Meng Xiangyu, Xu Shiming, Zhang Chenchen, Feng Pengfei, Li Rui, Guan Hongxia, Ding Yong
State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China.
School of Science and Technology, Georgia Gwinnett College, Lawrenceville, GA, 30043, USA.
Chemistry. 2022 Sep 12;28(51):e202201407. doi: 10.1002/chem.202201407. Epub 2022 Aug 10.
The efficiency of photocatalytic overall water splitting reactions is usually limited by the high energy barrier and complex multiple electron-transfer processes of the oxygen evolution reaction (OER). Although bismuth vanadate (BiVO ) as the photocatalyst has been developed for enhancing the kinetics of the water oxidation reaction, it still suffers from challenges of fast recombination of photogenerated electron-hole pairs and poor photocatalytic activity. Herein, six M -Co Prussian blue analogues (PBAs) (M=Mn, Fe, Co, Ni, Cu and Zn) cocatalysts are synthesized and deposited on the surface of BiVO for boosting the surface catalytic efficiency and enhancing photogenerated carries separation efficiency of BiVO . Six M -Co PBAs@BiVO photocatalysts all demonstrate increased photocatalytic water oxidation performance compared to that of BiVO alone. Among them, the Co-Co PBA@BiVO photocatalyst is employed as a representative research object and is thoroughly characterized by electrochemistry, electronic microscope as well as multiple spectroscopic analyses. Notably, BiVO coupling with Co-Co PBA cocatalyst could capture more photons than that of pure BiVO , facilitating the transfer of photogenerated charge carriers between BiVO and Co-Co PBA as well as the surface catalytic efficiency of BiVO . Overall, this work would promote the synthesis strategy development for exploring new types of composite photocatalysts for water oxidation.
光催化全分解水反应的效率通常受到析氧反应（OER）的高能量势垒和复杂多电子转移过程的限制。尽管钒酸铋（BiVO₄）作为光催化剂已被开发用于提高水氧化反应的动力学，但它仍然面临光生电子-空穴对快速复合和光催化活性差的挑战。在此，合成了六种M-Co普鲁士蓝类似物（PBAs）（M = Mn、Fe、Co、Ni、Cu和Zn）助催化剂，并沉积在BiVO₄表面，以提高BiVO₄的表面催化效率和增强光生载流子的分离效率。与单独的BiVO₄相比，六种M-Co PBAs@BiVO₄光催化剂均表现出提高的光催化水氧化性能。其中，Co-Co PBA@BiVO₄光催化剂被用作代表性研究对象，并通过电化学、电子显微镜以及多种光谱分析进行了全面表征。值得注意的是，BiVO₄与Co-Co PBA助催化剂耦合能够比纯BiVO₄捕获更多光子，促进了光生电荷载流子在BiVO₄和Co-Co PBA之间的转移以及BiVO₄的表面催化效率。总体而言，这项工作将推动用于探索新型水氧化复合光催化剂的合成策略发展。
