Preparation and Structural Properties of Bimetallic Noble Metals Nanoparticles in SBA-15 Systems
| Autor: | M. Zienkiewicz-Strzałka, S. Pikus |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Adsorption Science & Technology, Vol 33 (2015) |
| Druh dokumentu: | article |
| ISSN: | 0263-6174 2048-4038 |
| DOI: | 10.1260/0263-6174.33.6-8.723 |
| Popis: | New noble bimetallic materials composed of platinum/silver, platinum/palladium and palladium/silver arrangements of nanoparticles supported on mesoporous ordered silica support were obtained and characterized. Ammine complexes of noble metals ([Pt(NH 3 ) 4 ]Cl 2 ), [Ag(NH 3 ) 2 ]OH and ([Pd(NH 3 ) 4 ]Cl 2 )) were used as nanoparticles sources. The selected ammine complexes of noble metals were proven to be an easy solution for obtaining good quality materials in comparison with other sources. Bimetallic materials were synthesized by traditional impregnation technique, making the proposed procedure simple and reproducible. Our studies demonstrated that there are significant differences between types of materials and thermal stability of their metal precursor and their decomposition mechanisms. The X-ray diffraction results showed that the obtained metal crystallites exhibited different sizes depending on the kind of noble metal, as indicated by significant differences in intensity and width of diffraction profiles for metal phases. Such difference in sizes of individual components causes different kinds of interaction between metal nanoparticle and solid support. The binding energy of reactants depends on the particle size. This difference was characterized by X-ray photoelectron spectroscopy measurements. The obtained materials were characterized by various techniques suitable for surface characterization with particular emphasis on high-resolution transmission electron microscopy. |
| Databáze: | Directory of Open Access Journals |
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