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Title: Enhanced MEA Performance for PEMFCs under Low Relative Humidity and Low Oxygen Content Conditions via Catalyst Functionalization

Abstract

This work demonstrates that functionalizing annealed-Pt/Ketjen black EC300j (a-Pt/KB) and dealloyed-PtNi/Ketjen black EC300j (d-PtNi/KB) catalysts using p-phenyl sulfonic acid can effectively enhance performance in the membrane electrode assemblies (MEAs) of proton exchange membrane fuel cells (PEMFCs). The functionalization increased the size of both Pt and PtNi catalyst particles and resulted in the further leaching of Ni from the PtNi catalyst while promoting the formation of nanoporous PtNi nanoparticles. The size of the SO3H-Pt/KB and SO3H-PtNi/KB carbon-based aggregates decreased dramatically, leading to the formation of catalyst layers with narrower pore size distributions.MEA tests highlighted the benefits of the surface functionalization, in which the cells with SO3H-Pt/KB and SO3H-PtNi/KB cathode catalysts showed superior high current density performance under reduced RH conditions, in comparison with cells containing annealed Pt/KB (a-Pt/KB) and de-alloyed PtNi/KB (d-PtNi/KB) catalysts. The performance improvement was particularly evident when using reactant gases with low relative humidity, indicating that the hydrophilic functional groups on the carbon improved the water retention in the cathode catalyst layer. These results show a new avenue for enhancing catalyst performance for the next generation of catalytic materials for PEMFCs.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE) - Office of Fuel Cell Technologies (FCTO)
OSTI Identifier:
1366716
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 164; Journal Issue: 6; Journal ID: ISSN 0013-4651
Publisher:
The Electrochemical Society
Country of Publication:
United States
Language:
English

Citation Formats

Xin, Le, Yang, Fan, Xie, Jian, Yang, Zhiwei, Kariuki, Nancy N., Myers, Deborah J., Peng, Jui-Kun, Wang, Xiaohua, Ahluwalia, Rajesh K., Yu, Kang, Ferreira, Paulo J., Bonastre, Alex Martinez, Fongalland, Dash, and Sharman, Jonathan. Enhanced MEA Performance for PEMFCs under Low Relative Humidity and Low Oxygen Content Conditions via Catalyst Functionalization. United States: N. p., 2017. Web. doi:10.1149/2.0051707jes.
Xin, Le, Yang, Fan, Xie, Jian, Yang, Zhiwei, Kariuki, Nancy N., Myers, Deborah J., Peng, Jui-Kun, Wang, Xiaohua, Ahluwalia, Rajesh K., Yu, Kang, Ferreira, Paulo J., Bonastre, Alex Martinez, Fongalland, Dash, & Sharman, Jonathan. Enhanced MEA Performance for PEMFCs under Low Relative Humidity and Low Oxygen Content Conditions via Catalyst Functionalization. United States. doi:10.1149/2.0051707jes.
Xin, Le, Yang, Fan, Xie, Jian, Yang, Zhiwei, Kariuki, Nancy N., Myers, Deborah J., Peng, Jui-Kun, Wang, Xiaohua, Ahluwalia, Rajesh K., Yu, Kang, Ferreira, Paulo J., Bonastre, Alex Martinez, Fongalland, Dash, and Sharman, Jonathan. Sun . "Enhanced MEA Performance for PEMFCs under Low Relative Humidity and Low Oxygen Content Conditions via Catalyst Functionalization". United States. doi:10.1149/2.0051707jes.
@article{osti_1366716,
title = {Enhanced MEA Performance for PEMFCs under Low Relative Humidity and Low Oxygen Content Conditions via Catalyst Functionalization},
author = {Xin, Le and Yang, Fan and Xie, Jian and Yang, Zhiwei and Kariuki, Nancy N. and Myers, Deborah J. and Peng, Jui-Kun and Wang, Xiaohua and Ahluwalia, Rajesh K. and Yu, Kang and Ferreira, Paulo J. and Bonastre, Alex Martinez and Fongalland, Dash and Sharman, Jonathan},
abstractNote = {This work demonstrates that functionalizing annealed-Pt/Ketjen black EC300j (a-Pt/KB) and dealloyed-PtNi/Ketjen black EC300j (d-PtNi/KB) catalysts using p-phenyl sulfonic acid can effectively enhance performance in the membrane electrode assemblies (MEAs) of proton exchange membrane fuel cells (PEMFCs). The functionalization increased the size of both Pt and PtNi catalyst particles and resulted in the further leaching of Ni from the PtNi catalyst while promoting the formation of nanoporous PtNi nanoparticles. The size of the SO3H-Pt/KB and SO3H-PtNi/KB carbon-based aggregates decreased dramatically, leading to the formation of catalyst layers with narrower pore size distributions.MEA tests highlighted the benefits of the surface functionalization, in which the cells with SO3H-Pt/KB and SO3H-PtNi/KB cathode catalysts showed superior high current density performance under reduced RH conditions, in comparison with cells containing annealed Pt/KB (a-Pt/KB) and de-alloyed PtNi/KB (d-PtNi/KB) catalysts. The performance improvement was particularly evident when using reactant gases with low relative humidity, indicating that the hydrophilic functional groups on the carbon improved the water retention in the cathode catalyst layer. These results show a new avenue for enhancing catalyst performance for the next generation of catalytic materials for PEMFCs.},
doi = {10.1149/2.0051707jes},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 6,
volume = 164,
place = {United States},
year = {2017},
month = {1}
}

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