Zirconium Oxide-Based Compounds as Non-Pt Cathode for Polymer Electrolyte Fuel Cell

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概要

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• Zirconium oxide-based compounds without partial oxidation of zirconium carbonitride were investigated as nonplatinum cathode for polymer electrolyte fuel cell. Zirconium oxide-based compounds were prepared by solutionprecipitation method and heat-treated at different temperature. In X-ray diffraction patterns tetragonal ZrO2 peaks decreased whereas monoclinic ZrO2 peaks increased with increasing temperature. Onset potential for oxygen reduction reaction (ORR) of the specimen heat-treated at 1000°C reached 0.90 V vs. RHE, indicating that the specimen had definite ORR activity. The increase of ORR activity may be explained by the increase of Zr3+ and/or oxygen vacancies due to the transformation of ZrO2 from tetragonal to monoclinic structure from the XRD results.

• 公益社団法人 電気化学会の論文

著者

• ISHIHARA Akimitsu

  Chemical Energy Laboratory, Yokohama National University

• OTA Ken-ichiro

  Chemical Energy Laboratory, Yokohama National University

• Ota Ken-ichiro

  Chemical Energy Laboratory Yokohama National University

• MATSUZAWA Koichi

  Chemical Energy Laboratory, Yokohama National University

• Ishihara Akimitsu

  Chemical Energy Laboratory Yokohama National University

• Matsuzawa Koichi

  Chemical Energy Laboratory Yokohama National University

• MITSUSHIMA Shigenori

  Chemical Energy Laboratory, Graduate School of Engineering, Yokohama National University

• OHGI Yoshiro

  Chemical Energy Laboratory, Yokohama National University

• UKITA Keisuke

  Chemical Energy Laboratory, Yokohama National University

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