Optical High-Throughput Screening for Activity and Electrochemical Stability of Oxygen Reducing Electrode Catalysts for Fuel Cell Applications

被引：11
|
作者：
Dogan, C. [1 ]
Stoewe, K. [1 ]
Maier, W. F. [1 ]
机构：
[1] Univ Saarland, Lehrstuhl Tech Chem, D-66123 Saarbrucken, Germany
来源：
ACS COMBINATORIAL SCIENCE | 2015年 / 17卷 / 03期
关键词：
optical higl-throughput-screetting; ORR catalysts; fluorescent indicators; electrodiemical stability; REDUCTION REACTION; ELECTROCATALYSTS; FLUORESCEIN; UMBELLIFERONE; DISCOVERY; GRAPHENE; SURFACE; CARBON; ANODE;
D O I：
10.1021/co500128m
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A fluorescence-based electro-optical high-throughput method and setup for testing the oxygen reduction reaction (ORR) activity and electrochemical stability of 60 materials in parallel is described. We present thus a quantitative method for activity measurements for ORR-catalysts by optical fluorescence data acquisition. The fluorescence behavior of fluorescein, phloxine B, and umbelliferone as indicators is presented. The effect of oxygen concentration, saturation, and supply on electrochemical response is presented. Corrections for internal resistance differences and intensity differences are described. The final method allowed position independent determination of activities on the working-electrode library, containing up to 60 different electrocatalysts. A total of 378 selected mixed oxides have been studied. Cu/Ni/Mn and Co/Ni/Mn oxides proved electrochemically most active and comparable to a Pt-containing reference catalyst.
引用
收藏
页码：164 / 175
页数：12
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