期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 11, 期 7, 页码 1736-1741出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ee00611c
关键词
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资金
- National Natural Science Foundation of China [51532001, 21471013]
- Shenzhen Peacock Plan Program [KQTD2016053015544057]
Cost efficient and long-term stable catalysts are in great demand for the oxygen evolution reaction (OER), a key process involved in water splitting cells and metal-air batteries. Here, we demonstrate that the ultrathin amorphous cobalt-vanadium hydr(oxy)oxide we synthesized is a highly promising electrocatalytic material for the OER with a low overpotential of 0.250 V (even lower down to 0.215 V when supported on Au foam) at 10 mA cm(-2) and a long stable operation time (170 h) in alkaline media. In combination with in situ X-ray absorption spectral characterization and first-principles simulations, we reveal that the ultrathin, amorphous and alloyed structural characteristics have enabled its facile transformation to the desirable active phase, leading to a dramatically enhanced catalytic activity. Our finding highlights the remarkable advantages of the two-dimensional amorphous material and sheds new light on the design of high-performance electrocatalysts.
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