Wenkai Yan, Yajun Zhang, Guojun Dong and Yingpu Bi
{"title":"Neighboring effects of single-atom cobalt enable high-performance CO2 photoreduction†","authors":"Wenkai Yan, Yajun Zhang, Guojun Dong and Yingpu Bi","doi":"10.1039/D4EY00274A","DOIUrl":null,"url":null,"abstract":"<p >Herein, we demonstrate the unique neighboring effect of single-cobalt active sites anchored on BiOCl nanosheets with high CO<small><sub>2</sub></small> photoreduction performances by combining <em>in situ</em> X-ray photoelectron with <em>in situ</em> infrared spectroscopy. More specifically, single-atom Co sites demonstrate an exceptional electron-enriched feature from adjacent Bi atoms, which facilitates the formation of *CO<small><sub>2</sub></small>–Co and *H<small><sub>2</sub></small>O–Bi species, respectively. Under light irradiation, the photoinduced electron transfer from adjacent Bi atoms to single Co active sites is favorable for the formation *COOH and *CO intermediates, accompanied by the oxidation of H<small><sub>2</sub></small>O molecules into *OH and *OOH species on Bi sites. As a result, these dynamic electronic interactions between single-atom Co and adjacent Bi sites are responsible for a record CO evolution activity of 172.6 μmol g<small><sup>−1</sup></small> h<small><sup>−1</sup></small> under sunlight illumination, which exceeds that of pristine BiOCl by nearly one order of magnitude. These findings provide a fundamental understanding of the intrinsic neighboring effect between single-atom sites and adjacent atoms, which should be crucial and essential for the development of high-performance single-atom catalysts.</p>","PeriodicalId":72877,"journal":{"name":"EES catalysis","volume":" 2","pages":" 268-273"},"PeriodicalIF":0.0000,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ey/d4ey00274a?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"EES catalysis","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ey/d4ey00274a","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Herein, we demonstrate the unique neighboring effect of single-cobalt active sites anchored on BiOCl nanosheets with high CO2 photoreduction performances by combining in situ X-ray photoelectron with in situ infrared spectroscopy. More specifically, single-atom Co sites demonstrate an exceptional electron-enriched feature from adjacent Bi atoms, which facilitates the formation of *CO2–Co and *H2O–Bi species, respectively. Under light irradiation, the photoinduced electron transfer from adjacent Bi atoms to single Co active sites is favorable for the formation *COOH and *CO intermediates, accompanied by the oxidation of H2O molecules into *OH and *OOH species on Bi sites. As a result, these dynamic electronic interactions between single-atom Co and adjacent Bi sites are responsible for a record CO evolution activity of 172.6 μmol g−1 h−1 under sunlight illumination, which exceeds that of pristine BiOCl by nearly one order of magnitude. These findings provide a fundamental understanding of the intrinsic neighboring effect between single-atom sites and adjacent atoms, which should be crucial and essential for the development of high-performance single-atom catalysts.