分解水
析氧
过电位
X射线光电子能谱
磷化物
材料科学
阴极
拉曼光谱
催化作用
氢氧化物
化学工程
阳极
金属
无机化学
化学
电化学
电极
光催化
冶金
物理化学
光学
工程类
物理
生物化学
作者
Chao Song,Yi Liu,Yuchao Wang,Shuaihao Tang,Wenkui Li,Qian Li,Jian Zeng,Lei Chen,Hongcheng Peng,Yongpeng Lei
标识
DOI:10.1007/s40843-020-1566-6
摘要
It is a great challenge to develop highly active oxygen evolution reaction (OER) electrocatalysts with superior durability. In this study, a NiFe layered double hydroxide-decorated phosphide (NiFe LDH@CoP/NiP3) was constructed to display satisfactory OER activity and good stability for water splitting in alkaline media. At an overpotential of 300 mV, NiFe LDH@CoP/NiP3 achieved a current density of 82 mA cm−2 for the OER, which was 9.1 and 2.3 times that of CoP/NiP3 and NiFe LDH, respectively. Moreover, the reconstruction behavior, during which oxyhydroxides formed, was studied by a combination of X-ray photoelectron spectroscopy, Raman spectroscopy, and scanning electron microscopy. A synergistic effect between NiFe LDH and CoP/NiP3 was also observed for the hydrogen evolution reaction. Furthermore, when NiFe LDH@CoP/NiP3 acted as both the cathode and anode for overall water splitting, a high current density of 100 mA cm−2 was maintained for more than 275 h. In addition, under Xe light irradiation, a solar to hydrogen efficiency of 9.89% was achieved for solar-driven water splitting. This work presents the coupling of different active compositions, and can provide a reference for designing bifunctional electrocatalysts.
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