Electrochemical impedance study of carbon-supported Pt/Mo-oxide for CO-tolerant anode catalyst

被引：6
|
作者：
Ioroi, Tsutomu [1 ]
Yamazaki, Shin-ichi [1 ]
Siroma, Zyun [1 ]
Fujiwara, Naoko [1 ]
Yasuda, Kazuaki [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, AIST, Res Inst Ubiquitous Energy Devices, Ikeda, Osaka 5638577, Japan
来源：
ELECTROCHEMISTRY | 2007年 / 75卷 / 02期
关键词：
PEMFC; electrocatalyst; molybdenum oxide; carbon monoxide;
D O I：
10.5796/electrochemistry.75.159
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The CO-tolerance of a carbon-supported Pt/Mo-oxide (Pt/MoOx/C) anode in proton-exchange membrane fuel cells was examined by electrochemical impedance spectroscopy. A pseudo-inductive loop was clearly observed only for a Pt/MoOx/C anode at low anodic polarizations, which indicates the onset of the electro-oxidation of adsorbed CO (COad) on the Pt/MoOx/C catalyst. The CO-tolerance of Pt/MoOx/C at low anodic polarizations is mainly ascribed to the combination of the electro-oxidation Of COad and the removal of CO by the water-gas shift reaction depending on the operating conditions.
引用
收藏
页码：159 / 162
页数：4
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