Insight into the correlation between Cu species and methanol selectivity from CO2 hydrogenation over Cu-based catalyst

被引：2

作者：

Shi, Peixiang ^{[1
,2
]}

Han, Jiahao ^{[1
]}

Yan, Zhiqiang ^{[1
]}

Luo, Pengcheng ^{[1
]}

Wang, Jingjing ^{[1
]}

Ban, Hongyan ^{[1
]}

Zhang, Xinghua ^{[2
]}

Li, Congming ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Coll Chem Engn & Technol, State Key Lab Clean & Efficient Coal Utilizat, Taiyuan 030024, Shanxi, Peoples R China

[2] Taiyuan Univ Technol Engn, Coll Safety & Emergency Management, Taiyuan 030024, Shanxi, Peoples R China

来源：

MOLECULAR CATALYSIS | 2024年 / 563卷

基金：

中国国家自然科学基金;

关键词：

CO2; hydrogenation; Methanol; Cu-based catalyst; Activation; METAL-SUPPORT INTERACTIONS; HETEROGENEOUS CATALYSTS; PREFERENTIAL OXIDATION; CU/ZNO/AL2O3; CATALYSTS; CH3OH SELECTIVITY; CARBON-DIOXIDE; COPPER; PRECURSORS; CU/SIO2; INTERFACE;

D O I：

10.1016/j.mcat.2024.114278

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The pre-activation of Cu-based catalysts is an important step to fully develop their catalytic potential. The production of active species (Cu+ and Cu0) which play the active site role generally occurs in the activation stage by reducing from Cu2+. Herein, the Cu+/Cu0 ratio of CuZnOAl2O3 (CZA) catalysts was adjusted using different activation atmospheres and the relationship between Cu+/Cu0 ratio of the catalyst and methanol selectivity from CO2 hydrogenation was investigated in detail. Combined with X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), in situ diffuse reflectance infrared Fourier transformation spectroscopy (DRIFTS) characterization, etc. and experimental results, it was observed that the selectivity of methanol was obviously relied on the Cu+/Cu0 ratio of CZA catalyst. This work provides theoretical guidance and feasible scheme to rationally design and optimize the required catalysts.

引用

页数：9

共 49 条

[1] Challenges in the Greener Production of Formates/Formic Acid, Methanol, and DME by Heterogeneously Catalyzed CO2 Hydrogenation Processes [J].