Author, as appears in the article.: Pinos-Vélez V; Osegueda O; Crivoi DG; Llorca J; García-García FJ; Álvarez MG; Medina F; Dafinov A
Department: Enginyeria Química
URV's Author/s: CRIVOI, DANA GEORGIANA / Dafinov, Anton Ivanov / GARCÍA ALVAREZ, MAYRA / Medina Cabello, Francisco / OSEGUEDA CHICAS, ÓSCAR ANTONIO
Keywords: X-ray-diffraction thermodynamics size pd nanoparticles nanocrystals hysteresis hydrogen-peroxide hydride formation decomposition absorption
Abstract: A key step in creating efficient and long-lasting catalysts is understanding their deactivation mechanism(s). On this basis, the behavior of a series of Pd/corundum materials during several hydrogen adsorption/desorption cycles was studied using temperature-programmed desorption coupled with mass spectrometry and aberration-corrected transmission electron microscopy. The materials, prepared by impregnation and by sputtering, presented uniform well-dispersed Pd nanoparticles. In addition, single atoms and small clusters of Pd were only detected in the materials prepared by impregnation. Upon exposure to hydrogen, the Pd nanoparticles smaller than 2 nm and the single atoms did not present any change, while the larger ones presented a core-shell morphology, where the core was Pd and the shell was PdHx. The results suggest that the long-term activity of the materials prepared by impregnation can be attributed solely to the presence of small clusters and single atoms of Pd.
Thematic Areas: Química Medicina ii Materials science, multidisciplinary Materials science Materials chemistry Materiais Interdisciplinar Geociências General chemistry General chemical engineering Farmacia Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas i Ciências ambientais Chemistry, physical Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: francesc.medina@urv.cat anton.dafinov@urv.cat anton.dafinov@urv.cat
Author identifier: 0000-0002-3111-1542 0000-0002-6124-3095 0000-0002-6124-3095
Record's date: 2024-06-22
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://pubs.acs.org/doi/full/10.1021/acs.chemmater.2c01951
Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Chemistry Of Materials. 34 (19): 8760-8768
APA: Pinos-Vélez V; Osegueda O; Crivoi DG; Llorca J; García-García FJ; Álvarez MG; Medina F; Dafinov A (2022). Insights into Palladium Deactivation during Advanced Oxidation Processes. Chemistry Of Materials, 34(19), 8760-8768. DOI: 10.1021/acs.chemmater.2c01951
Article's DOI: 10.1021/acs.chemmater.2c01951
Entity: Universitat Rovira i Virgili
Journal publication year: 2022
Publication Type: Journal Publications
Repositori URV