Фізико-хімічні властивості поверхні VPO-каталізаторів, модифікованих йонами перехідних металів
An influence of the modification with the transition metal ions (Me= Ti, Fe, Zr, Мо, La, W, Ag, Ni ) on physical-chemical properties of VPO-composition surface was studied. VPMeO-samples were investigated by the X-ray phase analysis, X-ray photoelectron spectroscopy, differential thermal analysis an...
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| Datum: | 2014 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | Ukrainian |
| Veröffentlicht: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2014
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| Schlagworte: | |
| Online Zugang: | https://www.cpts.com.ua/index.php/cpts/article/view/259 |
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| Назва журналу: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Zusammenfassung: | An influence of the modification with the transition metal ions (Me= Ti, Fe, Zr, Мо, La, W, Ag, Ni ) on physical-chemical properties of VPO-composition surface was studied. VPMeO-samples were investigated by the X-ray phase analysis, X-ray photoelectron spectroscopy, differential thermal analysis and scanning electron microscopy methods. Types of acidic centers were defined by dimethylpyridine and 2,6-dimethylpyridine adsorption. It has been found established that the introduction of the additives and the variation of their concentration (Ме/V=0.05–0.4) in the VPO-matrix do not influences on its composition most has, with the exception of additives Mo, La and Ti. It has been shown that VPO-composition promoted with transitional metal ions modifies its morphology, O1S-electrons binding energy, atomic ratio P/V and the quantity of acidic sites on its surface. It has been found that the change of surface acidic properties of VPMeO-samples by means of additives introduction is characterized by Lewis acidity essentially. |
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