| Conţinutul numărului revistei |
| Articolul precedent |
| Articolul urmator |
 191 0 |
 SM ISO690:2012SKALA, Tomas, VELTRUSKA, Katerina, MOROSEAC, Mihail, MATOLINOVA, Iva, KOROTCHENKOV, Ghenadii, MATOLIN, Vladimir. Study of Pd-In interaction during Pd deposition on pyrolytically prepared In 2 O 3. In: Applied Surface Science, 2002, vol. 205, pp. 196-205. ISSN 0169-4332. DOI: https://doi.org/10.1016/S0169-4332(02)01060-7 |
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  Applied Surface Science |
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| Volumul 205 / 2002 / ISSN 0169-4332 | ||||||
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| DOI:https://doi.org/10.1016/S0169-4332(02)01060-7 | ||||||
| Pag. 196-205 | ||||||
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| Rezumat | ||||||
In 2 O 3 belongs to the group of metal oxides used successfully for gas detection, with sensitivity for CO and H 2 comparable with that of SnO 2 and excellent for O 3 . The sensing properties of these sensors could be greatly improved by adding small amount of transition metals such as Pd, Pt, Au, etc. In this work, we used X-ray photoelectron spectroscopy (XPS) and ion scattering spectroscopy (ISS) to study the growth of Pd particles on In 2 O 3 substrates prepared by spray pyrolysis method. Surface stoichiometry and its changes during Ar + ion bombardment used for surface cleaning were checked with XPS and ISS. The Pd growth was studied stepwise in situ using the micro-electron beam evaporation source (MEBES) with controlled evaporation rate. XPS and ISS measurements were carried out with special attention to metal-substrate interaction (MSI), which was observed for Pd-In and resulted in the formation of Pd-In alloy with noble metal-like electronic structure. Further, we studied reduction of these samples after oxidation in air. A lower reduction temperature than with bulk PdO was observed. The results are compared with the experiment of Pd deposition performed on a pure In foil |
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| Cuvinte-cheie alloys, In 2 O 3, ISS, Pd, Sensors, XPS |
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