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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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Abstract

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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Acknowledgments

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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Authors and Affiliations

  1. Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki, Aichi, 444-8585, Japan

    Sutasinee Kityakarn, Takahiro Saida, Aya Sode, Nozomu Ishiguro, Toshihiko Yokoyama & Mizuki Tada

  2. Research Center for Materials Science, Nagoya University, Furo, Chikusa, Aichi, 464-8602, Japan

    Sutasinee Kityakarn, Nozomu Ishiguro & Mizuki Tada

  3. Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, 10903, Thailand

    Sutasinee Kityakarn

  4. Innovation Research Center for Fuel Cells, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo, 182-8585, Japan

    Oki Sekizawa, Tomoya Uruga & Kensaku Nagasawa

  5. Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Koto, Sayo, Hyogo, 679-5198, Japan

    Tomoya Uruga

  6. Department of Mathematics and Material Sciences, Faculty of Integrated Arts and Sciences, The University of Tokushima, 1-1 Minamijosanjima, Tokushima, 770-8502, Japan

    Takashi Yamamoto

Authors
  1. Sutasinee Kityakarn
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  2. Takahiro Saida
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  3. Aya Sode
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  4. Nozomu Ishiguro
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  5. Oki Sekizawa
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  7. Kensaku Nagasawa
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  8. Takashi Yamamoto
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  9. Toshihiko Yokoyama
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  10. Mizuki Tada
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Corresponding author

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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  • DOI: https://doi.org/10.1007/s11244-014-0250-3

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