DICP OpenIR
CuO/CeO2 catalysts: Redox features and catalytic behaviors
Tang, XL; Zhang, BC; Li, Y; Xu, YD; Xin, Q; Shen, WJ
关键词Cuo/ceo2 Redox Features Chemical States Metal-support Interaction Co Oxidation
刊名APPLIED CATALYSIS A-GENERAL
2005-07-15
DOI10.1016/j.apcata.2005.04.024
288期:1-2页:116-125
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
类目[WOS]Chemistry, Physical ; Environmental Sciences
研究领域[WOS]Chemistry ; Environmental Sciences & Ecology
关键词[WOS]CARBON-MONOXIDE OXIDATION ; OXIDE COMPOSITE CATALYSTS ; CO OXIDATION ; CU/CEO2 CATALYST ; COPPER CATALYST ; CERIA ; METAL ; CU ; REDUCTION ; SPECTROSCOPY
英文摘要The reduction and oxidation features of nanostructured CuO/CeO2 catalysts prepared by the deposition-precipitation method were extensively investigated by TPR, FIF-IR and in situ XPS techniques. Both the chemical states of copper and the reduction degree of ceria could be well controlled during the reduction with hydrogen by adjusting the temperature. Noticeably, the fully reduced Cu-0 could be further oxidized into Cu+ in hydrogen by increasing the reduction temperature through the interaction between Cu-0 and lattice oxygen of ceria immigrating to the surface. Structure-reactivity relationship was established between the structural features of CuO/CeO2 formed during the pre-reduction with hydrogen and its catalytic activities for CO oxidation. It was observed that reduction with hydrogen at 473-573 K, which leads to the full presence of metallic copper in the catalyst, gives rise to higher CO conversion. These phenomena were interpreted in terms of the reduction degrees of ceria, the changes of surface morphology and the chemical states of copper species. The interface oxygen activation as well as its transfer from the interface to the adsorbed reactant was found to play decisive roles in determining the reaction rate of CO oxidation. (c) 2005 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000230685200016
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/139857
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式
GB/T 7714
Tang, XL,Zhang, BC,Li, Y,et al. CuO/CeO2 catalysts: Redox features and catalytic behaviors[J]. APPLIED CATALYSIS A-GENERAL,2005,288(1-2):116-125.
APA Tang, XL,Zhang, BC,Li, Y,Xu, YD,Xin, Q,&Shen, WJ.(2005).CuO/CeO2 catalysts: Redox features and catalytic behaviors.APPLIED CATALYSIS A-GENERAL,288(1-2),116-125.
MLA Tang, XL,et al."CuO/CeO2 catalysts: Redox features and catalytic behaviors".APPLIED CATALYSIS A-GENERAL 288.1-2(2005):116-125.
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