An interfacial W–S bond bridged Bi 2 O 2 S/W 18 O 49 S-scheme heterostructure with rich oxygen vacancies: enhancing charge transfer kinetics for CO 2 photoreduction

A W 18 O 49 /Bi 2 O 2 S S-scheme heterostructure with interfacial W–S bonds and oxygen vacancies boosts charge separation and lowers the *CO 2 -to-*COOH barrier to 0.55 eV, achieving a CO evolution rate of 35.00 µmol g −1 h −1 with 80% product selectivity.