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题名: RAMAN SPECTROSCOPIC STUDY OF MoO3/TiO2-Al2O3 CATALYST
作者: Wei Zhaobin1;  Wei Chengdong1;  Xin Qin1
关键词: LRS ;  Surface structure of catalyst ;  Catalyst of Mo/Al2O3 and Mo/TiO2-Al2O3 ;  Co-Mo Catalyst
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1992
DOI: 10.3866/PKU.WHXB19920224
卷: 8, 期:2, 页:261-265
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Raman spectrum was used to characterize the structure of Mo species supported on TiO2-modified Al2O3. For Mo/Al2O3 without TiO2 samples the bands at 325-350 cm(-1) aid 930-940 cm(-1) assigned as tetrahedral MoO2, and the bands at 215 and 959 cm(-1) as octahedral MoO6-6 can be observed at lower MoO3 loading, while Al-2(MoO4)(3) phase and crystalline MoO3 appeared respectively at 370, 1004 cm(-1) and 822,991cm(-1) when the amount of MoO3 was beyond one monolayer dispersion on Al2O3 surface. As for Mo/TiO2-Al2O3 samples, only octahedral MoO6-6 and crystalline MoO3, but no tetrahedral MoO4-2 and Al-2(MoO4)(3) phases had been detected at low or high MoO3 loadings, even calcination temperature of the samples raised to 973 K, which reveals that TiO2 covered on Al2O3 can weaken the interaction between MoO3 and Al2O3 and inhibits the formation of Al-2(MoO4)(3) phase. When a definite amount of CoO added into molybdena samples the bands of crystalline MoO3 disappeared, suggesting that CoO can effectively promote the dispersion of MoO3 on the carrier. The presence of CoMoO4 phase was observed in Al2O3 or TiO2-Al2O, carriers.
语种: 英语
WOS记录号: WOS:000207574200024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139884
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Wei Zhaobin,Wei Chengdong,Xin Qin. RAMAN SPECTROSCOPIC STUDY OF MoO3/TiO2-Al2O3 CATALYST[J]. ACTA PHYSICO-CHIMICA SINICA,1992,8(2):261-265.
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