Ultrasmall Platinum Stabilized on Triphenylphosphine-Modified Silica for Chemoselective Hydrogenation

doi:10.1002/chem.201700980

	Ultrasmall Platinum Stabilized on Triphenylphosphine-Modified Silica for Chemoselective Hydrogenation
	Jayakumar, Sanjeevi 1,4; Modak, Arindam 4; Guo, Miao 3,4; Li, He 4; Hu, Xiangping 2; Yang, Qihua 4
刊名	CHEMISTRY-A EUROPEAN JOURNAL
	2017-06-07
卷号	23 页码:7791-7797
关键词	Nanoparticles p Ligands Platinum Polymers Supported Catalysts
DOI	10.1002/chem.201700980
英文摘要	Chemoselective hydrogenation of substrates with more than one functional group that could be hydrogenated is quite challenging and is of fundamental importance. Here, the enhanced chemoselectivity of ultrasmall (< 1 nm) platinum nanoparticles (NPs) stabilized on silica modified with triphenylphosphine (PSiO2) in hydrogenation reactions is reported. Platinum NPs on PSiO2 exhibit much higher selectivity than those on SiO2 in the hydrogenation of acetophenone to 1-phenylethanol (99.9 versus 36%) and hydrogenation of phenylacetylene to styrene (85 versus 52%). The results of NMR spectroscopy, X-ray photoelectron spectroscopy, and in situ CO adsorption FTIR spectroscopy indicate the existence of strong interactions between triphenylphosphine and Pt NPs. Consequently, Pt NPs on PSiO2 have smaller particle sizes and more positive Pt 4 f binding energy than those of Pt/SiO2; these are the main contributors to the superior chemoselectivity of Pt NPs. The organically modified silica could act as an efficient solid ligand for tuning the catalytic performance of metal NPs.
语种	英语
WOS记录号	WOS:000402799200024
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/152194]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Univ Chinese Acad Sci, Int Coll, Beijing 100049, Peoples R China 2.Dalian Inst Chem Phys, Lab Fine Chem, Dalian, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Jayakumar, Sanjeevi,Modak, Arindam,Guo, Miao,et al. Ultrasmall Platinum Stabilized on Triphenylphosphine-Modified Silica for Chemoselective Hydrogenation[J]. CHEMISTRY-A EUROPEAN JOURNAL,2017,23:7791-7797.
APA	Jayakumar, Sanjeevi,Modak, Arindam,Guo, Miao,Li, He,Hu, Xiangping,&Yang, Qihua.(2017).Ultrasmall Platinum Stabilized on Triphenylphosphine-Modified Silica for Chemoselective Hydrogenation.CHEMISTRY-A EUROPEAN JOURNAL,23,7791-7797.
MLA	Jayakumar, Sanjeevi,et al."Ultrasmall Platinum Stabilized on Triphenylphosphine-Modified Silica for Chemoselective Hydrogenation".CHEMISTRY-A EUROPEAN JOURNAL 23(2017):7791-7797.