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In Situ Time-Resolved XAFS of Transitional States of Pt/C Cathode Electrocatalyst in an MEA During PEFC Loading with Transient Voltages

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The transitional states of a Pt/C cathode electrocatalyst in the membrane electrode assembly of a polymer electrolyte fuel cell during loading with transient voltages were systematically analyzed by in situ time-resolved X-ray absorption fine structure with time resolution of 100 ms. The results suggest that the local coordination of the Pt cathode electrocatalyst was unaffected by the transient voltages during both rapid and gradual loading over 0–30 s.

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This work was supported by the New Energy and Industrial Technology Development Organization of the Ministry of Economy, Trade, and Industry, Japan. XAFS measurements were performed at SPring-8 (No. 2012A1013 (BL40XU) and No. 2012B7820 (BL36XU)).

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Correspondence to Mizuki Tada.

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Kityakarn, S., Saida, T., Sode, A. et al. In Situ Time-Resolved XAFS of Transitional States of Pt/C Cathode Electrocatalyst in an MEA During PEFC Loading with Transient Voltages. Top Catal 57, 903–910 (2014). https://doi.org/10.1007/s11244-014-0250-3

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  • Polymer electrolyte fuel cell
  • Pt catalyst
  • Time-resolved XAFS
  • In situ analysis
  • Transient voltage