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 in | ECS transactions Vol. 50; no. 2; pp. 1823 - 1829 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
15.03.2013
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Online Access | Get full text |
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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. |
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ISSN: | 1938-5862 1938-6737 |
DOI: | 10.1149/05002.1823ecst |