期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 36, 页码 42944-42956出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c13488
关键词
Sulfur-doped vanadium-molybdenum oxides; 2D core@shell structures; bifunctional catalysts; synergistic effects; electrochemical water splitting
资金
- Program for Fostering Next-Generation Researchers in Engineering through the National Research Foundation (NRF) - Ministry of Science and ICT of Republic of Korea [2017H1D8A2030449]
- Innovation Research Center for Next Generation Battery-based Materials, Parts and Applied Technology through the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry and Energy (MOTIE) of Republic of Korea [20214000000040]
A novel sulfur-doped vanadium-molybdenum oxide nanolayer shelling over two-dimensional cobalt nanosheets was successfully synthesized, showing excellent activities for hydrogen and oxygen evolution reactions. The material exhibited superior performance and stability in an electrolyzer, suggesting its potential as a bifunctional catalyst for green hydrogen production through electrochemical water splitting.
A novel sulfur-doped vanadium-molybdenum oxide nanolayer shelling over two-dimensional cobalt nanosheets (2D CopS-VMoOx NSs) was synthesized via a facile approach. The formation of such a unique 2D core@shell structure together with unusual sulfur doping effect increased the electrochemically active surface area and provided excellent electric conductivity, thereby boosting the activities for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). As a result, only low overpotentials of 73 and 274 mV were required to achieve a current response of 10 mA cm(-2) toward HER and OER, respectively. Using the 2D Co@S-VMoOx NSs on nickel foam as both cathode and anode electrode, the fabricated electrolyzer showed superior performance with a small cell voltage of 1.55 V at 10 mA cm(-2) and excellent stability. These results suggested that the 2D Co@S-VMoOx NSs material might be a potential bifunctional catalyst for green hydrogen production via electrochemical water splitting.
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