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

doi:10.5796/electrochemistry.83.7

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

ENG - Materials Science

Research output: Contribution to journal › Article › peer-review

6 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 Pt_0.75Ti_0.25 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 Pt_0.75Ti_0.25 NPs toward the electrochemical oxygen-reduction reaction (ORR).

Original language	English
Pages (from-to)	7-11
Number of pages	5
Journal	Electrochemistry
Volume	83
Issue number	1
DOIs	https://doi.org/10.5796/electrochemistry.83.7
Publication status	Published - 2015

Keywords

High-index surface
Oxygen reduction reaction
Pt-Ti alloy

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10.5796/electrochemistry.83.7

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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).",

keywords = "High-index surface, Oxygen reduction reaction, Pt-Ti alloy",

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

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T1 - Enhanced activity for oxygen reduction reactions by carbon-supported high-index-facet Pt-Ti nanoparticles

AU - Gunji, Takao

AU - Tanabe, Toyokazu

AU - Saravanan, Govindachetty

AU - Kaneko, Shingo

AU - Yoshikawa, Hideki

AU - Matsushita, Yoshitaka

AU - Sekido, Nobuaki

AU - Xu, Ya

AU - Ueda, Shigenori

AU - Abe, Hideki

AU - Matsumoto, Futoshi

PY - 2015

Y1 - 2015

N2 - 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).

AB - 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).

KW - High-index surface

KW - Oxygen reduction reaction

KW - Pt-Ti alloy

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

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Keywords

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