期刊
INORGANIC CHEMISTRY
卷 53, 期 19, 页码 9983-10002出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic500658x
关键词
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资金
- University of North Carolina
- Duke Energy Progress Environmental fellowship
- Department of Energy Office of Science Graduate Fellowship Program (DOE SCGF)
- ORISE-ORAU [DE-AC05-06OR23100]
The pursuit of solar fuels has motivated extensive research on molecular electrocatalysts capable of evolving hydrogen from protic solutions, reducing CO2, and oxidizing water. Determining accurate figures of merit for these catalysts requires the careful and appropriate application of electroanalytical techniques. This Viewpoint first briefly presents the fundamentals of cyclic voltammetry and highlights practical experimental considerations before focusing on the application of cyclic voltammetry for the characterization of electrocatalysts. Key metrics for comparing catalysts, including the overpotential (eta), potential for catalysis (E-cat), observed rate constant (k(obs)), and potential-dependent turnover frequency, are discussed. The cyclic voltammetric responses for a general electrocatalytic one-electron reduction of a substrate are presented along with methods to extract figures of merit from these data. The extension of this analysis to more complex electrocatalytic schemes, such as those responsible for H-2 evolution and CO2 reduction, is then discussed.
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