Construction of a gold-cobalt alloy catalyst to enhance the green reduction of carbon dioxide. (November 2022)

• Record Type: Journal Article
• Authors: Zhou, Yuheng; Wang, Xiaohui; Huang, Xubo; Deng, Hui; Hu, Yuntao
• Is Part Of: Journal of CO₂ utilization. Volume 65(2022)
• Publication Date: 2022-11
• Subjects: Au-Co alloy -- CO2 reduction -- Benzyl alcohol -- Photothermal catalysis -- Hydrogen-free reaction; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2022.102245
• Languages: English
• ISSNs: 2212-9820

Abstract

Abstract: Facilitating carbon neutrality to mitigate the greenhouse effect by an efficient means has great environmental and social value. In this research, the Au-Co catalyst is synthesized with a developed non-aqueous solvent strategy. By tuning the ratio of the bimetallic composition, it represents a prominent catalytic activity in the reduction of CO2 with benzyl alcohol as the hydrogen donor. By means of the anaerobic oxidation of benzyl alcohol, CO2 can be reduced to methanol as well as methyl benzoate as the main product with a high turnover frequency (1079 h −1 ) at 220 °C. Taking advantage of a series of characterizations and DFT calculation, it is revealed that the catalytic system constructed in this research promotes the adsorption and activation of CO2 . These results demonstrate a feasible route to develop hydrogen-free utilization of CO2 to achieve environmental carbon neutrality in the future. Graphical Abstract: ga1 Highlights: AuCo alloy was prepared as the photothermal catalysts with the help of chloroform solution. The prepared catalysts exhibited an excellent catalytic activity in the reduction of CO2 under photothermal conditions. Benzyl alcohol was used as the hydrogen-free reductant in a mild reductive condition. Catalysts with different Au-Co ratio have different performances in the CO2 reduction. The highest TOF value can be up to 1079 h −1 with methanol and methyl benzoate as the main product.