To investigate the degradation mechanism of the as-prepared Pd/C catalyst, in situ and ex situ accelerated stress tests were carried out via potential cycling. Durability tests of the single cells with Pd/C catalysts were performed through an interval constant current density mode. Electrochemical impedance spectroscopy (EIS) was applied to measure the impedance of the single cell during degradation tests. Results indicate that the degradation of Pd/C catalyst may be attributed to the phase transition of absorbed α-phase PdH to β-phase PdH, the dissolution of Pd metal, and the size increase of Pd nanoparticles. Moreover, the degradation of single cell may be predominantly ascribed to the degradation of catalyst, the deterioration of contact between electronic/ionic conductors, as well as the flooding of gas diffusion channels.
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October 2014
This article was originally published in
Journal of Fuel Cell Science and Technology
Research-Article
In Situ and Ex Situ Studies on the Degradation of Pd/C Catalyst for Proton Exchange Membrane Fuel Cells
Yongfu Tang,
Yongfu Tang
1
Hebei Key Laboratory of Applied Chemistry,
Yanshan University,
e-mail: tangyongfu@ysu.edu.cn
College of Environmental and Chemical Engineering
,Yanshan University,
Qinhuangdao, Hebei 066004
, China
e-mail: tangyongfu@ysu.edu.cn
1Corresponding author.
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Shichun Mu,
Shichun Mu
State Key Laboratory of Advanced Technology
for Materials Synthesis and Processing,
for Materials Synthesis and Processing,
Wuhan University of Technology
,Wuhan 430070
, China
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Shengxue Yu,
Shengxue Yu
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
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Yufeng Zhao,
Yufeng Zhao
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
Search for other works by this author on:
Hongchao Wang,
Hongchao Wang
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
Search for other works by this author on:
Faming Gao
Faming Gao
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
Search for other works by this author on:
Yongfu Tang
Hebei Key Laboratory of Applied Chemistry,
Yanshan University,
e-mail: tangyongfu@ysu.edu.cn
College of Environmental and Chemical Engineering
,Yanshan University,
Qinhuangdao, Hebei 066004
, China
e-mail: tangyongfu@ysu.edu.cn
Shichun Mu
State Key Laboratory of Advanced Technology
for Materials Synthesis and Processing,
for Materials Synthesis and Processing,
Wuhan University of Technology
,Wuhan 430070
, China
Shengxue Yu
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
Yufeng Zhao
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
Hongchao Wang
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
Faming Gao
Hebei Key Laboratory of Applied Chemistry,
College of Environmental and Chemical Engineering,
College of Environmental and Chemical Engineering,
Yanshan University
,Qinhuangdao, Hebei 066004
, China
1Corresponding author.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received August 30, 2013; final manuscript received April 12, 2014; published online June 10, 2014. Assoc. Editor: Umberto Desideri.
J. Fuel Cell Sci. Technol. Oct 2014, 11(5): 051004 (7 pages)
Published Online: June 10, 2014
Article history
Received:
August 30, 2013
Revision Received:
April 12, 2014
Citation
Tang, Y., Mu, S., Yu, S., Zhao, Y., Wang, H., and Gao, F. (June 10, 2014). "In Situ and Ex Situ Studies on the Degradation of Pd/C Catalyst for Proton Exchange Membrane Fuel Cells." ASME. J. Fuel Cell Sci. Technol. October 2014; 11(5): 051004. https://doi.org/10.1115/1.4027708
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