{"title":"Tunable Production of Syngas via Pulsed-Potential Electrolysis of CO2 over Single-Crystal Cu(100)","authors":"Yue Gong, Tao He","doi":"10.1021/acsaem.4c01338","DOIUrl":null,"url":null,"abstract":"Obtaining syngas from the electrochemical reduction of CO<sub>2</sub> has been considered an economical and promising solution for energy and environmental sustainability. Cu-based catalysts have been attracting great attention due to their low cost and easy accessibility, while tuning the selectivity toward specific products is a critical issue. In this work, a pulsed-potential strategy coupled with a low-reduction overpotential is applied to (100) single-crystal Cu foils. Only H<sub>2</sub> and CO are observed under the bias of a low-reduction potential. By tuning the pulse width and anodic potential, controllable syngas with a broad range from ∼97:5 to ∼5:14 can be obtained with the same low cathodic potential. Based on various characterization results before and after pulse electrolysis, the enhanced CO production is attributed to the in situ-generated Cu<sup>+</sup> species and roughened surface, as well as the modulation of local pH and CO<sub>2</sub> concentration near the electrode.","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"11 1","pages":""},"PeriodicalIF":5.4000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1021/acsaem.4c01338","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Obtaining syngas from the electrochemical reduction of CO2 has been considered an economical and promising solution for energy and environmental sustainability. Cu-based catalysts have been attracting great attention due to their low cost and easy accessibility, while tuning the selectivity toward specific products is a critical issue. In this work, a pulsed-potential strategy coupled with a low-reduction overpotential is applied to (100) single-crystal Cu foils. Only H2 and CO are observed under the bias of a low-reduction potential. By tuning the pulse width and anodic potential, controllable syngas with a broad range from ∼97:5 to ∼5:14 can be obtained with the same low cathodic potential. Based on various characterization results before and after pulse electrolysis, the enhanced CO production is attributed to the in situ-generated Cu+ species and roughened surface, as well as the modulation of local pH and CO2 concentration near the electrode.
期刊介绍:
ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.