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Structure and Reducibility of NiO-MoO3/gamma-Al2O3 Catalysts: Effects of Loading and Molar Ratio
Wang, Yuguang1; Xiong, Guang1; Liu, Xin1; Yu, Xiaochuan1; Liu, Liping1; Wang, Junying2; Feng, Zhaochi2; Li, Can2
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2008-11-06
DOI10.1021/jp800182j
Volume112Issue:44Pages:17265-17271
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordSELECTIVE OXIDATION CATALYSTS ; MOLYBDENUM OXIDE CATALYSTS ; NICKEL MOLYBDATE CATALYSTS ; LASER RAMAN-SPECTROSCOPY ; MO-O SYSTEM ; SOL-GEL ; C-4 HYDROCARBONS ; MALEIC-ANHYDRIDE ; EXCESS MOO3 ; NIMO/TIO2-AL2O3 CATALYSTS
AbstractThe effects of loading and molar ratio on the structure and reducibility of NiO-MoO3/gamma-Al2O3 catalysts have been investigated. Particular attention is given to the catalysts with excess of Mo. The catalysts were prepared by impregnation method and characterized by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and temperature-programmed reduction techniques. Results from Raman, XPS, and XRD show that different surface species can be formed depending on the loading and molar ratio. At low loading spinel-like NiAl2O4 and dispersed MoO3 are the major species on gamma-Al2O3, With increasing the loading the aggregation of the Mo species occurs. Only at high loading are crystalline beta-NiMoO4 and MoO3 formed on the surface. For the first time, excess Mo was found to promote the formation of beta-NiMoO4 on gamma-Al2O3. The change in the structure of the catalysts has a large influence on their reducibility, suggesting that both the structure and oxidation-reduction properties of the NiO-MoO3/gamma-Al2O3 catalysts can be controlled by varying the loading and molar ratio.
Language英语
WOS IDWOS:000260533200038
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/141112
Collection中国科学院大连化学物理研究所
Affiliation1.Dalian Univ Technol, Dept Catalysis Chem & Engn, State Key Lab Fine Chem, Dalian 116012, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yuguang,Xiong, Guang,Liu, Xin,et al. Structure and Reducibility of NiO-MoO3/gamma-Al2O3 Catalysts: Effects of Loading and Molar Ratio[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(44):17265-17271.
APA Wang, Yuguang.,Xiong, Guang.,Liu, Xin.,Yu, Xiaochuan.,Liu, Liping.,...&Li, Can.(2008).Structure and Reducibility of NiO-MoO3/gamma-Al2O3 Catalysts: Effects of Loading and Molar Ratio.JOURNAL OF PHYSICAL CHEMISTRY C,112(44),17265-17271.
MLA Wang, Yuguang,et al."Structure and Reducibility of NiO-MoO3/gamma-Al2O3 Catalysts: Effects of Loading and Molar Ratio".JOURNAL OF PHYSICAL CHEMISTRY C 112.44(2008):17265-17271.
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