期刊
ELECTROCHEMISTRY
卷 79, 期 5, 页码 399-403出版社
ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.79.399
关键词
PEFC; Cathode; Titanium Nitride; Durability
资金
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
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 m(2) g(-1). The Pt loading on the catalyst was 19.5 wt%. The electrochemically active surface area (ECA) was 72 m(2) g(p)(-1). During the potential step cycling test (0.9 similar to 4.3 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).
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