In-Situ Monitoring of Particle Growth at PEMFC Cathode under Accelerated Cycling Conditions
- GIT
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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- NSFOTHER
- OSTI ID:
- 1045686
- Journal Information:
- Electrochem. Solid St., Vol. 15, Issue (5) ; 2012; ISSN 1099-0062
- Country of Publication:
- United States
- Language:
- ENGLISH
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