文献类型：期刊文献

英文题名：Unveiling the role of silicon in boosting electrochemical carbon dioxide reduction via carbon nanotubes@bismuth silicates

作者：Liu, Fuming Luo, Mei Wang, Keliang Li, Ziwei Liu, Fei Li, Min

第一作者：Liu, Fuming

通信作者：Li, ZW[1];Liu, F[1];Li, M[1]

机构：[1]Guizhou Univ, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China;[2]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[3]Liupanshui Normal Univ, Sch Chem & Mat Engn, Liupanshui 553004, Peoples R China

第一机构：Guizhou Univ, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Guizhou Prov Key Lab Green Chem & Clean Energy Tec, Sch Chem & Chem Engn, Guiyang 550025, Peoples R China.

年份：2025

卷号：678

起止页码：311-321

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001303792400001)】；

基金：This work was supported by National Natural Science Foundation of China (22168013, 22279024) , Key Laboratory of Carbon-based Energy Molecular Chemical Utilization Technology in Guizhou Province (2023008) , Natural Science Foundation of Guizhou (ZK [2022] 074) , National Foreign Expert Project (G2023038002L) .

语种：英文

外文关键词：CO2 adsorption; Electrochemical CO2 reduction; CNT@Bi silicates catalyst; Abundant oxygen

摘要：Electrochemical CO2 2 reduction reaction (CO2RR) 2 RR) is one of the most attractive measures to achieve the carbon neutral goal by converting CO2 2 into high-value chemicals such as formate. Si in Bi silicates is promising to enhance CO2 2 adsorption and activation due to its strong oxygenophilicity. Whereas, its role in boosting CO2RR 2 RR via the cheap Bi-based catalysts is still not clear. Herein, we design CNT@Bi silicates catalyst, demonstrating the highest FE HCOOH of 96.3 % at-0.9 V vs . reversible hydrogen electrode with good stability. Through X-ray photoelectron spectroscopy (XPS), in-situ Attenuated Total Reflectance-Fourier Transform Infrared (In In-situ ATRSEIRAS) experiments, and Density Functional Theory (DFT) calculations, the role of Si in Bi silicates was unveiled: tuning the electronic structure of Bi, weakening the Bi-O bond, and strengthening electron transfer from Bi to CO2, 2 , thereby promoting the generation of CO2*- 2 *- and *OCHO intermediates. Additionally, carbon nano- tubes (CNTs) promote not only the conductivity but also the generation of abundant oxygen vacancies in CNT@Bi silicates evidenced by the electron transfer from CNT to Bi silicates from XPS results. Further, the CNT@Bi silicates endows it with the highest electrochemical activation area. These findings suggest the effectiveness of Si in Bi silicates and structure tuning to design highly selective CO2RR 2 RR catalyst for HCOOH production.