燃料化学学报（中英文）2023，Vol.51Issue(1)：101-110,10.DOI:10.1016/S1872-5813(22)60063-X
金属掺杂对LaFe基钙钛矿催化CO2加氢制低碳烯烃性能影响
Effects of metal doping on the catalytic performance of LaFe-based perovskites for CO2 hydrogenation to light olefins
摘要
Abstract
ThecatalyticbehaviorofK/LaFeBO3(B=Cu,Zr,Al,Mn,Ni,andZn)perovskitecatalystspreparedbysol-geland impregnation methods was investigated for CO2 hydrogenation to light olefins. The structure of various catalysts was characterized in detail by SEM, XRD, N2 adsorption-desorption, H2-TPR, CO2-TPD, TG, and XPS analysis. With the addition of Cu and Zn, the particles size decreased with high dispersion of Fe, while the exposed basic sites increased with lower hydrogen desorption temperature. The oxygen mobility in perovskites exhibited a considerable impact on catalytic activity and olefins selectivity, which considerably increased when Fe was substituted by Cu and Zn at the B site. Olefins were formed preferentially from oxygen species of the surface lattice with low binding energies (BEs). In addition, a faster diffusion rate of oxygen would lead to an enrichment of lattice oxygen species on the surface and increase the production of olefins.关键词
二氧化碳加氢/钙钛矿/LaFeBO3催化剂/氧迁移Key words
CO2hydrogenation/perovskite/LaFeBO3catalyst/oxygenmobility分类
化学化工引用本文复制引用
马利海,高新华,张建利,马晶晶,胡修德,郭庆杰..金属掺杂对LaFe基钙钛矿催化CO2加氢制低碳烯烃性能影响[J].燃料化学学报（中英文）,2023,51(1):101-110,10.基金项目
The project was supported by the Key Project of Natural Science Foundation of Ningxia(2022AAC02002)and the National Natural Science Foundation of China(U20A20124). （2022AAC02002）
