期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 9, 页码 11877-11883出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b02155
关键词
Oxygen evolution reaction; Hydrogen evolution reaction; Overall water splitting; Heterogeneous catalysis; Nanowire arrays; CuCo2S4
资金
- National Natural Science Foundation of China [21573160]
- Fundamental Research Funds for the Central Universities
- Science & Technology Commission of Shanghai Municipality [14DZ2261100]
Hydrogen produced from water splitting offers a green alternative to conventional energy such as fossil fuels. Herein, CuCo2S4 nanowire arrays were synthesized on a nickel foam substrate by a two-step hydrothermal approach and utilized as highly efficient bifunctional electrocatalyst for overall water splitting. The CuCo2S4 nanowire arrays were identified as an exceptionally active catalyst for the hydrogen evolution reaction (HER) in a basic solution with an extremely low overpotential of 65 mV to reach a current density of 10 mA/cm(2). The hierarchically structured CuCo2S4 electrode was also highly active toward the oxygen evolution reaction (OER), achieving a high current density of 100 mA/cm(2) at an overpotential of only 310 mV. Consequently, an alkaline electrolyzer constructed using CuCo2S4 nanowire arrays as both anode and cathode can realize overall water splitting with a current density of 100 mA/cm(2) at a cell voltage of 1.65 V, suggesting a promising bifunctional electrocatalyst for efficient overall water splitting.
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