Department of Chemistry, Tarbiat Modares University, P.O. Box, 14115-175, Tehran, Iran.
ChemSusChem. 2023 Jun 9;16(11):e202202126. doi: 10.1002/cssc.202202126. Epub 2023 Apr 19.
The development of transition metal-based non-precious-metal electrocatalysts for energy storage and conversion systems has received a lot of interest recently. To further this subject in the proper way given the development of electrocatalysts, a fair comparison of their respective performance is necessary. This Review investigates the parameters used for the comparison of electrocatalyst activity. Significant evaluation criteria employed in electrochemical water splitting studies are the overpotential at defined current density usually at 10 mA per geometric surface area, Tafel slope, exchange current density, mass activity, specific activity and turnover frequency (TOF). This Review will discuss how to identify the specific activity and TOF by electrochemical and non-electrochemical methods to represent intrinsic activity as well as the benefits and uncertainties of each technique, ensuring that each method is applied correctly when calculating intrinsic activity metrics.
近年来，人们对用于储能和转换系统的过渡金属基非贵金属电催化剂的发展产生了浓厚的兴趣。为了在电催化剂发展的背景下以恰当的方式推进这一课题，有必要对它们各自的性能进行公平的比较。本综述探讨了用于比较电催化剂活性的参数。电化学水分解研究中采用的重要评价标准是在通常为每几何表面积 10 mA 的规定电流密度下的过电势、塔菲尔斜率、交换电流密度、质量活性、比活性和 turnover frequency（TOF）。本综述将讨论如何通过电化学和非电化学方法来确定比活性和 TOF，以表示内在活性，以及每种技术的优点和不确定性，从而确保在计算内在活性指标时正确应用每种方法。
