Facile Synthesis of Efficient and Robust Cu-Zn-Al Catalysts by the Sol-Gel Method for the Water-Gas Shift Reaction

被引：5

作者：

Ye, Jingwei ^{[1
,2
]}

Song, Song ^{[1
,2
,3
]}

Cui, Zhonghui ^{[1
,2
]}

Wu, Peipei ^{[1
,2
]}

Zhang, Yingtian ^{[1
,2
]}

Luo, Wei ^{[1
,2
]}

Ding, Tong ^{[1
,2
]}

Tian, Ye ^{[1
,2
]}

Li, Xingang ^{[1
,2
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Chem Engn & Technol, State Key Lab Chem Engn,Haihe Lab Sustainable Che, Tianjin 300350, Peoples R China

[2] Tianjin Univ, Zhejiang Inst, Shaoxing 312300, Zhejiang, Peoples R China

[3] South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2023年 / 62卷 / 38期

基金：

中国国家自然科学基金;

关键词：

HYDROGEN-PRODUCTION; CO2; HYDROGENATION; ACTIVE-SITES; WGS REACTION; PERFORMANCE; METHANOL; REDUCTION; CU/ZNO; XPS; NO;

D O I：

10.1021/acs.iecr.3c01333

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The water-gas shift reaction is widely employed in hydrogen production. Herein, we report a facile sol-gel method for preparing Cu-Zn-Al catalysts with significantly suppressed Cu and Zn contents compared with commercial Cu/ZnO/Al2O3. We discover that Zn species are not only to augment the proportion of Cu+ species to increase the concentration of adsorbed CO on catalysts, thereby promoting the formation of intermediate species; but also to decrease the size of Cu-0 nanoparticles, which accelerates the decomposition of reaction intermediates and the desorption of products. Both advantages significantly improve the performance and stability of the catalysts, especially for CuZnAl-10. It contains 12 wt % Cu and 1.2 wt % Zn with the optimal Cu+/Cu-0 ratio of 1.2 and exhibits similar to 5 times higher reaction rate compared to Cu/ZnO/Al2O3 at 200 degrees C. In situ characterization results further demonstrate that the as-prepared Cu-Zn-Al catalysts follow an association mechanism.

引用

页码：15386 / 15394

页数：9

共 60 条

[1] Unravelling the active sites and structure-activity relationship on Cu-ZnO-Al2O3 based catalysts for water-gas shift reaction [J].