文献类型：期刊文献

英文题名：Proof-of-concept Study of a New Microflow Electrochemical Cell Design for Gas-Evolving Reactions

作者：Chen, Ming[1];Zhao, Fang[1];Fan, Wenting[1];Li, Jian[1];Guo, Xuhong[1]

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

年份：2022

卷号：61

期号：10

起止页码：3781

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20221111784784);WOS:【SCI-EXPANDED(收录号:WOS:000776527100026)】；

基金：We gratefully thank National Natural Science Foundation of China for financial support (21808059).

语种：英文

外文关键词：Electrochemical cells - Density of gases - Microchannels - Residence time distribution

摘要：This work presents a proof-of-concept demonstration of a new microflow electrochemical cell design for diminishing the side effects of the gas evolved at the electrodes including nonuniform current density distribution and shortened residence time of liquid phase. Gas-permeable material is used to fabricate the microchannel layer of the cell which is configured with an auxiliary vacuum microchannel alongside the reaction microchannel. Electrosynthetic results for two model reactions in a homemade microflow cell utilizing the new design indicated that gas in the reaction channel was partly transferred to the vacuum channel, bringing about the occurrence of many short liquid plugs in the reaction channel as well as reduced gas hold-up and nonuniformity in current density distribution. Thus, side reactions were significantly restrained, yielding superior reaction selectivity: 81% to 91% at 0.1 A for dimethoxylation of furan and 51% to 61% at 5 V for hydrodimerization of adiponitrile. These preliminary results prove the feasibility of the new electrolysis cell design which can be further optimized to perform efficient and selective gas-evolving electrosynthesis in microflow.