Hydroxyls on CeO2 Support Promoting CuO/CeO2 Catalyst for Efficient CO Oxidation and NO Reduction by CO

被引：16

作者：

Almousawi, Murtadha ^{[1
]}

Xie, Shaohua ^{[1
]}

Kim, Daekun ^{[1
]}

Ye, Kailong ^{[1
]}

Zhang, Xing ^{[1
]}

Loukusa, Jeremia ^{[1
]}

Ma, Lu ^{[2
]}

Ehrlich, Steven ^{[2
]}

Tetard, Laurene ^{[3
]}

Liu, Fudong ^{[1
]}

机构：

[1] Univ Cent Florida, Nanosci Technol Ctr NSTC, Dept Civil Environm & Construct Engn, Catalysis Cluster Renewable Energy & Chem Transfor, Orlando, FL 32816 USA

[2] Brookhaven Natl Lab, Natl Synchrotron Light Source NSLS II 2, Upton, NY 11973 USA

[3] Univ Cent Florida, Nanosci Technol Ctr NSTC, Dept Phys, Orlando, FL 32816 USA

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2023年 / 58卷 / 01期

基金：

美国国家科学基金会;

关键词：

copper-ceria catalyst; support effect; hydroxyl-rich Ce(OH) (x); Cu dispersion; oxygen vacancy; CUO-CEO2; CATALYSTS; HOLLOW NANOSPHERES; NANOWIRE ARRAYS; MIXED OXIDES; CU; PERFORMANCE; NANOPARTICLES; ADSORPTION; GRAPHENE; INSIGHTS;

D O I：

10.1021/acs.est.3c06803

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Transition metal catalysts, such as copper oxide, are more attractive alternatives to noble metal catalysts for emission control due to their higher abundance, lower cost, and excellent catalytic activity. In this study, we report the preparation and application of a novel CuO/CeO2 catalyst using a hydroxyl-rich Ce(OH)(x) support for CO oxidation and NO reduction by CO. Compared to the catalyst prepared from a regular CeO2 support, the new CuO/CeO2 catalyst prepared from the OH-rich Ce(OH)(x) (CuO/CeO2-OH) showed significantly higher catalytic activity under different testing conditions. The effect of OH species in the CeO2 support on the catalytic performance and physicochemical properties of the CuO/CeO2 catalyst was characterized in detail. It is demonstrated that the abundant OH species enhanced the CuOx dispersion on CeO2, increased the CuOx-CeO2 interfaces and surface defects, promoted the oxygen activation and mobility, and boosted the NO adsorption and dissociation on CuO/CeO2-OH, thus contributing to its superior catalytic activity for both CO oxidation and NO reduction by CO. These results suggest that the OH-rich Ce(OH)(x) is a superior support for the preparation of highly efficient metal catalysts for different applications.

引用

页码：883 / 894

页数：12

共 72 条

[1] Selective CO oxidation over CuO-CeO2 catalysts prepared via the urea-nitrate combustion method [J].