Abstract
This study investigates the effect of selective photodeposition of reduction and oxidation cocatalysts (Ag, Ni, and Co) on ASTO, enabling efficient charge separation and directed activation of CO2. Photocatalytic tests revealed that CO was the main product over the Ag/ASTO/Co sample, with a yield of 1.61 μmol·g-1·h-1 and a selectivity of 63.4%. The introduction of Ni increased the CO yield by more than nine times (up to 15.2 μmol·g-1·h-1) and improved selectivity to 79.9%, while H2 evolution and CH4 formation reactions remained suppressed. The obtained results demonstrate a pronounced synergistic effect between Ag, Ni, and Co and propose an effective strategy for designing selective and efficient photocatalysts for CO2 reduction in aqueous media without additional reagents.