期刊
SMALL
卷 14, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201702568
关键词
bifunctional water splitting; cobalt iron hydroxide; electrocatalysts; electrodeposition; linear sweep voltammetry
类别
资金
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant - Korea government Ministry of Trade, Industry, and Energy [20164030201310]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20173010012980]
Highly efficient and stable electrocatalysts from inexpensive and earth-abundant elements are emerging materials in the overall water splitting process. Herein, cobalt iron hydroxide nanosheets are directly deposited on nickel foam by a simple and rapid electrodeposition method. The cobalt iron hydroxide (CoFe/NF) nanosheets not only allow good exposure of the highly active surface area but also facilitate the mass and charge transport capability. As an anode, the CoFe/NF electrocatalyst displays excellent oxygen evolution reaction catalytic activity with an overpotential of 220 mV at a current density of 10 mA cm(-2). As a cathode, it exhibits good performance in the hydrogen evolution reaction with an overpotential of 110 mV, reaching a current density of 10 mA cm(-2). When CoFe/NF electrodes are used as the anode and the cathode for water splitting, a low cell voltage of 1.64 V at 10 mA cm(-2) and excellent stability for 50 h are observed. The present work demonstrates a possible pathway to develop a highly active and durable substitute for noble metal electrocatalysts for overall water splitting.
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