CuO/LaCeOx catalysts with enhanced metal-support interactions for CO2 methanolization

被引：5

作者：

Nie, Mengdong ^{[1
]}

Cui, Aixin ^{[1
]}

Wu, Man ^{[1
]}

Guo, Tuo ^{[1
,2
]}

Guo, Qingjie ^{[1
,2
]}

机构：

[1] Qingdao Univ Sci & Technol, Coll Chem Engn, Qingdao 266042, Peoples R China

[2] Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High efficiency Coal Utilizat & Gree, Yinchuan 750021, Peoples R China

来源：

JOURNAL OF CO2 UTILIZATION | 2023年 / 75卷

基金：

中国国家自然科学基金;

关键词：

CO2; hydrogenation; LaCeOx solid solution; Oxygen vacancy; Formate reaction pathway; CRUCIAL ROLE; HYDROGENATION; CU; ADSORPTION; SITES; CONVERSION; REDUCTION;

D O I：

10.1016/j.jcou.2023.102579

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The activity of CO2 methanolization depends on the realization of metal-oxide interactions with different strengths. The CuO/La0.25CeOx catalyst (La content: 25%) demonstrated superior catalytic activity under the reaction conditions of 260 degrees C, with a methanol space-time yield (STY) of 0.281 g(CH3OH)center dot g(cat)(-1)h(-1) and a methanol selectivity of 83.3%. This study elucidates the correlation of the metal-support interactions in CuO/LaCeOx catalysts and the promotion of catalytic activity, which mainly shows that the introduction of La leads to enhanced conversion of Ce4+ into Ce3+ in the catalyst, facilitates oxygen vacancy generation, and activates the formate reaction pathway of CO2 hydrogenation. Thus, this study has considerable significance for the progress of efficient and new catalysts for CO2 methanolization.

引用

页数：12

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