Enhanced activity for oxygen reduction reactions by carbon-supported high-index-facet Pt-Ti nanoparticles

Takao Gunji, Toyokazu Tanabe, Govindachetty Saravanan, Shingo Kaneko, Hideki Yoshikawa, Yoshitaka Matsushita, Nobuaki Sekido, Ya Xu, Shigenori Ueda, Hideki Abe, Futoshi Matsumoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Pt-Ti alloy nanoparticles (NPs) were synthesized over carbon-black supports via a wet-chemistry route. The prepared Pt-Ti NPs were atomically disordered and surrounded by high-index facets to have a spherical form. Controlled vacuum-annealing yielded atomically ordered Pt0.75Ti0.25 NPs, which were surrounded by the low-index {111} facets. The spherical Pt-Ti NPs exhibited enhanced activity than pure Pt NPs or even faceted Pt0.75Ti0.25 NPs toward the electrochemical oxygen-reduction reaction (ORR).

Original languageEnglish
Pages (from-to)7-11
Number of pages5
JournalElectrochemistry
Volume83
Issue number1
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • High-index surface
  • Oxygen reduction reaction
  • Pt-Ti alloy

ASJC Scopus subject areas

  • Electrochemistry

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