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Investigation of IrO2-SnO2 thin film evolution from acqueous media (Articolo in rivista)
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- Investigation of IrO2-SnO2 thin film evolution from acqueous media (Articolo in rivista) (literal)
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- 2006-01-01T00:00:00+01:00 (literal)
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- 10.1016/j.apsusc.2006.01.063 (literal)
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L. Vázquez-Gómez (a); E. Horváth (b); J. Kristóf (c); Á. Rédey (b); A. De Battisti (a) (2006)
Investigation of IrO2-SnO2 thin film evolution from acqueous media
in Applied surface science; ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
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- L. Vázquez-Gómez (a); E. Horváth (b); J. Kristóf (c); Á. Rédey (b); A. De Battisti (a) (literal)
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- a Department of Chemistry, University of Ferrara, Via L. Borsari 46, I-44100 Ferrara, Italy
b University of Veszprem, Department of Environmental Engineering and Chemical Technology, H-8201 Veszprem, P.O. Box 158, Hungary
c University of Veszprem, Department of Analytical Chemistry, H-8201 Veszprem, P.O. Box 158, Hungary (literal)
- Titolo
- Investigation of IrO2-SnO2 thin film evolution from acqueous media (literal)
- Abstract
- The thermal evolution process of IrO2-SnO2/Ti mixed oxide thin films of varying noble metal content has been investigated under in situ
conditions by thermogravimetry-mass spectrometry, Fourier transform infrared emission spectroscopy and cyclic voltammetry. The gel-like films
prepared from aqueous solutions of the precursor salts Sn(OH)2(CH3COO)2?xClx and H2IrCl6 on titanium metal support were heated in an
atmosphere containing 20% O2 and 80% Ar up to 600 8C.
The thermal decomposition reactions practically take place in two separate temperature ranges from ambient to about 250 8C and between 300
and 600 8C. In the low temperature range the liberation of solution components and - to a limited extent - an oxidative cracking reaction of the
acetate ligand takes place catalyzed by the noble metal. In the high temperature range the evolution of chlorine as well as the decomposition of
surface species formed (carbonyls, carboxylates, carbonates) can be observed. The acetate ligand shows extreme high stability and is decomposed
in the 400-550 8C range, only.
Since the formation and decomposition of the organic surface species can significantly influence the morphology (and thus the electrochemical
properties) of the films, the complete understanding of the film evolution process is indispensable to optimize the experimental conditions of
electrode preparation.
# 2006 Elsevier B.V. All rights reserved. (literal)
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