文献类型：期刊文献

英文题名：Stable bifunctional nanoflower-structured NiMnCu-LDH catalyst for selective and efficient methanol-to-formate electrocatalytic conversion and hydrogen evolution reaction

作者：Wang, Yiping[1];Xu, Yixin[1];Gao, Zhaoqun[1];Ullah, Siraj[1];Li, Ying[1];Su, Na[1];Hu, Shuozhen[1];Zhang, Xinsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China

年份：2025

卷号：158

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20252918808986);WOS:【SCI-EXPANDED(收录号:WOS:001534858400002)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Grant No. 22272051) . The authors thank GAMRY Instruments for donating the Reference 3000 potentiostat. The authors also thank the Research Center of Analysis and Test of East China Uni-versity of Science and Technology for the help with the characterization.

语种：英文

外文关键词：Bifunctional electrocatalyst; NiMnCu-LDH; Electron transfer; Methanol-to-formate electrooxidation reaction; Hydrogen evolution reaction

摘要：Low formate Faradaic efficiency (FE) and poor methanol-to-formate electrooxidation reaction (MOR) stability under high potentials restrict commercialization of coupling MOR with hydrogen evolution reaction (HER), which generates hydrogen and high-value-added formate simultaneously with low energy consumption. Herein, we synthesized a nanoflower-structured NiMnCu-LDH as bifunctional catalyst for both MOR and HER. Adding Cu suppresses oxygen evolution reaction (OER) and elevates Ni3+ content by promoting electron transfer from Ni2+ to Mn3+. NiMnCu-LDH exhibits high MOR activity with potentials of 1.33/1.36 VRHE at 10/100 mA cm-2, high formate selectivity with over 95 % FE at potential exceeding 1.50 VRHE, and superior durability for at least 120 h in alkaline media. Furthermore, NiMnCu-LDH exhibits excellent HER performance with an overpotential of 76.45 mV at 10 mA cm-2 with the existence of methanol. Producing hydrogen and formate is successively achieved by applying NiMnCu-LDH as both anode and cathode simultaneously for methanol electrolysis in a non-diaphragm electrolyzer.