Direct Synthesis of Dimethyl Carbonate from Methanol and Carbon Dioxide Catalyzed by Cerium-Based High-Entropy Oxides

被引：6

作者：

Gu, Yunhan ^{[1
]}

Cheng, Qingyan ^{[1
,2
]}

Li, Xu ^{[1
]}

Zhang, Shuai ^{[1
]}

Wang, Zhuo ^{[1
]}

Wang, Yanji ^{[1
,2
]}

机构：

[1] Hebei Univ Technol, Sch Chem Engn & Technol, Tianjin 300401, Peoples R China

[2] Tianjin Key Lab Chem Proc Safety, Tianjin 300401, Peoples R China

来源：

CATALYSIS LETTERS | 2024年 / 154卷 / 02期

基金：

中国国家自然科学基金;

关键词：

High entropy oxide; Catalyst; Dimethyl carbonate; Anchoring method; Oxygen vacancy; CO2; NANOPARTICLES; XPS;

D O I：

10.1007/s10562-023-04303-4

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：

Fluorite high entropy oxides (HEOs) were synthesized by anchoring method and Ce-0.5(LaPrSmY)(0.5)O2-y used as catalysts for synthesis of dimethyl carbonate (DMC) from methanol (CH3OH) and carbon dioxide (CO2), the yield of DMC was up to 7.6 mmol/g at 140 celcius and 8.0 MPa. Under the same reaction conditions, the time to reach reaction equilibrium was reduced by half compared HEOs with CeO2. The structure of HEOs were characterized by X-ray diffraction (XRD), specific surface area and pore size analyzer (BET), high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS). The results showed that there are five metal elements of Ce, La, Pr, Sm and Y in the lattice of layered fluorite-type HEOs Ce-x(LaPrSmY)(1-x)O2-y. The synergistic effect among the elements led to the lattice distortion and the generation of a large number of oxygen vacancies, which improved the reaction rate. [GRAPHICS] .

引用

页码：513 / 523

页数：11

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