Abstract
Owing to the large bandgap and inappropriate surface absorption energy, few reports can achieve commercially valuable carbon products, especially alkanes, through CO2 photoreduction. Herein, a new narrow band-gapped perovskite oxysulfide, Ba2Bi_(1+x)Ta_(1-x)O_(6-y)S_y, is developed for CO2 photoreduction to produce ethane. It enhances the charge separation, facilitates the charge transfer, and reduces the reaction energy to ~*CH3, promoting phtotocatalytic CO2 reduction towards C2H6. The obtained perovskite oxysulfide has a C2H6 yield of over 5.4 μmol g~(-1) h~(-1) with the yield-based selectivity of 30.2% and the electron-based selectivity of 65.6%. It also has outstanding stability for both photocatalytic water oxidation and CO2 reduction. The novel design and construction of a photocatalyst in this work could open new possibility for the practical application of artificial photosynthesis.
NSTL