Prussian Blue Analogues-Derived ZnFeO in CuO/ZnFeO p-n Junction for H Production.

ZnFeO is an n-type semiconductor spinel oxide with promising applications in various fields, including photocatalysis. This study reports the successful synthesis of a novel ZnFeO derivative based on Prussian Blue Analogues (PBAs) through an electrosynthesis method. To enhance photocatalytic performance, the synthesized ZnFeO was employed as a cocatalyst in p-n junction materials, specifically CuO/ZnFeO. Our findings reveal that introducing ZnFeO could significantly improve the photocatalytic activity and hydrogen (H) production rate of the CuO/ZnFeO system compared to bare CuO. This enhancement was sustained over an extended operational period, indicating the material's potential for long-term use in photocatalytic applications. The superior performance of the ZnFeO cocatalyst is attributed to its efficient charge separation and improved light absorption properties, which collectively contribute to higher photocatalytic efficiency. This study highlights the potential of PBA-based derivative ZnFeO as an effective cocatalyst in developing advanced photocatalytic systems for sustainable hydrogen production.