ICCAS OpenIR
Particle growth and redispersion of monodisperse rhodium nanoparticles supported by porous carbon microspherules during catalyzing vapor phase methanol carbonylation
Li, Fengbo; Qian, Qingli; Yan, Fan; Yuan, Guoqing
2008-02-15
Source PublicationMATERIALS CHEMISTRY AND PHYSICS
ISSN0254-0584
Volume107Issue:2-3Pages:310-316
AbstractMonodisperse Rh nanoparticles mounted in the porous carbon microspherules were synthesized through the controlled carbonization of poly(vinylidene chloride) beads containing di-mu-chlorotetracarbonyidirhodium as Rh precursors. Rh nanoparticles were formed spontaneously and simultaneously with the evolution of carbon structures from the composite polymeric precursors. X-ray photoelectron spectroscopy (XPS) was used to detect the transformation of high valent Rh species to zero-valent Rh atoms. The dispersion state and particle size were characterized by EPMA and TEM in detail. The as-synthesized Rh nanoparticles were in the monodisperse state with the particle size of about 10 nm. Under catalytic vapor phase methanol carbonylation conditions, particle growth and redispersion take place through a mechanism involving the formation and transportation of Rh-containing volatile molecules. This is evidenced by the comparison of the dispersion state and particle size of the supported Rh nanoparticles before and after catalyzing vapor phase methanol carbonylation. It is clearly demonstrated that the Rh nanoparticles move to the support's surface and grow to about 30 nm after 50-h reaction on stream. (C) 2007 Elsevier B.V. All rights reserved.
KeywordNanostructures Chemical Synthesis Electron Microscopy Phase Transitions
DOI10.1016/j.matchemphys.2007.07.017
Indexed BySCI
Language英语
WOS IDWOS:000252580400022
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64602
Collection中国科学院化学研究所
Corresponding AuthorYuan, Guoqing
AffiliationChinese Acad Sci, Inst Chem, Lab New Mat, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Li, Fengbo,Qian, Qingli,Yan, Fan,et al. Particle growth and redispersion of monodisperse rhodium nanoparticles supported by porous carbon microspherules during catalyzing vapor phase methanol carbonylation[J]. MATERIALS CHEMISTRY AND PHYSICS,2008,107(2-3):310-316.
APA Li, Fengbo,Qian, Qingli,Yan, Fan,&Yuan, Guoqing.(2008).Particle growth and redispersion of monodisperse rhodium nanoparticles supported by porous carbon microspherules during catalyzing vapor phase methanol carbonylation.MATERIALS CHEMISTRY AND PHYSICS,107(2-3),310-316.
MLA Li, Fengbo,et al."Particle growth and redispersion of monodisperse rhodium nanoparticles supported by porous carbon microspherules during catalyzing vapor phase methanol carbonylation".MATERIALS CHEMISTRY AND PHYSICS 107.2-3(2008):310-316.
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