Understanding Bridging Sites and Accelerating Quantum Efficiency for Photocatalytic CO2 Reduction

The S-vacancies result in the change of d-band electronic state of Mo. An internal quantum efficiency of 94.01% at 380 nm for photocatalytic CO 2 reduction reaction (CO 2 RR). The Mo–S bridging bonds optimize adsorption energies and accelerate CO 2 RR kinetics.