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  Atmospheric pressure X-ray photoelectron spectroscopy apparatus: Bridging the pressure gap

Velasco Vélez, J., Pfeifer, V., Hävecker, M., Wang, R., Centeno, A., Zurutuza, A., et al. (2016). Atmospheric pressure X-ray photoelectron spectroscopy apparatus: Bridging the pressure gap. Review of Scientific Instruments, 87(5): 053121. doi:10.1063/1.4951724.

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 Urheber:
Velasco Vélez, Juan1, 2, Autor           
Pfeifer, Verena1, Autor           
Hävecker, Michael1, 3, Autor           
Wang, Ruizhi4, Autor
Centeno, Alba5, Autor
Zurutuza, Amaia5, Autor
Algara-Siller, Gerardo1, Autor           
Stotz, Eugen1, Autor           
Skorupska, Katarzyna3, Autor
Teschner, Detre1, Autor           
Kube, Pierre1, Autor           
Braeuninger-Weimer, Philipp, Autor
Hofmann, Stephan, Autor
Schlögl, Robert1, Autor           
Knop-Gericke, Axel1, Autor           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2MPI for Chemical Energy Conversion, ou_persistent22              
3Department of Heterogeneous Reactions, Max Planck Institute for Chemical Energy Conversion, Mülheim an der Ruhr 45470, Germany, ou_persistent22              
4Engineering Department, University of Cambridge, Cambridge CB3 0FA, United Kingdom, ou_persistent22              
5Graphenea, San Sebastian 20018, Spain, ou_persistent22              

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 Zusammenfassung: One of the main goals in catalysis is the characterization of solid/gas interfaces in a reaction environment. The
electronic structure and chemical composition of surfaces become heavily influenced by the surrounding
environment. However, the lack of surface sensitive techniques that are able to monitor these modifications
under high pressure conditions hinders the understanding of such processes. This limitation is known
throughout the community as the “pressure gap”. We have developed a novel experimental setup that provides
chemical information on a molecular level under atmospheric pressure and in presence of reactive gases and at
elevated temperatures. This approach is based on separating the vacuum environment from the high-pressure
environment by a silicon nitride grid–that contains an array of micrometer-sized holes–coated with a bilayer of
graphene. Using this configuration, we have investigated the local electronic structure of catalysts by means of
photoelectron spectroscopy, and in presence of gases at 1 atmosphere. The reaction products were monitored
on-line by mass spectrometry and gas chromatography. The successful operation of this setup was
demonstrated with three different examples: the oxidation/reduction reaction of iridium (noble metal) and
copper (transition metal) nanoparticles and with the hydrogenation of propyne on Pd black catalyst (powder).

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 Datum: 2016-05-102016-05-252016-05
 Publikationsstatus: Erschienen
 Seiten: 14
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1063/1.4951724
 Art des Abschluß: -

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Projektname : GRAFOL - GRAPHENE CHEMICAL VAPOUR DEPOSITION: ROLL TO ROLL TECHNOLOGY
Grant ID : 285275
Förderprogramm : Funding Programme 7 (FP7)
Förderorganisation : European Commission (EC)

Quelle 1

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Titel: Review of Scientific Instruments
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Melville, NY : AIP Publishing
Seiten: 14 Band / Heft: 87 (5) Artikelnummer: 053121 Start- / Endseite: - Identifikator: ISSN: 0034-6748
CoNE: https://pure.mpg.de/cone/journals/resource/991042742033452