dc.identifier.uri |
http://dx.doi.org/10.15488/810 |
|
dc.identifier.uri |
http://www.repo.uni-hannover.de/handle/123456789/834 |
|
dc.contributor.author |
Boehn, B. von
|
|
dc.contributor.author |
Preiss, A.
|
|
dc.contributor.author |
Imbihl, R.
|
|
dc.date.accessioned |
2016-12-06T07:56:27Z |
|
dc.date.available |
2017-06-22T22:05:14Z |
|
dc.date.issued |
2016 |
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dc.identifier.citation |
Boehn, B. von; Preiss, A.; Imbihl, R.: Dynamics of ultrathin V-oxide layers on Rh(111) in catalytic oxidation of ammonia and CO. In: Physical chemistry chemical physics : PCCP 18 (2016), Nr. 29, S. 19713-19721. DOI: http://dx.doi.org/10.1039/C6CP03637F |
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dc.description.abstract |
Catalytic oxidation of ammonia and CO has been studied in the 10(-4) mbar range using a catalyst prepared by depositing ultra-thin vanadium oxide layers on Rh(111) (thetaV approximately 0.2 MLE). Using photoemission electron microscopy (PEEM) as a spatially resolving method, we observe that upon heating in an atmosphere of NH3 and O2 the spatial homogeneity of the VOx layer is removed at 800 K and a pattern consisting of macroscopic stripes develops; at elevated temperatures this pattern transforms into a pattern of circular VOx islands. Under reaction conditions the neighboring VOx islands become attracted by each other and coalesce. Similar processes of pattern formation and island coalescence are observed in catalytic CO oxidation. Reoxidation of the reduced VOx catalyst proceeds via surface diffusion of oxygen adsorbed onto Rh(111). A pattern consisting of macroscopic circular VOx islands can also be obtained by heating a Rh(111)/VOx catalyst in pure O2. |
eng |
dc.language.iso |
eng |
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dc.publisher |
Cambridge : Royal Society of Chemistry |
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dc.relation.ispartofseries |
Physical Chemistry Chemical Physics 18 (2016), Nr. 29 |
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dc.rights |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich. |
|
dc.subject |
photoemission electron microscopy (PEEM) |
eng |
dc.subject |
Rh(111) |
eng |
dc.subject |
physical chemistry |
eng |
dc.subject.ddc |
540 | Chemie
|
ger |
dc.title |
Dynamics of ultrathin V-oxide layers on Rh(111) in catalytic oxidation of ammonia and CO |
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dc.type |
Article |
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dc.type |
Text |
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dc.relation.essn |
1463-9084 |
|
dc.relation.issn |
1463-9076 |
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dc.relation.doi |
http://dx.doi.org/10.1039/C6CP03637F |
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dc.bibliographicCitation.issue |
29 |
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dc.bibliographicCitation.volume |
18 |
|
dc.bibliographicCitation.firstPage |
19713 |
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dc.bibliographicCitation.lastPage |
19721 |
|
dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
|