文献类型：期刊文献

英文题名：Regulation of electrical double layers promotes electrochemical reduction of carbon dioxide

作者：Yu, Tingting[1];Tao, Haolan[1];Li, Jingkun[2];Lian, Cheng[1,2];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：276

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20231713952972);WOS:【SCI-EXPANDED(收录号:WOS:000989437700001)】；

基金：This work was sponsored by the National Key R & D Program of China (No. 2019YFC1906702) , the National Natural Science Foundation of China (No. 22078088 and No. 22102114) , the National Natural Science Foundation of China for Innovative Research Groups (No. 51621002) , and the Shanghai Rising-Star Program (No. 21QA1401900) . H. T. gratefully acknowledges the financial support from China Scholarship Council. H. T. thanks Prof. Renevan Roij for enlightening discussions.

语种：英文

外文关键词：electrocatalytic CO2 reduction; Electrical double layer; modified Poisson -Nernst -Planck equations; Diffusion -migration -reaction process

摘要：The electrochemical CO2 reduction reaction is an effective approach to alleviate global energy shortage and environmental problems by converting CO2 to high value-added products. The rational design of nanostructured electrocatalysts requires an understanding of the interplay between mass transfer and reaction in a confined environment. Here, local pH and CO2 concentration are considered as the typical descriptors of reaction environment, which are modelled using the reaction-coupled modified Poisson-Nernst-Planck equations in an isolated nanopore. The effect of nanoconfinement, steric hindrance and electrical double layer on the CO2RR as well as the competitive hydrogen evolution reaction are investigated. An optimal local reaction environment with high Faradaic efficiency and selectivity is found when the pore radius is comparable to the Debye length. Our work provides microscopic insights into the interplay between diffusion, migration, and reaction under the nanoconfinement of nanopores.