Preparation of Pt/mesoporous carbon (MC) electrode catalyst and its reactivity toward oxygen reduction

Akari Hayashi, Hideo Notsu, Ken'ichi Kimijima, Junichi Miyamoto, Ichizo Yagi

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Highly structurally controllable mesoporous carbon (MC) support was synthesized through the self-organization of surfactants and carbon precursors, followed by carbonization. Then, Pt catalysts were successfully deposited on MC, in order to create a model of an ideal triple phase boundary in such a nano-space. The resulting Pt/MC catalysts showed better oxygen reduction reactivity with the existence of Nafion® than without that. Handling of ionomers is a key to develop an ideal triple phase boundary within the pores of MC. Depending on the solvent where Nafion® was diluted, the reactivity toward oxygen reduction was different. Due to its hydrophobic pores of MC, Nafion® diluted by more hydrophobic solvent was able to access to the pores easily. As a result, Pt inside the mesopores was efficiently used. Furthermore, by changing a Pt precursor, oxygen reduction current started to increase at more positive potential, indicating the enhanced activity.

Original languageEnglish
Pages (from-to)6117-6125
Number of pages9
JournalElectrochimica Acta
Volume53
Issue number21
DOIs
Publication statusPublished - Sep 1 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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