Study of Pd-In interaction during Pd deposition on pyrolytically prepared In 2 O 3
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SKALA, 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
Volumul 205 / 2002 / ISSN 0169-4332

Study of Pd-In interaction during Pd deposition on pyrolytically prepared In 2 O 3
DOI:https://doi.org/10.1016/S0169-4332(02)01060-7

Pag. 196-205

Skala Tomas1, Veltruska Katerina1, Moroseac Mihail1, Matolinova Iva1, Korotchenkov Ghenadii2, Matolin Vladimir1
 
1 Charles University, Prague,
2 Technical University of Moldova
 
 
Disponibil în IBN: 13 iulie 2023
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
Cuvinte-cheie
alloys, In 2 O 3, ISS, Pd, Sensors, XPS

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