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Step enhanced dehyd...
Step enhanced dehydrogenation of ethanol on Rh
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- Resta, Andrea (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Gustafson, Johan (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Westerström, Rasmus (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Mikkelsen, Anders (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Lundgren, Edvin (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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- Andersen, Jesper N (författare)
- Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Yang, Ming-Mei (författare)
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Ma, Xiu-Fang (författare)
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Bao, Xin-He (författare)
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Li, Wei-Xue (författare)
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(creator_code:org_t)
- Elsevier BV, 2008
- 2008
- Engelska.
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Ingår i: Surface Science. - : Elsevier BV. - 0039-6028. ; 602:18, s. 3057-3063
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- spectroscopy
- synchrotron radiation photoelectron
- photoelectron spectroscopy
- Density functional calculations
- soft X-ray
- Photoelectron spectroscopy
- Surface chemical reaction
- Catalysis
- Chemisorption
- Rh
- H
- CO
- C
- ethylidyne
- methylidyne
- ethanol
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Resta, Andrea
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Gustafson, Johan
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Westerström, Ras ...
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Mikkelsen, Ander ...
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Lundgren, Edvin
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Andersen, Jesper ...
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visa fler...
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Yang, Ming-Mei
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Ma, Xiu-Fang
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Bao, Xin-He
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Li, Wei-Xue
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visa färre...
- Om ämnet
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- NATURVETENSKAP
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NATURVETENSKAP
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och Fysik
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och Atom och molekyl ...
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Surface Science
- Av lärosätet
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Lunds universitet