1. Phosphating-induced charge transfer on CoO/CoP interface for alkaline H2 evolution
- Author
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Lei Chen, Lian Sun, Yongpeng Lei, Zhiyan Chen, Qian Li, Tong Ye, Yuchao Wang, Limiao Chen, Qiu-Mei Wu, Xin Zhao, Jian Zeng, Liang Xu, and Qichen Wang
- Subjects
Work (thermodynamics) ,Materials science ,Energy conversion efficiency ,Heterojunction ,02 engineering and technology ,General Chemistry ,Overpotential ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Catalysis ,Metal ,Electron transfer ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,0210 nano-technology ,Current density - Abstract
Designing non-noble metal electrocatalysts toward alkaline hydrogen evolution reaction (HER) with high performance at a large current density is urgent. Herein, a CoO/CoP heterostructure catalyst (termed POZ) was designed by a phosphating strategy. The strong electron transfer on the interface of CoO/CoP was experimentally and theoretically proven. POZ showed a low overpotential of 236 mV at 400 mA/cm2, which was 249 mV lower than non-phosphated sample. It also exhibited a remarkable solar-to-hydrogen conversion efficiency of 10.5%. In this work, the construction of CoO/CoP interface realized by a simple phosphating strategy could provide an important reference to boost the HER performance on those materials not merely metal oxides.
- Published
- 2021