Rapid Synthesis of Rhodium–Palladium Alloy Nanocatalysts
| Autor: | Pranaw Kunal, Graeme Henkelman, Simon M. Humphrey, Graham W. Piburn, Hao Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Alkene Organic Chemistry Inorganic chemistry Binding energy Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Catalysis Nanomaterial-based catalyst 0104 chemical sciences Rhodium Inorganic Chemistry chemistry Density functional theory Physical and Theoretical Chemistry 0210 nano-technology Palladium |
| Zdroj: | ChemCatChem. 10:329-333 |
| ISSN: | 1867-3899 1867-3880 |
| DOI: | 10.1002/cctc.201701133 |
| Popis: | The chemistry of metastable RhPd alloys is not well understood, and well-characterized nanoparticle (NP) examples remain rare. Well-defined and near-monodisperse RhPd NPs were prepared in a simple one-pot approach by using microwave-assisted or conventional heating in reaction times as short as 30 s. The catalytic hydrogenation activity of supported RhPd NP catalysts revealed that short synthesis times resulted in the most-active and most-stable hydrogenation catalysts, whereas longer synthesis times promoted partial Rh-Pd core–shell segregation. Relative to Rh NPs, RhPd NPs resisted deactivation over longer reaction times. Density functional theory (DFT) was employed to estimate the binding energies of H and alkenes on (1 1 1) Rh, Pd, and Rh0.5Pd0.5 surfaces. The DFT results concurred with experiment and concluded that the alkene hydrogenation activity trend was of the order Pd |
| Databáze: | OpenAIRE |
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