Abstract
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.
Original language | English |
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Pages (from-to) | 2232-2247 |
Number of pages | 16 |
Journal | ChemCatChem |
Volume | 10 |
Issue number | 10 |
DOIs | |
Publication status | Published - 24 May 2018 |
Keywords
- Cerium
- Laser chemistry
- Nanoparticles
- Oxidation
- Platinum
- cerium
- GAS-SHIFT REACTION
- oxidation
- PT/CEO2 CATALYSTS
- PREFERENTIAL OXIDATION
- platinum
- nanoparticles
- METAL-SUPPORT INTERACTIONS
- PLATINUM NANOPARTICLES
- laser chemistry
- TEMPERATURE CO OXIDATION
- CERIA CATALYSTS
- PROGRESSIVE OXIDATION
- IN-SITU
- CHEMICAL-PROPERTIES