Catalytic Activity and Stability of Ta Compounds for Oxygen Reduction Reaction

Durability is essential to electrocatalyst for fuel cell application. In this study, electrochemical stability of partially oxidized tantalum carbonitride (Ta-CNO), which is one of non-precious metal electrocatalyst for oxygen reduction reaction, has been investigated. The activity was the most stab...

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Published inECS transactions Vol. 50; no. 2; pp. 1823 - 1829
Main Authors Mitsushima, Shigenori, Fujita, Yoshio, Ishihara, Akimitsu, Ohgi, Yoshiro, Matsuzawa, Koichi, Matsumoto, Masashi, Arao, Masazumi, Imai, Hideto, Kohno, Y., Ota, Ken-ichiro
Format Journal Article
LanguageEnglish
Published 15.03.2013
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Summary:Durability is essential to electrocatalyst for fuel cell application. In this study, electrochemical stability of partially oxidized tantalum carbonitride (Ta-CNO), which is one of non-precious metal electrocatalyst for oxygen reduction reaction, has been investigated. The activity was the most stable around the rest potential in oxygen atmosphere, where was ca. 1.0 V vs. RHE, in chronoamperometry. It significantly decreased in higher potential range than the rest potential, and slightly decreased in lower potential range than the rest potential. Activity decrease ratio of the Ta-CNO was almost the same to a conventional Pt/C with rectangular potential wave between 0.6 to 1.0 V vs. RHE. The activity decrease of the Ta-CNO of the mixture with carbon black was larger than that of the Ta-CNO itself for both in constant potential and potential cycling.
ISSN:1938-5862
1938-6737
DOI:10.1149/05002.1823ecst