dc.contributor.author | García Martínez, Fernando | |
dc.contributor.author | Rämisch, Lisa | |
dc.contributor.author | Ali, Khadiza | |
dc.contributor.author | Waluyo, Iradwikanari | |
dc.contributor.author | Castrillo Bodero, Rodrigo | |
dc.contributor.author | Pfaff, Sebastian | |
dc.contributor.author | Villar García, Ignacio J. | |
dc.contributor.author | Walter, Andrew Leigh | |
dc.contributor.author | Hunt, Adrian | |
dc.contributor.author | Pérez Dieste, Virginia | |
dc.contributor.author | Zetterberg, Johan | |
dc.contributor.author | Lundgren, Edvin | |
dc.contributor.author | Schiller, Frederik | |
dc.contributor.author | Ortega Conejero, José Enrique | |
dc.date.accessioned | 2022-11-09T16:56:50Z | |
dc.date.available | 2022-11-09T16:56:50Z | |
dc.date.issued | 2022-08 | |
dc.identifier.citation | Journal of the American Chemical Society 144(33) : 15363–15371 (2022) | es_ES |
dc.identifier.issn | 0002-7863 | |
dc.identifier.issn | 1520-5126 | |
dc.identifier.uri | http://hdl.handle.net/10810/58290 | |
dc.description.abstract | 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. | es_ES |
dc.description.sponsorship | We acknowledge financial support from Grant Nos. PID2020-116093RB-C44 and PID2019-107338RB-C6-3, funded by the Spanish MCIN/AEI/10.13039/501100011033 and by "ERDF Away of making Europe", the Basque Government (Grant No. IT-1591-22) , Knut and Alice Wallenberg (KAW) project "Atomistic design of new catalysts" (Project No. KAW2015.0058) , the Swedish Research Council (Project No. 2018-03434) , the Swedish Foundation for Strategic Research (Project No. ITM17-0045) ,the Forsk Foundation, and the Crafoord Foundation. This research used resources of the 23-ID-2 (IOS) beamline of the National Synchrotron Light Source II , a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory, under Contract No. DE-SC0012704. Part of these experiments were performed at Circe beamline at ALBA Synchrotron with the collaboration of ALBA staff . Open Access funding is provided by the University of the Basque Country. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Chemical Society | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/PID2020-116093RB-C44 | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/PID2019-107338RB-C6-3 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | carbon monoxide | es_ES |
dc.subject | surface oxide | es_ES |
dc.subject | catalytic oxidation | es_ES |
dc.subject | adsorption sites | es_ES |
dc.subject | in-situ | es_ES |
dc.subject | RH(111) | es_ES |
dc.subject | nanoparticles | es_ES |
dc.subject | phases | es_ES |
dc.subject | oxygen | es_ES |
dc.title | Structure Matters: Asymmetric CO Oxidation at Rh Steps with Different Atomic Packing | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2022 The Authors. Published by American Chemical Society. Attribution 4.0 International (CC BY 4.0). | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://pubs.acs.org/doi/10.1021/jacs.2c06733 | es_ES |
dc.identifier.doi | 10.1021/jacs.2c06733 | |
dc.departamentoes | Física aplicada I | es_ES |
dc.departamentoeu | Fisika aplikatua I | es_ES |