Fluorescence detection of hydroxyl radical generated from oxygen reduction on Fe/N/C catalyst

被引：0

作者：

Li-Na Chen ^{[1
]}

Wen-Song Yu ^{[1
]}

Tao Wang ^{[1
]}

Xiao-Dong Yang ^{[2
]}

Hui-Juan Yang ^{[3
]}

Zhi-Xin Chen ^{[1
]}

Tan Wang ^{[1
]}

Na Tian ^{[1
]}

Zhi-You Zhou ^{[1
]}

Shi-Gang Sun ^{[1
]}

机构：

[1] State Key Laboratory of Physical Chemistry of Solid Surfaces,Innovation Center of Chemistry for Energy Materials,College of Chemistry and Chemical Engineering,Xiamen University

[2] College of Materials Science & Engineering,Huaqiao University

[3] Institute of Advanced Electrochemical Energy,School of Materials Science and Engineering,Xi'an University of Technology

来源：

Science China(Chemistry) | 2020年 / 02期

基金：

中国国家自然科学基金;

关键词：

oxygen reduction reaction; Fe/N/C catalysts; radical; coumarin; fluorescent probe;

D O I：

暂无

中图分类号：

O643.36 [催化剂]; O657.3 [光化学分析法（光谱分析法）]; TM911.4 [燃料电池];

学科分类号：

摘要：

Pyrolyzed Fe/N/C catalyst has been considered as the most promising candidate to replace Pt for oxygen reduction reaction（ORR） in fuel cells.However,poor stability of Fe/N/C catalyst,mainly attributed to the oxidation corrosion by aggressive ·OH radical,severely hampers its applications.However,the exact mechanism for generation of ·OH is unclear yet.Herein,we developed a fluorescent method to effectively detect ·OH generated from ORR on Fe/N/C catalyst by using coumarin as a fluorescent probe.A great difference in potential dependence between ·OH and H;O;generated from the ORR was observed,which suggests that ·OH is not generated from the decomposition of H;O;as traditional viewpoint.

引用

页码：198 / 202

页数：5

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