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Origin of the high activity of Au/FeOx for low-temperature CO oxidation: Direct evidence for a redox mechanism
Li, Lin; Wang, Aiqin; Qiao, Botao; Lin, Jian; Huang, Yanqiang; Wang, Xiaodong; Zhang, Tao
关键词Gold Iron Oxide Au/feox Co Oxidation Ft-ir Raman Microcalorimetry Redox
刊名JOURNAL OF CATALYSIS
2013-03-01
DOI10.1016/j.jcat.2012.11.019
299页:90-100
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]SUPPORTED GOLD CATALYSTS ; GOLD/IRON-OXIDE CATALYSTS ; IN-SITU DRIFTS ; CARBON-MONOXIDE ; FT-IR ; AU/TIO2 CATALYST ; REACTIVE OXYGEN ; NANOPARTICLES ; AU ; CLUSTERS
英文摘要FeOx-supported gold nanocatalyst is one of the most active catalysts for low-temperature CO oxidation. However, the origin of the high activity is still in debate. In this work, using a combination of surface-sensitive in situ FT-IR, Raman spectroscopy, and microcalorimetry, we provide unambiguous evidence that the surface lattice oxygen of the FeOx support participates directly in the low-temperature CO oxidation, and the reaction proceeds mainly through a redox mechanism. Both the presence of gold and the ferrihydrite nature of the FeOx support promote the redox activity greatly. Calcination treatment has a detrimental effect on the redox activity of the Au/FeOx, which in turn decreases greatly the activity for low-temperature CO oxidation. The gold-assisted redox mechanism was also extended to other metal-supported FeOx catalysts, demonstrating the key role of the FeOx support in catalyzing the CO oxidation reaction. (c) 2012 Elsevier Inc. All rights reserved.
语种英语
WOS记录号WOS:000316774900009
引用统计
被引频次:112[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/137855
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
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GB/T 7714
Li, Lin,Wang, Aiqin,Qiao, Botao,et al. Origin of the high activity of Au/FeOx for low-temperature CO oxidation: Direct evidence for a redox mechanism[J]. JOURNAL OF CATALYSIS,2013,299:90-100.
APA Li, Lin.,Wang, Aiqin.,Qiao, Botao.,Lin, Jian.,Huang, Yanqiang.,...&Zhang, Tao.(2013).Origin of the high activity of Au/FeOx for low-temperature CO oxidation: Direct evidence for a redox mechanism.JOURNAL OF CATALYSIS,299,90-100.
MLA Li, Lin,et al."Origin of the high activity of Au/FeOx for low-temperature CO oxidation: Direct evidence for a redox mechanism".JOURNAL OF CATALYSIS 299(2013):90-100.
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