Oxygen transfer and storage processes inside the mesopores of platinum-deposited mesoporous carbon catalyst thin-layer electrode

Akari Hayashi, Kenichi Kimijima, Junichi Miyamoto, Ichizo Yagi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Platinum-deposited mesoporous carbon (Pt/MC) catalyst has revealed an interesting response toward oxygen reduction. Its thin-layer rotating disk electrode (RDE) has shown characteristic oxygen reduction current that does not depend on oxygen diffusion through the electrolyte solution, while Pt-deposited carbon black (Pt/ CB) thin-layer RDE shows diffusion-limited current. This is due to unique oxygen transfer and storage occurring within the 7-8 nm sized mesopores of MC support, which do not exist in CB support. With a Pt/MC thin-layer electrode, mesopores can produce an ionomer-filled channel connecting catalysts and external environment and favorably transferring oxygen. Also, even after oxygen inside the pores is used up, oxygen can be restored during the potential cycling.

Original languageEnglish
Pages (from-to)12149-12153
Number of pages5
JournalJournal of Physical Chemistry C
Volume113
Issue number28
DOIs
Publication statusPublished - Jul 16 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Oxygen transfer and storage processes inside the mesopores of platinum-deposited mesoporous carbon catalyst thin-layer electrode'. Together they form a unique fingerprint.

Cite this