{"title":"Electron‐rich SnO2 promote CO2 activation for stable electrocatalytic CO2 reduction","authors":"","doi":"10.1016/j.jcis.2024.09.157","DOIUrl":null,"url":null,"abstract":"<div><p>Electrocatalytic CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) to formate offers a promising route for carbon neutralization, but its reactivity is largely compromised due to the competitive hydrogen evolution reaction (HER) accompanying the activation of CO<sub>2</sub> at high potentials. Herein, we modulated the charge density around Sn atoms by introducing La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub> into SnO<sub>2</sub>, with the rich grain boundaries and fast electron transport of the heterostructure promoting CO<sub>2</sub> reduction. Combined theoretical calculations and <em>in situ</em> electrochemical attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) characterization revealed enhanced activation of CO<sub>2</sub> and adsorption of *OCHO intermediates by the constructed electron-rich SnO<sub>2</sub>. During the CO<sub>2</sub>RR process over 5 % La<sub>2</sub>Sn<sub>2</sub>O<sub>7</sub>/SnO<sub>2</sub> catalyst, the Sn oxidation state can be effectively stabilized by the oxygen vacancies and amorphous phases appearing around SnO<sub>2</sub>, with a FE of 70.7 % for HCOOH at −0.9 V <em>vs.</em> RHE and stable electrolysis of 39 h. This work provides an ideal approach for the development of highly stable Sn-based electrocatalysts.</p></div>","PeriodicalId":351,"journal":{"name":"Journal of Colloid and Interface Science","volume":null,"pages":null},"PeriodicalIF":9.4000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Colloid and Interface Science","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0021979724022215","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Electrocatalytic CO2 reduction reaction (CO2RR) to formate offers a promising route for carbon neutralization, but its reactivity is largely compromised due to the competitive hydrogen evolution reaction (HER) accompanying the activation of CO2 at high potentials. Herein, we modulated the charge density around Sn atoms by introducing La2Sn2O7 into SnO2, with the rich grain boundaries and fast electron transport of the heterostructure promoting CO2 reduction. Combined theoretical calculations and in situ electrochemical attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) characterization revealed enhanced activation of CO2 and adsorption of *OCHO intermediates by the constructed electron-rich SnO2. During the CO2RR process over 5 % La2Sn2O7/SnO2 catalyst, the Sn oxidation state can be effectively stabilized by the oxygen vacancies and amorphous phases appearing around SnO2, with a FE of 70.7 % for HCOOH at −0.9 V vs. RHE and stable electrolysis of 39 h. This work provides an ideal approach for the development of highly stable Sn-based electrocatalysts.
期刊介绍:
The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality.
Emphasis:
The journal emphasizes fundamental scientific innovation within the following categories:
A.Colloidal Materials and Nanomaterials
B.Soft Colloidal and Self-Assembly Systems
C.Adsorption, Catalysis, and Electrochemistry
D.Interfacial Processes, Capillarity, and Wetting
E.Biomaterials and Nanomedicine
F.Energy Conversion and Storage, and Environmental Technologies