期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 693, 期 -, 页码 964-969出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.09.247
关键词
Electrocatalyst; CoNi hydroxide nanosheet; Nickel nanocone; Amorphous; Oxygen evolution reaction
资金
- Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) project of the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [2013M3A6B1078870]
- New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning [20123010010160, 20153030013200]
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [2015R1A5A1037548]
The catalytic performance of nanostructured bimetallic hydroxide nanosheets (NSs) on a Ni foam was investigated as a function of the Co/Ni concentration ratio. A facile but highly precise composition-controlled electrodeposition technique was employed to synthesize CoNi-layered double hydroxides (LDH) within tens of seconds; the 0.3/0.2 CoNi-LDH NSs showed the best current density (76.9 mA cm(-2) at 1 V (vs. Ag/AgCl)). However, the poor adhesion of the CoNi-LDH NSs on the Ni foam decreased the current density to 82% at 1 V (vs. Ag/AgCl) after 10 h. The manipulation of the surface of the Ni foam via the deposition of Ni nanocones (NCs) enhanced the long-term stability to 92.6% and led to an overpotential of 366 mV and a current density of 111.5 mA cm(-2) at 1 V (vs. Ag/AgCl) in 1 M KOH alkaline solution. Thus, the CoNi LDH NSs on the surface-modified Ni foam are a promisingly efficient and stable oxygen evolution reaction (OER) catalyst. (C) 2016 Elsevier B.V. All rights reserved.
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