文献类型：期刊文献

英文题名：Pyridine Grafted on SnO2-Loaded Carbon Nanotubes Acting as Cocatalyst for Highly Efficient Electroreduction of CO2

作者：Zhang, Yuning[1];Xu, Hai[1];Niu, Dongfang[1];Zhang, Xinsheng[1];Zhang, Yayun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：14

期号：13

起止页码：2769

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20211810281940);WOS:【SCI-EXPANDED(收录号:WOS:000645069700001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 21972042, 22008073) and Shanghai Sailing Program (No. 20YF1410600). We also thank the Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：CO2 electroreduction; electrocatalysis; grafted pyridine; SnO2 nanoparticles; synergistic effect

摘要：Sn-based electrocatalysts have shown great potential in the future industrial application of CO2 electroreduction (CO2ER) to C-1 products due to their non-toxicity and low price. However, it is a great challenge to fabricate a Sn-based electrocatalytic system with high performance and stability. Herein, grafted pyridine was innovatively coupled with SnO2 to construct an organic-inorganic composite (SnO2/Py-CNTO) for highly efficient CO2ER. The detailed studies showed that pyridine and protonated pyridine coexist on the surface of SnO2/Py-CNTO, and both play distinctive roles in promoting the selectivity of CO2ER. Benefiting from the merits, SnO2/Py-CNTO delivered an excellent faradaic efficiency (FE) of 96 % for CO2ER at -1.29 V-RHE where the HCOOH production with 85 % FE dominated, and good stability for 32 h electrolysis. The theoretical calculations showed that protonated pyridine not only facilitates the CO2 adsorption and HCOOH desorption, but also significantly reduces the limiting potential for the conversion of CO2 to HCOOH.