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Thermal Stability o...
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Abb, Marcel J.S.Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany; Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
(författare)
Thermal Stability of Single-Crystalline IrO2(110) Layers : Spectroscopic and Adsorption Studies
- Artikel/kapitelEngelska2020
Förlag, utgivningsår, omfång ...
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2020-06-22
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American Chemical Society (ACS),2020
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13 s.
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LIBRIS-ID:oai:lup.lub.lu.se:220f54c9-8ec8-4790-89e6-9913c423ba71
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https://lup.lub.lu.se/record/220f54c9-8ec8-4790-89e6-9913c423ba71URI
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https://doi.org/10.1021/acs.jpcc.0c04373DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-103939URI
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Språk:engelska
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Sammanfattning på:engelska
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The interaction of ultrathin single-crystalline IrO2(110) films with the gas phase proceeds via the coordinatively unsaturated sites (cus), in particular Ircus, the undercoordinated oxygen species on-top O (Oot) that are coordinated to Ircus, and bridging O (Obr). With the combination of different experimental techniques, such as thermal desorption spectroscopy, scanning tunneling microscopy (STM), high-resolution core-level spectroscopy (HRCLS), infrared spectroscopy, and first-principles studies employing density functional theory calculations, we are able to elucidate surface properties of single-crystalline IrO2(110). We provide spectroscopic fingerprints of the active surface sites of IrO2(110). The freshly prepared IrO2(110) surface is virtually inactive toward gas-phase molecules. The IrO2(110) surface needs to be activated by annealing to 500-600 K under ultrahigh vacuum (UHV) conditions. In the activation step, Ircus sites are liberated from on-top oxygen (Oot) and monoatomic Ir metal islands are formed on the surface, leading to the formation of a bifunctional model catalyst. Vacant Ircus sites of IrO2(110) allow for strong interaction and accommodation of molecules from the gas phase. For instance, CO can adsorb atop on Ircus and water forms a strongly bound water layer on the activated IrO2(110) surface. Single-crystalline IrO2(110) is thermally not very stable although chemically stable. Chemical reduction of IrO2(110) by extensive CO exposure at 473 K is not observed, which is in contrast to the prototypical RuO2(110) system.
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Weber, TimInstitute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany; Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
(författare)
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Langsdorf, DanielInstitute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany; Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
(författare)
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Koller, VolkmarInstitute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany; Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany
(författare)
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Gericke, Sabrina M.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,Combustion Physics, Lund University, Box 118, S-22100 Lund, Sweden(Swepub:lu)sa1864ge
(författare)
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Pfaff, SebastianLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Combustion Physics, Lund University, Box 118, S-22100 Lund, Sweden(Swepub:lu)se8453pf
(författare)
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Busch, MichaelChalmers University of Technology,Division Chemical Physics Department of Physics and Competence Centre for Catalysis, Chalmersplatsen 4, SE-41296 Göteborg, Sweden(Swepub:ltu)micbus
(författare)
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Zetterberg, JohanLund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Combustion Physics, Lund University, Box 118, S-22100 Lund, Sweden(Swepub:lu)forb-jze
(författare)
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Preobrajenski, AlexeiLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,MAX IV Laboratory, E120057, Fontongatan 2, 22484 Lund, Sweden(Swepub:lu)maxl-apr
(författare)
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Grönbeck, HenrikChalmers University of Technology,Division Chemical Physics Department of Physics and Competence Centre for Catalysis, Chalmersplatsen 4, SE-41296 Göteborg, Sweden
(författare)
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Lundgren, EdvinLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research, Lund University, Box 118, S-22100 Lund, Sweden(Swepub:lu)slju-elu
(författare)
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Over, HerbertInstitute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany; Center for Materials Research, Justus Liebig University, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany
(författare)
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Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, Germany; Institute of Physical Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, D-35392 Giessen, GermanyFörbränningsfysik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Physical Chemistry C: American Chemical Society (ACS)124:28, s. 15324-153361932-74471932-7455
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Abb, Marcel J.S.
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Weber, Tim
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Langsdorf, Danie ...
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Koller, Volkmar
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Gericke, Sabrina ...
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Pfaff, Sebastian
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visa fler...
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Busch, Michael
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Zetterberg, Joha ...
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Preobrajenski, A ...
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Grönbeck, Henrik
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Lundgren, Edvin
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Over, Herbert
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