Authors:
Elizabet Horváth University of Veszprém Department of Environmental Engineering and Chemical Technology Veszprém Hungary 158 8201 Veszprém Hungary 158 8201

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J. Kristóf University of Veszprém Department of Analytical Chemistry Veszprém Hungary 158 8201 Veszprém Hungary 158 8201

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L. Vázquez-Gómez University of Ferrara Department of Chemistry Ferrara Italy 44100 Via L. Borsari 46 Ferrara Italy 44100 Via L. Borsari 46

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Á. Rédey University of Veszprém Department of Environmental Engineering and Chemical Technology Veszprém Hungary 158 8201 Veszprém Hungary 158 8201

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V. Vágvölgyi University of Veszprém Department of Analytical Chemistry Veszprém Hungary 158 8201 Veszprém Hungary 158 8201

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Abstract  

The thermal evolution process of RuO2–IrO2–SnO2 mixed oxide thin films of varying noble metal contents has been investigated under in situ conditions by thermogravimetry-mass spectrometry (TG-MS), infrared emission spectroscopy (IR) and cyclic voltammetry (CV). The gel-like films prepared from aqueous solutions of the precursor compounds RuOHCl3, H2IrCl6 and Sn(OH)2(CH3COO)2–xClx on titanium metal support were heated in an atmosphere containing 20% O2 and 80% Ar up to 600C. Chlorine evolution takes place in a single step between 320 and 500C accompanied with the decomposition of the acetate ligand. The decomposition of surface species formed like carbonyls, carboxylates and carbonates occurs in two stages between 200 and 500C. The temperature of chlorine evolution and that of the final film formation increases with the increase of the iridium content in the films. The anodic peak charge shows a maximum value at 18% iridium content.

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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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