Platinum-decorated tin oxide and niobium-doped tin oxide pefc electrocatalysts

Oxygen reduction reaction activity

T. Tsukatsune, Y. Takabatake, Z. Noda, T. Daio, A. Zaitsu, Stephen Matthew Lyth, Akari Hayashi, Kazunari Sasaki

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Using tin oxide (SnO2) and niobium-doped tin oxide (Nb-SnO2) as alternative electrocatalyst support materials can effectively solve the issue of carbon corrosion in polymer electrolyte fuel cell (PEFC) cathodes. Here, we systematically explore the effect of support surface area, Pt loading, and Pt nanoparticle size on the electrochemistry of these carbon-free electrocatalysts. Reducing the Pt loading leads to an increase in electrochemical surface area, but the specific activity decreases as previously observed in conventional carbon based electrocatalysts. Removing residual chlorine impurities by replacing the H2PtCl6 nanoparticle precursor with Pt(acac)2 increases the specific activity. Niobium-doping of the SnO2 support also results in an increase in specific activity, due to the increased electronic conductivity. Consequently, the oxygen reduction reaction activity of optimized Pt-decorated Nb-SnO2 is approaching to that of Pt-decorated carbon black, the current state-of-the-art PEFC electrocatalyst.

Original languageEnglish
Pages (from-to)F1208-F1213
JournalJournal of the Electrochemical Society
Volume161
Issue number12
DOIs
Publication statusPublished - Jan 1 2014

Fingerprint

Niobium
platinum oxides
electrocatalysts
Electrocatalysts
Platinum
Tin oxides
niobium
tin oxides
Oxygen
Carbon
carbon
oxygen
Electrolytes
fuel cells
Fuel cells
Polymers
electrolytes
Nanoparticles
cell cathodes
Soot

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Platinum-decorated tin oxide and niobium-doped tin oxide pefc electrocatalysts : Oxygen reduction reaction activity. / Tsukatsune, T.; Takabatake, Y.; Noda, Z.; Daio, T.; Zaitsu, A.; Lyth, Stephen Matthew; Hayashi, Akari; Sasaki, Kazunari.

In: Journal of the Electrochemical Society, Vol. 161, No. 12, 01.01.2014, p. F1208-F1213.

Research output: Contribution to journalArticle

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AU - Takabatake, Y.

AU - Noda, Z.

AU - Daio, T.

AU - Zaitsu, A.

AU - Lyth, Stephen Matthew

AU - Hayashi, Akari

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