Synthesis of BiRh Nanoplates with Superior Catalytic Performance in the Semihydrogenation of Acetylene
| Autor: | Michael Ruck, Dorin Geiger, Martin Heise, Alexey I. Baranov, Daniel Köhler, Yuan Luo, Marc Armbrüster |
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| Rok vydání: | 2012 |
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| Zdroj: | Chemistry of Materials. 24:1639-1644 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | Highly uniform and well-crystallized nanoparticles of the intermetallic compound BiRh were obtained by low-temperature synthesis at 240 °C using the microwave-assisted polyol process. In this time- and energy-efficient reaction the polyol acts as solvent, reducing agent, and surfactant, while the microwave radiation leads to fast and homogeneous nucleation and crystal growth. Electron microscopy studies confirmed the presence of pseudohexagonal nanoplates with a primary particle diameter of 60 nm and high crystallinity. As indicated by high-resolution transmission electron microscopy, the plate normal is generally not parallel to [001] but coincides with [421]. Powder X-ray diffraction and energy dispersive X-ray spectroscopy revealed the single-phase nature and the equimolar composition. The specific surface area (0.54 m2 g–1) and the particle size distribution were measured by fractional sedimentation. According to the analysis of the chemical bonding by means of quantum chemical calculations, 0.62 elec... |
| Databáze: | OpenAIRE |
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