期刊
ENERGY & FUELS
卷 35, 期 17, 页码 14169-14176出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.1c01971
关键词
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资金
- Anhui Provincial Natural Science Foundation [1808085ME143]
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) [2021-KF-20]
Doping rare-earth metals or introducing carbon into transition metal phosphides can enhance the performance and stability of water electrolysis. Ce-doped CoMoP/MoP@C exhibited superb bifunctional HER and OER catalytic performance under alkaline conditions.
Doping rare-earth metals or introducing carbon into transition metal phosphides (TMPs) can promote the property and stability of water electrolysis. An original composite nanostructure, cerium-doped and carbon-coated CoMoO4 (Ce-doped CoMoO4@C), was obtained by a simple hydrothermal and annealing process successively. Subsequently, chemical vapor deposition (CVD) was adopted to synthesize carbon-coated and cerium-doped CoMoP/MoP (Ce-doped CoMoP/MoP@C) with diammonium hydrogen phosphate as the phosphorus source. Ce-doped CoMoP/MoP@C displayed superb bifunctional HER and OER catalytic performance under alkaline conditions. The overpotential eta(10), Tafel slope, and double-layer capacitance (C-dl) for the OER were 287.0 mV, 74.4 mV dec(-1), and 10.44 mF cm(-2), while for the HER, these values were 188.0 mV, 72.2 mV dec(-1), and 33.00 mF cm(-2), respectively. Meanwhile, only 1.59 V (@10 mA cm(-2)) was needed to drive the entire water splitting. In addition, there was no apparent attenuation after electrolytic catalysis for 12 h continuously. The superb performance and endurance gave credit to the cooperative effect between carbon materials and metal phosphides and the optimized electronic structure by the incorporation of the Ce element.
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