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题名: Tailoring the Oxidation Activity of Pt Nanoclusters via Encapsulation
作者: Zhang, Fan1;  Jiao, Feng1;  Pan, Xiulian1;  Gao, Kang2;  Xiao, Jianping1;  Zhang, Shuo3;  Bao, Xinhe1
关键词: platinum ;  cluster ;  confined catalysis ;  carbon nanotube ;  toluene oxidation
刊名: ACS CATALYSIS
发表日期: 2015-02-01
DOI: 10.1021/cs501763k
卷: 5, 期:2, 页:1381-1385
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: To tailor the catalytic activities of metal catalysts at will to achieve efficient conversion in chemical processes remains a challenge, particularly for noble metals, such as Pt. We demonstrate herein that encapsulation within the carbon nanotube (CNT) channels with a diameter of 1.0-1.5 nm not only allows restriction of the size of Pt nanoclusters around 1.0 nm but also enables modulating of the Pt species at the active reduced states through host guest interaction. The encapsulated Pt is protected from oxygen under reaction conditions in toluene oxidation up to 200 degrees C, as unveiled by in situ X-ray absorption spectroscopy and density functional theory calculations. As a result, the encapsulated Pt clusters deliver a remarkably higher activity and stability than the clusters located on the open surfaces of the CNT exterior walls and carbon black support, although the latter are much more accessible to reactants. This characteristic of the CNT channels can be explored to tune the properties of other metal catalysts for oxidation reactions.
关键词[WOS]: ORGANIC-COMPOUNDS VOCS ;  CARBON NANOTUBES ;  CATALYTIC-OXIDATION ;  METAL-CLUSTERS ;  PLATINUM CLUSTERS ;  OXYGEN REDUCTION ;  PARTICLE-SIZE ;  O-XYLENE ;  TOLUENE ;  HYDROGENATION
语种: 英语
WOS记录号: WOS:000349275300097
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145982
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.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Sch Chem Engn, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China

Recommended Citation:
Zhang, Fan,Jiao, Feng,Pan, Xiulian,et al. Tailoring the Oxidation Activity of Pt Nanoclusters via Encapsulation[J]. ACS CATALYSIS,2015,5(2):1381-1385.
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