Authors:
E. Horváth University of Veszprém tH-8201 Veszprém, P.O.Box Department of Environmental Engineering and Chemical Technology 158 Hungary 158 Hungary

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J. Kristóf University of Veszprém Department of Analytical Chemistry H-8201 Veszprém, P.O.Box 158 Hungary H-8201 Veszprém, P.O.Box 158 Hungary

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R. Frost Queensland University of Technology School of Physical and Chemical Sciences 2 George Street, GPO Box 2434 Brisbane Queensland 4001 Australia 2 George Street, GPO Box 2434 Brisbane Queensland 4001 Australia

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N. Heider University of Veszprém Department of Analytical Chemistry H-8201 Veszprém, P.O.Box 158 Hungary H-8201 Veszprém, P.O.Box 158 Hungary

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V. Vágvölgyi University of Veszprém Department of Analytical Chemistry H-8201 Veszprém, P.O.Box 158 Hungary H-8201 Veszprém, P.O.Box 158 Hungary

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Abstract  

The formation mechanism of thermally prepared IrO2/SnO2 thin films has been investigated under in situ conditions by thermogravimetry combined with mass spectrometry (TG-MS) and infrared emission spectroscopy (IRES). Mixtures of varying composition of the precursor salts (SnCl22H2O dissolved in ethanol and IrCl33H2O dissolved in isopropanol) were prepared onto titanium metal supports. Then the solvent was evaporated and the gel-like films were heated in an atmosphere containing 20% O2 and 80% Ar to 600C. The thermogravimetric curves showed that the evolution of the oxide phases take place in several decomposition stages and the final mixed oxide film is formed between 490 and 550C, depending on the noble metal content. Mass spectrometric ion intensity curves revealed that below 200C crystallization water, residual solvent, and hydrogen-chloride (formed as a result of an intramolecular hydrolysis) are liberated. The decomposition of surface species (surface carbonates, carbonyls and carboxylates) formed via the interaction of the residual solvent with the precursor salts takes place up to 450C as evidenced by emission Fourier transform infrared spectrometry.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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