Exner Kai S
Sofia University, Faculty of Chemistry and Pharmacy, Department of Physical Chemistry, 1 James Bourchier Avenue, 1164, Sofia, Bulgaria.
Angew Chem Int Ed Engl. 2020 Jun 22;59(26):10236-10240. doi: 10.1002/anie.202003688. Epub 2020 May 7.
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.
火山分析已成为电催化领域评估一类材料中电极性能的标准工具。火山曲线的顶点是最活跃的电催化剂所在之处，通常根据萨巴蒂尔原理，由一种假设的理想材料定义，该材料在零过电位下以热中性方式结合其反应中间体。然而，最近的研究报告称，火山曲线的顶点向右移动，其中最活跃的电催化剂在零过电位下以吸热方式而非热中性方式结合其反应中间体。聚焦于双电子过程，本观点探讨了在分析中纳入动力学效应和施加的过电位时，如何根据萨巴蒂尔原理的要求修改最佳催化剂的定义这一问题。
