Cheng Siqiang, Cheng Yun, Zhou Taoyun, Li Shilin, Xie Dong, Li Xinyu
School of Information, Hunan University of Humanities, Science and Technology, Loudi 417000, China.
Key Laboratory of Low-Dimensional Structural Physics and Application, Education Department of Guangxi Zhuang Autonomous Region, College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, China.
Micromachines (Basel). 2025 Jul 27;16(8):866. doi: 10.3390/mi16080866.
Despite significant progress in photoelectrochemical (PEC) water splitting, high fabrication costs and limited efficiency of photoanodes hinder practical applications. Bismuth vanadate (BiVO), with its low cost, non-toxicity, and suitable band structure, is a promising photoanode material but suffers from poor charge transport, sluggish surface kinetics, and photocorrosion. In this study, porous monoclinic BiVO films are fabricated via a simplified successive ionic layer adsorption and reaction (SILAR) method, followed by borate treatment and PEC deposition of NiFeO. The resulting B/BiVO/NiFeO photoanode exhibits a significantly enhanced photocurrent density of 2.45 mA cm at 1.23 V vs. RHE-5.3 times higher than pristine BiVO. It also achieves an ABPE of 0.77% and a charge transfer efficiency of 79.5%. These results demonstrate that dual surface modification via borate and NiFeO is a cost-effective strategy to improve BiVO-based PEC water splitting performance. This work provides a promising pathway for the scalable development of efficient and economically viable photoanodes for solar hydrogen production.
尽管光电化学（PEC）水分解取得了显著进展，但光阳极的高制造成本和有限效率阻碍了其实际应用。钒酸铋（BiVO）因其低成本、无毒且具有合适的能带结构，是一种有前景的光阳极材料，但存在电荷传输差、表面动力学迟缓以及光腐蚀等问题。在本研究中，通过简化的连续离子层吸附和反应（SILAR）方法制备多孔单斜BiVO薄膜，随后进行硼酸盐处理和NiFeO的PEC沉积。所得的B/BiVO/NiFeO光阳极在1.23 V vs. RHE时表现出显著增强的光电流密度，为2.45 mA cm，比原始BiVO高5.3倍。它还实现了0.77%的ABPE和79.5%的电荷转移效率。这些结果表明，通过硼酸盐和NiFeO进行双表面改性是提高基于BiVO的PEC水分解性能的一种经济有效的策略。这项工作为高效且经济可行的用于太阳能制氢的光阳极的可扩展开发提供了一条有前景的途径。
