Preparation of nanocrystalline Nb-doped SnO2on mesoporous carbon for PEFC electrocatalysts

Yusuke Inoue, Masahiro Yasutake, Zhiyun Noda, Stephen Matthew Lyth, Masamichi Nishihara, Akari Hayashi, Junko Matsuda, Kazunari Sasaki

Research output: Contribution to journalConference Contributionpeer-review

1 Citation (Scopus)

Abstract

Platinum-based nanoparticles decorated on carbon supports (Pt/C) are widely used as electrocatalysts in polymer electrolyte fuel cells (PEFCs). Meanwhile, SnO2 is more stable than carbon at high potentials in cathodic environments. Highly durable Pt/SnO2/C electrocatalysts have therefore previously been developed using carbon nanomaterials as an electron-conducting backbone and SnO2 as a stable support layer for highly dispersed platinum nanoparticles. Here, we report on the development of Pt/SnO2/C electrocatalysts based on mesoporous carbon (MC) scaffolds. The electron conduction pathway through SnO2 was minimized by reducing the SnO2 loading. The use of Pt/SnO2/MC electrocatalysts resulted in high activity towards the oxygen reduction reaction (ORR) as well as excellent start-stop voltage cycling durability in half-cell conditions.

Original languageEnglish
Pages (from-to)413-423
Number of pages11
JournalECS Transactions
Volume109
Issue number9
DOIs
Publication statusPublished - 31 Oct 2022
Event242nd ECS Meeting - Hilton Atlanta, Atlanta, United States
Duration: 9 Oct 202213 Oct 2022
https://www.electrochem.org/242/

Keywords

  • platinum based nanoparticles
  • electrocatalysts
  • mesoporous carbon

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