Step enhanced dehydrogenation of ethanol on Rh
文献类型：期刊论文
| 作者 | Resta, Andrea1; Gustafson, Johan1; Westerstrom, Rasmus1; Mikkelsen, Anders1; Lundgren, Edvin1; Andersen, Jesper N.1; Yang, Ming-Mei2; Ma, Xiu-Fang2; Bao, Xin-He2; Li, Wei-Xue2 |
| 刊名 | surface science
 |
| 出版日期 | 2008-09-15 |
| 卷号 | 602期号:18页码:3057-3063 |
| 关键词 | Density functional calculations Photoelectron spectroscopy Chemisorption Catalysis Surface chemical reaction Rh soft X-ray photoelectron spectroscopy ethanol synchrotron radiation photoelectron spectroscopy methylidyne ethylidyne C CO H |
| ISSN号 | 0039-6028 |
| 产权排序 | 2;7 |
| 通讯作者 | j.n.andersen |
| 英文摘要 | we have investigated the adsorption and decomposition of ethanol on the rh(111) and rh(5 5 3) surfaces at room temperature with special emphasis on the dehydrogenation. we use high resolution core level photoemission and density functional theory (dft) based simulations. a detailed analysis of the c1s core level spectra, including analysis of the vibrational fine-structure and comparison to calculated c1s binding energy shifts, shows that the ethanol decomposes into co, ethylidyne (c2h3) methylidyne (ch), atomic c, and hydrogen. at low ethanol exposures, ch is the dominating hydrocarbon fragment on rh(111), whereas on rh(553) atomic c dominates over ch, indicating an enhanced dehydrogenation due to the steps present on the latter surface. at higher ethanol exposures we find a similar behavior of atomic c dominating over hydrocarbons on rh(553), while on rh(111) atomic carbon remains a minority species. our dft based simulations show that the enhanced dehydrogenation results from a significant lowering of the ch dissociation barrier from rh(111) to rh(553), as well as from the dissociation changing from endothermic on rh(111) to exothermic on rh(553). (c) 2008 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical ; physics, condensed matter |
| 研究领域[WOS] | chemistry ; physics |
| 关键词[WOS] | c-1s photoemission ; adsorption ; rh(111) ; methane ; spectra ; temperature ; ethylidyne ; catalysts ; molecules ; hydrogen |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000260550500018 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/100287]  |
| 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 | 1.Lund Univ, Inst Phys, Dept Synchrotron Radiat Res, S-22100 Lund, Sweden 2.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 | Resta, Andrea,Gustafson, Johan,Westerstrom, Rasmus,et al. Step enhanced dehydrogenation of ethanol on Rh[J]. surface science,2008,602(18):3057-3063. |
| APA | Resta, Andrea.,Gustafson, Johan.,Westerstrom, Rasmus.,Mikkelsen, Anders.,Lundgren, Edvin.,...&Li, Wei-Xue.(2008).Step enhanced dehydrogenation of ethanol on Rh.surface science,602(18),3057-3063. |
| MLA | Resta, Andrea,et al."Step enhanced dehydrogenation of ethanol on Rh".surface science 602.18(2008):3057-3063. |
入库方式： OAI收割
来源：大连化学物理研究所
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