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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)
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2008-06-26
DOI10.1021/jp800359p
112期:25页:9387-9393
收录类别SCI
文章类型Article
部门归属5
项目归属503
产权排名1;1
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
关键词[WOS]MOLYBDENUM OXIDE CATALYST ; SELECTIVE OXIDATION ; FERRIC MOLYBDATE ; METHANOL OXIDATION ; ACTIVE COMPONENT ; FORMALDEHYDE OXIDATION ; FE2O3-MOO3 CATALYST ; BEHAVIOR ; TRANSFORMATION ; FE2(MOO4)3
英文摘要Catalytic 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.
语种英语
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WOS记录号WOS:000256920000041
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被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/101285
专题中国科学院大连化学物理研究所
通讯作者Li C(李灿)
作者单位Dalian Inst Chem Phys, Chinese Acad Sci, State Key Lab Catalysis, Dalian 116023, Peoples R China
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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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