光电化学
材料科学
等离子体子
光电子学
表面状态
纳米技术
过程(计算)
化学工程
化学
曲面(拓扑)
电化学
计算机科学
电极
物理化学
数学
工程类
操作系统
几何学
作者
Ruikai Wang,Zhichao Hao,Haiyan Li,Chenghui Xia,Bohua Dong,Cao Lu
标识
DOI:10.1016/j.colsurfa.2024.133647
摘要
Optimizing the interfacial action of photoanode for photoelectrochemical (PEC) behavior to facilitate charge transport is essential for enhancing solar-to-fuel efficiency. Herein, a typical CuWO4/NiFe-LDH/Ag photoanode was reported and an alternative pathway for charge transfer in the PEC process through surface states mechanism was elucidated. In particular, the layer double hydroxides (NiFe-LDH) acted as charge-transfer agents to facilitate the transfer of photogenerated carriers; while the surface plasmon resonance (SPR) effect of the Ag provided hot electrons, which increased the carrier concentration and promoted the charge separation. The influence of presence of surface states on the PEC process was systematically illustrated. Experimental results indicated that the optimized CuWO4/NiFe-LDH/Ag photoanode displayed a photocurrent that was more than an order of magnitude larger than that of the pure CuWO4 (increasing from 0.30 mA cm−2 to 1.45 mA cm−2 at 1.23 V vs. RHE), accompanied by favorable electrochemical impedance and stability (maintaining 92.4%). Importantly, increasing the available filled surface states could be beneficial in enhancing the PEC behavior. This work provided additional insights into photoanode charge transport in PEC processes.
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