CuO/CeO2 catalysts synthesized from Ce-UiO-66 metal-organic framework for preferential CO oxidation

被引：103
作者：
Zhu, Chunlan [1 ]
Ding, Tong [1 ]
Gao, Wanxian [1 ]
Ma, Kui [1 ]
Tian, Ye [1 ]
Li, Xingang [1 ]
机构：
[1] Tianjin Univ, Sch Chem Engn & Technol, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin Key Lab Appl Catalysis Sci & Engn, Tianjin 300072, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 27期
关键词：
CO preferential oxidation; CeO2; CuO; MOF; INVERSE CEO2/CUO CATALYSTS; CARBON-MONOXIDE; LOW-TEMPERATURE; SELECTIVE OXIDATION; CUO-CEO2; CATALYSTS; ACTIVE-SITES; COPPER; PERFORMANCE; HYDROGEN; CERIUM;
D O I：
10.1016/j.ijhydene.2017.02.088
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：
We synthesized a CuO/CeO2 catalyst using a copper ions encapsulated ceria metal-organic framework (MOF) Ce-UiO-66 as the precursor. The CuO/CeO2 catalysts derived by calcining the MOF precursor (the x-CuCe catalysts) showed the better activity and selectivity for the preferential CO oxidation in the H-2-rich stream than the CuO/CeO2 catalyst prepared by wetness impregnation (CuCe-im). A temperature window to match the CO conversion and O-2 to CO2 selectivity higher than 99.5% at the same time appeared using the x-CuCe catalysts as the catalyst. Raman and XPS results indicated that more oxygen vacancies were formed in the bulk of ceria in the x-CuCe catalysts than that in the CuCe-im catalyst, which could promote the mobility of oxygen. Our results indicated that the surface lattice oxygen and the oxygen vacancies in the bulk of ceria could enhance the catalytic performance of the CuO/CeO2 catalysts. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：17457 / 17465
页数：9
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