Promotion of dual-reaction pathway in CO2 reduction over Pt0/SrTiO3–δ: Experimental and theoretical verification

The H2 evolution is generally considered a competing reaction in photocatalytic CO2 reduction (CO2RR) using H2O as the proton source. However, reducing gas generated from splitting can be source CO2RR under enhanced dynamic role of thermal effect. reverse water shift (RWGS) reaction, hydrogenation should occur photothermal environment owing to thermodynamically and kinetically favorable. Herein, nanostructured metal-semiconductor contact consisting Pt nanoparticles (NPs) supported on SrTiO3–δ nanosheets with rich oxygen vacancies (Pt-OVs-STO) was constructed for investigating its feasibility efficiency RWGS Our experimental results substantiate that by effectively contributes over Pt-OVs-STO system. Pt0 NPs not only efficiently facilitate surface charge transfer, but also lower energy barrier O–H bond breaking, releasing, thereby showing an outstanding performance. strong interaction between has been extensively demonstrated series characterizations density functional theory calculations. This work elucidates relation Pt0/SrTiO3–δ structure catalytic provides new perspectives subsequent CO2RR.