Facile and Large-Area Preparation of Porous Ag3PO4 Photoanodes for Enhanced Photoelectrochemical Water Oxidation

Photoelectrochemical (PEC)water splitting is a promising approach for renewable energy, where the development of efficient photoelectrodes, especially photoanodes for water oxidation is still challenging. In this paper, we report the novel solution-processed microcrystalline Ag3PO4 photo anodes with tunable porosity depending on the reaction time. These porous Ag3PO4 films were grown on large-area (4.5 X 4.5 cm(2)) silver substrates via an air-exposed and room temperature immersion reaction.:Enhanced light absorption abilities were exhibited by the Synthesized Ag3PO4 films with optimized porosity resulted from prolonged reaction times (>= 20 h), due to which appreciable:Water splitting performance was demonstrated when they were utilized as photoanodes. Particularly, the highly wporon 20 h Ag3PO4 photoanode presented a photocurrent density of around: 4.32 mA/m(2), which is nearly three times higher than that of the nonporous 1 h Ag3PO4 photoanode (1.48 mA/cm(2)) at 11V vs Ag/AgCI Moreover, superior stability of the 20 h Ag3PO4 photoanode has also been confirmed by the 5 h successive:PBC water-splitting experiment Therefore, both the scalable and facile fabrication method, and considerable photoactivity and stability of these Ag3PO4 photoanodes together suggest their great potential for efficient solar -to-fuel energy conversion and other: PEC applications.