Qixing Zhang , Dan Ren , Jing Gao , Zhongke Wang , Juan Wang , Sanjiang Pan , Manjing Wang , Jingshan Luo , Ying Zhao , Michael Grätzel , Xiaodan Zhang
{"title":"具有OH -斥力的电极调节CO吸附，增强C-C耦合","authors":"Qixing Zhang , Dan Ren , Jing Gao , Zhongke Wang , Juan Wang , Sanjiang Pan , Manjing Wang , Jingshan Luo , Ying Zhao , Michael Grätzel , Xiaodan Zhang","doi":"10.1016/j.gce.2022.07.007","DOIUrl":null,"url":null,"abstract":"<div><p>Electrochemical CO<sub>2</sub> reduction driven by renewable electricity is one of the promising strategies to store sustainable energy as fuels. However, the selectivity of value-added multi-carbon products remains poor for further application of this process. Here, we regulate CO adsorption by forming a Nafion layer on the copper (Cu) electrode that is repulsive to OH<sup>−</sup>, contributing to enhanced selectivity of CO<sub>2</sub> reduction to C<sub>2+</sub> products with the suppression of C<sub>1</sub> products. The <em>operando</em> Raman spectroscopy indicates that the local OH<sup>−</sup> would adsorb on part of active sites and decrease the adsorption of CO. Therefore, the electrode with repulsive to OH<sup>−</sup> can adjust the concentration of OH<sup>−</sup>, leading to the increased adsorption of CO and enhanced C–C coupling. This work shows that electrode design could be an effective strategy for improving the selectivity of CO<sub>2</sub> reduction to multi-carbon products.</p></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":9.1000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Regulated CO adsorption by the electrode with OH− repulsive property for enhancing C–C coupling\",\"authors\":\"Qixing Zhang , Dan Ren , Jing Gao , Zhongke Wang , Juan Wang , Sanjiang Pan , Manjing Wang , Jingshan Luo , Ying Zhao , Michael Grätzel , Xiaodan Zhang\",\"doi\":\"10.1016/j.gce.2022.07.007\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Electrochemical CO<sub>2</sub> reduction driven by renewable electricity is one of the promising strategies to store sustainable energy as fuels. However, the selectivity of value-added multi-carbon products remains poor for further application of this process. Here, we regulate CO adsorption by forming a Nafion layer on the copper (Cu) electrode that is repulsive to OH<sup>−</sup>, contributing to enhanced selectivity of CO<sub>2</sub> reduction to C<sub>2+</sub> products with the suppression of C<sub>1</sub> products. The <em>operando</em> Raman spectroscopy indicates that the local OH<sup>−</sup> would adsorb on part of active sites and decrease the adsorption of CO. Therefore, the electrode with repulsive to OH<sup>−</sup> can adjust the concentration of OH<sup>−</sup>, leading to the increased adsorption of CO and enhanced C–C coupling. This work shows that electrode design could be an effective strategy for improving the selectivity of CO<sub>2</sub> reduction to multi-carbon products.</p></div>\",\"PeriodicalId\":66474,\"journal\":{\"name\":\"Green Chemical Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":9.1000,\"publicationDate\":\"2023-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Green Chemical Engineering\",\"FirstCategoryId\":\"1089\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666952822000620\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Green Chemical Engineering","FirstCategoryId":"1089","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666952822000620","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Regulated CO adsorption by the electrode with OH− repulsive property for enhancing C–C coupling
Electrochemical CO2 reduction driven by renewable electricity is one of the promising strategies to store sustainable energy as fuels. However, the selectivity of value-added multi-carbon products remains poor for further application of this process. Here, we regulate CO adsorption by forming a Nafion layer on the copper (Cu) electrode that is repulsive to OH−, contributing to enhanced selectivity of CO2 reduction to C2+ products with the suppression of C1 products. The operando Raman spectroscopy indicates that the local OH− would adsorb on part of active sites and decrease the adsorption of CO. Therefore, the electrode with repulsive to OH− can adjust the concentration of OH−, leading to the increased adsorption of CO and enhanced C–C coupling. This work shows that electrode design could be an effective strategy for improving the selectivity of CO2 reduction to multi-carbon products.
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