基于数据挖掘对商业氧还原电催化剂 Pt/C 测试的综合分析

ABSTRACT The rotating disk electrode technique is commonly used for screening and characterizing the performance of electrocatalysts for the oxygen reduction reaction (ORR). However, a reliable performance comparison of different electrocatalysts from different labs remains a challenge because of the inconsistency in the measurement of commercial Pt/C. Commercial Pt/C has been adopted extensively as a reference for evaluating the ORR performance of a new electrocatalyst. However, the reported ORR performances of commercial Pt/C from different labs could be significantly different because of multiple factors. Herein, we conducted a meta-analysis of the ORR performance of commercial Pt/C via data mining of the literature. This revealed the optimal testing conditions for the most repeatable ORR performance, with commercial Pt/C in both acid and alkaline electrolytes; the optimal Pt loading was 20 μg/cm2 on a 4 mm glassy carbon working electrode. The value of 0.84 ± 0.03 V was suggested as the “Golden reference” of the commercial Pt/C (with Pt 20 wt%) ORR half-wave potential for the performance evaluation of other ORR catalysts in both acid and alkaline electrolytes. The conclusion obtained through the meta-analysis was confirmed by experiments. This study provides general guidance for a reliable measurement of the ORR performance of commercial Pt/C as a reference.