Enhanced photocatalytic CO2 reduction with defective TiO2 nanotubes modified by single-atom binary metal components

A binary component catalyst consists of single atoms (SAs– Pt and Au) anchored on self-doped TiO2 nanotubes (TNTs), was developed for photocatalytic CO2 reduction. The defects introduced TNTs substrate stabilized with atomic Au via strong metal support interactions (MSI), due to which, the covalent facilitated an effective transfer photo-generated electrons from defective sites SAs, in turn enhanced separation electron–hole pairs charge-carrier transmission. Pt–Au/R-TNTs 0.33 wt% SA metals, exhibited a maximum 149 times higher performance than unmodified R-TNT total apparent quantum yield (AQY) 17.9%, which CH4 C2H6 reached 360.0 28.8 ?mol g?1 h?1, respectively. metals loading shifted oxidation path H2O •OH generation into O2 evolution, that inhibited self-oxidization photocatalyst.