Structural alteration of nanostructure carbon particles carrying Pt clusters in H2 and O2 gases

Chihiro Kaito, Ryoichi Ono, Ryuta Sakao, Akihito Kumamoto, Midori Saito, Yuki Kimura, Shinsuke Ohyagi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The effects of H2 and O2 gases on the typical fuel cell catalyst of Pt clusters on carbon particles (Pt on C) were examined using a special side-entry sample holder for high-resolution transmission electron microscopy. The holder can be used to transfer the specimen without exposure to air. The effects of H2 and O2 were detected after the specimen was exposed to the gases at 60 °C for 15 h. The predominant effect of H2 was the coagulation of the Pt clusters. The effect of O 2 was to alter the structure of the carbon particles by oxidation.

Original languageEnglish
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number45-49
Publication statusPublished - 2007 Dec 14


  • Amorphous carbon
  • Carbon particle
  • Catalyst
  • Graphitization
  • Heat treatment
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)


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