Transformation of a Pt-CeO2 Mechanical Mixture of Pulsed-Laser-Ablated Nanoparticles to a Highly Active Catalyst for Carbon Monoxide Oxidation.

Autor:	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.
Předmět:	OXIDATION of carbon monoxide CERIUM oxides PULSED lasers LASER ablation NANOPARTICLES
Zdroj:	ChemCatChem; 5/24/2018, Vol. 10 Issue 10, p2232-2247, 16p
Abstrakt:	The pulsed laser ablation (PLA) in alcohol and water media was employed to prepare Pt and CeO2 PLA-nanoparticles of different sizes and degrees of defectiveness. Interactions of metallic platinum and ceria particles were studied using the thermal activation of Pt-CeO2 mechanical mixtures in the CO+ O2 reaction medium or O2 atmosphere. The thermal activation resulted in oxidized Pt2+/Pt4+ states of platinum in the surface solid solutions PtCeOx and/or PtOx clusters. Catalysts formed after calcination of the PLA-ablated Pt-CeO2 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-CeO2 mechanical mixture. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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