Stability of corrosion-resistant magneli-phase Ti4O7-supported PEMFC catalysts at high potentials

被引：179

作者：

Ioroi, Tsutomu ^{[1
]}

Senoh, Hiroshi ^{[1
]}

Yamazaki, Shin-Ichi ^{[1
]}

Siroma, Zyun ^{[1
]}

Fujiwara, Naoko ^{[1
]}

Yasuda, Kazuaki ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Res Inst Ubiquitous Energy Devices, Osaka 5638577, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2008年 / 155卷 / 04期

关键词：

D O I：

10.1149/1.2833310

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Substoichiometric titanium oxide (Ti4O7)-supported Pt catalysts were prepared and their electrochemical properties, particularly the effects of high-potential conditions on the activity and stability of Pt/Ti4O7 catalysts, were compared to those of Pt/C catalyst. Polarization measurements using membrane electrode assemblies revealed that the Pt/Ti4O7 cathode shows a similar activity for the oxygen reduction reaction as Pt/C catalyst at 80 degrees C. A high-potential holding test (1 h holding at 1.0-1.5 V vs anode) demonstrated that the Pt/Ti4O7 catalyst is quite stable against high potential up to 1.5 V. A single cell using a Pt/Ti4O7 cathode was operated at 80 degrees C, and voltage stability for > 350 h with H-2/O-2 was also demonstrated. (c) 2008 The Electrochemical Society.

引用

页码：B321 / B326

页数：6

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