期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 7, 页码 6890-6899出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b15653
关键词
metal phosphides; overall water splitting; N-doped carbon; nanowires; synergistic effects
资金
- NSFC [21576288, 91127040, 21173269, 21573286, U1662104]
- Science Foundation of China University of Petroleum, Beijing [2462015YQ0304]
- Specialized Research Fund for the Doctoral Program of Higher Education [20130007110003]
- Ministry of Science and Technology of China [2011BAK15B05]
- Open Fund of the State Key Laboratory of Chemical Resource Engineering, Beijing
The development of designing and searching inexpensive electrocatalysts with high activity for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is significant to enable water splitting as a future renewable energy source. Herein, we synthesize a new CoP(MoP)-CoMoO3 heterostructure coated by a N-doped carbon shell [CoP(MoP)-CoMoO3@CN] via thermal decomposition and phosphatizing of the CoMoO4.0.9H(2)O nanowires encapsulated in N-doped carbon. At 10 mA.cm(-2), this CoP(MoP)-CoMoO3@CN nanocomposite exhibits superior electrocatalytic activity at low overpotentials of 296 mV for OER and 198 mV for HER in alkaline media. More importantly, we achieve a current density of 10 mA.cm(-2) at 1.55 V by using this CoP(MoP)-CoMoO3@CN as both cathode and anode for overall water splitting. This promising performance could be due to the high activity of CoP(MoP)-CoMoO3 and the good conductivity of the external mesoporous N-carbon shell, which makes the CoP(MoP)-CoMoO3@CN nanowires a competitive alternative to noble-metal-based catalysts for water splitting.
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