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Oxygen Reduction Reaction Activity and Durability of Pt Catalysts Supported on Titanium Carbide

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Special Doctoral Program for Green Energy Conversion Science and Technology, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan
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Fuel Cell Nanomaterials Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan
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Clean Energy Research Center, University of Yamanashi, 4 Takeda, Kofu 400-8510, Japan
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Author to whom correspondence should be addressed.
Academic Editor: Minhua Shao
Catalysts 2015, 5(2), 966-980; https://doi.org/10.3390/catal5020966
Received: 2 May 2015 / Revised: 3 June 2015 / Accepted: 12 June 2015 / Published: 23 June 2015
(This article belongs to the Special Issue Electrocatalysis in Fuel Cells)
We have prepared Pt nanoparticles supported on titanium carbide (TiC) (Pt/TiC) as an alternative cathode catalyst with high durability at high potentials for polymer electrolyte fuel cells. The Pt/TiC catalysts with and without heat treatment were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Hemispherical Pt nanocrystals were found to be dispersed uniformly on the TiC support after heat treatment at 600 °C in 1% H2/N2 (Pt/TiC-600 °C). The electrochemical properties (cyclic voltammetry, electrochemically active area (ECA), and oxygen reduction reaction (ORR) activity) of Pt/TiC-600 °C and a commercial Pt/carbon black (c-Pt/CB) were evaluated by the rotating disk electrode (RDE) technique in 0.1 M HClO4 solution at 25 °C. It was found that the kinetically controlled mass activity for the ORR on Pt/TiC-600 °C at 0.85 V (507 A g−1) was comparable to that of c-Pt/CB (527 A g−1). Moreover, the durability of Pt/TiC-600 °C examined by a standard potential step protocol (E = 0.9 V↔1.3 V vs. RHE, holding 30 s at each E) was much higher than that for c-Pt/CB. View Full-Text
Keywords: titanium carbide; polymer electrolyte fuel cell; cathode catalyst; oxygen reduction reaction; corrosion-resistant catalyst support titanium carbide; polymer electrolyte fuel cell; cathode catalyst; oxygen reduction reaction; corrosion-resistant catalyst support
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Chiwata, M.; Kakinuma, K.; Wakisaka, M.; Uchida, M.; Deki, S.; Watanabe, M.; Uchida, H. Oxygen Reduction Reaction Activity and Durability of Pt Catalysts Supported on Titanium Carbide. Catalysts 2015, 5, 966-980.

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Catalysts, EISSN 2073-4344, Published by MDPI AG
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