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Morphologic effects of nano CeO2-TiO2 on the performance of Au/CeO2-TiO2 catalysts in low-temperature CO oxidation
Li, SN; Zhu, HQ; Qin, ZF; Wang, GF; Zhang, YG; Wu, ZW; Li, ZK; Chen, G; Dong, WW; Wu, ZH; Zheng, LR; Zhang, J; Hu, TD; Wang, JG;吴忠华; Zheng LR(郑黎荣); Zhang J(张静); Hu TD(胡天斗)
2014
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
ISSN0926-3373
EISSN1873-3883
Volume144Pages:498-506
AbstractCeO2-TiO2 composite nanorods and nanoparticles were synthesized by hydrothermal and co-precipitation methods, respectively; with the CeO2-TiO2 composite of different morphologies as supports, Au/CeO2-TiO2 catalysts were prepared by the colloidal deposition method and used in CO oxidation at ambient temperature. N-2 sorption, XRD, HRTEM, H-2-TPR, XPS and XAS characterizations were used to clarify the relationship between the morphologic properties of CeO2-TiO2 and the catalytic performance of Au/CeO2-TiO2. HRTEM results show that Au/CeO2-TiO2 nanorods are dominated by CeO2 nanocrystals with (1 1 0) and (1 0 0) facets, while the Au/CeO2-TiO2 nanoparticles mainly expose (1 1 1) planes. XPS and XAS results reveal that both Au/CeO2-TiO2 nanorods and Au/CeO2-TiO2 nanoparticles are similar in the state of gold species. H-2-TPR results indicate that the presence of Au strongly promotes the reduction of CeO2 in the Au/CeO2-TiO2 nanorods. The catalytic activity of Au/CeO2-TiO2 in CO oxidation is strongly related to the morphology of CeO2-TiO2; the CeO2-TiO2 nanorods as support endow the Au/CeO2-TiO2 catalyst with much higher activity than the CeO2-TiO2 nanoparticles. The (1 1 0) and (1 0 0) facets of CeO2 dominated in the Au/CeO2-TiO2 nanorods are able to promote the oxygen migration and gold dispersion, which may then evidently enhance the redox capacity and catalytic activity of the Au/CeO2-TiO2 nanorods in CO oxidation at low temperature. (C) 2013 Elsevier B.V. All rights reserved.
KeywordMorphology Ceria Titania Gold CO oxidation
Subject AreaChemistry; Engineering
DOI10.1016/j.apcatb.2013.07.049
Indexed BySCI
Language英语
WOS IDWOS:000327686200059
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224817
Collection多学科研究中心
Recommended Citation
GB/T 7714
Li, SN,Zhu, HQ,Qin, ZF,et al. Morphologic effects of nano CeO2-TiO2 on the performance of Au/CeO2-TiO2 catalysts in low-temperature CO oxidation[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2014,144:498-506.
APA Li, SN.,Zhu, HQ.,Qin, ZF.,Wang, GF.,Zhang, YG.,...&胡天斗.(2014).Morphologic effects of nano CeO2-TiO2 on the performance of Au/CeO2-TiO2 catalysts in low-temperature CO oxidation.APPLIED CATALYSIS B-ENVIRONMENTAL,144,498-506.
MLA Li, SN,et al."Morphologic effects of nano CeO2-TiO2 on the performance of Au/CeO2-TiO2 catalysts in low-temperature CO oxidation".APPLIED CATALYSIS B-ENVIRONMENTAL 144(2014):498-506.
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