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题名: Dynamic structural changes of perovskite-supported metal catalysts during cyclic redox treatments and effect on catalytic CO oxidation
作者: Gao Kang1;  Wei Mingming2;  Qu Zhenping1;  Fu Qiang2;  Bao Xinhe2
关键词: Perovskite oxide ;  Silver ;  Platinum ;  Redox treatment ;  Structural modification ;  Carbon monoxide oxidation
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2013-05-01
DOI: 10.1016/S1872-2067(12)60581-6
卷: 34, 期:5, 页:889-897
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: CaTiO3-and BaTiO3-supported Ag and Pt catalysts were subjected to cyclic oxidation and reduction treatments and their surface structures were investigated using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The CO oxidation reactions over the Ag and Pt catalysts showed that the oxidized Ag/oxide catalysts performed better in CO oxidation than the reduced ones did, whereas the reduced Pt/oxide catalysts had higher CO oxidation activity than that after oxidation treatment. The XRD and XPS measurements revealed that the oxidation treatment helped to improve the dispersion of Ag nanoparticles, but their metallic state was retained, which enhanced CO oxidation. In contrast, the surfaces of the Pt nanoparticles were dominated by PtO2 after the oxidation treatment, which lowered the CO oxidation activity compared with that of the reduced Pt catalyst. (C) 2013, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词[WOS]: METHANE ;  COMBUSTION ;  BACE1-XPDXO3-DELTA ;  TEMPERATURES ;  PALLADIUM ;  OXIDES ;  SILVER
语种: 英语
WOS记录号: WOS:000318744600009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137818
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, Dalian 116024, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Gao Kang,Wei Mingming,Qu Zhenping,et al. Dynamic structural changes of perovskite-supported metal catalysts during cyclic redox treatments and effect on catalytic CO oxidation[J]. CHINESE JOURNAL OF CATALYSIS,2013,34(5):889-897.
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