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Title: In-Situ Monitoring of Particle Growth at PEMFC Cathode under Accelerated Cycling Conditions

Abstract

An in-situ method to measure changes in catalyst particle size at the cathode of a proton exchange membrane fuel cell is demonstrated. Synchrotron X-rays, 58 keV, were used to measure the pair distribution function on an operating fuel cell and observe the growth of catalyst particles under accelerated degradation conditions. The stability of Pt/C and PtCo/C with different initial particle sizes was monitored over 3000 potential cycles. The increase in particle size was fit to a linear trend as a function of cycles. The most stable electrocatalyst was found to be the alloyed PtCo with the larger initial particle size.

Authors:
; ; ; ;  [1];  [2]
  1. (GIT)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
NSFOTHER
OSTI Identifier:
1045686
Resource Type:
Journal Article
Journal Name:
Electrochem. Solid St.
Additional Journal Information:
Journal Volume: 15; Journal Issue: (5) ; 2012; Journal ID: ISSN 1099-0062
Country of Publication:
United States
Language:
ENGLISH
Subject:
30 DIRECT ENERGY CONVERSION; CATALYSTS; CATHODES; DISTRIBUTION FUNCTIONS; ELECTROCATALYSTS; FUEL CELLS; MONITORING; PARTICLE SIZE; PROTON EXCHANGE MEMBRANE FUEL CELLS; STABILITY; SYNCHROTRONS

Citation Formats

Redmond, Erin L., Setzler, Brian P., Juhas, Pavol, Billinge, Simon J.L., Fuller, Thomas F., and Columbia). In-Situ Monitoring of Particle Growth at PEMFC Cathode under Accelerated Cycling Conditions. United States: N. p., 2012. Web. doi:10.1149/2.004206esl.
Redmond, Erin L., Setzler, Brian P., Juhas, Pavol, Billinge, Simon J.L., Fuller, Thomas F., & Columbia). In-Situ Monitoring of Particle Growth at PEMFC Cathode under Accelerated Cycling Conditions. United States. doi:10.1149/2.004206esl.
Redmond, Erin L., Setzler, Brian P., Juhas, Pavol, Billinge, Simon J.L., Fuller, Thomas F., and Columbia). Thu . "In-Situ Monitoring of Particle Growth at PEMFC Cathode under Accelerated Cycling Conditions". United States. doi:10.1149/2.004206esl.
@article{osti_1045686,
title = {In-Situ Monitoring of Particle Growth at PEMFC Cathode under Accelerated Cycling Conditions},
author = {Redmond, Erin L. and Setzler, Brian P. and Juhas, Pavol and Billinge, Simon J.L. and Fuller, Thomas F. and Columbia)},
abstractNote = {An in-situ method to measure changes in catalyst particle size at the cathode of a proton exchange membrane fuel cell is demonstrated. Synchrotron X-rays, 58 keV, were used to measure the pair distribution function on an operating fuel cell and observe the growth of catalyst particles under accelerated degradation conditions. The stability of Pt/C and PtCo/C with different initial particle sizes was monitored over 3000 potential cycles. The increase in particle size was fit to a linear trend as a function of cycles. The most stable electrocatalyst was found to be the alloyed PtCo with the larger initial particle size.},
doi = {10.1149/2.004206esl},
journal = {Electrochem. Solid St.},
issn = {1099-0062},
number = (5) ; 2012,
volume = 15,
place = {United States},
year = {2012},
month = {10}
}