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Transformation of a Pt–CeO 2 Mechanical Mixture of Pulsed‐Laser‐Ablated Nanoparticles to a Highly Active Catalyst for Carbon Monoxide Oxidation
Author(s) -
Slavinskaya E. M.,
Stadnichenko A. I.,
Muravyov V. V.,
Kardash T. Y.,
Derevyannikova E. A.,
Zaikovskii V. I.,
Stonkus O. A.,
Lapin I. N.,
Svetlichnyi V. A.,
Boronin A. I.
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201702050
Subject(s) - catalysis , calcination , carbon monoxide , materials science , platinum , nanoparticle , chemical engineering , platinum nanoparticles , laser ablation , inorganic chemistry , nanotechnology , chemistry , laser , organic chemistry , engineering , physics , optics
The pulsed laser ablation (PLA) in alcohol and water media was employed to prepare Pt and CeO 2 PLA‐nanoparticles of different sizes and degrees of defectiveness. Interactions of metallic platinum and ceria particles were studied using the thermal activation of Pt–CeO 2 mechanical mixtures in the CO+O 2 reaction medium or O 2 atmosphere. The thermal activation resulted in oxidized Pt 2+ /Pt 4+ states of platinum in the surface solid solutions PtCeO x and/or PtO x clusters. Catalysts formed after calcination of the PLA‐ablated Pt–CeO 2 mixtures in oxygen at 450–600 °C revealed CO conversion at very low temperatures up to 70 % depending on the conditions of PLA particles preparation and thermal activation of Pt–CeO 2 mechanical mixture.