文献类型：期刊文献

英文题名：Production of isobutyric acid via directly electrocatalytic oxidation of isobutanol on Ni(OH)2/NF in a diaphragmless electrolytic cell

作者：Liu, Yangjing Ji, Shan Wang, Hui Wang, Xuyun Ma, Xianguo Linkov, Vladimir Wang, Rongfang

第一作者：Liu, Yangjing

通信作者：Wang, XY[1];Wang, RF[1];Ji, S[2]

机构：[1]Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China;[2]Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China;[3]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[4]Univ Western Cape, South African Inst Adv Mat Chem, ZA-7535 Cape Town, South Africa

第一机构：Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China

通信机构：corresponding author), Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China;corresponding author), Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China.

年份：2026

卷号：320

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001571830800004)】；

基金：The authors would like to thank the Natural Science Foundation of Guizhou Province (Grants No. QKHJC-ZK [2023] Key 019, Grants No. QKHJC-ZD [2025] 038) for financially supporting this work.

语种：英文

外文关键词：Isobutyric acid; Electrochemical synthesis; Diaphragmless electrolytic cell; Indirect electrooxidation

摘要：This study developed an electrochemical synthesis method for isobutyric acid (IBAc) using renewable biomass-derived isobutanol (IBA) as a feedstock. A Ni(OH)2/NF electrocatalyst was synthesized via hydrothermal method and successfully implemented in a diaphragmless electrolytic cell for the electrocatalytic oxidation of IBA to IBAc. Process parameters were optimized through single-factor variable experiments, establishing optimal conditions: electrolyte pH of 14, current density of 40 mA/cm2, IBA concentration of 0.3 mol/L, and reaction time of 6 h. Under these conditions, the Faradaic efficiency reached 80 % with a yield of 60 %. The reaction mechanism was further investigated, confirming an indirect electrooxidation process mediated by Ni2+/Ni3+ redox couple. IBA follows an adsorption-oxidation-desorption mechanism on the electrocatalyst surface, completing IBAc synthesis through a four-electron transfer mechanism. Efficient IBAc extraction was achieved through hydrochloric acid acidification, ethyl acetate extraction, and vacuum distillation. This process provides a green synthesis pathway for IBAc production, demonstrating environmental friendliness and potential for industrial application.