{"title":"Boosting ethylene yield via a synergistic 2D/0D nanostructured VCu layered double hydroxide/TiO2 catalyst in electrochemical CO2 reduction†","authors":"Sneha S. Lavate and Rohit Srivastava","doi":"10.1039/D4YA00417E","DOIUrl":null,"url":null,"abstract":"<p >The electrochemical conversion of CO<small><sub>2</sub></small> into C<small><sub>1</sub></small> and C<small><sub>2</sub></small> hydrocarbons, such as methane and ethylene, is a promising pathway toward achieving net zero carbon emissions; however, owing to the high activation barrier of CO<small><sub>2</sub></small>, this reaction remains a big challenge. In this work, an effective strategy has been developed through the synthesis of a low-cost vanadium- and copper-based layered double hydroxide (LDH) decorated with TiO<small><sub>2</sub></small> nanoparticles (VCu LDH/TiO<small><sub>2</sub></small>) as a highly efficient electrocatalyst for the electrochemical reduction of CO<small><sub>2</sub></small> to ethylene. Structural and morphological studies of the developed electrocatalyst were carried out using various analytical techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (FESEM), X-ray photoelectron microscopy (XPS) and transmission electron microscopy (TEM), which confirmed the successful formation of VCu LDH/TiO<small><sub>2</sub></small>. The electrochemical CO<small><sub>2</sub></small> reduction reaction (CO<small><sub>2</sub></small>RR) was performed in 0.1 M KHCO<small><sub>3</sub></small> using an H-type cell and afforded CO, H<small><sub>2</sub></small>, CH<small><sub>4</sub></small>, and C<small><sub>2</sub></small>H<small><sub>4</sub></small> as value-added end products. The highest faradaic efficiency of 84% was obtained for C<small><sub>2</sub></small>H<small><sub>4</sub></small> at −0.4 V <em>vs.</em> RHE. The above results suggest that the VCu LDH/TiO<small><sub>2</sub></small> NP electrocatalyst may be an excellent candidate for CO<small><sub>2</sub></small> reduction and can also be utilized in a wide range of energy conversion and storage applications.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 11","pages":" 2801-2811"},"PeriodicalIF":3.2000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00417e?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy advances","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00417e","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The electrochemical conversion of CO2 into C1 and C2 hydrocarbons, such as methane and ethylene, is a promising pathway toward achieving net zero carbon emissions; however, owing to the high activation barrier of CO2, this reaction remains a big challenge. In this work, an effective strategy has been developed through the synthesis of a low-cost vanadium- and copper-based layered double hydroxide (LDH) decorated with TiO2 nanoparticles (VCu LDH/TiO2) as a highly efficient electrocatalyst for the electrochemical reduction of CO2 to ethylene. Structural and morphological studies of the developed electrocatalyst were carried out using various analytical techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (FESEM), X-ray photoelectron microscopy (XPS) and transmission electron microscopy (TEM), which confirmed the successful formation of VCu LDH/TiO2. The electrochemical CO2 reduction reaction (CO2RR) was performed in 0.1 M KHCO3 using an H-type cell and afforded CO, H2, CH4, and C2H4 as value-added end products. The highest faradaic efficiency of 84% was obtained for C2H4 at −0.4 V vs. RHE. The above results suggest that the VCu LDH/TiO2 NP electrocatalyst may be an excellent candidate for CO2 reduction and can also be utilized in a wide range of energy conversion and storage applications.