Molecular Engineering of Poly(Ionic Liquid) for Direct and Continuous Production of Pure Formic Acid from Flue Gas

• DOI: 10.1002/adma.202409390
• Publication Date: 2024-09-30T10:55:27Z
• Authors: Geng Li; Chengyi Zhang; Yong Liu; Yun Song; Weihua Guo; Libei Huang; Jianjun Su; Qiang Zhang; Yinger Xin; Tanglue Feng; Xiaohu Cao; Mingming He; Tsz Kin Kwok; Jacky W. Y. Lam; Zhong Jin; Ben Zhong Tang; Ziyun Wang; Ruquan Ye
• Keywords: Solid-state electrolyte cell; Flue gas; CO2 reduction; Poly (ionic liquids); 540; 620

Abstract Electrochemical CO 2 reduction reaction (CO RR) offers a promising approach to close the carbon cycle and reduce reliance on fossil fuels. However, traditional decoupled RR processes involve energy‐intensive capture, conversion, product separation, which increases operational costs. Here, we report development of bismuth‐poly(ionic liquid) (Bi‐PIL) hybrid catalyst that exhibits exceptional electrocatalytic performance for conversion formate. The Bi‐PIL achieves over 90% Faradaic efficiency formate wide potential range, even at low 15% v/v concentrations typical industrial flue gas. biphenyl in PIL backbone affords hydrophobicity while maintaining high ionic conductivity, effectively mitigating flooding issues. layer plays crucial role as concentrator co‐catalyst accelerates kinetics. Furthermore, demonstrate catalysts solid‐state electrolyte (SSE) electrolyzer continuous direct production pure formic acid solutions from Techno‐economic analysis suggests this integrated process can produce significantly reduced cost compared approaches. This work presents strategy overcome challenges associated with low‐concentration utilization streamline valuable liquid fuels chemicals .