EFFECT OF COBALT OXIDE ON SURFACE-STRUCTURE OF ALUMINA-SUPPORTED MOLYBDENA CATALYSTS STUDIED BY INSITU RAMAN-SPECTROSCOPY
文献类型：期刊论文
| 作者 | XIN, Q; GAO, XT |
| 刊名 | CATALYSIS LETTERS
 |
| 出版日期 | 1993 |
| 卷号 | 18期号:4页码:409-418 |
| 关键词 | Interaction Molybdenum Oxide Cobalt Oxide Alumina Dehydration Raman Spectroscopy |
| ISSN号 | 1011-372X |
| 文献子类 | Article |
| 英文摘要 | A set of Co promoted 10% Mo/Al2O3 samples have been characterized by means of Raman spectroscopy under ambient as well as in situ dehydrated conditions. Under ambient conditions, the degree of the polymerization of surface molybdenum oxide species decreases with increasing Co loading. Under dehydrated conditions, the polymeric molybdenum oxide species is absent with the addition of only 0.2% Co. At low Co loadings (less-than-or-equal-to 2%), before the formation of CoMoO4 compound, the spectral features are very similar under ambient conditions. Dehydration causes the upward shift of the Mo=O symmetric stretching mode. A broad band around 920-930 cm-1 was thus observed. This band has been suggested to be associated with the Co-Mo interaction species. In contrast to crystalline CoMoO4, this Species shows a reversibility on H-2 reduction-O2 reoxidation treatments. From the results obtained, it is proposed that cobalt oxide interacts with the most polymerized molybdenum oxide species to form Co-Mo interaction species and/or crystalline CoMoO4; therefore, the amount of the surface molybdenum oxide species decreases with a change in the molecular structure as a function of the Co concentration. |
| WOS关键词 | X-RAY PHOTOELECTRON ; GENESIS |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:A1993LA08600011 |
| 出版者 | BALTZER SCI PUBL BV |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/167562]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | CHINESE ACAD SCI,DALIAN INST CHEM PHYS,STATE KEY LAB CATALYSIS,DALIAN 116023,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | XIN, Q,GAO, XT. EFFECT OF COBALT OXIDE ON SURFACE-STRUCTURE OF ALUMINA-SUPPORTED MOLYBDENA CATALYSTS STUDIED BY INSITU RAMAN-SPECTROSCOPY[J]. CATALYSIS LETTERS,1993,18(4):409-418. |
| APA | XIN, Q,&GAO, XT.(1993).EFFECT OF COBALT OXIDE ON SURFACE-STRUCTURE OF ALUMINA-SUPPORTED MOLYBDENA CATALYSTS STUDIED BY INSITU RAMAN-SPECTROSCOPY.CATALYSIS LETTERS,18(4),409-418. |
| MLA | XIN, Q,et al."EFFECT OF COBALT OXIDE ON SURFACE-STRUCTURE OF ALUMINA-SUPPORTED MOLYBDENA CATALYSTS STUDIED BY INSITU RAMAN-SPECTROSCOPY".CATALYSIS LETTERS 18.4(1993):409-418. |
入库方式： OAI收割
来源：大连化学物理研究所
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