光电流
材料科学
钒酸铋
分解水
电解质
光电子学
纳米技术
化学工程
催化作用
电极
光催化
化学
生物化学
物理化学
工程类
作者
Zhidong Liu,Zhibin Xie,Weibang Li,Hafiz Sartaj Aziz,Muhammad Abbas,Zhaoke Zheng,Zhenghua Su,Ping Fan,Xingye Chen,Guangxing Liang
出处
期刊:Materials
[MDPI AG]
日期:2023-04-27
卷期号:16 (9): 3414-3414
摘要
Photoelectrochemical (PEC) water splitting in a pH-neutral electrolyte has attracted more and more attention in the field of sustainable energy. Bismuth vanadate (BiVO4) is a highly promising photoanode material for PEC water splitting. Additionally, cobaltous phosphate (CoPi) is a material that can be synthesized from Earth’s rich materials and operates stably in pH-neutral conditions. Herein, we propose a strategy to enhance the charge transport ability and improve PEC performance by electrodepositing the in situ synthesis of a CoPi layer on the BiVO4. With the CoPi co-catalyst, the water oxidation reaction can be accelerated and charge recombination centers are effectively passivated on BiVO4. The BiVO4/CoPi photoanode shows a significantly enhanced photocurrent density (Jph) and applied bias photon-to-current efficiency (ABPE), which are 1.8 and 3.2 times higher than those of a single BiVO4 layer, respectively. Finally, the FTO/BiVO4/CoPi photoanode displays a photocurrent density of 1.39 mA cm−2 at 1.23 VRHE, an onset potential (Von) of 0.30 VRHE, and an ABPE of 0.45%, paving a potential path for future hydrogen evolution by solar-driven water splitting.
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