Oxidation of Carbon Supports at Fuel Cell Cathodes： Differential Electrochemical Mass Spectrometric Study  

利用电化学微分质谱在燃料电池的阴极研究碳载体的氧化

作　　者：李明芳[1] 陶骞[1] 廖玲文[1] 徐杰[1] 蔡俊[2] 陈艳霞[1] 

机构地区：[1]中国科学技术大学合肥微尺度物质科学国家实验室,化学物理系,合肥230026 [2]中国科学技术大学物理学院光学与光学工程系,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2010年第4期442-446,I0002,共6页化学物理学报（英文）

基　　金：ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20773116）, the one hundred Talents＇ Program Sciences, and the National China （No.2010CB923302） of the Chinese Academy of Basic Research Program of

摘　　要：The effects of O2 and the supported Pt nano-particles on the mechanisms and kinetics of the carbon support corrosion are investigated by monitoring the CO2 production using differential electrochemical mass spectrometry in a dual-thin layer flow cell. Carbon can be oxidized in different distinct potential regimes; O2 accelerates carbon oxidation, the rates of CO2 production from carbon oxidation in O2 saturated solution are two times of that in N2 saturated solution at the same potential; Pt can catalyze the carbon oxidation, with supported Pt nanoparticles, the overpotential for carbon oxidation is much smaller than that without loading in the carbon electrode. The mechanism for the enhanced carbon oxidation by Pt and O2 are discussed.

关 键 词：Carbon corrosion Pt Fuel cell cathode Differential electrochemical mass spectrometry 

分 类 号：O[理学]