Synergistic regulation of hydrophobicity and basicity for copper hydroxide-derived copper to promote the CO_(2)electroreduction reaction  

作　　者：Limin Zhou Chenghang Li Jing-Jing Lv Wei Wang Shaojun Zhu Jun Li Yifei Yuan Zheng-Jun Wang Qingcheng Zhang Huile Jin Shun Wang 

机构地区：[1]Wenzhou Key Lab of Advanced Energy Storage and Conversion,Zhejiang Province Key Lab of Leather Engineering,College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou,Zhejiang,China [2]Zhejiang Engineering Research Center for Electrochemical Energy Materials and Devices,Institute of New Materials and Industrial Technologies,Wenzhou University,Wenzhou,Zhejiang,China

出　　处：《Carbon Energy》2023年第6期72-81,共10页碳能源（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Numbers:52201227,21972126,51872209,52072273;Zhejiang Provincial Special Support Program for High-level Talents,Grant/Award Number:2019R52042;Key Project of Zhejiang Provincial Natural Science Foundation,Grant/Award Number:LZ20B030001。

摘　　要：A simple method was proposed to activate alkaline Cu(OH)_(2)with an acidic ionomer,Nafion,to regulate its surface microenvironment,including hydrophobicity and local basicity.In particular,the direct complete neutralization reaction between Cu(OH)_(2)and Nafion in aqueous solution induces the exposing of vast anions which can exclude the in-situ-formed hydroxides and raise the local basicity.Remarkably,the optimal Nafionactivated Cu(OH)_(2)-derived Cu can efficiently suppress the hydrogen evolution reaction(HER)and improve the selectivity for multi-carbon products in the CO_(2)electroreduction reaction(eCO_(2)RR).The H2 Faradaic efficiency(FE)decreased to 11%at a current density of 300 mA/cm2(−0.76 V vs.RHE)in a flow cell,while the bare one with H2 had an FE of 40%.The total eCO_(2)RR FE reaches as high as 83%,along with an evidently increased C2H4 FE of 44%as compared with the bare one(24%),and good stability(8000 s),surpassing that of most of the reported Cu(OH)_(2)-derived Cu.The experimental and theoretical results both show that the strong hydrophobicity and high local basicity jointly boosted the eCO_(2)RR as acquired by felicitously introducing ionomer on the Cu(OH)_(2)-derived Cu surface.

关 键 词：CO_(2)electroreduction reaction Cu(OH)_(2)@Nafion flow cell IONOMERS multi-carbon products 

分 类 号：O64[理学—物理化学]