AxB3−xO4; A = Cu, B = Co or Mn) anchored on two different carbon supports (activated carbon Vulcan XC-72 (AC) and graphene (G)) for catalyzing ORR in neutral media. Four different MTMO electrocatalysts (i.e., MnO2–CuO/AC, CoO–CuO/AC, CoO–CuO/G, and MnO2–CuO/G) were synthesized by a simple and scalable co-precipitation method. We documented the morphology and electrocatalytic properties of MTMO electrocatalysts using transmission and scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), energy dispersive X-ray (EDX), and electrochemical techniques. Generally, MTMOs exhibited remarkably high ORR electrocatalytic activity with MTMOs anchored on an activated carbon support outperforming their respective MTMOs anchored on a graphene support, highlighting the importance of the catalyst support in determining the overall ORR activity of electrocatalysts. MnO2–CuO/AC has the highest diffusion limiting current density (j) value of 4.2 mA cm−2 at −600 mV (vs. SHE), which is ∼1.1–1.7-fold higher than other tested electrocatalysts (i.e., 3.9, 3.5, and 2.7 mA cm−2 for CoO–CuO/AC, CoO–CuO/G, and MnO2–CuO/G, respectively), and slightly lower than Pt/C (5.1 mA cm−2) at the same potential value. Moreover, all electrocatalysts exhibited good linearity and parallelism of the Koutechy–Levich (K–L) plots, suggesting that ORR followed first-order reaction kinetics with the number of electrons involved being close to four. Benefiting from their remarkable ORR electrochemical activities and low cost, our results reveal that non-precious MTMOs are efficient enough to replace expensive Pt for broad applications in energy conversion and electrocatalysis in neutral media, such as microbial fuel cells. Mixed transition metal (Co, Mn, and Cu) oxide electrocatalysts anchored on different carbon supports for oxygen reduction reaction.![]()
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Affiliation(s)
- Dena Z Khater
- Chemical Engineering & Pilot Plant Department, Engineering Research Institute, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
| | - R S Amin
- Chemical Engineering & Pilot Plant Department, Engineering Research Institute, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
| | - Mohamed Mahmoud
- Water Pollution Research Department, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
| | - K M El-Khatib
- Chemical Engineering & Pilot Plant Department, Engineering Research Institute, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
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14
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15
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Colliard-Granero A, Batool M, Jankovic J, Jitsev J, Eikerling MH, Malek K, Eslamibidgoli MJ. Deep learning for the automation of particle analysis in catalyst layers for polymer electrolyte fuel cells. NANOSCALE 2021; 14:10-18. [PMID: 34846412 DOI: 10.1039/d1nr06435e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The rapidly growing use of imaging infrastructure in the energy materials domain drives significant data accumulation in terms of their amount and complexity. The applications of routine techniques for image processing in materials research are often ad hoc, indiscriminate, and empirical, which renders the crucial task of obtaining reliable metrics for quantifications obscure. Moreover, these techniques are expensive, slow, and often involve several preprocessing steps. This paper presents a novel deep learning-based approach for the high-throughput analysis of the particle size distributions from transmission electron microscopy (TEM) images of carbon-supported catalysts for polymer electrolyte fuel cells. A dataset of 40 high-resolution TEM images at different magnification levels, from 10 to 100 nm scales, was annotated manually. This dataset was used to train the U-Net model, with the StarDist formulation for the loss function, for the nanoparticle segmentation task. StarDist reached a precision of 86%, recall of 85%, and an F1-score of 85% by training on datasets as small as thirty images. The segmentation maps outperform models reported in the literature for a similar problem, and the results on particle size analyses agree well with manual particle size measurements, albeit at a significantly lower cost.
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Affiliation(s)
- André Colliard-Granero
- Theory and Computation of Energy Materials (IEK-13), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
- Department of Chemistry, University of Cologne, Greinstr. 4-6, 50939 Cologne, Germany
| | - Mariah Batool
- Department of Materials Science and Engineering, University of Connecticut, 97 North Eagleville Road, Unit 3136, Storrs, CT 06269-3136, USA
| | - Jasna Jankovic
- Department of Materials Science and Engineering, University of Connecticut, 97 North Eagleville Road, Unit 3136, Storrs, CT 06269-3136, USA
| | - Jenia Jitsev
- Julich Supercomputing Center, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Michael H Eikerling
- Theory and Computation of Energy Materials (IEK-13), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
- Chair of Theory and Computation of Energy Materials, Faculty of Georesources and Materials Engineering, RWTH Aachen University, Aachen 52062, Germany
| | - Kourosh Malek
- Theory and Computation of Energy Materials (IEK-13), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
- Centre for Advanced Simulation and Analytics (CASA), Simulation and Data Science Lab for Energy Materials (SDL-EM), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Mohammad J Eslamibidgoli
- Theory and Computation of Energy Materials (IEK-13), Institute of Energy and Climate Research, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
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16
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Briega-Martos V, Sarabia FJ, Climent V, Herrero E, Feliu JM. Cation Effects on Interfacial Water Structure and Hydrogen Peroxide Reduction on Pt(111). ACS MEASUREMENT SCIENCE AU 2021; 1:48-55. [PMID: 36785745 PMCID: PMC9836069 DOI: 10.1021/acsmeasuresciau.1c00004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The interface between the Pt(111) surface and several MeF/HClO4 (Me+ = Li+, Na+, or Cs+) aqueous electrolytes is investigated by means of cyclic voltammetry and laser-induced temperature jump experiments. Results point out that the effect of the electrolyte on the interfacial water structure is different depending on the nature of the metal alkali cation, with the values of the potential of maximum entropy (pme) following the order pme (Li+) < pme (Na+) < pme (Cs+). In addition, the hydrogen peroxide reduction reaction is studied under these conditions. This reaction is inhibited at low potentials as a consequence of the build up of negative charges on the electrode surface. The potential where this inhibition takes place (E inhibition) follows the same trend as the pme. These results evidence that the activity of an electrocatalytic reaction can depend to great extent on the structure of the interfacial water adlayer and that the latter can be modulated by the nature of the alkali metal cation.
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17
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Structural Effects on the Activity for the Oxygen Reduction Reaction on the High-Index Planes of Palladium in Alkali Solution. Electrocatalysis (N Y) 2021. [DOI: 10.1007/s12678-021-00681-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Improved Stability of Octahedral PtCu by Rh Doping for the Oxygen Reduction Reaction. ChemElectroChem 2021. [DOI: 10.1002/celc.202100207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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New insights into the hydrogen peroxide reduction reaction and its comparison with the oxygen reduction reaction in alkaline media on well-defined platinum surfaces. J Catal 2021. [DOI: 10.1016/j.jcat.2021.04.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Kalisz J, Nogala W, Adamiak W, Gocyla M, Girault HH, Opallo M. The Solvent Effect on H 2 O 2 Generation at Room Temperature Ionic Liquid|Water Interface. Chemphyschem 2021; 22:1352-1360. [PMID: 33909320 DOI: 10.1002/cphc.202100219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/26/2021] [Indexed: 12/15/2022]
Abstract
H2 O2 is a versatile chemical and can be generated by the oxygen reduction reaction (ORR) in proton donor solution in molecular solvents or room temperature ionic liquids (IL). We investigated this reaction at interfaces formed by eleven hydrophobic ILs and acidic aqueous solution as a proton source with decamethylferrocene (DMFc) as an electron donor. H2 O2 is generated in colorimetrically detectable amounts in biphasic systems formed by alkyl imidazolium hexafluorophosphate or tetraalkylammonium bis(trifluoromethylsulfonyl)imide ionic liquids. H2 O2 fluxes were estimated close to liquid|liquid interface by scanning electrochemical microscopy (SECM). Contrary to the interfaces formed by hydrophobic electrolyte solution in a molecular solvent, H2 O2 generation is followed by cation expulsion to the aqueous phase. Weak correlation between the H2 O2 flux and the difference between DMFc/DMFc+ redox potential and 2 electron ORR standard potential indicates kinetic control of the reaction.
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Affiliation(s)
- Justyna Kalisz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Wojciech Nogala
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Wojciech Adamiak
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Mateusz Gocyla
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Hubert H Girault
- Laboratoire d'Electrochimie Physique et Amaytique, Ecole Polytechnique Federale de Lausanne, EPFL, Valais, Wallis, Rue d'Industrie 17, 1950, Sion, Switzerland
| | - Marcin Opallo
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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21
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Torihata M, Nakamura M, Todoroki N, Wadayama T, Hoshi N. Activity for the ORR on Pt-Pd-Co ternary alloy electrodes is markedly affected by surface structure and composition. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.107007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Hoshi N, Nakamura M. Enhancement of the Activity for the Oxygen Reduction Reaction on Well-defined Single Crystal Electrodes of Pt by Hydrophobic Species. CHEM LETT 2021. [DOI: 10.1246/cl.200608] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nagahiro Hoshi
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Masashi Nakamura
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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23
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Zong C, Zhang C, Lin P, Yin J, Bai Y, Lin H, Ren B, Cheng JX. Real-time imaging of surface chemical reactions by electrochemical photothermal reflectance microscopy. Chem Sci 2020; 12:1930-1936. [PMID: 34163957 PMCID: PMC8179047 DOI: 10.1039/d0sc05132b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Traditional electrochemical measurements based on either current or potential responses only present the average contribution of an entire electrode's surface. Here, we present an electrochemical photothermal reflectance microscope (EPRM) in which a potential-dependent nonlinear photothermal signal is exploited to map an electrochemical process with sub-micron spatial resolution. By using EPRM, we are able to monitor the photothermal signal of a Pt electrode during the electrochemical reaction at an imaging speed of 0.3 s per frame. The potential-dependent photothermal signal, which is sensitive to the free electron density, clearly revealed the evolution of surface species on the Pt surface. Our results agreed well with the reported spectroelectrochemical techniques under similar conditions but with a much faster imaging speed. We further mapped the potential oscillation during the oxidation of formic acid on the Pt surface. The photothermal images from the Pt electrode well matched the potential change. This technique opens new prospects for real-time imaging of surface chemical reaction to reveal the heterogeneity of electrochemical reactivity, which enables broad applications to the study of catalysis, energy storage, and light harvest systems. The potential-dependent photothermal signal, which is sensitive to the free electron density, map the evolution of surface species on the electrode in real time. ![]()
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Affiliation(s)
- Cheng Zong
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA .,State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
| | - Chi Zhang
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA
| | - Peng Lin
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA
| | - Jiaze Yin
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA
| | - Yeran Bai
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA
| | - Haonan Lin
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA
| | - Bin Ren
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 China
| | - Ji-Xin Cheng
- Department of Biomedical Engineering, Department of Electrical & Computer Engineering, Department of Chemistry, Department of Physics, Photonics Center, Boston University Boston MA 02215 USA
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24
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Hersbach TJP, Ye C, Garcia AC, Koper MTM. Tailoring the Electrocatalytic Activity and Selectivity of Pt(111) through Cathodic Corrosion. ACS Catal 2020. [DOI: 10.1021/acscatal.0c04016] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Thomas J. P. Hersbach
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Chunmiao Ye
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Amanda C. Garcia
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Marc T. M. Koper
- Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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25
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WADA N, KUMEDA T, NAKAMURA M, HOSHI N. Effects of the Alkane on the Oxygen Reduction Reaction on Well-Defined Pt Surfaces. ELECTROCHEMISTRY 2020. [DOI: 10.5796/electrochemistry.20-00043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Naoya WADA
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Tomoaki KUMEDA
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Masashi NAKAMURA
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Nagahiro HOSHI
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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26
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Recent progress on oxygen and hydrogen peroxide reduction reactions on Pt single crystal electrodes. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(19)63325-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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27
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Gómez-Marín AM, Briega-Martos V, Feliu JM. Structure effects on electrocatalysts. Oxygen reduction on Te-modified Pt(111) surfaces: Site-blocking vs electronic effects. J Chem Phys 2020; 152:134702. [PMID: 32268759 DOI: 10.1063/5.0003125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this work, the oxygen reduction reaction (ORR) on tellurium-modified Pt(111) surfaces has been studied. Adsorption of Te adatoms on Pt(111) progressively shifts toward less positive values of both the ORR reaction onset and the half-wave potential in 0.1M HClO4 for 0 < θTe < 0.25. However, at θTe > 0.25, the ORR activity increases relative to the one at θTe < 0.25, but remains lower than that on clean Pt(111). Results were analyzed in light of simulations of kinetic currents as a function of θTe, calculated by employing a simple mean field model including both site blocking and electronic effects. Inside this framework, experimental data are best explained by considering that oxygenated Te species inhibit the ORR by either negatively modifying adsorption energies of reaction intermediates or combined site-blocking and electronic effects. A redox ORR catalysis due to redox properties of Te adatoms is discarded. Contrarily, in 0.05M H2SO4, a positive catalytic effect has been found, interpreted in terms of a competitive adsorption-desorption mechanism involving the replacement of adsorbed sulfate by Te adatoms. On the other hand, despite the strong site-blocking effect on Hads and OHads adsorption by Te adatoms, it appears that the reduced Te-Pt(111) adlayer does not inhibit the reaction, suggesting different active sites for Hads and OHads adsorption and for the rate-determining step of the ORR mechanism.
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Affiliation(s)
- Ana María Gómez-Marín
- Department of Chemistry, Division of Fundamental Sciences (IEF), Technological Institute of Aeronautics (ITA), São José dos Campos CEP: 12228-900, SP, Brazil
| | | | - Juan M Feliu
- Instituto de Electroquímica, Universidad de Alicante, Apt 99, E-03080 Alicante, Spain
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28
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Structural Effects on the Oxygen Reduction Reaction on Pt Single-Crystal Electrodes Modified with Melamine. Electrocatalysis (N Y) 2020. [DOI: 10.1007/s12678-020-00584-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Chen X, Ong WJ, Kong Z, Zhao X, Li N. Probing the active sites of site-specific nitrogen doping in metal-free graphdiyne for electrochemical oxygen reduction reactions. Sci Bull (Beijing) 2020; 65:45-54. [PMID: 36659068 DOI: 10.1016/j.scib.2019.10.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/21/2019] [Accepted: 10/08/2019] [Indexed: 01/21/2023]
Abstract
The development of highly active and low-cost catalysts for electrochemical reactions is one of the most attractive topics in the renewable energy technology. Herein, the site-specific nitrogen doping of graphdiyne (GDY) including grap-N, sp-N(I) and sp-N(II) GDY is systematically investigated as metal-free oxygen reduction electrocatalysts via density functional theory (DFT). Our results indicate that the doped nitrogen atom can significantly improve the oxygen (O2) adsorption activity of GDY through activating its neighboring carbon atoms. The free-energy landscape is employed to describe the electrochemical oxygen reduction reaction (ORR) in both O2 dissociation and association mechanisms. It is revealed that the association mechanism can provide higher ORR onset potential than dissociation mechanism on most of the substrates. Especially, sp-N(II) GDY exhibits the highest ORR electrocatalytic activity through increasing the theoretical onset potential to 0.76 V. This work provides an atomic-level insight for the electrochemical ORR mechanism on metal-free N-doped GDY.
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Affiliation(s)
- Xingzhu Chen
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
| | - Wee-Jun Ong
- School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor Darul Ehsan 43900, Malaysia; College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
| | - Zhouzhou Kong
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
| | - Xiujian Zhao
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
| | - Neng Li
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
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30
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Sakaushi K, Kumeda T, Hammes-Schiffer S, Melander MM, Sugino O. Advances and challenges for experiment and theory for multi-electron multi-proton transfer at electrified solid–liquid interfaces. Phys Chem Chem Phys 2020; 22:19401-19442. [DOI: 10.1039/d0cp02741c] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Understanding microscopic mechanism of multi-electron multi-proton transfer reactions at complexed systems is important for advancing electrochemistry-oriented science in the 21st century.
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Affiliation(s)
- Ken Sakaushi
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Ibaraki 305-0044
- Japan
| | - Tomoaki Kumeda
- Center for Green Research on Energy and Environmental Materials
- National Institute for Materials Science
- Ibaraki 305-0044
- Japan
| | | | - Marko M. Melander
- Nanoscience Center
- Department of Chemistry
- University of Jyväskylä
- Jyväskylä
- Finland
| | - Osamu Sugino
- The Institute of Solid State Physics
- the University of Tokyo
- Chiba 277-8581
- Japan
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31
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Dong JC, Su M, Briega-Martos V, Li L, Le JB, Radjenovic P, Zhou XS, Feliu JM, Tian ZQ, Li JF. Direct In Situ Raman Spectroscopic Evidence of Oxygen Reduction Reaction Intermediates at High-Index Pt(hkl) Surfaces. J Am Chem Soc 2019; 142:715-719. [DOI: 10.1021/jacs.9b12803] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jin-Chao Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
| | - Min Su
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
| | | | - Lang Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
| | - Jia-Bo Le
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
| | - Petar Radjenovic
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
| | - Xiao-Shun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Juan Miguel Feliu
- Instituto de Electroquímica, Universidad de Alicante, Alicante E-03080, Spain
| | - Zhong-Qun Tian
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
| | - Jian-Feng Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, Xiamen University, Xiamen 361005, China
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32
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33
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Devivaraprasad R, Nalajala N, Bera B, Neergat M. Electrocatalysis of Oxygen Reduction Reaction on Shape-Controlled Pt and Pd Nanoparticles-Importance of Surface Cleanliness and Reconstruction. Front Chem 2019; 7:648. [PMID: 31637231 PMCID: PMC6787902 DOI: 10.3389/fchem.2019.00648] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 09/10/2019] [Indexed: 01/04/2023] Open
Abstract
Shape-controlled precious metal nanoparticles have attracted significant research interest in the recent past due to their fundamental and scientific importance. Because of their crystallographic-orientation-dependent properties, these metal nanoparticles have tremendous implications in electrocatalysis. This review aims to discuss the strategies for synthesis of shape-controlled platinum (Pt) and palladium (Pd) nanoparticles and procedures for the surfactant removal, without compromising their surface structural integrity. In particular, the electrocatalysis of oxygen reduction reaction (ORR) on shape-controlled nanoparticles (Pt and Pd) is discussed and the results are analyzed in the context of that reported with single crystal electrodes. Accepted theories on the stability of precious metal nanoparticle surfaces under electrochemical conditions are revisited. Dissolution, reconstruction, and comprehensive views on the factors that contribute to the loss of electrochemically active surface area (ESA) of nanoparticles leading to an inevitable decrease in ORR activity are presented. The contribution of adsorbed electrolyte anions, in-situ generated adsorbates and contaminants toward the ESA reduction are also discussed. Methods for the revival of activity of surfaces contaminated with adsorbed impurities without perturbing the surface structure and its implications to electrocatalysis are reviewed.
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Affiliation(s)
- Ruttala Devivaraprasad
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Naresh Nalajala
- National Chemical Laboratory, Catalysis Division, Pune, India
| | - Bapi Bera
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Manoj Neergat
- Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Mumbai, India
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34
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Xie C, Niu Z, Kim D, Li M, Yang P. Surface and Interface Control in Nanoparticle Catalysis. Chem Rev 2019; 120:1184-1249. [DOI: 10.1021/acs.chemrev.9b00220] [Citation(s) in RCA: 286] [Impact Index Per Article: 57.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chenlu Xie
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Zhiqiang Niu
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Dohyung Kim
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mufan Li
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Peidong Yang
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
- Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli Energy Nanoscience Institute, Berkeley, California 94720, United States
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35
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Zheng H, Matseke MS, Munonde TS. The unique Pd@Pt/C core-shell nanoparticles as methanol-tolerant catalysts using sonochemical synthesis. ULTRASONICS SONOCHEMISTRY 2019; 57:166-171. [PMID: 31208611 DOI: 10.1016/j.ultsonch.2019.05.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/17/2019] [Accepted: 05/19/2019] [Indexed: 06/09/2023]
Abstract
Over the past decades, there were a few reports on the use of sonochemical method to prepare noble metals catalysts for fuel cells. However, the synthetic processes were conducted under high frequency (200 kHz)/long reaction time in most cases. In this work, Pd and PdxPt nanoparticles were prepared by sonochemical method under low frequency (20 kHz) in a shorter time (20-40 mins). In the first time, a sequentialsonochemical synthesis was explored to achieve a core/shell structure of PdxPt nanoparticles. Consequently, the unique core-shell structure was formed with two shells surrounding the Pd core. The Pd core was firstly grown. In the second step, the Pd2+ ion existing in the Pd core reduced simultaneously with Pt4+ ion in the solution as the first layer of PdPt alloy. Further, the Pt layer was formed subsequently. The Pd-based catalysts exhibited a superior ORR selective activity and exceptional methanol-tolerance property compared with the commercial Pt/C catalyst. In 0.5 M CH3OH + 0.5MH2SO4 solution, the best performance was achieved on Pd3Pt/C catalyst with increased overpotential of 24 mV. However, overpotentials was increased 174 mV on commercial Pt/C catalyst. The excellent performance of the Pd3Pt/C catalyst is ascribed to its combination of preferable growth of the Pd (1 1 1) plane, small particle size (∼4 nm), unique core/shell structure as well as the electronic effects between Pd and Pt. These results have demonstrated that the sequential ultrasonic synthesis is an effective method for the synthesis of binary/trinary catalysts in a green approach.
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Affiliation(s)
- Haitao Zheng
- Energy Centre, Council for Scientific and Industrial Research (CSIR), PO Box 395, Pretoria 0001, South Africa.
| | - Mphoma S Matseke
- Energy Centre, Council for Scientific and Industrial Research (CSIR), PO Box 395, Pretoria 0001, South Africa; University of Johannesburg, PO Box 524, Johannesburg 2006, South Africa
| | - Tshimangadzo S Munonde
- Energy Centre, Council for Scientific and Industrial Research (CSIR), PO Box 395, Pretoria 0001, South Africa; University of Johannesburg, PO Box 524, Johannesburg 2006, South Africa
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36
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Hoshi N, Saikawa K, Nakamura M. Structural effects on water molecules on the low index planes of Pt modified with alkyl amines and the correlation with the activity of the oxygen reduction reaction. Electrochem commun 2019. [DOI: 10.1016/j.elecom.2019.106536] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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37
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Gambu TG, Terranova U, Santos-Carballal D, Petersen MA, Jones G, van Steen E, de Leeuw NH. Thermal Properties and Segregation Behavior of Pt Nanowires Modified with Au, Ag, and Pd Atoms: A Classical Molecular Dynamics Study. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2019; 123:20522-20531. [PMID: 32064014 PMCID: PMC7011775 DOI: 10.1021/acs.jpcc.9b02730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 07/21/2019] [Indexed: 06/10/2023]
Abstract
Platinum nanowires (NWs) have been reported to be catalytically active toward the oxygen reduction reaction (ORR). The edge modification of Pt NWs with metals M (M = Au, Ag, or Pd) may have a positive impact on the overall ORR activity by facilitating diffusion of adsorbed oxygen, Oads, and hydroxyl groups, OHads, between the {001} and {111} terraces. In the present study, we have employed classical molecular dynamics simulations to investigate the segregation behavior of Au, Ag, and Pd decorating the edges of Pt NWs. We observe that, under vacuum conditions, Pd prefers to diffuse toward the core rather than stay on the NW surface. Ag and Au atoms are mobile at temperatures as low as 900 K; they remain on the surface but do not appear to be preferentially more stable at edge sites. To effect segregation of Au and Ag atoms toward the edge, we propose annealing in the presence of different reactive gas environments. Overall, our study suggests potential experimental steps required for the synthesis of Pt nanowires and nanoparticles with improved Oads and OHads interfacet diffusion rates and consequently an improved ORR activity.
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Affiliation(s)
- Thobani G. Gambu
- Catalysis
Institute, Department of Chemical Engineering, University of Cape Town, Private Bag
X3, Rondebosch 7701, South Africa
| | - Umberto Terranova
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
| | - David Santos-Carballal
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Materials
Modelling Centre, School of Physical and Mineral Sciences, University of Limpopo, Private Bag X1106, Sovenga 0727, South Africa
| | - Melissa A. Petersen
- Catalysis
Institute, Department of Chemical Engineering, University of Cape Town, Private Bag
X3, Rondebosch 7701, South Africa
| | - Glenn Jones
- Johnson
Matthey Technology Center, Blount’s
Court, Sonning Common, Reading RG4 9NH, United Kingdom
| | - Eric van Steen
- Catalysis
Institute, Department of Chemical Engineering, University of Cape Town, Private Bag
X3, Rondebosch 7701, South Africa
| | - Nora H. de Leeuw
- School
of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, United Kingdom
- Department
of Earth Sciences, Utrecht University, Princetonplein 8A, Utrecht 3584 CD, Netherlands
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38
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Zhao X, Gunji T, Kaneko T, Yoshida Y, Takao S, Higashi K, Uruga T, He W, Liu J, Zou Z. An Integrated Single-Electrode Method Reveals the Template Roles of Atomic Steps: Disturb Interfacial Water Networks and Thus Affect the Reactivity of Electrocatalysts. J Am Chem Soc 2019; 141:8516-8526. [PMID: 31050410 DOI: 10.1021/jacs.9b02049] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A method enabling the accurate and precise correlation between structures and properties is critical to the development of efficient electrocatalysts. To this end, we developed an integrated single-electrode method (ISM) that intimately couples electrochemical rotating disk electrodes, in situ/operando X-ray absorption fine structures, and aberration-corrected transmission electron microscopy on identical electrodes. This all-in-one method allows for the one-to-one, in situ/operando, and atomic-scale correlation between structures of electrocatalysts with their electrochemical reactivities, distinct from common methods that adopt multisamples separately for electrochemical and physical characterizations. Because the atomic step is one of the most fundamentally structural elements in electrocatalysts, we demonstrated the feasibility of ISM by exploring the roles of atomic steps in the reactivity of electrocatalysts. In situ and atomic-scale evidence shows that low-coordinated atomic steps not only generate reactive species at low potentials and strengthen surface contraction but also act as templates to disturb interfacial water networks and thus affect the reactivity of electrocatalysts. This template role interprets the long-standing puzzle regarding why high-index facets are active for the oxygen reduction reaction in acidic media. The ISM as a fundamentally new method for workflows should aid the study of many other electrocatalysts regarding their nature of active sites and operative mechanisms.
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Affiliation(s)
- Xiao Zhao
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Takao Gunji
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Takuma Kaneko
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Yusuke Yoshida
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Shinobu Takao
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Kotaro Higashi
- Innovation Research Center for Fuel Cells , The University of Electro-Communications , Chofugaoka, Chofu , Tokyo 182-8585 , Japan
| | - Tomoya Uruga
- Japan Synchrotron Radiation Research Institute , SPring-8 , Sayo , Hyogo 679-5198 , Japan
| | - Wenxiang He
- Jiangsu Key Laboratory for Nano Technology, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , 22 Hankou Road , Nanjing 210093 , P. R. China
| | - Jianguo Liu
- Jiangsu Key Laboratory for Nano Technology, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , 22 Hankou Road , Nanjing 210093 , P. R. China
| | - Zhigang Zou
- Jiangsu Key Laboratory for Nano Technology, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and Collaborative Innovation Center of Advanced Microstructures , Nanjing University , 22 Hankou Road , Nanjing 210093 , P. R. China
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García-Cruz L, Montiel V, Solla-Gullón J. Shape-controlled metal nanoparticles for electrocatalytic applications. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2017-0124] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Abstract
The application of shape-controlled metal nanoparticles is profoundly impacting the field of electrocatalysis. On the one hand, their use has remarkably enhanced the electrocatalytic activity of many different reactions of interest. On the other hand, their usage is deeply contributing to a correct understanding of the correlations between shape/surface structure and electrochemical reactivity at the nanoscale. However, from the point of view of an electrochemist, there are a number of questions that must be fully satisfied before the evaluation of the shaped metal nanoparticles as electrocatalysts including (i) surface cleaning, (ii) surface structure characterization, and (iii) correlations between particle shape and surface structure. In this chapter, we will cover all these aspects. Initially, we will collect and discuss about the different practical protocols and procedures for obtaining clean shaped metal nanoparticles. This is an indispensable requirement for the establishment of correct correlations between shape/surface structure and electrochemical reactivity. Next, we will also report how some easy-to-do electrochemical experiments including their subsequent analyses can enormously contribute to a detailed characterization of the surface structure of the shaped metal nanoparticles. At this point, we will remark that the key point determining the resulting electrocatalytic activity is the surface structure of the nanoparticles (obviously, the atomic composition is also extremely relevant) but not the particle shape. Finally, we will summarize some of the most significant advances/results on the use of these shaped metal nanoparticles in electrocatalysis covering a wide range of electrocatalytic reactions including fuel cell-related reactions (electrooxidation of formic acid, methanol and ethanol and oxygen reduction) and also CO2 electroreduction.
Graphical Abstract:
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40
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Mahata A, Nair AS, Pathak B. Recent advancements in Pt-nanostructure-based electrocatalysts for the oxygen reduction reaction. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00895k] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comprehensive evaluation of Pt-nanostructure-based electrocatalysts for the oxygen reduction reaction.
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Affiliation(s)
- Arup Mahata
- Discipline of Chemistry
- Indian Institute of Technology (IIT) Indore
- Indore
- India
| | - Akhil S. Nair
- Discipline of Chemistry
- Indian Institute of Technology (IIT) Indore
- Indore
- India
| | - Biswarup Pathak
- Discipline of Chemistry
- Indian Institute of Technology (IIT) Indore
- Indore
- India
- Discipline of Metallurgy Engineering and Materials Science
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41
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Garlyyev B, Xue S, Pohl MD, Reinisch D, Bandarenka AS. Oxygen Electroreduction at High-Index Pt Electrodes in Alkaline Electrolytes: A Decisive Role of the Alkali Metal Cations. ACS OMEGA 2018; 3:15325-15331. [PMID: 31458194 PMCID: PMC6643383 DOI: 10.1021/acsomega.8b00298] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 09/13/2018] [Indexed: 06/10/2023]
Abstract
Currently, platinum group metals play a central role in the electrocatalysis of the oxygen reduction reaction (ORR). Successful design and synthesis of new highly active materials for this process mainly rely on understanding of the so-called electrified electrode/electrolyte interface. It is widely accepted that the catalytic properties of this interface are only dependent on the electrode surface composition and structure. Therefore, there are limited studies about the effects of the electrolyte components on electrocatalytic activity. By now, however, several key points related to the electrolyte composition have become important for many electrocatalytic reactions, including the ORR. It is essential to understand how certain "spectator ions" (e.g., alkali metal cations) influence the electrocatalytic activity and what is the contribution of the electrode surface structure when, for instance, changing the pH of the electrolyte. In this work, the ORR activity of model stepped Pt [n(111) × (111)] surfaces (where n is equal to either 3 or 4 and denotes the atomic width of the (111) terraces of the Pt electrodes) was explored in various alkali metal (Li+, Na+, K+, Rb+, and Cs+) hydroxide solutions. The activity of these electrodes was unexpectedly strongly dependent not only on the surface structure but also on the type of the alkali metal cation in the solutions with the same pH, being the highest in potassium hydroxide solutions (i.e., K+ ≫ Na+ > Cs+ > Rb+ ≈ Li+). A possible reason for the observed ORR activity of Pt [n(111) × (111)] electrodes is discussed as an interplay between structural effects and noncovalent interactions between alkali metal cations and reaction intermediates adsorbed at active catalytic sites.
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Affiliation(s)
- Batyr Garlyyev
- Physik-Department
ECS, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
| | - Song Xue
- Physik-Department
ECS, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
| | - Marcus D. Pohl
- Physik-Department
ECS, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
| | - David Reinisch
- Physik-Department
ECS, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
| | - Aliaksandr S. Bandarenka
- Physik-Department
ECS, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
- Nanosystems
Initiative Munich (NIM), Schellingstraße 4, 80799 Munich, Germany
- Catalysis
Research Center TUM, Ernst-Otto-Fischer-Straße 1, 85748 Garching, Germany
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42
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HOSHI N, NAKAMURA M. Elucidation of Activity Enhancement Factors for the Oxygen Reduction Reaction on Platinum and Palladium Single Crystal Electrodes. ELECTROCHEMISTRY 2018. [DOI: 10.5796/electrochemistry.18-h0002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Nagahiro HOSHI
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Masashi NAKAMURA
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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43
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TAKEDA T, NAKAMURA M, HOSHI N. The Oxygen Reduction Reaction on Pt Single Crystal Electrodes Modified with Aromatic Organic Molecules. ELECTROCHEMISTRY 2018. [DOI: 10.5796/electrochemistry.17-00108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Tomoki TAKEDA
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Masashi NAKAMURA
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
| | - Nagahiro HOSHI
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University
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44
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Rück M, Bandarenka A, Calle-Vallejo F, Gagliardi A. Oxygen Reduction Reaction: Rapid Prediction of Mass Activity of Nanostructured Platinum Electrocatalysts. J Phys Chem Lett 2018; 9:4463-4468. [PMID: 30028631 DOI: 10.1021/acs.jpclett.8b01864] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Tailored Pt nanoparticle catalysts are promising candidates to accelerate the oxygen reduction reaction (ORR) in fuel cells. However, the search for active nanoparticle catalysts is hindered by the laborious effort of experimental synthesis and measurements. On the other hand, density functional theory-based approaches are still time-consuming and often not efficient. In this study, we introduce a computational model which enables rapid catalytic activity calculation of unstrained pure Pt nanoparticle electrocatalysts. Regarding particle size effects on Pt nanoparticles, experimental catalytic mass activities from previous studies are accurately reproduced by our computational model. Moreover, beyond available experiments, our computational model identifies potential enhancement in mass activity up to 190% over the experimentally detected maximum. Importantly, the rapid activity calculation enabled by our computational model may pave the way for extensive nanoparticle screening to expedite the search for improved electrocatalysts.
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Affiliation(s)
- Marlon Rück
- Department of Electrical and Computer Engineering , Technical University of Munich , 80333 München , Germany
| | | | - Federico Calle-Vallejo
- Department of Materials Science and Physical Chemistry, Institute of Theoretical and Computational Chemistry (IQTC) , University of Barcelona , 08028 Barcelona , Spain
| | - Alessio Gagliardi
- Department of Electrical and Computer Engineering , Technical University of Munich , 80333 München , Germany
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45
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Wang YH, Liang MM, Zhang YJ, Chen S, Radjenovic P, Zhang H, Yang ZL, Zhou XS, Tian ZQ, Li JF. Probing Interfacial Electronic and Catalytic Properties on Well-Defined Surfaces by Using In Situ Raman Spectroscopy. Angew Chem Int Ed Engl 2018; 57:11257-11261. [DOI: 10.1002/anie.201805464] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Ya-Hao Wang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Miao-Miao Liang
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
| | - Yue-Jiao Zhang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Shu Chen
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
| | - Petar Radjenovic
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Hua Zhang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Zhi-Lin Yang
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
| | - Xiao-Shun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials; College of Chemistry and Life Sciences; Zhejiang Normal University; Jinhua 321004 China
| | - Zhong-Qun Tian
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Jian-Feng Li
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
- Shenzhen Research Institute of Xiamen University; Shenzhen 518000 China
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46
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Wang YH, Liang MM, Zhang YJ, Chen S, Radjenovic P, Zhang H, Yang ZL, Zhou XS, Tian ZQ, Li JF. Probing Interfacial Electronic and Catalytic Properties on Well-Defined Surfaces by Using In Situ Raman Spectroscopy. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805464] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ya-Hao Wang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Miao-Miao Liang
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
| | - Yue-Jiao Zhang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Shu Chen
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
| | - Petar Radjenovic
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Hua Zhang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Zhi-Lin Yang
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
| | - Xiao-Shun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials; College of Chemistry and Life Sciences; Zhejiang Normal University; Jinhua 321004 China
| | - Zhong-Qun Tian
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
| | - Jian-Feng Li
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation; State Key Laboratory of Physical Chemistry of Solid Surfaces; i ChEM; College of Chemistry and Chemical Engineering; Xiamen University; Xiamen 361005 China
- Department of Physics; Research Institute for Biomimetics and Soft Matter; Xiamen University; Xiamen 361005 China
- Shenzhen Research Institute of Xiamen University; Shenzhen 518000 China
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47
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Wang H, An W, Liu X, Heath Turner C. Oxygen reduction reaction on Pt(1 1 1), Pt(2 2 1), and Ni/Au1Pt3(2 2 1) surfaces: Probing scaling relationships of reaction energetics and interfacial composition. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.03.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Bott-Neto JL, Ticianelli EA. Activity and Electrochemical Stability of Pt- and Pt2
Ni-α-WC/C Catalysts for the Oxygen Reduction Reaction in Acid Media. ChemElectroChem 2018. [DOI: 10.1002/celc.201800048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- José L. Bott-Neto
- Department of Physical Chemistry; São Carlos Institute of Chemistry - USP; Av. Trabalhador São-carlense 400 São Carlos, SP Brazil
| | - Edson A. Ticianelli
- Department of Physical Chemistry; São Carlos Institute of Chemistry - USP; Av. Trabalhador São-carlense 400 São Carlos, SP Brazil
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49
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Abstract
Abstract
Recent progresses in proton exchange membrane fuel cell electrocatalysts are reviewed in this article in terms of cathodic and anodic reactions with a focus on rational design. These designs are based around gaining active sites using model surface studies and include high-index faceted Pt and Pt-alloy nanocrystals for anodic electrooxidation reactions as well as Pt-based alloy/core–shell structures and carbon-based non-precious metal catalysts for cathodic oxygen reduction reactions (ORR). High-index nanocrystals, alloy nanoparticles, and support effects are highlighted for anodic catalysts, and current developments in ORR electrocatalysts with novel structures and different compositions are emphasized for cathodic catalysts. Active site structures, catalytic performances, and stability in fuel cells are also reviewed for carbon-based non-precious metal catalysts. In addition, further developmental perspectives and the current status of advanced fuel cell electrocatalysts are provided.
Graphical Abstract
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50
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Strasser P, Gliech M, Kuehl S, Moeller T. Electrochemical processes on solid shaped nanoparticles with defined facets. Chem Soc Rev 2018; 47:715-735. [PMID: 29354840 DOI: 10.1039/c7cs00759k] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This 2007 Chemistry Nobel prize update covers scientific advances of the past decade in our understanding of electrocatalytic processes on surfaces of nanoscale shape-controlled polyhedral solids. It is argued that the field of chemical reaction processes on solid surfaces has recently been paying increasing attention to the fundamental understanding of electrified solid-liquid interfaces and toward the operando study of the minute fraction of catalytically active, structurally dynamic non-equilibrium Taylor-type surface sites. Meanwhile, despite mounting evidence of acting as structural proxies in some cases, the concept of catalytic structure sensitivity of well-defined nanoscale solid surfaces continues to be a key organizing principle for the science of shape-controlled nanocrystals and, hence, constitutes a central recurring theme in this review. After addressing key aspects and recent progress in the wet-chemical synthesis of shaped nanocatalysts, three areas of electrocatalytic processes on solid shape-controlled nanocrystals of current scientific priority are discussed in more detail: the oxygen electroreduction on shape-controlled Pt-Ni polyhedra with its technological relevance for low temperature fuel cells, the CO2 electroreduction to hydrocarbons on Cu polyhedra and the puzzling interplay between chemical and structural effects, and the electrocatalytic oxygen evolution reaction from water on shaped transition metal oxides. The review closes with the conclusion that Surface Science and thermal catalysis, honored by Ertl's Nobel prize a decade ago, continue to show major repercussions on the emerging field of Interface Science.
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Affiliation(s)
- Peter Strasser
- The Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623 Berlin, Germany.
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