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Structure Matters: ...
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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 ...
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2022-08-12
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American Chemical Society (ACS),2022
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:research.chalmers.se:7e659f6a-1f14-4484-acd6-b5d7b6e021fc
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https://doi.org/10.1021/jacs.2c06733DOI
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https://research.chalmers.se/publication/531711URI
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https://lup.lub.lu.se/record/2def5709-339e-4fbd-8529-09a9e39f9d5fURI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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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 ...)
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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)
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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)
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Waluyo, IradwikanariBrookhaven National Laboratory
(author)
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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)
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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)
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Villar-Garcia, Ignacio J.El Sincrotrón ALBA,ALBA Synchrotron Light Facility
(author)
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Hunt, AdrianBrookhaven National Laboratory
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Perez-Dieste, VirginiaEl Sincrotrón ALBA,ALBA Synchrotron Light Facility
(author)
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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)
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Schiller, FrederikUniversidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),CSIC Centro de Física de Materiales (UPV/EHU)
(author)
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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)
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Walter, Andrew LeighBrookhaven National Laboratory
(author)
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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)
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Deutsches Elektronen-Synchrotron (DESY)Universidad del Pais Vasco / Euskal Herriko Unibertsitatea
(creator_code:org_t)
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In:Journal of the American Chemical Society: American Chemical Society (ACS)144:33, s. 15363-153711520-51260002-7863
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