ICCAS OpenIR
General and facile synthesis of ceria-based solid solution nanocrystals and their catalytic properties
Zhou, Huan-Ping1; Si, Rui1; Song, Wei-Guo2; Yan, Chun-Hua1
2009-09-01
Source PublicationJOURNAL OF SOLID STATE CHEMISTRY
ISSN0022-4596
Volume182Issue:9Pages:2475-2485
AbstractUniform Ce(1-x)Zr(x)O(2) (x = 0.2-0.8) nanocrystals with ultra-small size were synthesized through a thermolysis process, facilitated by the initial formation of precursor (hydrated (Ce, Zr)-hydroxides) at low temperature. TEM, XRD, EDAX, and Raman spectra were employed to study the formation of the solid solutions with various Ce/Zr ratios. Ultraviolet-visible (UV-vis) spectra showed that the ratios of Ce(3+) to Ce(4+) in both surface and bulk for the as-prepared Ce(1-x)Zr(x)O(2) nanocrystals increased with the zirconium content x. The well-distributed Zr and Ce in the hydrated (Ce,Zr)-hydroxides before their thermolysis became the crucial factor for the structural homogeneity of the products. In addition, this strategy was extended to the synthesis of Ce(1-x)Gd(x)O(1-x/2), Ce(1-x)Sm(x)O(1-x/2), and Ce(1-x)Sn(x)O(2) solid solutions. Catalytic measurements indicated that the ceria-based catalysts were active for CO oxidation at temperatures beyond 250 degrees C and the sequence of catalytic activity was Ce(0.5)Zr(0.5)O(2) > Ce(0.8)Zr(0.2)O(2) > Ce(0.2)Zr(0.8)O(2) > Ce(0.5)Sm(0.5)O(1.75). (C) 2009 Elsevier Inc. All rights reserved.
KeywordSolid Solutions Ultra-small Nanocrystals Ceria-based Material Catalytic Property
DOI10.1016/j.jssc.2009.07.002
Indexed BySCI
Language英语
WOS IDWOS:000274638600021
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68070
Collection中国科学院化学研究所
Corresponding AuthorYan, Chun-Hua
Affiliation1.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhou, Huan-Ping,Si, Rui,Song, Wei-Guo,et al. General and facile synthesis of ceria-based solid solution nanocrystals and their catalytic properties[J]. JOURNAL OF SOLID STATE CHEMISTRY,2009,182(9):2475-2485.
APA Zhou, Huan-Ping,Si, Rui,Song, Wei-Guo,&Yan, Chun-Hua.(2009).General and facile synthesis of ceria-based solid solution nanocrystals and their catalytic properties.JOURNAL OF SOLID STATE CHEMISTRY,182(9),2475-2485.
MLA Zhou, Huan-Ping,et al."General and facile synthesis of ceria-based solid solution nanocrystals and their catalytic properties".JOURNAL OF SOLID STATE CHEMISTRY 182.9(2009):2475-2485.
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