文献类型：期刊文献

英文题名：Stabilizing Cu+ Species in Cu2O/CuO Catalyst via Carbon Intermediate Confinement for Selective CO2RR

作者：Shi, Haojun[1];Luo, Lingli[1];Li, Congcong[1];Li, Yu[1];Zhang, Tingting[1];Liu, Zhongliang[1];Cui, Jialin[1];Gu, Li[1];Zhang, Ling[1];Hu, Yanjie[1];Li, Huihui[1];Li, Chunzhong[1]

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

年份：2024

卷号：34

期号：11

外文期刊名：ADVANCED FUNCTIONAL MATERIALS

收录：;EI(收录号：20235115228910);WOS:【SCI-EXPANDED(收录号:WOS:001126987400001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grants 21838003, 21771170, 22008069), Shanghai Municipal Science and Technology Major Project, Shanghai Rising-Star Program (20QA1402700), Shanghai Sailing Program (20YF1410200).

语种：英文

外文关键词：CO2RR; confinement effect; flame spray pyrolysis; mixed-valence-state; surface Cu+ species

摘要：Copper oxide nanomaterials have been suggested to be efficient for highly selective multi-carbon (C2+) production in CO2 reduction reaction (CO2RR), due to the introduction of surface Cu+ species from oxide catalysts. However, the Cu+ species on the catalyst surface are prone to being reduced to Cu-0 under reductive conditions during CO2RR. Here, a network-structured catalyst is developed consisting of ultrafine Cu2O/CuO nanoparticles that harbor an abundance of pores. This catalyst is synthesized via flame spray pyrolysis (FSP) method and engineered to confine carbon intermediates, which subsequently cover the local catalyst surface and stabilize Cu+ species. As a result, a C2+ products Faradaic efficiency (FE) of approximately 80.0% at a partial current density of 320.0 mA cm(-2) is achieved, and a large C2+ to C-1 ratio of approximate to 9.7. In situ XRD and XPS spectra are employed to reveal the indeed presence of Cu+ species on the catalyst surface during the CO2RR process, which extensively improves the adsorption of *CO intermediates and thus the C & horbar;C coupling reaction to form C2+ products.