Characterization of Rh-based catalysts with EPR, TPR, IR and XPS
文献类型：期刊论文
| 作者 | Wang, Y; Song, Z; Ma, D; Luo, HY; Liang, DB; Bao, XH |
| 刊名 | journal of molecular catalysis a-chemical
 |
| 出版日期 | 1999-12-15 |
| 卷号 | 149期号:1-2页码:51-61 |
| 关键词 | characterization Rh catalyst EPR TPR IR XPS |
| 英文摘要 | rh-based catalysts to be used for the synthesis of c-2-oxygenates from syngas were characterized with epr, tpr, ir and xps methods. the chemical state of the mn component was extensively studied with epr after in situ reduction and treatment with various probe molecules. the results indicated that on the mn/sio2 catalyst, mn can exist as isolated mn2+ ions on the surface of sio2 through the formation of coordination compounds with surface hydroxyls and h2o molecules as ligands. thermal reduction of the mn/sio2 catalyst resulted in the migration and accumulation of the mn2+ ions. the results of tpr, ir, xps were consistent with those of epr, which indicated that on a rh-mn/sio2 catalyst, a rh-mn mixed oxide was formed, which stabilized the rh+ species. the formation of small clusters of the rh-mn mixed oxide inhibited deep reduction and accumulation of the mn component, while at the same time increased the dispersion of the rh component. as a promoter, mn acts as an electron acceptor, while li exhibits an electron-donation effect. the li component can inhibit the formation of rh-mn mixed oxide and increase the concentration of rh-0 on the surface of sio2. the existence of li may also cause the tilted-adsorption form of co on rh, as well as the spillover of h-2 from rh to the sio2 support. (c) 1999 elsevier science b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | supported rhodium catalysts ; co hydrogenation ; promoted rhodium ; syngas ; acetaldehyde ; manganese ; pressure ; rhmn/nay ; mn |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000084148900006 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/138210]  |
| 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 | Wang, Y,Song, Z,Ma, D,et al. Characterization of Rh-based catalysts with EPR, TPR, IR and XPS[J]. journal of molecular catalysis a-chemical,1999,149(1-2):51-61. |
| APA | Wang, Y,Song, Z,Ma, D,Luo, HY,Liang, DB,&Bao, XH.(1999).Characterization of Rh-based catalysts with EPR, TPR, IR and XPS.journal of molecular catalysis a-chemical,149(1-2),51-61. |
| MLA | Wang, Y,et al."Characterization of Rh-based catalysts with EPR, TPR, IR and XPS".journal of molecular catalysis a-chemical 149.1-2(1999):51-61. |
入库方式： OAI收割
来源：大连化学物理研究所
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