Tantalum oxide-based compounds as new non-noble cathodes for polymer electrolyte fuel cell

被引：76

作者：

Ishihara, Akimitsu ^{[1
]}

Tamura, Motoko ^{[1
]}

Matsuzawa, Koichi ^{[1
]}

Mitsushima, Shigenori ^{[1
]}

Ota, Ken-ichiro ^{[1
]}

机构：

[1] Yokohama Natl Univ, Chem Energy Lab, Yokohama, Kanagawa, Japan

来源：

ELECTROCHIMICA ACTA | 2010年 / 55卷 / 26期

关键词：

Tantalum oxide; Tantalum carbonitride; Non-platinum cathode; Polymer electrolyte fuel cell; Oxygen reduction reaction; OXYGEN REDUCTION REACTION; TRANSITION-METAL OXIDES; CATALYTIC-ACTIVITY; NONPLATINUM CATHODE; HEAT-TREATMENT; SULFURIC-ACID; PEFC; CHEMISORPTION; CARBONITRIDES; DEPOSITION;

D O I：

10.1016/j.electacta.2009.10.063

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Tantalum oxide-based compounds were examined as new non-noble cathodes for polymer electrolyte fuel cell. Tantalum carbonitride powder was partially oxidized under a trace amount of oxygen gas at 900 degrees C for 4 or 8 h. Onset potential for oxygen reduction reaction (ORR) of the specimen heat-treated for 8 h was 0.94 V vs. reversible hydrogen electrode in 0.1 mol dm(-3) sulfuric acid at 30 degrees C. The partial oxidation of tantalum carboniride was effective to enhance the catalytic activity for the ORR. The partially oxidized specimen with highest catalytic activity had ca. 5.25 eV of ionization potential, indicating that there was most suitable strength of the interaction of oxygen and tantalum on the catalyst surface. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：7581 / 7589

页数：9

共 34 条

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