文献类型：期刊文献

英文题名：Influence of supports in CuFe-based catalysts for hydrogenation of CO2 to ethanol

作者：Liu, Yangqin[1];Ma, Yuling[1];Pu, Xin[1];Han, Xin[2];Ye, Lei[1];Kong, Lingtao[3];Li, Jiangbing[3];Zhang, Jian[4];Xu, Haitao[1];Qin, Xinglong[1];Liu, Jichang[1,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Shihezi Univ, Sch Chem & Chem Engn, State Key Lab Incubat Base Green Proc Chem Engn, Shihezi 832003, Xinjiang, Peoples R China;[4]Xinjiang Jiayuheng Energy Technol Co LTD, Huyanghe 834034, Xinjiang, Peoples R China

年份：2025

卷号：395

外文期刊名：FUEL

收录：;EI(收录号：20251318112740);WOS:【SCI-EXPANDED(收录号:WOS:001457469900001)】；

基金：This work was supported by the National Natural Science Foundation of China [22408107] , China Postdoctoral Science Foundation [GZC20230800] , Shanghai Sailing Program of China [24YF2708600] , and CNPC Innovation Fund [2024DQ02-0506] .

语种：英文

外文关键词：CO 2 hydrogenation; FeCu-based catalyst; Ethanol; Iron carbides; Metal-oxide interface; Reaction mechanism

摘要：Hydrogenation of CO2 into ethanol not only mitigates the greenhouse effect, but also significantly reduces the pressure on the extraction and use of fossil fuels. The structure of the catalyst, the formation, dispersion and stabilization of metal nanoparticles have an important influence on the catalytic performance. Many oxide supports can form metal-support interactions with active centers, which plays a crucial role in improving the activity and selectivity of CO2 hydrogenation to ethanol. Therefore, Na-promoted CuFe catalysts with different supports (ZnO, ZrO2, In2O3, Al2O3, CeO2) were prepared in this work. Among them, NaCuFeZn catalyst performed significantly best in CO2 hydrogenation to ethanol, with the space-time yield (STY) of higher alcohols (HAs) of the NaCuFeZn catalyst being 92.7 mg center dot gcat- 1 center dot h- 1. The proportion of ethanol in total alcohol was 74.0 %, and C2+OH/ROH reached 97.9 %. The addition of ZnO support could stabilize and disperse the active centers of Cu and Fe, reducing the particle size of CuO to 10.5 nm. Moreover, ZnO support promoted the formation of oxygen vacancy, which was conducive to activate CO2, thus the conversion of CO2 significantly increased from 8.1 % to 28.3 %. The increase of oxygen vacancy also enhanced the adsorption of CO, thus promoting the formation of FeCx, which facilitated the dissociation of CO and increased the C-C coupling in the process of the reaction. CO2 + H2-DRIFTS confirmed the reaction mechanism of ethanol synthesis that CHx was coupled with undissociated CO at the interface of Cu-Fe carbide, followed by hydrogenation to ethanol.