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  • Garcia-Martinez, FernandoDeutsches Elektronen-Synchrotron (DESY),Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),University of the Basque Country (author)

Structure Matters: Asymmetric CO Oxidation at Rh Steps with Different Atomic Packing

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022-08-12
  • American Chemical Society (ACS),2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:7e659f6a-1f14-4484-acd6-b5d7b6e021fc
  • https://doi.org/10.1021/jacs.2c06733DOI
  • https://research.chalmers.se/publication/531711URI
  • https://lup.lub.lu.se/record/2def5709-339e-4fbd-8529-09a9e39f9d5fURI

Supplementary language notes

  • Language:English
  • Summary in:English

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Classification

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

Notes

  • Curved crystals are a simple but powerful approach to bridge the gap between single crystal surfaces and nanoparticle catalysts, by allowing a rational assessment of the role of active step sites in gas-surface reactions. Using a curved Rh(111) crystal, here, we investigate the effect of A-type (square geometry) and B-type (triangular geometry) atomic packing of steps on the catalytic CO oxidation on Rh at millibar pressures. Imaging the crystal during reaction ignition with laser-induced CO2 fluorescence demonstrates a two-step process, where B-steps ignite at lower temperature than A-steps. Such fundamental dissimilarity is explained in ambient pressure X-ray photoemission (AP-XPS) experiments, which reveal partial CO desorption and oxygen buildup only at B-steps. AP-XPS also proves that A-B step asymmetries extend to the active stage: at A-steps, low-active O-Rh-O trilayers buildup immediately after ignition, while highly active chemisorbed O is the dominant species on B-type steps. We conclude that B-steps are more efficient than A-steps for the CO oxidation.

Subject headings and genre

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

  • Rämisch, LisaLund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Energiomställningen,LTH profilområden,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,LTH Profile areas,Faculty of Engineering, LTH(Swepub:lu)li4658ra (author)
  • Ali, Khadiza,1989Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),Chalmers tekniska högskola,Chalmers University of Technology,CSIC Centro de Física de Materiales (UPV/EHU)(Swepub:lu)kh4145al (author)
  • Waluyo, IradwikanariBrookhaven National Laboratory (author)
  • Bodero, Rodrigo CastrilloUniversidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),CSIC Centro de Física de Materiales (UPV/EHU) (author)
  • Pfaff, SebastianLund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Energiomställningen,LTH profilområden,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,LTH Profile areas,Faculty of Engineering, LTH(Swepub:lu)se8453pf (author)
  • Villar-Garcia, Ignacio J.El Sincrotrón ALBA,ALBA Synchrotron Light Facility (author)
  • Hunt, AdrianBrookhaven National Laboratory (author)
  • Perez-Dieste, VirginiaEl Sincrotrón ALBA,ALBA Synchrotron Light Facility (author)
  • Lundgren, EdvinLund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,LTH profilområde: Avancerade ljuskällor,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,Faculty of Engineering, LTH(Swepub:lu)slju-elu (author)
  • Schiller, FrederikUniversidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),CSIC Centro de Física de Materiales (UPV/EHU) (author)
  • Ortega, J. EnriqueUniversidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),Donostia International Physics Center,University of the Basque Country,Donostia International Physics Center (DIPC),CSIC Centro de Física de Materiales (UPV/EHU) (author)
  • Walter, Andrew LeighBrookhaven National Laboratory (author)
  • Zetterberg, JohanLund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LTH profilområde: Avancerade ljuskällor,LTH profilområden,LTH profilområde: Energiomställningen,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: The Energy Transition,Faculty of Engineering, LTH(Swepub:lu)forb-jze (author)
  • Deutsches Elektronen-Synchrotron (DESY)Universidad del Pais Vasco / Euskal Herriko Unibertsitatea (creator_code:org_t)

Related titles

  • In:Journal of the American Chemical Society: American Chemical Society (ACS)144:33, s. 15363-153711520-51260002-7863

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