Journal
CHINESE JOURNAL OF CATALYSIS
Volume 39, Issue 8, Pages 1403-1410Publisher
SCIENCE PRESS
DOI: 10.1016/S1872-2067(18)63053-0
Keywords
Bifunctional electrocatalyst; Hydrogen evolution reaction; Oxygen evolution reaction; Lily-like CoNi2S4; Overall water splitting
Funding
- National Natural Science Foundation of China [21376105, 21576113]
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Designing low-cost, highly efficient, and stable bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is of vital significance for water splitting. Herein, three-dimensional lily-like CoNi2S4 supported on nickel foam (CoNi2S4/Ni) has been fabricated by sulfuration of the Co-Ni precursor. As expected, CoNi2S4/Ni possesses such outstanding electrocatalytic properties that it requires an overpotential of only 54 mV at 10 mA cm(-2) and 328 mV at 100 mA cm(-2) for HER and OER, respectively. Furthermore, by utilizing the CoNi2S4/Ni electrodes as bifunctional electrocatalysts for overall water splitting, a current density of 10 mA cm(-2) can be obtained at a voltage of only 1.56 V. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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