Influence of the thickness of sputter-deposited platinum films on the electrochemical promotion of propane combustion |
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Authors: | A Billard P Vernoux |
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Institution: | (1) Laboratorie de Science et Génie des Surfaces (UMR 7570), Ecole des Mines – Parc de Saurupt, F 54042 Nancy cedex;(2) Laboratoire d'Application de la Chimie à l'Environnement (UMR 5634) CNRS, Université Claude Bernard-Lyon 1, F 69622 Lyon cedex |
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Abstract: | 8 to 120 nm-thick Pt coatings were sputter-deposited on Yttria-Stabilised Zirconia (YSZ) membranes, 17 mm in diameter, by
magnetron sputtering of a Pt target at low pressure (0.3 Pa). The catalytic activity of propane combustion under open-circuit
conditions is first measured near to the stoichiometry (0.2%C3H8/1%O2) and shows that the coatings present a rather high catalytic activity. Close-circuit measurements were finally performed
at 337 °C and 400 °C. They show that rather high faradaic efficiencies in the range 106 can be reached as soon as the Pt film is thick enough to allow a bias of its whole area.
Paper presented at the Patras Conference on Solid State Ionics — Transport Properties, Patras, Greece, Sept. 14 – 18, 2004. |
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