dc.contributor.author | García Martínez, Fernando | |
dc.contributor.author | Turco, Elia | |
dc.contributor.author | Schiller, Frederik | |
dc.contributor.author | Ortega Conejero, José Enrique ![ORCID](/themes/Mirage2//images/orcid_16x16.png) | |
dc.date.accessioned | 2024-05-17T17:21:08Z | |
dc.date.available | 2024-05-17T17:21:08Z | |
dc.date.issued | 2024-04 | |
dc.identifier.citation | ACS Catalysis 14(8) : 6319-6327 (2024) | es_ES |
dc.identifier.issn | 2155-5435 | |
dc.identifier.uri | http://hdl.handle.net/10810/68020 | |
dc.description.abstract | We investigate the chemical interaction of carbon monoxide (CO) and oxygen (O2) with kink atoms on steps of platinum crystal surfaces using a specially designed Pt curved sample. We aim at describing the fundamental stages of the CO oxidation reaction, i.e., CO-covered/poisoned stage and O-covered/active stage, at the poorly known kinked Pt facets by probing CO uptake/saturation and O2 saturation, respectively. Based on the systematic analysis that the curved surface allows, and using high-resolution X-ray photoemission, a diversity of terrace and step/kink species are straightforwardly identified and accurately quantified, defining a smooth structural and chemical variation across different crystal planes. In the CO-saturated case, we observe a preferential adsorption at step edges, where the CO coverage reaches a CO molecule per step Pt atom, significantly higher than their close-packed analogous steps with straight terrace termination. For the O-saturated surface, a significantly higher O coverage is observed in kinked planes compared to the Pt(111) surface. While the strong adsorption of CO at the kinked edges points toward a higher ignition temperature of the CO oxidation at kinks as compared to terraces, the large O coverage at steps may lead to an increased reactivity of kinked surfaces during the active stage of the CO oxidation. | es_ES |
dc.description.sponsorship | We acknowledge financial support from grants PID2020-116093RB-C44 and PID2019-107338RB-C6-3, funded by the Spanish MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”, the Basque Government (Grant IT-1591-22), and the Diputación Foral de Gipuzkoa (Gipuzkoa Next program). We acknowledge Elettra Sincrotrone Trieste for providing access to its synchrotron radiation facilities, and we thank E. Tosi and P. Lacovig for assistance in using beamline SuperESCA. The research leading to this result has been supported by the project CALIPSOplus under grant agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020. Open Access funding provided by University of Basque Country. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | ACS | es_ES |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/730872 | 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 | CO adsorption | es_ES |
dc.subject | O2 adsorption | es_ES |
dc.subject | platinum | es_ES |
dc.subject | curved crystal | es_ES |
dc.subject | kinked surface | es_ES |
dc.subject | X-ray photoemission | es_ES |
dc.subject | spectroscopy | es_ES |
dc.title | CO and O2 interaction with kinked Pt surfaces | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2024 The Authors. Published by American Chemical Society. This publication is licensed under
CC-BY 4.0. | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://pubs.acs.org/doi/10.1021/acscatal.4c00435 | es_ES |
dc.identifier.doi | 10.1021/acscatal.4c00435 | |
dc.departamentoes | Física aplicada I | es_ES |
dc.departamentoeu | Fisika aplikatua I | es_ES |