光电流
化学
氢氧化物
异质结
热液循环
电极
化学工程
分解水
复合数
分解
水热反应
纳米技术
无机化学
光催化
光电子学
催化作用
复合材料
材料科学
物理化学
工程类
生物化学
有机化学
作者
Bin Zhang,Mengnan Ruan,Chengyi Wang,Zhengang Guo,Zhifeng Liu
标识
DOI:10.1016/j.jelechem.2023.117388
摘要
It is an effective way to improve the photoanode photoelectrochemical (PEC) performance by loading appropriate cocatalyst. In this work, NiCo-LDH cocatalyst was prepared by hydrothermal method on α-Fe2O3 photoanode. The results show that with the loading of NiCo-LDH, the photocurrent of the α-Fe2O3/NiCo-LDH composite photoanode at 1.23 V vs. RHE is 0.428 mA/cm2, which is 4.75 times that of the pure α-Fe2O3 electrode. At time, the starting potential of the photoanode undergoes a negative shift of about 300 mV, effectively reducing the driving force required for water oxidation. In addition, the charge separation and transfer in the photoelectrode are significantly improved by the α-Fe2O3/NiCo-LDH heterojunction and the NiCo-LDH cocatalyst, and the charge transport are further promoted. These findings provide a feasible approach to improve the application of α-Fe2O3 photoanodes in PEC decomposition of water in the future.
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