Defect in reduced graphene oxide tailored selectivity of photocatalytic CO2 reduction on Cs4PbBr6 pervoskite hole-in-microdisk structure. (December 2020)

• Record Type: Journal Article
• Authors: Wang, Xuandong; Li, Kanglu; He, Jie; Yang, Jingling; Dong, Fan; Mai, Wenjie; Zhu, Mingshan
• Is Part Of: Nano energy. Volume 78(2020)
• Publication Date: 2020-12
• Subjects: CO2 reduction -- Cs4PbBr6 pervoskite -- Reduced graphene oxide -- Defect -- Photocatalysis; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2020.105388
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Artificial photocatalytic conversion of CO2 into value-added and renewable fuels has been recognized as a promising approach for solving environmental problems and energy crisis. Achieving this goal, developing a photocatalyst to simultaneously manifest high efficiency, selectivity, and durability is urgent need. Herein, one of all-inorganic cesium lead halide perovskite ( viz. Cs4 PbBr6 ) with hole-in-microdisk structure hybridized with reduced graphene oxide (rGO) is reported as an effective photocatalyst for reducing of CO2 . Our results show that Cs4 PbBr6 /rGO exhibited high efficiency, selectivity, and durability of CO2 reduction capacity to CO, catalyzing at a rate of 11.4 μmol g -1 h -1 with a maintaining stability of 60 h. Residual oxygen impurities as defects in the rGO sheets are demonstrated for facilitating CO2 activation and reduction capacity to CO. This finding provides a facile pathway for designing high performance perovskite photocatalyst with high selectivity and durability with the aid of defects engineering. Graphical abstract: Taking advantage of all-inorganic perovskite (Cs4 PbBr6 ) and residual oxygen defects in reduced graphene oxide, high efficiency, selectivity and durability of CO2 reduction capacity to CO is successfully achieved. Image 1 Highlights: Cs4 PbBr6 perovskite with hole-in-microdisk (HIMD) structure hybridized with reduced graphene oxide is synthesized. HIMD Cs4 PbBr6 /rGO acts as an effective photocatalyst for CO2 photoreduction. Defects in rGO sheets are demonstrated for improving the activity and selectivity of CO2 photoreduction.