Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 26, Pages 10236-10240Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202003688
Keywords
hydrogen evolution reaction; kinetics; microkinetic modeling; thermodynamics; volcano plot
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Funding
- Alexander von Humboldt Foundation
- International Society of Electrochemistry (ISE)
- MDPI Catalysts
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Volcano analyses have been established as a standard tool in the field of electrocatalysis for assessing the performance of electrodes in a class of materials. The apex of the volcano curve, where the most active electrocatalysts are situated, is commonly defined by a hypothetical ideal material that binds its reaction intermediates thermoneutrally at zero overpotential, in accordance with Sabatier's principle. However, recent studies report a right shift of the apex in a volcano curve, in which the most active electrocatalysts bind their reaction intermediates endergonically rather than thermoneutrally at zero overpotential. Focusing on two-electron process, this Viewpoint addresses the question of how the definition of an optimum catalyst needs to be modified with respect to the requirements of Sabatier's principle when kinetic effects and the applied overpotential are included in the analysis.
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