Improvement of Time-zero Analysis Method in Activity Evaluation of Powder Electrocatalyst for Gas Evolution Reaction (Supporting Information)

In this study, we propose a highly accurate catalyst evaluation method by improving the time-zero analysis, which has been reported as an activity evaluation method for gas evolution powder catalysts. We refined the extrapolation approach to plot in this study’s time-zero analysis as an analytical method. The Tafel slopes obtained with this method for LaNiO3 (LNO) were found to be within the reported range, and the data was consistent in catalytic loading range of 2.5–3.3 mg-LNO cm−2. Using the improved time-zero analysis, the kinetic activity of the gas evolution powder catalyst is possible to be evaluated with high accuracy.

本研究中，我们通过优化零时间分析，提出了一种高度精确的催化剂评估方法，该方法已被报道为气态析出粉末催化剂的活性评价方法。我们对外推法进行了精炼，在本研究的零时间分析中将其作为一种分析方法进行绘制。采用该方法获得的LaNiO3（LNO）的Tafel斜率发现处于报道的范围内，且数据在催化负载范围为2.5–3.3 mg-LNO cm−2时保持一致。利用改进的零时间分析，气态析出粉末催化剂的动力学活性得以实现高精度评估。