Electrochemical Activity and Durability of Platinum Catalysts Supported on Nanometer-Size Titanium Nitride Particles for Polymer Electrolyte Fuel Cells

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概要

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• We synthesized a Pt catalyst supported on nanometer-size titanium nitride particles (Pt/TiN) by the nanocapsule method. The titanium nitride (TiN) support, which was synthesized by the radio-frequency (RF) plasma method, had high electrical conductivity, up to 850 S cm −1 at room temperature, with a surface area of 40 m2 g−1. The Pt loading on the catalyst was 19.5 wt%. The electrochemically active surface area (ECA) was 72 m2 g(Pt)−1. During the potential step cycling test (0.9∼1.3 V), the ECA values for Pt/TiN remained high and exceeded that of a commercial Pt catalyst supported on carbon black (Pt/CB) for potential step cycle numbers above 300. From the results of linear sweep voltammetry using a rotating disk electrode, we observed that the oxygen reduction reaction activity of the Pt/TiN exceeded that of Pt/CB. We conclude that the nanometer-size TiN might be a good candidate support material for the cathode of the polymer electrolyte fuel cell (PEFC).

著者

• Watanabe Masahiro

  Fuel Cell Nanomaterials Center University Of Yamanashi

• KAKINUMA Katsuyoshi

  Fuel Cell Nanomaterials Center, University of Yamanashi

• WAKASUGI Yuko

  Fuel Cell Nanomaterials Center, University of Yamanashi

• UCHIDA Makoto

  Fuel Cell Nanomaterials Center, University of Yamanashi

• KAMINO Takeo

  Fuel Cell Nanomaterials Center, University of Yamanashi

• UCHIDA Hiroyuki

  Clean Energy Research Center, University of Yamanashi

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• Complete NMR assignment of a sulfonated aromatic block copolymer via heteronuclear single-quantum correlation, heteronuclear multiple-bond correlation and heteronuclear single-quantum correlation total correlation spectroscopy
• Electrochemical Activity and Durability of Platinum Catalysts Supported on Nanometer-Size Titanium Nitride Particles for Polymer Electrolyte Fuel Cells
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