文献类型：期刊文献

英文题名：Stable Cu 8+species- Catalyzed CO 2 hydrogenation to methanol in silanol nests on Cu/S-1 catalyst

作者：Cui, Zhengxing[1];Wang, Yeqing[1];Zhang, Peipei[2];Lu, Song[1];Chen, Yuxuan[1];Yu, Xiaotao[1];Guo, Min[1];Liu, Tiancun[1];Ying, Jiadi[1];Shen, Qi[1];Jin, Yinying[1];Yu, Zhixin[1,3]

机构：[1]Shaoxing Univ, Inst New Energy, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]CNOOC Inst Chem & Adv Mat, Beijing 102209, Peoples R China;[3]Univ Stavanger, Dept Energy & Petr Engn, N-4036 Stavanger, Norway

年份：2024

卷号：365

外文期刊名：APPLIED ENERGY

收录：SCI-EXPANDED(收录号：WOS:001221470400001)、、WOS

基金：This work was supported by Scientific Research Fund of Zhejiang Provincial Education Department (Y202248442) ; the National Natural Science Foundation of China (22208220) ; and the Zhejiang Provincial Natural Science Foundation of China (LQ23B030005) .

语种：英文

外文关键词：Silanol nests; Cu(8+)species; Cu-based catalyst; Methanol; CO2 hydrogenation

外文摘要：Fine -regulating the electronic state of metal species to enhance the catalytic activity has demonstrated to be an effective yet persistent challenge. The study introduces an innovative method for enhancing catalytic performance in hydrogenating CO 2 to methanol via modulating copper -support interactions through the adjustment of surface silanol groups. The developed Cu/S-1 catalyst exhibits outstanding results: 85% methanol selectivity and 8.0% CO 2 conversion under 240 degrees C and 3 MPa, while maintaining stability for over 200 h. This performance surpasses that of the Cu/SiO 2 catalyst. Analyses indicate that the higher presence of Cu 8+ species in Cu/S-1 is attributed to the silanol nests in S-1 zeolite, which can stabilize these species and prevent the further reduction. The study identifies Cu 8+ and Cu 0 as active species for CH 3 OH and CO production, respectively. A higher Cu 8+ / Cu 0 ratio eventuates better CO 2 conversion and CH 3 OH selectivity. Copper -support interaction is a key to the exceptional stability of the catalyst.