Single site anchored BiOBr nanosheets for visible-light-driven CO2 Reduction

Abstract

Carbon dioxide (CO2) reduction is important for enviormental protection, reducing climate warming trends and energy conversion and storage. Photocatalytic CO2 reduction reaction (CO2RR) in visible light is a highly important green route for this target. The variation of active sites on vairous semiconductor have been extensively studied. Exploring new routes for CO2RR is highly desired. Herein, we successfully loaded single tungsten atomic oxide (STAO) on BiOBr substrate. A visible-light-driven photocatalytic CO2RR is achieved by STAO/BiOBr, and the stability has been realized. The CO production of STAO/BiOBr was more than one time larger than that of bare BiOBr and CH4 is also realized. The photo-electric performance of STAO/BiOBr is much different with that of bare BiOBr. By investigating the active sites on single site anchored BiOBr base, the single sites of tungsten played as reductive active sites for CO2 to replace Bi atoms on bare BiOBr. This study sheds lights for photocatalytic CO2RR by single atomic sites through single metallic atom oxides.