文献类型：期刊文献

英文题名：In situ growth of hydrophobic 3D porous Zn@Ag electrode in achieving excellent performance for eCO2RR

作者：Yan, Shenglin[1,2];Zhang, Xinyu[3];Mahyoub, Samah A.[4];Zhang, Bo[5];Wan, Xiangbei[1];Cui, Yanran[1,2];Xie, Pengfei[2,6];Wang, Qiong[1,2];Cheng, Zhenmin[1,7];Li, Zhenglong[1,2]

机构：[1]Zhejiang Univ, Coll Biosyst Engn & Food Sci, Natl Key Lab Biobased Transportat Fuel Technol, Hangzhou 310058, Peoples R China;[2]Inst Zhejiang Univ Quzhou, Div Biobased Chem, Quzhou 324000, Peoples R China;[3]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon containing W, Sch Resources & Environm Engn, Dept Energy & Chem Engn,Minist Educ, Shanghai 200237, Peoples R China;[4]King Fahd Univ Petr & Minerals KFUPM, Interdisciplinary Res Ctr Hydrogen Technol & Carbo, Dhahran 31261, Saudi Arabia;[5]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China;[6]Zhejiang Univ, Coll Chem & Biol Engn, Key Lab Biomass Chem Engn, Minist Educ, Hangzhou 310058, Peoples R China;[7]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：499

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20243917117682);WOS:【SCI-EXPANDED(收录号:WOS:001327484000001)】；

基金：This work is supported by the National Key R & D Program of China (No. 2019YFC1906705) , Central University First-Class Discipline Guidance Special Project (SLA00231209) , China Postdoctoral Science Foundation Funded Project (2022M721137) , and the Science and Technology Commission of Shanghai Municipality (23YF1408500) .

语种：英文

外文关键词：CO 2 electroreduction; Heterogeneous electrode; Surface wettability; Interior mass transfer; Pore blocking

摘要：Hydrophobic microenvironment is favorable to CO2 electroreduction, which can enhance CO2 transport by overcoming the low solubility limitation of CO2 in aqueous electrolytes. Up to now, hydrophobic electrode is normally prepared by coating an external hydrophobic layer or by hydrophobic in situ synthesis. Nevertheless, both methods suffer from the low current density of the reaction. To resolve this problem, a three-dimensional (3D) volumetrically electroplated PTFE (polytetrafluoroethylene) porous electrode was produced via PTFE-assisted hydrogen bubble dynamic template method, which has a heterogeneous structure with a hydrophilic surface and hydrophobic interior. The hydrophobic 3D porous Zn@Ag electrode displayed a high activity up to -45 mA cm(-2) with over 92.1 % FECO in a microchannel electrolyzer with KHCO3 solution, which is 3 times higher than a bare ZnAg foam electrode without PTFE (only -15 mA cm(-2) with over 92.0 % FECO). Furthermore, it achieved a FECO over 91.0 % at a current density up to -250 mA cm(-2) in a flow cell with 1 M KOH electrolyte. The excellent performance was attributed to the accessibility of the active sites to CO2 in the interior of the electrode, because the pore blocking problem by liquid electrolyte was solved in the case of the hydrophobic interior.