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Guan J, Dong D, Khan NA, Zheng Y. Emerging Pt-based intermetallic nanoparticles for the oxygen reduction reaction. Chem Commun (Camb) 2024. [PMID: 38264768 DOI: 10.1039/d3cc05611b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
The advancement of highly efficient and enduring platinum (Pt)-based electrocatalysts for the oxygen reduction reaction (ORR) is a critical determinant to enable broad utilization of clean energy conversion technologies. Pt-based intermetallic electrocatalysts offer durability and superior ORR activity over their traditional analogues due to their definite stoichiometry, ordered and extended structures, and favourable enthalpy of formation. With the advent in new synthetic methods, Pt-based intermetallic nanoparticles as a new class of advanced electrocatalysts have been studied extensively in recent years. This review discusses the preparation principles, representative preparation methods of Pt-based intermetallics and their applications in the ORR. Our review is focused on L10 Pt-based intermetallics which have gained tremendous interest recently due to their larger surface strain and enhanced M(3d)-Pt(5d) orbital coupling, particularly in the crystallographic c-axis direction. Additionally, we discuss future research directions to further improve the efficiency of Pt-based intermetallic electrocatalysts with the intention of stimulating increased research ventures in this domain.
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Affiliation(s)
- Jingyu Guan
- China Nuclear Power Engineering Co., Ltd, Beijing 100840, China.
| | - Duo Dong
- China Nuclear Power Engineering Co., Ltd, Beijing 100840, China.
| | - Niaz Ali Khan
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
| | - Yong Zheng
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, P. R. China.
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2
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Sun M, Gong S, Li Z, Huang H, Chen Y, Niu Z. Terrace-Rich Ultrathin PtCu Surface on Earth-Abundant Metal for Oxygen Reduction Reaction. ACS NANO 2023; 17:19421-19430. [PMID: 37721808 DOI: 10.1021/acsnano.3c07863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
The activity and stability of the platinum electrode toward the oxygen reduction reaction are size-dependent. Although small nanoparticles have high Pt utilization, the undercoordinated Pt sites on their surface are assumed to have too strong oxygen binding strength, thus often leading to compromised activity and surface instability. Herein, we report an extended nanostructured PtCu ultrathin surface to reduce the number of low-coordination sites without sacrificing the electrochemical active surface area (ECSA). The surface shows (111)-oriented characteristics, as proven by electrochemical probe reactions and spectroscopies. The PtCu surface brings over an order of magnitude increase in specific activity relative to commercial Pt/C and nearly 4-fold enhancement in ECSA compared to traditional thin films. Moreover, due to the weak absorption of air impurities (e.g., SO2, NO, CO) on highly coordinated sites, the catalyst displays enhanced contaminant tolerance compared with nanoparticulate Pt/C. This work promises a broad screening of extended nanostructured surface catalysts for electrochemical conversions.
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Affiliation(s)
- Mingze Sun
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Shuyan Gong
- Department of Chemistry Analytical Instrumentation Center, Capital Normal University, Beijing, 100048, China
| | - Zhengwen Li
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Helai Huang
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Yanjun Chen
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhiqiang Niu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
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3
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Calle-Vallejo F. The ABC of Generalized Coordination Numbers and Their Use as a Descriptor in Electrocatalysis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2207644. [PMID: 37102632 PMCID: PMC10369287 DOI: 10.1002/advs.202207644] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/08/2023] [Indexed: 06/19/2023]
Abstract
The quest for enhanced electrocatalysts can be boosted by descriptor-based analyses. Because adsorption energies are the most common descriptors, electrocatalyst design is largely based on brute-force routines that comb materials databases until an energetic criterion is verified. In this review, it is shown that an alternative is provided by generalized coordination numbers (denoted by CN ¯ $\overline {{\rm{CN}}} $ or GCN), an inexpensive geometric descriptor for strained and unstrained transition metals and some alloys. CN ¯ $\overline {{\rm{CN}}} $ captures trends in adsorption energies on both extended surfaces and nanoparticles and is used to elaborate structure-sensitive electrocatalytic activity plots and selectivity maps. Importantly, CN ¯ $\overline {{\rm{CN}}} $ outlines the geometric configuration of the active sites, thereby enabling an atom-by-atom design, which is not possible using energetic descriptors. Specific examples for various adsorbates (e.g., *OH, *OOH, *CO, and *H), metals (e.g., Pt and Cu), and electrocatalytic reactions (e.g., O2 reduction, H2 evolution, CO oxidation, and reduction) are presented, and comparisons are made against other descriptors.
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Affiliation(s)
- Federico Calle-Vallejo
- Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (ETSF), Department of Advanced Materials and Polymers: Physics, Chemistry and Technology, University of the Basque Country UPV/EHU, 20018, Av. Tolosa 72, San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza de Euskadi 5, Bilbao, 48009, Spain
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4
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Gong S, Sun M, Lee Y, Becknell N, Zhang J, Wang Z, Zhang L, Niu Z. Bulk-like Pt(100)-oriented Ultrathin Surface: Combining the Merits of Single Crystals and Nanoparticles to Boost Oxygen Reduction Reaction. Angew Chem Int Ed Engl 2023; 62:e202214516. [PMID: 36420958 DOI: 10.1002/anie.202214516] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/14/2022] [Accepted: 11/24/2022] [Indexed: 11/25/2022]
Abstract
Single crystal surfaces with highly coordinated sites very often hold high specific activities toward oxygen reduction reaction (ORR) and others. Transposing their high specific activity to practical high-surface-area electrocatalysts remains challenging. Here, ultrathin Pt(100) alloy surface is constructed via epitaxial growth. The surface shows 3.1-6.9 % compressive strain and bulk-like characteristics as demonstrated by site-probe reactions and different spectroscopies. Its ORR activity exceeds that of bulk Pt3 Ni(100) and Pt(111) and presents a 19-fold increase in specific activity and a 13-fold increase in mass activity relative to commercial Pt/C. Moreover, the electrochemically active surface area (ECSA) is increased by 4-fold compared to traditional thin films (e.g. NSTF), which makes the catalyst more tolerant to voltage loss at high current densities under fuel cell operation. This work broadens the family of extended surface catalysts and highlights the knowledge-driven approach in the development of advanced electrocatalysts.
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Affiliation(s)
- Shuyan Gong
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P.R. China
| | - Mingze Sun
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P.R. China
| | - Yiyang Lee
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P.R. China
| | - Nigel Becknell
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Jiangwei Zhang
- Dalian National Laboratory for Clean Energy & State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P.R. China
| | - Zhongqi Wang
- Graduate school of science and technology, Tokyo Institute of Technology, Tokyo, 152-8550, Japan
| | - Liang Zhang
- Center for Combustion Energy, School of Vehicle and Mobility, State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, 100084, P.R. China
| | - Zhiqiang Niu
- State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P.R. China
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5
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Recent advances in understanding and design of efficient hydrogen evolution electrocatalysts for water splitting: A comprehensive review. Adv Colloid Interface Sci 2023; 311:102811. [PMID: 36436436 DOI: 10.1016/j.cis.2022.102811] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 10/10/2022] [Accepted: 11/08/2022] [Indexed: 11/21/2022]
Abstract
An unsustainable reliance on fossil fuels is the primary cause of the vast majority of greenhouse gas emissions, which in turn lead to climate change. Green hydrogen (H2), which may be generated by electrolyzing water with renewable power sources, is a possible substitute for fossil fuels. On the other hand, the increasing intricacy of hydrogen evolution electrocatalysts that are presently being explored makes it more challenging to integrate catalytic theories, catalytic fabrication procedures, and characterization techniques. This review will initially present the thermodynamics, kinetics, and associated electrical and structural characteristics for HER electrocatalysts before highlighting design approaches for the electrocatalysts. Secondly, an in-depth discussion regarding the rational design, synthesis, mechanistic insight, and performance improvement of electrocatalysts is centered on both the intrinsic and extrinsic influences. Thirdly, the most recent technological advances in electrocatalytic water-splitting approaches are described. Finally, the difficulties and possibilities associated with generating extremely effective HER electrocatalysts for water-splitting applications are discussed.
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6
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Ensemble effect for single-atom, small cluster and nanoparticle catalysts. Nat Catal 2022. [DOI: 10.1038/s41929-022-00839-7] [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]
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7
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Siron M, Andriuc O, Persson KA. Data-Driven Investigation of Tellurium-Containing Semiconductors for CO 2 Reduction: Trends in Adsorption and Scaling Relations. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:13224-13236. [PMID: 35983310 PMCID: PMC9377373 DOI: 10.1021/acs.jpcc.2c04810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 07/15/2022] [Indexed: 06/15/2023]
Abstract
Light-assisted conversion of CO2 into liquid fuels is one of several possible approaches to combating the rise of carbon dioxide emissions. Unfortunately, there are currently no known materials that are efficient, selective, or active enough to facilitate the photocatalytic CO2 reduction reaction (CO2RR) at an industrial scale. In this work, we employ density functional theory to explore potential tellurium-containing photocathodes for the CO2RR by observing trends in adsorption properties arising from over 350 *H, 200 *CO, and 110 *CHO surface-adsorbate structures spanning 39 surfaces of 11 materials. Our results reveal a scaling relationship between *CHO and *H chemisorption energies and charge transfer values, while the scaling relation (typically found in transition metals) between *CO and *CHO adsorption energies is absent. We hypothesize the scaling relation between *H and *CHO to be related to the lone electron located on the bonding carbon atom, while the lack of scaling relation in *CO we attribute to the ability of the lone pair on the C atom to form multiple bonding modes. We compute two predominant orbital-level interactions in the *CO-surface bonds (either using s or p orbitals) in addition to bonding modes involving both σ and π interactions using the Crystal Orbital Hamiltonian Population analysis. We demonstrate that bonds involving the C s orbital are more chemisorptive than the C p orbitals of CO. In general, chemisorption trends demonstrate decreased *H competition with respect to *CO adsorption and enhanced *CHO stability. Finally, we uncover simple element-specific design rules with Te, Se, and Ga sites showing increased competition and Zn, Yb, Rb, Br, and Cl sites showing decreased competition for hydrogen adsorption. We anticipate that these trends will help further screen these materials for potential CO2RR performance.
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Affiliation(s)
- Martin Siron
- Department
of Materials Science and Engineering, University
of California, Berkeley, California 94720, United States
- Liquid
Sunlight Alliance, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Oxana Andriuc
- Liquid
Sunlight Alliance, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Kristin A. Persson
- Department
of Materials Science and Engineering, University
of California, Berkeley, California 94720, United States
- Molecular
Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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8
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The dual role of the surface oxophilicity in the electro-oxidation of ethanol on nanostructured Pd/C in alkaline media. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Braunwarth L, Jung C, Jacob T. Exploring the Structure–Activity Relationship on Platinum Nanoparticles. Top Catal 2020. [DOI: 10.1007/s11244-020-01324-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractThe design of active and stable Pt-based nanoscale electrocatalysts for the oxygen reduction reaction (ORR) plays the central role in ameliorating the efficiency of proton exchange membrane fuel-cells towards future energy applications. On that front, theoretical studies have contributed significantly to this research area by gaining deeper insights and understanding of the ongoing processes. In this work, we present an approach capable of characterizing differently-shaped platinum nanoparticles undergoing thermally- and adsorbate-induced restructuring of the surface. Further, by performing ReaxFF-Grand Canonical Molecular Dynamics simulations we explored the water formation on these roughened (“realistic”) nanoparticles in a H2/O2 environment. Taking into consideration the coverage of oxygen-containing intermediates and occurring surface roughening the nanoparticles’ activities were explored. Hereby, we succeeded in locally resolving the water formation on the nanoparticles’ surfaces, allowing an allocation of the active sites for H2O production. We observed that exposed, low-coordinated sites as well as pit-shaped sites originating from roughening of vertices and edges are most active towards H2O formation.
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10
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Zhang W, Zhao J, Zhang J, Chen X, Zhang X, Yang F. Electronic Asymmetric Distribution of RhCu Bimetallic Nanocrystals for Enhancing Trifunctional Electrocatalysis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10299-10306. [PMID: 31990172 DOI: 10.1021/acsami.9b19980] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Developing efficient and durable multifunctional electrocatalysts for oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and oxygen reduction reaction (ORR) is of significant importance for many electrochemical energy devices, such as water electrolyzers, metal-air batteries, and fuel cells. Herein, the Rh-Cu alloy nanocrystals (NCs) are prepared with a simple wet-chemical approach. The tuning of morphology and the asymmetric electron distribution provide more efficient Rh-Cu bimetallic sites. Meanwhile, the incorporation of Cu into the Rh lattice could reduce the oxidation of Rh-Cu bimetallic sites and increase the catalytic stability. Under the tuning of the composition, the drastically enhanced electrocatalytic activities of HER, OER, and ORR are achieved in the Rh6Cu1 NCs with the cell voltage required to be as low as 1.55 V to accomplish an overall water splitting of 10 mA cm-2 and a maximum power density of 142.58 mW cm-2 for a zinc-air battery with good stability, representing the best trifunctional electrocatalysts for all we know. This work highlights the design and control of Rh-Cu NCs, which could be a potential alternative approach to trifunctional catalysis and further boosts the development of the bimetallic electrocatalysts in the energy conversion system.
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Affiliation(s)
- Wenqing Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Material Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, China
| | - Jun Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Material Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, China
| | - Jian Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Material Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, China
| | - Xijie Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Material Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, China
| | - Xin Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Material Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, China
| | - Fengchun Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry and Material Science, National Demonstration Center for Experimental Chemistry Education, Northwest University, Xi'an 710127, China
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11
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Chloroform Hydrodechlorination on Palladium Surfaces: A Comparative DFT Study on Pd(111), Pd(100), and Pd(211). Top Catal 2020. [DOI: 10.1007/s11244-019-01218-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Huo J, Pham HN, Cheng Y, Lin HH, Roling LT, Datye AK, Shanks BH. Deactivation and regeneration of carbon supported Pt and Ru catalysts in aqueous phase hydrogenation of 2-pentanone. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00163e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aqueous phase conversion of biomass-derived molecules requires development of catalysts and operating strategies that create viable operation for extended performance as necessitated for industrial applications.
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Affiliation(s)
- Jiajie Huo
- Department of Chemical and Biological Engineering
- Ames
- USA
- Center for Biorenewable Chemicals
- Iowa State University
| | - Hien N. Pham
- Center for Biorenewable Chemicals
- Iowa State University
- Ames
- USA
- Department of Chemical and Biological Engineering and Center for Microengineered Materials
| | - Yan Cheng
- Department of Chemical and Biological Engineering
- Ames
- USA
- Center for Biorenewable Chemicals
- Iowa State University
| | - Hsi-Hsin Lin
- Department of Chemical and Biological Engineering
- Ames
- USA
- Center for Biorenewable Chemicals
- Iowa State University
| | - Luke T. Roling
- Department of Chemical and Biological Engineering
- Ames
- USA
| | - Abhaya K. Datye
- Center for Biorenewable Chemicals
- Iowa State University
- Ames
- USA
- Department of Chemical and Biological Engineering and Center for Microengineered Materials
| | - Brent H. Shanks
- Department of Chemical and Biological Engineering
- Ames
- USA
- Center for Biorenewable Chemicals
- Iowa State University
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13
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The potential of zero total charge and electrocatalytic properties of Ru@Pt core-shell nanoparticles. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Song Y, Grabow LC. Activity Trends for Catalytic CO and NO Co-Oxidation at Low Temperature Diesel Emission Conditions. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b01905] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuying Song
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Lars C. Grabow
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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15
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The oxygen evolution reaction mechanism at Ir Ru1−O2 powders produced by hydrolysis synthesis. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.04.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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16
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Liu DJ, Thiel PA. Oxygen and sulfur adsorption on vicinal surfaces of copper and silver: Preferred adsorption sites. J Chem Phys 2018; 148:124706. [DOI: 10.1063/1.5021091] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Da-Jiang Liu
- Ames Laboratory of the USDOE, Ames, Iowa 50011, USA
| | - Patricia A. Thiel
- Ames Laboratory of the USDOE, Ames, Iowa 50011, USA
- Department of Chemistry, Iowa State University, Ames, Iowa 50011, USA
- Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA
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17
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Ramanan R, Danovich D, Mandal D, Shaik S. Catalysis of Methyl Transfer Reactions by Oriented External Electric Fields: Are Gold–Thiolate Linkers Innocent? J Am Chem Soc 2018; 140:4354-4362. [DOI: 10.1021/jacs.8b00192] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Rajeev Ramanan
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - David Danovich
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Debasish Mandal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala 147 004 Punjab, India
| | - Sason Shaik
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
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18
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Roling LT, Abild‐Pedersen F. Structure‐Sensitive Scaling Relations: Adsorption Energies from Surface Site Stability. ChemCatChem 2018. [DOI: 10.1002/cctc.201701841] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Luke T. Roling
- SUNCAT Center for Interface Science and Catalysis Stanford University 443 Via Ortega Stanford CA 94305 USA
| | - Frank Abild‐Pedersen
- SUNCAT Center for Interface Science and Catalysis SLAC National Accelerator Laboratory 2575 Sand Hill Road Menlo Park CA 94025 USA
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19
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20
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Ahn M, Cha IY, Cho J, Ham HC, Sung YE, Yoo SJ. Rhodium–Tin Binary Nanoparticle—A Strategy to Develop an Alternative Electrocatalyst for Oxygen Reduction. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02402] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Minjeh Ahn
- Fuel
Cell Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - In Young Cha
- Research
Park,
LG Chem, Daejeon, 34122, Republic of Korea
| | - Jinwon Cho
- Fuel
Cell Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Hyung Chul Ham
- Fuel
Cell Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Yung-Eun Sung
- School
of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Center
for Nanoparticle Research, Institute for Basic Science, Seoul, 08826, Republic of Korea
| | - Sung Jong Yoo
- Fuel
Cell Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
- Division of Energy & Environment Technology, KIST-School, Korea University of Science and Technology, Daejeon, 34113, Republic of Korea
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21
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Czelej K, Cwieka K, Colmenares JC, Kurzydlowski KJ. Insight on the Interaction of Methanol-Selective Oxidation Intermediates with Au- or/and Pd-Containing Monometallic and Bimetallic Core@Shell Catalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7493-7502. [PMID: 27373791 DOI: 10.1021/acs.langmuir.6b01906] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Using density functional theory (DFT), the interaction of crucial molecules involved in the selective partial oxidation of methanol to methyl formate (MF) with monometallic Au and Pd and bimetallic Au/Pd and Pd/Au core@shell catalysts is systematically investigated. The core@shell structures modeled in this study consist of Au(111) and Pd(111) cores covered by a monolayer of Pd and Au, respectively. Our results indicate that the adsorption strength of the molecules examined as a function of catalytic surface decreases in the order of Au/Pd(111) > Pd(111) > Au(111) > Pd/Au(111) and correlates well with the d-band center model. The preadsorption of oxygen is found to have a positive impact on the selective partial oxidation reaction because of the stabilization of CH3OH and HCHO on the catalyst surface and the simultaneous intensification of MF desorption. On the basis of a dynamical matrix approach combined with statistical thermodynamics, we propose a simple route for evaluating the Gibbs free energy of adsorption as a function of temperature. This method allows us to anticipate the relative temperature stability of molecules involved in the selective partial oxidation of methanol to MF in terms of catalytic surface.
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Affiliation(s)
- Kamil Czelej
- Faculty of Materials Science and Engineering, Warsaw University of Technology , 141Woloska Street, 02-507 Warsaw, Poland
| | - Karol Cwieka
- Faculty of Materials Science and Engineering, Warsaw University of Technology , 141Woloska Street, 02-507 Warsaw, Poland
| | - Juan Carlos Colmenares
- Institute of Physical Chemistry, Polish Academy of Sciences , 44/52 Kasprzaka Street, 01-224 Warsaw, Poland
| | - Krzysztof J Kurzydlowski
- Faculty of Materials Science and Engineering, Warsaw University of Technology , 141Woloska Street, 02-507 Warsaw, Poland
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22
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Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis. Nat Commun 2016; 7:11850. [PMID: 27353725 PMCID: PMC4931244 DOI: 10.1038/ncomms11850] [Citation(s) in RCA: 517] [Impact Index Per Article: 64.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 05/05/2016] [Indexed: 12/21/2022] Open
Abstract
Despite intense research in past decades, the lack of high-performance catalysts for fuel cell reactions remains a challenge in realizing fuel cell technologies for transportation applications. Here we report a facile strategy for synthesizing hierarchical platinum-cobalt nanowires with high-index, platinum-rich facets and ordered intermetallic structure. These structural features enable unprecedented performance for the oxygen reduction and alcohol oxidation reactions. The specific/mass activities of the platinum-cobalt nanowires for oxygen reduction reaction are 39.6/33.7 times higher than commercial Pt/C catalyst, respectively. Density functional theory simulations reveal that the active threefold hollow sites on the platinum-rich high-index facets provide an additional factor in enhancing oxygen reduction reaction activities. The nanowires are stable in the electrochemical conditions and also thermally stable. This work may represent a key step towards scalable production of high-performance platinum-based nanowires for applications in catalysis and energy conversion. Platinum-based nanowires are promising for fuel cell applications due to their high catalytic activity. Here the authors report on hierarchical platinum-cobalt nanowires with high-index facets showing specific/mass activities for oxygen reduction reaction 39.6/33.7 times higher than commercial Pt/C catalyst.
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23
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Silaghi MC, Comas-Vives A, Copéret C. CO2 Activation on Ni/γ–Al2O3 Catalysts by First-Principles Calculations: From Ideal Surfaces to Supported Nanoparticles. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00822] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Marius-Christian Silaghi
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Christophe Copéret
- Department of Chemistry and
Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
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24
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Ag–M (M: Ni, Co, Cu, Fe) bimetal catalysts prepared by galvanic deposition method for CO oxidation. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.11.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Liuzzi D, Pérez-Alonso FJ, García-García FJ, Calle-Vallejo F, Fierro JLG, Rojas S. Identifying the time-dependent predominance regimes of step and terrace sites for the Fischer–Tropsch synthesis on ruthenium based catalysts. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00476h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two types of active sites for CO dissociation exist in Ru particles. Step-edge sites deactivate during reaction.
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Affiliation(s)
- Dalia Liuzzi
- Instituto de Catálisis y Petroleoquímica
- Madrid
- Spain
| | | | | | | | | | - Sergio Rojas
- Instituto de Catálisis y Petroleoquímica
- Madrid
- Spain
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26
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Demiroglu I, Li ZY, Piccolo L, Johnston RL. A DFT study of molecular adsorption on Au–Rh nanoalloys. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01107a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory calculations are performed to investigate both mixing and adsorption properties of 38-atom and 79-atom Au–Rh nanoalloys at the nanoscale.
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Affiliation(s)
- Ilker Demiroglu
- School of Chemistry
- University of Birmingham
- Birmingham B15 2TT
- UK
| | - Z. Y. Li
- Nanoscale Physics Research Laboratory
- School of Physics and Astronomy
- University of Birmingham
- Birmingham B15 2TT
- UK
| | - Laurent Piccolo
- Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON)
- UMR 5256 CNRS & Université Claude Bernard Lyon 1
- F-69626 Villeurbanne
- France
| | - Roy L. Johnston
- School of Chemistry
- University of Birmingham
- Birmingham B15 2TT
- UK
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27
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Li L, Abild-Pedersen F, Greeley J, Nørskov JK. Surface Tension Effects on the Reactivity of Metal Nanoparticles. J Phys Chem Lett 2015; 6:3797-3801. [PMID: 26722873 DOI: 10.1021/acs.jpclett.5b01746] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present calculated adsorption energies of oxygen on gold and platinum clusters with up to 923 atoms (3 nm diameter) using density functional theory. We find that surface tension of the clusters induces a compression, which weakens the bonding of adsorbates compared with the bonding on extended surfaces. The effect is largest for close-packed surfaces and almost nonexistent on the more reactive steps and edges. The effect is largest at low coverage and decreases, even changing sign, at higher coverages where the strain changes from compressive to tensile. Quantum size effects also influence adsorption energies but only below a critical size of 1.5 nm for platinum and 2.5 nm for gold. We develop a model to describe the strain-induced size effects on adsorption energies, which is able to describe the influence of surface structure, adsorbate, metal, and coverage.
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Affiliation(s)
- Lin Li
- SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University , 443 Via Ortega, Stanford, California 94305, United States
| | - Frank Abild-Pedersen
- SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - Jeff Greeley
- School of Chemical Engineering, Purdue University , 480 Stadium Mall Drive, West Lafayette, Indianapolis 47907, United States
| | - Jens K Nørskov
- SUNCAT Center for Interface Science and Catalysis, 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, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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28
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Lysgaard S, Mýrdal JSG, Hansen HA, Vegge T. A DFT-based genetic algorithm search for AuCu nanoalloy electrocatalysts for CO₂ reduction. Phys Chem Chem Phys 2015; 17:28270-6. [PMID: 25924775 DOI: 10.1039/c5cp00298b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using a DFT-based genetic algorithm (GA) approach, we have determined the most stable structure and stoichiometry of a 309-atom icosahedral AuCu nanoalloy, for potential use as an electrocatalyst for CO2 reduction. The identified core-shell nano-particle consists of a copper core interspersed with gold atoms having only copper neighbors and a gold surface with a few copper atoms in the terraces. We also present an adsorbate-dependent correction scheme, which enables an accurate determination of adsorption energies using a computationally fast, localized LCAO-basis set. These show that it is possible to use the LCAO mode to obtain a realistic estimate of the molecular chemisorption energy for systems where the computation in normal grid mode is not computationally feasible. These corrections are employed when calculating adsorption energies on the Cu, Au and most stable mixed particles. This shows that the mixed Cu135@Au174 core-shell nanoalloy has a similar adsorption energy, for the most favorable site, as a pure gold nano-particle. Cu, however, has the effect of stabilizing the icosahedral structure because Au particles are easily distorted when adding adsorbates.
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Affiliation(s)
- Steen Lysgaard
- Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.
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29
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Calle-Vallejo F, Loffreda D, Koper MTM, Sautet P. Introducing structural sensitivity into adsorption–energy scaling relations by means of coordination numbers. Nat Chem 2015; 7:403-10. [DOI: 10.1038/nchem.2226] [Citation(s) in RCA: 474] [Impact Index Per Article: 52.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 03/02/2015] [Indexed: 12/24/2022]
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30
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Golibrzuch K, Shirhatti PR, Geweke J, Werdecker J, Kandratsenka A, Auerbach DJ, Wodtke AM, Bartels C. CO desorption from a catalytic surface: elucidation of the role of steps by velocity-selected residence time measurements. J Am Chem Soc 2015; 137:1465-75. [PMID: 25436871 DOI: 10.1021/ja509530k] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Directly measuring the rate of a surface chemical reaction remains a challenging problem. For example, even after more than 30 years of study, there is still no agreement on the kinetic parameters for one of the simplest surface reactions: desorption of CO from Pt(111). We present a new experimental technique for determining rates of surface reactions, the velocity-selected residence time method, and demonstrate it for thermal desorption of CO from Pt(111). We use UV−UV double resonance spectroscopy to record surface residence times at selected final velocities of the desorbing CO subsequent to dosing with a pulsed molecular beam. Velocity selection differentiates trapping-desorption from direct scattering and removes influences on the temporal profile arising from the velocity distribution of the desorbing CO. The kinetic data thus obtained are of such high quality that bi-exponential desorption kinetics of CO from Pt(111) can be clearly seen. We assign the faster of the two rate processes to desorption from (111) terraces, and the slower rate process to sequential diffusion from steps to terraces followed by desorption. The influence of steps, whose density may vary from crystal to crystal, accounts for the diversity of previously reported (single exponential) kinetics results. Using transition-state theory, we derive the binding energy of CO to Pt(111) terraces, D(0)(terr) (Pt−CO) = 34 ± 1 kcal/mol (1.47 ± 0.04 eV) for the low coverage limit (≤0.03 ML) where adsorbate−adsorbate interactions are negligible. This provides a useful benchmark for electronic structure theory of adsorbates on metal surfaces.
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Affiliation(s)
- Kai Golibrzuch
- Institute for Physical Chemistry, Georg-August University of Göttingen , 37073 Göttingen, Germany
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31
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Peng G, Mavrikakis M. Adsorbate diffusion on transition metal nanoparticles. NANO LETTERS 2015; 15:629-634. [PMID: 25422876 DOI: 10.1021/nl504119j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Diffusion of adsorbates on transition metal nanoparticles is a precursor process for heterogeneously catalyzed reactions, and as a result, an atomistic understanding of the diffusion mechanism is very important. We systematically studied adsorption and diffusion of atomic and diatomic species (H, C, N, O, CO, and NO) on nanometer-sized Pt and Cu nanoparticles with different sizes and shapes using density functional theory calculations. We show that nanoparticles bind adsorbates more strongly than the corresponding extended single crystal metal surfaces. We find that there is a Brønsted-Evans-Polanyi-type linear correlation between the transition state energy and the initial state energy for adsorbate diffusion across the edges of Pt and Cu nanoparticles. We further show that the barrier for adsorbate diffusion across the nanoparticles edges can be estimated by the binding energy of the adsorbate on the nanoparticles. These results provide useful insights for understanding diffusion-mediated chemical reactions catalyzed by transition metal nanoparticles, which are widely used in heterogeneous catalysis.
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Affiliation(s)
- Guowen Peng
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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32
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Zhang YJ, Peterson AA. Oxygen-induced changes to selectivity-determining steps in electrocatalytic CO2 reduction. Phys Chem Chem Phys 2015; 17:4505-15. [DOI: 10.1039/c4cp03783a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The state of the electrocatalyst surface—including the oxidation state of the catalyst and the presence of spectator species—is investigated on Cu surfaces with density functional theory in order to understand predicted ramifications on the selectivity of CO2 reduction between CH4 and CH3OH.
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Affiliation(s)
- Yin-Jia Zhang
- Department of Chemistry
- Brown University
- Providence
- USA
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33
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Zhang L, Henkelman G. Computational Design of Alloy-Core@Shell Metal Nanoparticle Catalysts. ACS Catal 2014. [DOI: 10.1021/cs501176b] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Liang Zhang
- Department of Chemistry and
the Institute for Computational Engineering and Sciences, The University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165, United States
| | - Graeme Henkelman
- Department of Chemistry and
the Institute for Computational Engineering and Sciences, The University of Texas at Austin, 1 University Station A5300, Austin, Texas 78712-0165, United States
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34
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Zhu W, Zhang YJ, Zhang H, Lv H, Li Q, Michalsky R, Peterson AA, Sun S. Active and selective conversion of CO2 to CO on ultrathin Au nanowires. J Am Chem Soc 2014; 136:16132-5. [PMID: 25380393 DOI: 10.1021/ja5095099] [Citation(s) in RCA: 432] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In this communication, we show that ultrathin Au nanowires (NWs) with dominant edge sites on their surface are active and selective for electrochemical reduction of CO2 to CO. We first develop a facile seed-mediated growth method to synthesize these ultrathin (2 nm wide) Au NWs in high yield (95%) by reducing HAuCl4 in the presence of 2 nm Au nanoparticles (NPs). These NWs catalyze CO2 reduction to CO in aqueous 0.5 M KHCO3 at an onset potential of -0.2 V (vs reversible hydrogen electrode). At -0.35 V, the reduction Faradaic efficiency (FE) reaches 94% (mass activity 1.84 A/g Au) and stays at this level for 6 h without any noticeable activity change. Density functional theory (DFT) calculations suggest that the excellent catalytic performance of these Au NWs is attributed both to their high mass density of reactive edge sites (≥16%) and to the weak CO binding on these sites. These ultrathin Au NWs are the most efficient nanocatalyst ever reported for electrochemical reduction of CO2 to CO.
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Affiliation(s)
- Wenlei Zhu
- Department of Chemistry and ‡School of Engineering, Brown University , Providence, Rhode Island 02912, United States
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35
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Childers DJ, Schweitzer NM, Shahari SMK, Rioux RM, Miller JT, Meyer RJ. Modifying structure-sensitive reactions by addition of Zn to Pd. J Catal 2014. [DOI: 10.1016/j.jcat.2014.07.016] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Howalt JG, Vegge T. Electrochemical ammonia production on molybdenum nitride nanoclusters. Phys Chem Chem Phys 2014; 15:20957-65. [PMID: 24213187 DOI: 10.1039/c3cp53160k] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Theoretical investigations of electrochemical production of ammonia at ambient temperature and pressure on nitrogen covered molybdenum nanoparticles are presented. Density functional theory calculations are used in combination with the computational hydrogen electrode approach to calculate the free energy profile for electrochemical protonation of N2 and N adatoms on cuboctahedral Mo13 nanoparticles. Pathways for electrochemical ammonia production via direct protonation of N adatoms and N2 admolecules with an onset potential as low as -0.5 V and generally lower than -0.8 V on both a nitrogen covered or a clean Mo nanoparticle. Calculations presented here show that nitrogen dissociation at either nitrogen vacancies on a nitrogen covered molybdenum particle or at a clean molybdenum particle is unlikely to occur under ambient conditions due to very high activation barriers of 1.8 eV. The calculations suggest that the nitrogen will be favored at the surface compared to hydrogen even at potentials of -0.8 V and the Faradaic losses due to HER should be low.
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Affiliation(s)
- J G Howalt
- Department of Energy Conversion and Storage, Technical University of Denmark, DK-4000 Roskilde, Denmark.
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37
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Calle-Vallejo F, Martínez JI, García-Lastra JM, Sautet P, Loffreda D. Fast Prediction of Adsorption Properties for Platinum Nanocatalysts with Generalized Coordination Numbers. Angew Chem Int Ed Engl 2014; 53:8316-9. [DOI: 10.1002/anie.201402958] [Citation(s) in RCA: 288] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 11/09/2022]
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38
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Calle-Vallejo F, Martínez JI, García-Lastra JM, Sautet P, Loffreda D. Fast Prediction of Adsorption Properties for Platinum Nanocatalysts with Generalized Coordination Numbers. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402958] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Zhang X, Lu G. Computational Design of Core/Shell Nanoparticles for Oxygen Reduction Reactions. J Phys Chem Lett 2014; 5:292-297. [PMID: 26270702 DOI: 10.1021/jz4024699] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A computational strategy to design core/shell nanoparticle catalysts for oxygen reduction reactions (ORRs) is proposed based on multiscale modeling. Using a quantum mechanics/molecular mechanics (QM/MM) coupling method, we have studied the ORR on Pt-Cu core/shell nanoparticles with the size ranging from 3 to 8 nm. We have calculated the oxygen adsorption energy on the nanoparticle surface (a descriptor for ORR activity) as a function of the nanoparticle size and thickness of the Pt shell. We find that the Pt-Cu core/shell nanoparticles exhibit higher ORR activities than flat Pt(111) surfaces, consistent with experimental observations. We predict that the diameter of the core/shell nanoparticles should be larger than 7 nm to reach the peak of ORR activities. By examining the effects of ligand, quantum confinement, and surface strain, we confirm that the strain plays the dominant role on ORR activities for the core/shell nanoparticles. A universal relation between the surface strain and the oxygen adsorption energy is established based on which one can computationally screen and design core/shell nanoparticle catalysts for superior ORR activities.
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Affiliation(s)
- Xu Zhang
- Department of Physics and Astronomy, California State University Northridge, Northridge, California 91330-8268, United States
| | - Gang Lu
- Department of Physics and Astronomy, California State University Northridge, Northridge, California 91330-8268, United States
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40
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Del Rosal I, Mercy M, Gerber IC, Poteau R. Ligand-field theory-based analysis of the adsorption properties of ruthenium nanoparticles. ACS NANO 2013; 7:9823-9835. [PMID: 24083468 DOI: 10.1021/nn403364p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The experimental design of improved nanocatalysts is usually based on shape control and is surface-ligand dependent. First-principle calculations can guide their design, both in terms of activity and selectivity, provided that theoretical descriptors can be defined and used in a prescreening process. As a consequence of the Sabatier principle and of the Brønsted-Evans-Polanyi relationship, an important prerequisite before optimizing the catalytic properties of nanoparticles is the knowledge of the selective adsorption strengths of reactants at their surface. We report here adsorption energies of X (H, CH3) and L (PH3, CO) ligands at the surface of bare ruthenium nanoclusters Run (n = 55 and 147) calculated at the DFT level. Their dependence on the topology of the adsorption sites as well as on the size and shape of the nanoparticles (NPs) is rationalized with local descriptors derived from the so-called d-band center model. Defining the descriptors involves the determination of the energy of effective d atomic orbitals for each surface atom. Such a ligand field theory-like model is in close relation with frontier molecular orbital theory, a cornerstone of rational chemical synthesis. The descriptors are depicted as color maps which straightforwardly yield possible reactivity spots. The adsorption map of a large spherical hcp cluster (Ru288) nicely confirms the remarkable activity of steps, the so-called B5 sites. The predictive character of this conceptual DFT approach should apply to other transition metal NPs and it could be a useful guide to the design of efficient nanocatalysts bearing sites with a specific activity.
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Affiliation(s)
- Iker Del Rosal
- Université de Toulouse, INSA, UPS, CNRS, LPCNO (IRSAMC) , 135 avenue de Rangueil, F-31077 Toulouse, France
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41
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Zhu W, Michalsky R, Metin Ö, Lv H, Guo S, Wright CJ, Sun X, Peterson AA, Sun S. Monodisperse Au nanoparticles for selective electrocatalytic reduction of CO2 to CO. J Am Chem Soc 2013; 135:16833-6. [PMID: 24156631 DOI: 10.1021/ja409445p] [Citation(s) in RCA: 696] [Impact Index Per Article: 63.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We report selective electrocatalytic reduction of carbon dioxide to carbon monoxide on gold nanoparticles (NPs) in 0.5 M KHCO3 at 25 °C. Among monodisperse 4, 6, 8, and 10 nm NPs tested, the 8 nm Au NPs show the maximum Faradaic efficiency (FE) (up to 90% at -0.67 V vs reversible hydrogen electrode, RHE). Density functional theory calculations suggest that more edge sites (active for CO evolution) than corner sites (active for the competitive H2 evolution reaction) on the Au NP surface facilitates the stabilization of the reduction intermediates, such as COOH*, and the formation of CO. This mechanism is further supported by the fact that Au NPs embedded in a matrix of butyl-3-methylimidazolium hexafluorophosphate for more efficient COOH* stabilization exhibit even higher reaction activity (3 A/g mass activity) and selectivity (97% FE) at -0.52 V (vs RHE). The work demonstrates the great potentials of using monodisperse Au NPs to optimize the available reaction intermediate binding sites for efficient and selective electrocatalytic reduction of CO2 to CO.
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Affiliation(s)
- Wenlei Zhu
- Department of Chemistry and ‡School of Engineering, Brown University , Providence, Rhode Island 02912, United States
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42
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43
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Peterson AA. Global Optimization of Adsorbate–Surface Structures While Preserving Molecular Identity. Top Catal 2013. [DOI: 10.1007/s11244-013-0161-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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