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题名: Accelerated catalytic activity of Pd NPs supported on amine-rich silica hollow nanospheres for quinoline hydrogenation
作者: Guo, Miao1, 2;  Li, Can1;  Yang, Qihua1
刊名: CATALYSIS SCIENCE & TECHNOLOGY
发表日期: 2017-06-07
DOI: 10.1039/c7cy00394c
卷: 7, 页:2221-2227
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: Tuning the catalytic performance of metal nanoparticles (NPs) is very important in nanocatalysis. Herein, we report that amine- rich mesoporous silica hollow nanospheres (HS-NH2) synthesized by one-pot condensation could efficiently stabilize ultra-small Pd NPs and also increase the surface electron density of Pd NPs due to the coordinating and electron-donating effects of the amine group. Pd NPs supported on HSNH2 afford TOF as high as 5052 h(-1) in quinoline hydrogenation reaction and are much more active than Pd/C with a TOF of 960 h(-1) as well as most reported solid catalysts. The intrinsic activity of Pd NPs increases as the particle size of Pd decreases, revealing that quinoline hydrogenation is a structure-sensitive reaction. The results of TEM, XPS, CO adsorption and CO stripping voltammetry indicate that the high activity of Pd NPs supported on HS-NH2 is mainly attributed to their ultra-small particle size and high surface electron density. Our primary results demonstrate that the organo-modified silica nanospheres are promising solid supports for modifying the electronic properties of metal NPs supported and consequently tailoring their catalytic functions.
关键词[WOS]: CHEMOSELECTIVE HYDROGENATION ;  SELECTIVE CATALYSTS ;  MILD CONDITIONS ;  NANOPARTICLES ;  EFFICIENT ;  SIZE ;  NANOSTRUCTURES ;  OXIDATION ;  CLUSTERS ;  CARBON
语种: 英语
WOS记录号: WOS:000403002700008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152246
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, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Guo, Miao,Li, Can,Yang, Qihua. Accelerated catalytic activity of Pd NPs supported on amine-rich silica hollow nanospheres for quinoline hydrogenation[J]. CATALYSIS SCIENCE & TECHNOLOGY,2017,7:2221-2227.
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