A minireview on electrochemical CO2 conversion based on carbonate/bicarbonate media

EES catalysis Pub Date : 2024-01-18 DOI:10.1039/D3EY00287J
Tiehuai Li and Minhua Shao
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Abstract

Direct electrochemical CO2 conversion in carbonate/bicarbonate based CO2 capture media has emerged as a promising technology for integrating carbon capture and CO2 electroreduction processes in recent years, garnering significant attention from researchers owing to its high energy efficiency and carbon efficiency. For a holistic understanding of the development status of this field, this minireview summarizes a series of studies on the mechanism of carbonate/bicarbonate electrolyzers. Detailed mechanisms of the electrochemical conversion of carbonate/bicarbonate, the evolution of electrolyzers, and factors influencing the performance of electrolyzers are introduced. A summary of carbonate/bicarbonate electrolyzers' performance is also provided. Representative systems and materials for regulating the selectivity towards various products (e.g., CO, formate, methane, ethylene, and ethanol) and the cell voltage are highlighted. Furthermore, the challenges and future opportunities in this research area are also discussed.

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基于碳酸盐/碳酸氢盐介质的二氧化碳电化学转化小视图
近年来,以碳酸盐/碳酸氢盐为基础的二氧化碳捕集介质中的二氧化碳直接电化学转化技术已成为一种将碳捕集与二氧化碳电还原过程相结合的前景广阔的技术,因其高能效和碳效率而备受研究人员的关注。为全面了解该领域的发展现状,本微综述总结了一系列关于碳酸盐/碳酸氢盐电解槽机理的研究。介绍了碳酸盐/碳酸氢盐电化学转化的详细机理、电解槽的演变以及影响电解槽性能的因素。还对碳酸盐/碳酸氢盐电解槽的性能进行了总结。重点介绍了调节各种产品(如一氧化碳、甲酸盐、甲烷、乙烯和乙醇)选择性和电池电压的代表性系统和材料。此外,还讨论了这一研究领域的挑战和未来机遇。
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Back cover Correction: High photocatalytic yield in the non-oxidative coupling of methane using a Pd–TiO2 nanomembrane gas flow-through reactor Embedding the intermetallic Pt5Ce alloy in mesopores through Pt–C coordination layer interactions as a stable electrocatalyst for the oxygen reduction reaction† Efficient CO2-to-CO conversion in dye-sensitized photocatalytic systems enabled by electrostatically-driven catalyst binding† Green energy driven methane conversion under mild conditions
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