1. Construction of a self-supporting bifunctional Sn-SnSx electrocatalyst via one-step electro-deposition for formate production from coupled CO2 reduction and glucose oxidation.
- Author
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Chongyan Chen, Shuguang Shen, Jie Wang, Yongmei Liu, Xingting Guo, Lili Zhang, and Jing Li
- Subjects
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OXIDATION of glucose , *ELECTROLYTIC reduction , *CARBON dioxide reduction , *ELECTRICAL energy , *OXIDATION of water , *CATHODES - Abstract
The electroconversion of carbon dioxide (CO2) into value-added chemicals has attracted widespread attention worldwide. Exploring efficient catalysts and designing reasonable reactants have become popular research directions in the strategy of coupling anode and cathode reactions. Herein, we report the construction of a self-supporting bifunctional Sn-SnSx electrode using a one-step electrodeposition method. The valence states of Sn at the Sn-SnSx surface are Sn4+, Sn2+ and Sn0, and the electrode exhibits excellent performances for the carbon dioxide reduction reaction (CO2RR) and glucose oxidation reaction (GOR), respectively. For the CO2RR, the Sn-SnSx electrode produced formate with a faradaic efficiency (FE) of 93.3% and a stability of 36 h. Meanwhile, tin sulfides were first applied in anodic oxidation and a high FE of 88% was achieved for formate production in the GOR. Impressively, Sn-SnSx as a bifunctional electrode achieved co-production of formate at both the anode and cathode in the integrated electrolyzer coupled with the CO2RR and GOR. This coupling process combines the technical means of "electrooxidation-electroreduction" with the choice of reactants "CO2-C6H12O6", resulting in FE values of 93.9% and 87.4% at the cathode and anode for the production of formate, as well as a 58.3% electrical energy saving for formate production in comparison with the traditional CO2RR coupled with the water oxidation reaction. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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