Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse   (111)- and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes

doi:10.1021/la101213q

CORC > 北京大学 > 化学与分子工程学院

	Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse (111)- and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes
	Zhang, Yawen ; Grass, Michael E. ; Huang, Wenyu ; Somorjai, Gabor A.
刊名	langmuir
	2010
关键词	SHAPE-CONTROLLED SYNTHESIS BLODGETT MONOLAYER FORMATION PLATINUM NANOCRYSTALS SELECTIVE SYNTHESIS METAL NANOCRYSTALS CATALYTIC-ACTIVITY GOLD NANOCRYSTALS NANOPARTICLES HYDROGENATION PALLADIUM
DOI	10.1021/la101213q
英文摘要	Monodisperse sub-10 nm (6.5 nm) sized Rh nanocrystals with (111) and (100) surface structures were synthesized by a seedless polyol reduction in ethylene glycol, with poly(vinylpyrrolidone) as a capping ligand. When using [Rh(Ac)(2)](2) as the metal precursor, (111)-oriented Rh nanopolyhedra containing 76% (111)-twinned hexagons (in 2D projection) were obtained; whereas, when employing RhCl(3) as the metal precursor in the presence of alkylammonium bromide, such as tetramethylammonium bromide and trimethyl(tetradecyl)ammonium bromide, (100)-oriented Rh nanocubes were obtained with 85% selectivity. The {100} faces of the Rh nanocrystals are stabilized by chemically adsorbed Br(-) ions from alkylammonium bromides, which led to (100)-oriented nanocubes. Monolayer films of the (111)-oriented Rh nanopolyhedra and (100)-oriented Rh nanocubes were deposited on silicon wafers in a Langmuir-Blodgett trough to make model 2D nanoarray catalysts. These nanocatalysts were active for CO oxidation by O(2), and the turnover frequency was independent of nanoparticle shape, consistent with that previously observed for Rh(111) and Rh(100) single crystals.; Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary; SCI(E); EI; PubMed; 17; ARTICLE; 21; 16463-16468; 26
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/150075]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Zhang, Yawen,Grass, Michael E.,Huang, Wenyu,et al. Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse (111)- and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes[J]. langmuir,2010.
APA	Zhang, Yawen,Grass, Michael E.,Huang, Wenyu,&Somorjai, Gabor A..(2010).Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse (111)- and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes.langmuir.
MLA	Zhang, Yawen,et al."Seedless Polyol Synthesis and CO Oxidation Activity of Monodisperse (111)- and (100)-Oriented Rhodium Nanocrystals in Sub-10 nm Sizes".langmuir (2010).