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题名: Fabrication of Efficient Hydrogenation Nanoreactors by Modifying the Freedom of Ultrasmall Platinum Nanoparticles within Yolk-Shell Nanospheres
作者: Peng, Juan1;  Lan, Guojun1;  Guo, Miao1;  Wei, Xuming1;  Li, Can1;  Yang, Qihua1
关键词: dendrimers ;  heterogeneous catalysis ;  nanoparticles ;  platinum ;  structure-activity relationships
刊名: CHEMISTRY-A EUROPEAN JOURNAL
发表日期: 2015-07-13
DOI: 10.1002/chem.201500762
卷: 21, 期:29, 页:10490-10496
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The synthesis of silica-based yolk-shell nanospheres confined with ultrasmall platinum nanoparticles (Pt NPs) stabilized with poly(amidoamine), in which the interaction strength between Pt NPs and the support could be facilely tuned, is reported. By ingenious utilization of silica cores with different surface wettability (hydrophilic vs. -phobic) as the adsorbent, Pt NPs could be confined in different locations of the yolk-shell nanoreactor (core vs. hollow shell), and thus, exhibit different interaction strengths with the nanoreactor (strong vs. weak). It is interesting to find that the adsorbed Pt NPs are released from the core to the hollow interiors of the yolk-shell nanospheres when a superhydrophobic inner core material (SiO2Ph) is employed, which results in the preparation of an immobilized catalyst (Pt@SiO2Ph); this possesses the weakest interaction strength with the support and shows the highest catalytic activity (88500 and 7080h(-1) for the hydrogenation of cyclohexene and nitrobenzene, respectively), due to its unaffected freedom of Pt NPs for retention of the intrinsic properties.
关键词[WOS]: RUTHENIUM NANOCLUSTER CATALYST ;  MESOPOROUS SILICA NANOSPHERES ;  HETEROGENEOUS CATALYSIS ;  CORE ;  MONODISPERSE ;  OXIDATION ;  ETHYLENE
语种: 英语
WOS记录号: WOS:000357328200031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146386
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, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Peng, Juan,Lan, Guojun,Guo, Miao,et al. Fabrication of Efficient Hydrogenation Nanoreactors by Modifying the Freedom of Ultrasmall Platinum Nanoparticles within Yolk-Shell Nanospheres[J]. CHEMISTRY-A EUROPEAN JOURNAL,2015,21(29):10490-10496.
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