Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO₃ Core–Shell Structures for Solar-Driven Water Oxidation

Abstract

High Resolution Image Download MS PowerPoint Slide This study presents a pioneering semiconductor-catalyst core–shell architecture designed to enhance photocatalytic water oxidation activity significantly. This innovative assembly involves the in situ deposition of CoFe Prussian blue analogue (PBA) particles onto SrTiO 3 (STO) and blue SrTiO 3 (bSTO) nanocubes, effectively establishing a robust p–n junction, as demonstrated by Mott–Schottky analysis. Of notable significance, the STO/PB core–shell catalyst displayed remarkable photocatalytic performance, achieving an oxygen evolution rate of 129.6 μmol g –1 h –1, with stability over an extended 9-h in the presence of S 2 O 8 2– as an electron scavenger. Thorough characterization unequivocally verified the precise alignment of the band energies within the STO/PB core–shell assembly. Our research underscores the critical role of tailored semiconductor-catalyst interfaces in advancing the realm of photocatalysis and its broader applications in renewable energy technologies.