Ming-fang Li, Qian Tao, Ling-wen Liao, Jie Xu, Jun Cai, Yan-xia Chen. Oxidation of Carbon Supports at Fuel Cell Cathodes: Differential Electrochemical Mass Spectrometric Study[J]. Chinese Journal of Chemical Physics , 2010, 23(4): 442-446. doi: 10.1088/1674-0068/23/04/442-446
Citation: Ming-fang Li, Qian Tao, Ling-wen Liao, Jie Xu, Jun Cai, Yan-xia Chen. Oxidation of Carbon Supports at Fuel Cell Cathodes: Differential Electrochemical Mass Spectrometric Study[J]. Chinese Journal of Chemical Physics , 2010, 23(4): 442-446. doi: 10.1088/1674-0068/23/04/442-446

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

doi: 10.1088/1674-0068/23/04/442-446
Funds:  This work was supported by the National Natural Science Foundation of China (No.20773116), the onehundred Talents' Program of the Chinese Academy of Sciences, and the National Basic Research Program of China (No.2010CB923302).
  • Received Date: 2010-01-11
  • 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.

     

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