Formation of Amorphous Pt Oxides: Characterization and Their Catalysis

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  • Kameoka Satoshi
    Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University
  • Shimoda Masahiko
    National Institute of Materials Science (NIMS)
  • Matsushita Yoshitaka
    National Institute of Materials Science (NIMS) Synchrotron X-ray Station at SPring-8, NIMS
  • Yamashita Yoshiyuki
    National Institute of Materials Science (NIMS) Synchrotron X-ray Station at SPring-8, NIMS
  • Katsuya Yoshio
    Synchrotron X-ray Station at SPring-8, NIMS
  • Tanaka Masahiko
    Synchrotron X-ray Station at SPring-8, NIMS
  • Tsai An-Pang
    Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University National Institute of Materials Science (NIMS)

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Amorphous Pt oxides (am-PtOx) were formed by the leaching of copper from a Cu3Pt alloy in concentrated HNO3 at 323 K for 12 h. The resulting am-PtOx was characterized using synchrotron X-ray powder diffraction, hard X-ray photoelectron spectroscopy, thermal analysis (TG-DTA, TPD) and the BET method. This material had a high specific surface area with micropores (61.7 m2/g) and decomposed to form Pt and O2 at approximately 720 K. The catalytic performance of the am-PtOx during CO oxidation was superior to that of a conventional Pt black catalyst. This study demonstrated a novel method of preparing am-PtOx with applications as a catalyst.

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