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- Title
Active catalysts based on cobalt oxide@cobalt/N-C nanocomposites for oxygen reduction reaction in alkaline solutions.
- Authors
Huang, Dekang; Luo, Yanping; Li, Shaohui; Zhang, Bingyan; Shen, Yan; Wang, Mingkui
- Abstract
Over the past few years, electrocatalysis for the oxygen reduction reaction in alkaline solutions has undergone tremendous advances, and non-precious metal catalysts are of prime interest. In this study, we present a highly promising CoO@Co/N-C (where N-C represents a N-doped carbon material) catalyst, achieving an onset potential of 0.99 V (versus the reversible hydrogen electrode (RHE)) and a limiting current density of 7.07 mA·cm (at 0.3 V versus RHE) at a rotation rate of 2,500 rpm in an O-saturated 0.1 M KOH solution, comparable to a commercial Pt/C catalyst. The H-O alkaline fuel cell test of CoO@Co/N-C as the cathode reveals a maximum power density of 237 mW·cm. Detailed investigation clarifies that a synergistic effect, induced by C-N, Co-N-C, and CoO/Co moieties, is responsible for the bulk of the gain in catalytic activity. [Figure not available: see fulltext.]
- Publication
Nano Research, 2014, Vol 7, Issue 7, p1054
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-014-0468-1