文献类型：期刊文献

英文题名：Electrochemical Reduction of CO2 to CO on Hydrophobic Zn Foam Rod in a Microchannel Electrochemical Reactor

作者：Zhang, Chunxiao[1];Yan, Shenglin[1];Lin, Jing[1];Hu, Qing[1];Zhong, Juhua[2];Zhang, Bo[3];Cheng, Zhenmin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Sci, Dept Phys, Shanghai 200237, Peoples R China;[3]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China

年份：2021

卷号：9

期号：9

外文期刊名：PROCESSES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000700151800001)】；

语种：英文

外文关键词：hydrophobic zinc foam; CO2 mass transfer; faradaic efficiency; electrochemical CO2 reduction

摘要：Due to CO2 mass transfer limitation as well as the competition of hydrogen evolution reaction in electroreduction of CO2 in the aqueous electrolyte, Zn-based electrodes normally exhibit unsatisfying selectivity for CO production, especially at high potentials. In this work, we introduced a zinc myristate (Zn [CH3(CH2)(12)COO](2)) hydrophobic layer on the surface of zinc foam electrode by an electrodeposition method. The obtained hydrophobic zinc foam electrode showed a high Faradaic efficiency (FE) of 91.8% for CO at -1.9 V (vs. saturated calomel electrode, SCE), which was a remarkable improvement over zinc foam (FECO = 81.87%) at the same potentials. The high roughness of the hydrophobic layer has greatly increased the active surface area and CO2 mass transfer performance by providing abundant gas-liquid-solid contacting area. This work shows adding a hydrophobic layer on the surface of the catalyst is an effective way to improve the electrochemical CO2 reduction performance.