光电流
析氧
分解水
化学
异质结
氢氧化物
光催化
煅烧
载流子
锰
可见光谱
光电化学
光化学
催化作用
能量转换效率
钴
化学工程
光电子学
无机化学
电极
材料科学
电化学
物理化学
生物化学
有机化学
工程类
作者
Haolun Li,Mingxin Lyu,Xingxing Cheng,Yanhua Lai,Zhili Dong
标识
DOI:10.1016/j.jcat.2023.115203
摘要
To improve the charge recombination and poor oxygen evolution reaction (OER) kinetics of BiVO4, in this paper, a high-performance CoMn-LDH/MoO3/BiVO4 photoanode was synthesized by a simple electrodeposition and calcination method. CoMn-LDH/MoO3/BiVO4 shows a photocurrent density of 3.78 mA cm−2 at 1.23 V vs. RHE, which is 3.78 times higher than that of pure BiVO4 with negative shift onset potentials of 330 mV. The maximum applied bias photon-to-current efficiency (ABPE) and incident photon-to-current conversion efficiency (IPCE) are 1.24 % and 55.5 %, respectively, which are 13.8 and 12.5 times higher than those of pure BiVO4. In-depth studies demonstrate that the MoO3/BiVO4 heterojunction can better drive the transfer of photogenerated carriers and suppress bulk charge recombination, CoMn-LDH improves the OER kinetics and broadens the absorption of visible light, their synergistic effect significantly enhances charge separation and light harvesting of BiVO4. This work provides a facile electrodeposition method to fabricate highly efficient photoanodes for solar-driven water splitting.
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