Meta-analysis of commercial Pt/C measurements for oxygen reduction reactions via data mining  

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

作　　者：Mingbo Ruan Jing Liu Ping Song Weilin Xu 阮明波;刘京;宋平;徐维林(中国科学院长春应用化学研究所,电分析化学国家重点实验室,吉林省先进低碳化学电源实验室,吉林长春130022;中国科学技术大学,安徽合肥230026)

机构地区：[1]State Key Laboratory of Electroanalytical Chemistry,Jilin Province Key Laboratory of Low Carbon Chemical Power,Changchun Institute of Applied Chemistry,Chinese Academy of Science,Changchun 130022,Jilin,China [2]University of Science and Technology of China,Hefei 230026,Anhui,China

出　　处：《Chinese Journal of Catalysis》2022年第1期116-121,共6页催化学报（英文）

基　　金：国家重点研发计划(2017YFE0197900,2018YFB1502302);国家杰出青年科学基金(21925205);国家自然科学基金(22072145,22005294,21733004,21633008,21721003);王宽诚教育基金.

摘　　要：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 20μg/cm^(2) 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.近几十年来,聚合物电解质膜燃料电池(PEMFC)因其在零排放汽车、固定式和便携式发电设备中的应用而得到迅速发展.燃料电池的阴极氧还原反应(ORR)和阳极氢氧化反应(HOR)常用的催化剂为Pt基催化剂,因此整个燃料电池系统的成本高昂.而ORR的反应速率比HOR慢得多,阴极上的Pt消耗量远高于阳极上.为了降低燃料电池Pt的用量,近年来,许多类型的非铂或低铂ORR电催化剂被报道作为传统Pt基催化剂的可能替代品,以降低成本促进燃料电池的大规模应用.为了评估新催化剂的ORR性能,一般来说,都是以最先进的商业Pt/C的ORR性能作为参考标准进行比较.最简单常用的方法是采用旋转盘电极测试技术,比较线性扫描曲线上极限扩散电流一半处的电位(半波电位E_(1/2)):半波电位越高,说明其ORR性能越好.众所周知,Pt/C催化剂的本征活性主要与其微观结构和组成有关,而不是与测试方案有关,理想情况下,不同实验室对相同类型的商用Pt/C的测量结果应该是相同的.然而,不同实验室采用的测试方案不同,所得的商业Pt/C的“表观”ORR性能差异巨大.显然,在不考虑不同实验室之间测试方案的微小差异的情况下,作为参比的Pt/C电催化剂的这种明显的性能差异使得来自不同实验室的不同催化剂之间的ORR性能的比较变得无序和不可靠.为解决此问题,需要一种标准的简单测试方案作为商业Pt/C甚至其他类型电催化剂的测试参考,以便在不同的实验室中获得易于重复的“表观”结果.本文通过对全球不同实验室的514篇参考文献进行数据挖掘并进行综合分析发现,同类型Pt/C参比的“表观”活性差异可能主要归因于测试方案的差异,如铂负载(μg/cm^(2))、玻碳电极的尺寸和线性扫描速率等.基于这些主要影响因素,本文重点分析了商业Pt/C的表观活性(E_(1/2))与测试方案中各因素之间的相关性.经初步分析发�

关 键 词：Oxygen reduction reaction Commercial Pt/C Deep-analysis Verification experiment 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]