A low-cost platinum film deposited direct on glass substrate for electrochemical counter electrodes

Journal of Power Sources Volume: 232 Pages: 254-257 Published: 2013

SEM micrographs of A) glass, B) glass sandblasted, C) and D) Pt/Glass. The magnification was 500x for micrographs A), B) and C), and 2500x for D)

Writers: R. Pereira, L.F. Marchesi, R.G. Freitas, R. Matos, E.C. Pereira

Keywords: Platinum electrodes; Solegel route; Low cost deposition; Glass substrate

Abstract: The preparation and characterization of platinum electrodes on glass substrates obtained by the Pechini method for a potential application as a counter electrode is presented in this paper. This method is based on the dissolution of citric acid (CA) and hexachloride platinum acid (H2PtCl6) in ethylene glycol (EG), and then calcinated in an appropriated temperature to produce the desired metallic film. Characterization was carried out by X-ray diffraction, scanning electron and atomic force microscopy and cyclic voltammetry. X-ray patterns of platinum on glass substrate showed the same features of the platinum bulk metal as well as its voltammetric profile. In order to determine the stability of the electrode, the electrode was subjected to 5000 voltammetric cycles and polarized at constant current of 100 mA cm2 for at least 200 h, showing no considerable differences compared with the as synthesized electrode. Moreover, the main advantage of the electrode is the low cost (US$ 0.03 cm2 ) of the prepared samples.

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DOI: 10.1016/j.jpowsour.2013.01.040

Rose Portasio
Sobre Rose Portasio 131 Artigos
Assessora Administrativa no LIEC - IQ/Unesp