Journal
ACS CATALYSIS
Volume 2, Issue 7, Pages 1319-1330Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs300228p
Keywords
fuel cell; PEFC; operando XAFS; time-resolved XAFS; Pt3Co catalyst; structural kinetics
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Funding
- New Energy and Industrial Technology Development Organization of the Ministry of Economy, Trade and Industry in Japan
- Grants-in-Aid for Scientific Research [22241029] Funding Source: KAKEN
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The structural kinetics of surface events on a Pt3Co/C cathode catalyst in a polymer electrolyte fuel cell (pEFc) was investigated by operando time-resolved X-ray absorption fine,structure (XAFS) with a time resolution of 500 me. The :rate: Constants of electrochemical reactions, the changes in charge density on Pt, and the changes in the local coordination structures of the Pt3Co alloy catalyst in the pEFC were Successfully evaluated during fuel-cell voltage-operating;processes. Significant time lags were observed between the electrochemical reactions and the structural changes in the Pt3Co alloy catalyst. the rate constants of all the surface events on the Pt3Co/C catalyst were significantly higher than those on the Pt/C catalyst, suggesting the advantageous behaviors (cell performance and catalyst durability) on the Pt3Co alloY cathode catalyst:
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