Cobaltporphyrin-adsorbed carbon black: Highly efficient electrocatalysts for oxygen reduction

Makoto Yuasa, Aritomo Yamaguchi, Kenichi Oyaizu, Yosuke Fujito, Mizuki Kitao, Tsuyoshi Sato

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

meso-Substituted cobalt porphyrins adsorbed on carbon black were prepared as catalysts for the electroreduction of O2. The catalyst, which was prepared by using a homogenizer in mixing cobalt tetraethylporphyrin and carbon black, gave rise to electroreduction of O2 at a remarkably positive potential (Ep = 0.45 V versus saturated calomel electrode (SCE) and showed a high selectively for the four-electron reduction (n=3.8). Electrochemical study and extended X-ray absorption fine structure (EXAFS) analysis revealed that the adsorbed face-to-face dimeric aggregates of cobalt porphyrin molecules were highly efficient catalysts for electroreduction of O2.

Original languageEnglish
Pages (from-to)702-705
Number of pages4
JournalPolymers for Advanced Technologies
Volume16
Issue number9
DOIs
Publication statusPublished - 2005 Sep 1
Externally publishedYes

Keywords

  • Adsorption
  • Carbon black
  • Catalysts
  • Cobaltporphyrin
  • Electrochemistry

ASJC Scopus subject areas

  • Polymers and Plastics

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