Pt Single Atoms as Co?Catalysts on CdS?Sensitized Single?Crystalline TiO₂ Nanoflakes for Enhanced Visible Light Photocatalytic H₂ Generation

Studies on single-atom catalysts (SACs) with individually isolated metal atoms anchored specific supports have gained great interest in photocatalysis due to their enhanced catalytic activity and optimal atom utilization. By providing the optimized number of active sites enhancing intrinsic activity, SACs afford a distinctive platform for at atomic level. In this study, we investigate photocatalytic H2 generation Pt single (SAs) CdS-sensitized crystalline anatase TiO2 nanoflakes (ATNF) visible spectral range. Vertically-aligned ATNF were synthesized fluorine-doped tin oxide substrates by hydrothermal process, which further sensitized CdS nanoislands (NIs) using successive ionic layer adsorption reaction (SILAR) technique. Finally, "dark"-deposition approach was used successfully anchor SAs ATNF. Under conditions, highest evolution Pt-anchored 17.8 ?L h-1 under light illumination, is 15.8, 7.5, 6.7-fold higher than bare CdS/FTO, PtSA/CdS/FTO, ATNF, respectively. Overall, density plays vital role via strong trapping photogenerated electrons significantly improves efficiency electron-hole separation, making PtSA/ATNF efficient solar-driven photocatalysts.