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Svane KL, Rossmeisl J. Theoretical Optimization of Compositions of High-Entropy Oxides for the Oxygen Evolution Reaction. Angew Chem Int Ed Engl 2022; 61:e202201146. [PMID: 35225378 PMCID: PMC9314724 DOI: 10.1002/anie.202201146] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Indexed: 11/30/2022]
Abstract
High‐entropy oxides are oxides consisting of five or more metals incorporated in a single lattice, and the large composition space suggests that properties of interest can be readily optimised. For applications within catalysis, the different local atomic environments result in a distribution of binding energies for the catalytic intermediates. Using the oxygen evolution reaction on the rutile (110) surface as example, here we outline a strategy for the theoretical optimization of the composition. Density functional theory calculations performed for a limited number of sites are used to fit a model that predicts the reaction energies for all possible local atomic environments. Two reaction pathways are considered; the conventional pathway on the coordinatively unsaturated sites and an alternative pathway involving transfer of protons to a bridging oxygen. An explicit model of the surface is constructed to describe the interdependency of the two pathways and identify the composition that maximizes catalytic activity.
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Affiliation(s)
- Katrine L Svane
- Center for High Entropy Alloy Catalysis, Department of Chemistry, Copenhagen University, Universitetsparken 5, 2100, København K, Denmark
| | - Jan Rossmeisl
- Center for High Entropy Alloy Catalysis, Department of Chemistry, Copenhagen University, Universitetsparken 5, 2100, København K, Denmark
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Pedersen JK, Clausen CM, Krysiak OA, Xiao B, Batchelor TAA, Löffler T, Mints VA, Banko L, Arenz M, Savan A, Schuhmann W, Ludwig A, Rossmeisl J. Bayesian Optimization of High‐Entropy Alloy Compositions for Electrocatalytic Oxygen Reduction**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jack K. Pedersen
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry University of Copenhagen Universitetsparken 5 2100 København Ø Denmark
| | - Christian M. Clausen
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry University of Copenhagen Universitetsparken 5 2100 København Ø Denmark
| | - Olga A. Krysiak
- Center for Electrochemical Sciences (CES) Faculty of Chemistry and Biochemistry Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Bin Xiao
- Chair for Materials Discovery and Interfaces, Institute for Materials Faculty of Mechanical Engineering Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Thomas A. A. Batchelor
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry University of Copenhagen Universitetsparken 5 2100 København Ø Denmark
| | - Tobias Löffler
- Center for Electrochemical Sciences (CES) Faculty of Chemistry and Biochemistry Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
- Chair for Materials Discovery and Interfaces, Institute for Materials Faculty of Mechanical Engineering Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
- ZGH Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Vladislav A. Mints
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry, Biochemistry and Pharmaceutical Sciences University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Lars Banko
- Chair for Materials Discovery and Interfaces, Institute for Materials Faculty of Mechanical Engineering Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Matthias Arenz
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry University of Copenhagen Universitetsparken 5 2100 København Ø Denmark
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry, Biochemistry and Pharmaceutical Sciences University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Alan Savan
- Chair for Materials Discovery and Interfaces, Institute for Materials Faculty of Mechanical Engineering Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Wolfgang Schuhmann
- Center for Electrochemical Sciences (CES) Faculty of Chemistry and Biochemistry Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Alfred Ludwig
- Chair for Materials Discovery and Interfaces, Institute for Materials Faculty of Mechanical Engineering Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
- ZGH Ruhr University Bochum Universitätsstrasse 150 44780 Bochum Germany
| | - Jan Rossmeisl
- Center for High Entropy Alloy Catalysis (CHEAC) Department of Chemistry University of Copenhagen Universitetsparken 5 2100 København Ø Denmark
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Pedersen JK, Clausen CM, Krysiak OA, Xiao B, Batchelor TAA, Löffler T, Mints VA, Banko L, Arenz M, Savan A, Schuhmann W, Ludwig A, Rossmeisl J. Bayesian Optimization of High-Entropy Alloy Compositions for Electrocatalytic Oxygen Reduction*. Angew Chem Int Ed Engl 2021; 60:24144-24152. [PMID: 34506069 PMCID: PMC8596574 DOI: 10.1002/anie.202108116] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/24/2021] [Indexed: 11/17/2022]
Abstract
Active, selective and stable catalysts are imperative for sustainable energy conversion, and engineering materials with such properties are highly desired. High‐entropy alloys (HEAs) offer a vast compositional space for tuning such properties. Too vast, however, to traverse without the proper tools. Here, we report the use of Bayesian optimization on a model based on density functional theory (DFT) to predict the most active compositions for the electrochemical oxygen reduction reaction (ORR) with the least possible number of sampled compositions for the two HEAs Ag‐Ir‐Pd‐Pt‐Ru and Ir‐Pd‐Pt‐Rh‐Ru. The discovered optima are then scrutinized with DFT and subjected to experimental validation where optimal catalytic activities are verified for Ag–Pd, Ir–Pt, and Pd–Ru binary alloys. This study offers insight into the number of experiments needed for optimizing the vast compositional space of multimetallic alloys which has been determined to be on the order of 50 for ORR on these HEAs.
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Affiliation(s)
- Jack K Pedersen
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
| | - Christian M Clausen
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
| | - Olga A Krysiak
- Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Bin Xiao
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Thomas A A Batchelor
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
| | - Tobias Löffler
- Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.,Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.,ZGH, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Vladislav A Mints
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Lars Banko
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Matthias Arenz
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark.,Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Alan Savan
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Wolfgang Schuhmann
- Center for Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Alfred Ludwig
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.,ZGH, Ruhr University Bochum, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Jan Rossmeisl
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København Ø, Denmark
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Löffler T, Ludwig A, Rossmeisl J, Schuhmann W. What Makes High-Entropy Alloys Exceptional Electrocatalysts? Angew Chem Int Ed Engl 2021; 60:26894-26903. [PMID: 34436810 PMCID: PMC9292432 DOI: 10.1002/anie.202109212] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Indexed: 12/17/2022]
Abstract
The formation of a vast number of different multielement active sites in compositionally complex solid solution materials, often more generally termed high‐entropy alloys, offers new and unique concepts in catalyst design, which mitigate existing limitations and change the view on structure–activity relations. We discuss these concepts by summarising the currently existing fundamental knowledge and critically assess the chances and limitations of this material class, also highlighting design strategies. A roadmap is proposed, illustrating which of the characteristic concepts could be exploited using which strategy, and which breakthroughs might be possible to guide future research in this highly promising material class for (electro)catalysis.
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Affiliation(s)
- Tobias Löffler
- Analytical Chemistry - Center For Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.,Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.,Center for Interface-Dominated High-Performance Materials (ZGH), Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - Alfred Ludwig
- Chair for Materials Discovery and Interfaces, Institute for Materials, Faculty of Mechanical Engineering, Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.,Center for Interface-Dominated High-Performance Materials (ZGH), Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - Jan Rossmeisl
- Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, København, Denmark
| | - Wolfgang Schuhmann
- Analytical Chemistry - Center For Electrochemical Sciences (CES), Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany
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