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Formation of Epitaxial PdO(100) During the Oxidation of Pd(100)

Mehar, Vikram (author)
Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
Edström, Helen (author)
Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LU profilområde: Ljus och material,Lunds universitets profilområden,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
Shipilin, Mikhail (author)
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,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
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Hejral, Uta (author)
Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LU profilområde: Ljus och material,Lunds universitets profilområden,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
Wu, Chengjun (author)
Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
Kadiri, Aravind (author)
Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
Albertin, Stefano (author)
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,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
Hagman, Benjamin (author)
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,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
von Allmen, Kim (author)
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,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
Weigmann, Tim (author)
Institute of Experimental and Applied Physics, Kiel University, D-24098 Kiel, Germany
Pfaff, Sebastian (author)
Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Division of Combustion Physics, Lund University, SE-221 00 Lund, Sweden
Drnec, Jakub (author)
European Synchrotron Radiation Facility,Experimental Division, ESRF, 71 Avenue des Martyrs, F-38000 Grenoble, France
Zetterberg, Johan (author)
Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Division of Combustion Physics, Lund University, SE-221 00 Lund, Sweden
Lundgren, Edvin (author)
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,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
Merte, Lindsay (author)
Malmö universitet,Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Institutionen för materialvetenskap och tillämpad matematik (MTM)
Gustafson, Johan (author)
Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Avancerade ljuskällor,LTH profilområden,LU profilområde: Ljus och material,Lunds universitets profilområden,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,LTH Profile areas,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Synchrotron Radiation Research, Lund University, Box 118, SE-221 00 Lund, Sweden
Weaver, Jason (author)
Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, United States
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 (creator_code:org_t)
American Chemical Society (ACS), 2023
2023
English 7 s.
In: The Journal of Physical Chemistry Letters. - : American Chemical Society (ACS). - 1948-7185. ; 14:38, s. 8493-8499
Related links:
http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
https://doi.org/10.1...
https://urn.kb.se/re...
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  • Journal article (other academic/artistic)
Abstract Subject headings
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  • The catalytic oxidation of CO and CH4 can be strongly influenced by the structures of oxide phases that form on metallic catalysts during reaction. Here, we show that an epitaxial PdO(100) structure forms at temperatures above 600 K during the oxidation of Pd(100) by gaseous O atoms as well as exposure to O2-rich mixtures at millibar partial pressures. The oxidation of Pd(100) by gaseous O atoms preferentially generates an epitaxial, multilayer PdO(101) structure at 500 K, but initiating Pd(100) oxidation above 600 K causes an epitaxial PdO(100) structure to grow concurrently with PdO(101) and produces a thicker and rougher oxide. We present evidence that this change in the oxidation behavior is caused by a temperature-induced change in the stability of small PdO domains that initiate oxidation. Our discovery of the epitaxial PdO(100) structure may be significant for developing relationships among oxide structure, catalytic activity, and reaction conditions for applications of oxidation catalysis.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
NATURVETENSKAP  -- Kemi -- Oorganisk kemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)

Keyword

chemical structure
epitaxy
oxidation
oxides
surface analysis

Publication and Content Type

art (subject category)
vet (subject category)

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