Laser synthesis of uncapped palladium nanocatalysts
| Autor: | Brian R. Clark, James K. Ferri, Katharine Moore Tibbetts, Amazin Bullock, B. Frank Gupton, Laysa M. Frias Batista, Mallory G. John, Karli Kunzler |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Potassium Population General Physics and Astronomy chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Chloride Catalysis Sodium borohydride chemistry.chemical_compound medicine education education.field_of_study Surfaces and Interfaces General Chemistry Nanoflower 021001 nanoscience & nanotechnology Condensed Matter Physics Nanomaterial-based catalyst 0104 chemical sciences Surfaces Coatings and Films chemistry Chemical engineering 0210 nano-technology medicine.drug Palladium |
| Zdroj: | Applied Surface Science. 557:149811 |
| ISSN: | 0169-4332 |
| Popis: | We report the synthesis of uncapped ‘naked’ palladium nanoparticles (PdNPs) through the facile and green route of femtosecond laser reduction in liquid using two different precursors: potassium tetrachloropalladate (K2PdCl4) and palladium nitrate (Pd(NO3)2). Stabilization of the Pd precursor by lowering the pH enabled the synthesis of PdNPs in the sub-5 nm range. Laser synthesis using both precursors generated ultrasmall spherical NPs with average diameters of 1.2 nm and 3.1 nm for the nitrate and chloride precursors, respectively. An additional population of anisotropic large particles with nanopopcorn and nanoflower morphologies observed in electron microscopy images appears to result from the aggregation of the ultrasmall PdNPs. The PdNPs are efficient catalysts for Suzuki cross-coupling reactions and for the reduction of para-nitrophenol by sodium borohydride in water. The excellent catalytic activity of our laser-generated PdNPs is attributed to the ligand-free structure and small particle sizes generated through laser reduction in liquid. |
| Databáze: | OpenAIRE |
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