Poisoning and regeneration of Pd catalyst in direct formic acid fuel cell

被引：71
|
作者：
Zhou, Yi [2 ,3 ]
Liu, Jianguo [1 ,2 ,3 ]
Ye, Jilei [2 ,3 ]
Zou, Zhigang [1 ,2 ,3 ]
Ye, Jinhua [1 ,2 ,3 ]
Gu, Jun [2 ,3 ]
Yu, Tao [2 ,3 ]
Yang, Aidong [4 ]
机构：
[1] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Dept Phys, Ecomat & Renewable Energy Res Ctr, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[4] Univ Surrey, Fac Engn & Phys Sci, Guildford GU2 7XH, Surrey, England
来源：
ELECTROCHIMICA ACTA | 2010年 / 55卷 / 17期
关键词：
Direct formic acid fuel cell; Performance degradation; Pd poisoning; Performance regeneration; Electrochemical impedance spectrum; ELECTROOXIDATION; NANOPARTICLES; ELECTRODE; SURFACE; CO;
D O I：
10.1016/j.electacta.2010.04.014
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Palladium catalyst poisoned in the anode of direct formic acid fuel cell (DFAFC) during constant current discharging can be fully regenerated by a non-electrochemical method, i.e. just switching pure water to DFAFC for 1 h. Electrochemical impedance spectrum of DFAFC during the discharging and regeneration were recorded and analyzed. No much difference could be found for the high-frequency resistance of DFAFC after discharging while the charge transfer resistance in the mediate-frequency region increased significantly. The voltage variation during the regeneration showed that one platform of 0.35 V was formed by the intermediate species of formic acid oxidation, which is proven to be critical for cell performance regeneration. The results indicated that the absorption of poisoning species on Pd was the main reason for the decaying of cell performance. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：5024 / 5027
页数：4
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