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Surface phase composition of iron molybdate catalysts studied by UV Raman spectroscopy
Xu, Qian; Jia, Guoqing; Zhang, Jing; Feng, Zhaochi; Li, Can; Li C(李灿)
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2008-06-26
DOI10.1021/jp800359p
Volume112Issue:25Pages:9387-9393
Indexed BySCI
SubtypeArticle
Department5
Funding Project503
Contribution Rank1;1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordMOLYBDENUM OXIDE CATALYST ; SELECTIVE OXIDATION ; FERRIC MOLYBDATE ; METHANOL OXIDATION ; ACTIVE COMPONENT ; FORMALDEHYDE OXIDATION ; FE2O3-MOO3 CATALYST ; BEHAVIOR ; TRANSFORMATION ; FE2(MOO4)3
AbstractCatalytic performance depends largely on the surface properties. Here, the surface phase composition of iron molybdate catalysts with different Mo/Fe atomic ratios calcined at different temperatures was studied by UV Raman spectroscopy. In this study, the surface enrichment of MoO3 that the Mo-rich catalysts undergo during calcination treatment is revealed by the increase in the Raman intensity of MoO3. X-ray photoelectron spectroscopy (XPS) analysis provides further evidence that the concentration of Mo increases evidently with increasing calcination temperature. The surface enrichment of MoO3 also results in a significant variation of the morphologic appearance as evidenced by the presence of a needle-like material assigned to MoO3 on the surface, while the surface phase composition remains almost unchangeable for the sample with a stoichiometric atomic ratio. These results are attributable to the formation of a(-) substitution structure of Fell ions in an octahedral coordination by Mo6+ ions in Mo-rich catalysts, and MoO3 is easier to segregate from such a structure as a second phase concentrated on the surface.
Language英语
URL查看原文
WOS IDWOS:000256920000041
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/101285
Collection中国科学院大连化学物理研究所
Corresponding AuthorLi C(李灿)
AffiliationDalian Inst Chem Phys, Chinese Acad Sci, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Xu, Qian,Jia, Guoqing,Zhang, Jing,et al. Surface phase composition of iron molybdate catalysts studied by UV Raman spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(25):9387-9393.
APA Xu, Qian,Jia, Guoqing,Zhang, Jing,Feng, Zhaochi,Li, Can,&李灿.(2008).Surface phase composition of iron molybdate catalysts studied by UV Raman spectroscopy.JOURNAL OF PHYSICAL CHEMISTRY C,112(25),9387-9393.
MLA Xu, Qian,et al."Surface phase composition of iron molybdate catalysts studied by UV Raman spectroscopy".JOURNAL OF PHYSICAL CHEMISTRY C 112.25(2008):9387-9393.
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