期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 26, 页码 21587-21592出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b06004
关键词
electrocatalysis; doping; sodium cobalt oxide; oxygen evolution reaction; synergistic effects
资金
- Key Projects in the Nature Science Foundation of Jiangsu Province [BK2011030]
- National Nature Science Foundation of China [21576135]
- Major Project of Educational Commission of Jiangsu Province of China [13KJA430004]
- Youth Fund in Jiangsu Province [BK20150945]
- CAS Interdisciplinary Innovation Team
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Electrochemical energy storage and conversion technologies, such as water-splitting devices, rechargeable metal-air batteries, and regenerative fuel cells, are promising alternatives to traditional nonrenewable energy systems. Given the sluggish oxygen evolution reaction (OER) in the above renewable-energy technologies, the development of efficient OER electrocatalysts with high performance is of great importance. Here, we demonstrate a layer-structured oxide Na0.86Co0.95Fe0.05O2 (NCF0.05) as a novel electrocatalyst for efficient water oxidation in alkaline media. NCF0.05 shows enhanced performance, including lower overpotential, lower Tafel slope and better stability than the parent Na0.86CoO2 (NC). Especially, the OER performance of NCF0.05 is comparable to the state-of-the-art IrO2 catalyst. This enhanced catalytic activity of NCF0.05 may be ascribed to the unusual synergistic interplay between Fe and Co. A possible dual-metal-site mechanism was also proposed for OER on NCF0.05.
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