Active sites over CuO/CeO2 and inverse CeO2/CuO catalysts for preferential CO oxidation

被引：92
|
作者：
Zeng, Shanghong [1 ,2 ]
Wang, Yan [1 ]
Ding, Suping [1 ]
Sattler, Jesper J. H. B. [2 ]
Borodina, Elena [2 ]
Zhang, Lu [1 ]
Weckhuysen, Bert M. [2 ]
Su, Haiquan [1 ]
机构：
[1] Inner Mongolia Univ, Sch Chem & Chem Engn, Inner Mongolia Key Lab Chem & Phys Rare Earth Mat, Hohhot 010021, Peoples R China
[2] Univ Utrecht, Debye Inst Nanomat Sci, Inorgan Chem & Catalysis Grp, NL-3584 CA Utrecht, Netherlands
来源：
JOURNAL OF POWER SOURCES | 2014年 / 256卷
基金：
中国国家自然科学基金;
关键词：
Copper-ceria catalysts; Hydrogen; Active site; Preferential CO oxidation; AREA CUO-CEO2 CATALYSTS; OXIDE COMPOSITE CATALYSTS; CARBON-MONOXIDE OXIDATION; SURFACE-AREA; SELECTIVE OXIDATION; IN-SITU; CUO; CERIA; GAS; TEMPERATURE;
D O I：
10.1016/j.jpowsour.2014.01.098
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：
A series of CuO/CeO2 and inverse CeO2/CuO catalysts are prepared by the surfactant-templated method and characterized via XRD, HRTEM, H-2-TPR, SEM, XPS, in situ XRD, in situ UV-Vis and N-2 adsorption-desorption techniques. It is found that there are two kinds of surface sites in the CuO-CeO2 system, including CuO surface sites for CO chemisorption and CeO2 surface sites with oxygen vacancies for oxygen sorption. The active sites for CO oxidation are located on the contact interface of two-kind surface Sites and the lattice oxygen can make a significant contribution to the CO-PROX reaction. The resistance to H2O and CO2 is related to BET surface area, the crystallite sizes of CuO and the reduction behavior of catalysts. The Ce4Cu4 and Ce4Cu1 catalysts exhibit the best resistance against H2O and CO2. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：301 / 311
页数：11
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