Titanium-Niobium Oxides Mixed with Ti4O7 as Precious-Metaland Carbon-Free Cathodes for Polymer Electrolyte Fuel Cells

被引：28

作者：

Ishihara, A. ^{[1
]}

Hamazaki, M. ^{[2
]}

Arao, M. ^{[3
]}

Matsumoto, M. ^{[3
]}

Imai, H. ^{[3
]}

Kohno, Y. ^{[2
]}

Matsuzawa, K. ^{[2
]}

Mitsushima, S. ^{[1
,2
]}

Ota, K. ^{[2
]}

机构：

[1] Yokohama Natl Univ, Inst Adv Sci, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[2] Yokohama Natl Univ, Green Hydrogen Res Ctr, Hodogaya Ku, Yokohama, Kanagawa 2408501, Japan

[3] NISSAN ARC Ltd, Yokosuka, Kanagawa 2370061, Japan

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2016年 / 163卷 / 07期

关键词：

OXYGEN REDUCTION REACTION; CATALYSTS; OXYNITRIDE; ELECTROCATALYSTS; PHTHALOCYANINE; STABILITY; PROPERTY; MEDIA; PEFC;

D O I：

10.1149/2.0221607jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The development of non-platinum electrocatalysts for oxygen reduction reactions (ORR) is required for the commercialization of polymer electrolyte fuel cells. We focused on highly stable group 4 and 5 metal oxide-based compounds in acidic media. In this study, we proposed precious-metal-and carbon-free cathodes based on oxides and demonstrated the superior durability of oxide-based cathodes by preparing titanium-niobium oxides mixed with Ti4O7 (TixNbyOz + Ti4O7). The ORR activity of the TixNbyOz + Ti4O7 is higher than that of the Ti4O7, indicating that the TixNbyOz might have active sites for the ORR. The highest onset potential of the TixNbyOz + Ti4O7 was ca. 1.1 V with respect to reversible hydrogen electrode. No degradation of the ORR performance of TixNbyOz + Ti4O7 was observed during both start-stop and load cycle tests. Therefore, we successfully demonstrated that the precious-metal- and carbon-free oxide-based cathodes had superior durability under the cathode conditions of a polymer electrolyte fuel cell. (C) 2016 The Electrochemical Society. All rights reserved.

引用

页码：F603 / F609

页数：7

共 30 条

[1] Nb-doped TiO2 cathode catalysts for oxygen reduction reaction of polymer electrolyte fuel cells [J].