Substitutional–interstitial structural transition in Cu–Pt nano-alloys
| Autor: | J.E. Sanchez, J. Jesus Velazquez-Salazar, Shi-ze Yang, Grégory Guisbiers, Luke D. Geoffrion, Alexander Lehr, Miguel Jose-Yacaman |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Alloy General Engineering Nanoparticle chemistry.chemical_element Bioengineering 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Catalysis Chemical engineering chemistry Nano engineering General Materials Science 0210 nano-technology Platinum Nanoscopic scale Wet chemistry Phase diagram |
| Zdroj: | Nanoscale Advances. 3:3746-3751 |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/d1na00204j |
| Popis: | Copper-platinum alloys are important binary alloys in catalysis. In this communication, we demonstrate that it is possible to preserve the thermal properties of platinum with a copper-platinum alloy by converting the substitutional alloy into an interstitial one. This conversion occurs when the size of the copper-platinum system is reduced down to the nanoscale. The size-dependent phase diagram of Cu-Pt for a spherical nanoparticle is calculated at various sizes (50, 10 and 5 nm) demonstrating that Cu-Pt alloyed nanoparticles can be formed all over the composition range. Experimentally, the electron microscopy characterization of copper-platinum alloyed nanoparticles synthesized by wet chemistry supports the predicted structural transition. |
| Databáze: | OpenAIRE |
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