WO₃ as a photoanode has the disadvantage of poor charge separation and low solar utilization. It is necessary to surmount these weaknesses to improve its performance. In this work, we doped FeOOH with F to prepare F: FeOOH/BiVO₄/WO₃ photoanode by the facile method. According to the photoelectrochemical evaluation, in the phosphate buffer electrolyte, the maximum photocurrent of the composite photoanode (3.1 mA/cm²) is 7 times and 9 times that of WO₃ and BiVO₄, respectively. The improvement is ascribable to F:FeOOH can extract holes and improve charge transfer. Compared with BiVO₄/WO₃ and original components, F:FeOOH/BiVO₄/WO₃ photoanode enhances charge separation and also shows good stability and electrons lifetime. Additionally, F-doped FeOOH has better OER catalytic performance than FeOOH according to theoretical calculation, which is consistent with experimental results. This work might extend application of cocatalyst in decomposition PEC water splitting.

WO ₃作为光阳极具有电荷分离差和太阳能利用率低的缺点。有必要克服这些弱点以提高其性能。在这项工作中，我们用 F 掺杂 FeOOH，通过简便的方法制备 F: FeOOH/BiVO ₄ /WO _{3 光}阳极。根据光电化学评价，在磷酸盐缓冲电解质中，复合光阳极的最大光电流（3.1 mA/cm ²）分别是WO ₃和BiVO _{4 的}7倍和9倍。这种改进归因于 F:FeOOH 可以提取空穴并改善电荷转移。与BiVO ₄ /WO ₃和原始组分相比，F:FeOOH/BiVO₄ /WO _{3 光}阳极增强了电荷分离并且还显示出良好的稳定性和电子寿命。此外，根据理论计算，F掺杂的FeOOH比FeOOH具有更好的OER催化性能，这与实验结果一致。这项工作可能会扩展助催化剂在分解 PEC 水分解中的应用。