文献类型：期刊文献

英文题名：Efficient and Safe Membrane-Free Flow Electrolyzer for Formate Synthesis and Direct Fuel Cell Integration

作者：Li, Yicheng[1];Delmo, Ernest Pahuyo[2];Li, Xingqiu[1];Liu, Ya[1];Dai, Sheng[3,4];Tang, Xuan[3,4];Zhu, Zhuoying[5];Liu, Daobin[5];Tian, Pengfei[1];Zhao, Ming[6];Zhang, Yu[1];Xuan, Fu-Zhen[1];Shao, Minhua[2,7,8]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai, Peoples R China;[2]Hong Kong Univ Sci & Technol, Energy Inst, Dept Chem & Biol Engn, Hong Kong, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Shanghai, Peoples R China;[5]Univ Sci & Technol China, State Key Lab Precis & Intelligent Chem, Hefei, Anhui, Peoples R China;[6]Natl Univ Singapore, Dept Mat Sci & Engn, Singapore, Singapore;[7]Hong Kong Univ Sci & Technol, Fok Ying Tung Res Inst, Guangzhou Key Lab Electrochem Energy Storage Techn, Guangzhou, Peoples R China;[8]Hong Kong Univ Sci & Technol, CIAC HKUST Joint Lab Hydrogen Energy, Kowloon, Hong Kong, Peoples R China

年份：2026

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20262821073774);Scopus(收录号：2-s2.0-105044131331);WOS:【SCI-EXPANDED(收录号:WOS:001814467700001)】；

基金：This work was supported by the National Natural Science Foundation of China (22479048 and 22109044), Natural Science Foundation of Shanghai, China (22ZR1418500), the Science and Technology Commission of Shanghai Municipality (24DX1400200), the Program of Introducing Talents of Discipline to Universities (B16017), Fundamental and Interdisciplinary Disciplines Breakthrough Plan of the Ministry of Education of China (JYB2025XDXM404), start-up funds from the East China University of Science and Technology, and the Fundamental Research Funds for the Central Universities. This work was also supported by the Research Grant Council (JLFS/P-602/24) and Innovation and Technology Commission via the Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Hong Kong Branch of the National Precious Metals Material Engineering Research Center of the Hong Kong Special Administrative Region, and Guangzhou Science and Technology Bureau (2024A03J0609).

语种：英文

外文关键词：electrocatalysis; formate production; membrane-free flow electrolyzer; methanol oxidation; CO2 reduction

摘要：Membrane-free electrocatalysis represents a promising alternative to conventional systems, yet the potential H-2/O-2 intermixing stands as the foremost barrier to practical implementation. Here, we report an efficient and safe membrane-free flow electrolyzer that kinetically matches methanol oxidation and CO2 reduction for symmetric formate production. To suppress H-2/O-2 generation, we developed low-cost, separate catalysts that can operate compatibly in a single electrolyte. When stabilized by lattice-matched FeOOH, Ni-5(II)O(OH)(8), a new material synthesized for the first time, addresses the common issue of Ni-based catalysts being oxidized to NiOOH. This feature effectively suppresses competing O-2 evolution, enabling similar to 100% methanol-to-formate conversion within an expanded potential window. In parallel, SO42- incorporated Bi2O2CO3 shields methanol from the electrolyte while promoting highly exclusive CO2 reduction to formate at evaluated current densities. Thus, the system achieves >195% overall formate Faradaic efficiency over a record-wide current density range (2.0 to 424.6 mA cm(-2)) with minor H-2/O-2 production rates (e.g., H-2: 1.6 mL h(-1), O-2: 0.5 mL h(-1), at 200 mA cm(-2)), demonstrating excellent production efficiency and safety under fluctuating renewable energy input. The produced formate-rich solution can be further utilized in a high-performance fuel cell. This work establishes a low-cost and safe CO2-to-power loop route for sustainable energy conversion.