过氧化氢
光催化
纳米纤维
人工光合作用
材料科学
量子产额
制氢
化学工程
可见光谱
光合作用
分解水
产量(工程)
化学
氢
纳米技术
光化学
催化作用
光电子学
有机化学
复合材料
物理
光学
工程类
生物化学
荧光
作者
Kai Wang,Jingping Li,Xiufan Liu,Qiang Cheng,Yue Du,Dian Li,Guohong Wang,Bin Liu
标识
DOI:10.1016/j.apcatb.2023.123349
摘要
Developing low-cost and durable photocatalysts for sacrificial-agent-free artificial photosynthesis of hydrogen peroxide is challenging. In this work, an all-inorganic hybrid nanofiber step-scheme photocatalyst, WO3/NiS (WONS), was constructed for efficient generation of hydrogen peroxide in pure water at ambient condition. The optimal photocatalyst, WONS35 % (with 35 wt% of NiS), exhibits remarkable efficiency in producing H2O2 at a rate of 2.59 mmol gcatalyst−1 h−1 under visible light illumination, surpassing the H2O2 production rate of pristine WO3 and NiS by 11.3 and 16.7 times, respectively. WONS35 % demonstrates an apparent quantum yield of 4.97 % at a wavelength of 420 nm. The significantly enhanced photocatalytic performance can be ascribed to the synergistic effect of the improved charge separation and transfer induced by the step-scheme pathway and the highly selective two-electron oxygen reduction reaction (ORR) over the hybrid nanofiber photocatalyst.
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