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Title: The Corrosion of PEM Fuel Cell Catalyst Supports and Its Implications for Developing Durable Catalysts

Abstract

Studying the corrosion behavior of catalyst support materials is of great significance for understanding the degradation of PEM fuel cell performance and developing durable catalysts. The oxidation of Vulcan carbon black (the most widely-used catalyst support for PEM fuel cells) was investigated using various electrochemical stressing methods (fixed-potential holding vs. potential step cycling), among which the potential step cycling was considered to mimic more closely the real drive cycle operation of vehicle PEM fuel cells. The oxidation of carbon was accelerated under potential step conditions as compared with the fixed-potential holding condition. Increasing potential step frequency or decreasing the lower potential limit in the potential step can further accelerate the corrosion of carbon. The accelerated corrosion of carbon black was attributed to the cycle of consumption/regeneration of some easily oxidized species. These findings are being employed to develop a test protocol for fast screening durable catalyst support.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
951839
Report Number(s):
PNNL-SA-61042
Journal ID: ISSN 0013-4686; ELCAAV; 24990; EB4209000; TRN: US200913%%152
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Electrochimica Acta, 54:3109-3114; Journal Volume: 54
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; CARBON; CARBON BLACK; CATALYST SUPPORTS; CATALYSTS; CORROSION; ELECTROCATALYSTS; FUEL CELLS; OXIDATION; PERFORMANCE; PEM fuel cell; catalyst support; degradation; corrosion; potential step; test protocol; Environmental Molecular Sciences Laboratory

Citation Formats

Shao, Yuyan, Wang, Jun, Kou, Rong, Engelhard, Mark H., Liu, Jun, Wang, Yong, and Lin, Yuehe. The Corrosion of PEM Fuel Cell Catalyst Supports and Its Implications for Developing Durable Catalysts. United States: N. p., 2009. Web. doi:10.1016/j.electacta.2008.12.001.
Shao, Yuyan, Wang, Jun, Kou, Rong, Engelhard, Mark H., Liu, Jun, Wang, Yong, & Lin, Yuehe. The Corrosion of PEM Fuel Cell Catalyst Supports and Its Implications for Developing Durable Catalysts. United States. doi:10.1016/j.electacta.2008.12.001.
Shao, Yuyan, Wang, Jun, Kou, Rong, Engelhard, Mark H., Liu, Jun, Wang, Yong, and Lin, Yuehe. Sat . "The Corrosion of PEM Fuel Cell Catalyst Supports and Its Implications for Developing Durable Catalysts". United States. doi:10.1016/j.electacta.2008.12.001.
@article{osti_951839,
title = {The Corrosion of PEM Fuel Cell Catalyst Supports and Its Implications for Developing Durable Catalysts},
author = {Shao, Yuyan and Wang, Jun and Kou, Rong and Engelhard, Mark H. and Liu, Jun and Wang, Yong and Lin, Yuehe},
abstractNote = {Studying the corrosion behavior of catalyst support materials is of great significance for understanding the degradation of PEM fuel cell performance and developing durable catalysts. The oxidation of Vulcan carbon black (the most widely-used catalyst support for PEM fuel cells) was investigated using various electrochemical stressing methods (fixed-potential holding vs. potential step cycling), among which the potential step cycling was considered to mimic more closely the real drive cycle operation of vehicle PEM fuel cells. The oxidation of carbon was accelerated under potential step conditions as compared with the fixed-potential holding condition. Increasing potential step frequency or decreasing the lower potential limit in the potential step can further accelerate the corrosion of carbon. The accelerated corrosion of carbon black was attributed to the cycle of consumption/regeneration of some easily oxidized species. These findings are being employed to develop a test protocol for fast screening durable catalyst support.},
doi = {10.1016/j.electacta.2008.12.001},
journal = {Electrochimica Acta, 54:3109-3114},
number = ,
volume = 54,
place = {United States},
year = {Sat Jan 03 00:00:00 EST 2009},
month = {Sat Jan 03 00:00:00 EST 2009}
}