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  • Zhang, ChuLund 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 (author)

Faceting of Rhodium(553) in Realistic Reaction Mixtures of Carbon Monoxide and Oxygen

  • Article/chapterEnglish2015

Publisher, publication year, extent ...

  • 2015-05-18
  • American Chemical Society (ACS),2015

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:4c771358-5a9f-4912-b854-ee0112215fc7
  • https://research.chalmers.se/publication/216524URI
  • https://doi.org/10.1021/acs.jpcc.5b01841DOI
  • https://lup.lub.lu.se/record/7612591URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • We have investigated the gas composition-dependent faceting of a Rh(553) surface during catalytic CO oxidation under semirealistic reaction conditions using Surface X- ray Diffraction. We find that under stoichiometric CO and O2 conditions, the Rh(553) surface maintains its surface orientation without facet formation. In oxygen excess, the CO oxidation reaction becomes mass transfer limited by the CO diffusion, and the sur- face is observed to expose (331) or (11 ̄1) facets in coexistence with larger (111) terraces. The observed facet formation has previously been observed for pure O2 exposures of the Rh(553) surface, but at significantly lower O2 partial pressures. Surprisingly, in CO excess, which results in a CO poisoned surface with low activity, we instead find coexisting (110) and (111) facets. The reasons for and possible implications of the observed facetings are discussed.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Lundgren, EdvinLund 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(Swepub:lu)slju-elu (author)
  • Carlsson, Per-Anders,1972Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)perc (author)
  • Balmes, OlivierLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)ook2-oba (author)
  • Hellman, Anders,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ahell (author)
  • Merte, LindsayLund 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(Swepub:lu)slju-lmt (author)
  • Shipilin, MikhailLund 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(Swepub:lu)slju-msh (author)
  • Onderwaater, WillemEuropean Synchrotron Radiation Facility (ESRF),Universiteit Leiden (UL),Leiden University (UL) (author)
  • Gustafson, JohanLund 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(Swepub:lu)slju-jgu (author)
  • SynkrotronljusfysikFysiska institutionen (creator_code:org_t)

Related titles

  • In:Journal of Physical Chemistry C: American Chemical Society (ACS)119:21, s. 11646-116521932-74471932-7455

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