Characterization of oxide films electrochemically deposited from solutions of palladium chloride and sodium hexachloroiridate

Add time:09/08/2019    Source:sciencedirect.com

Cyclic voltammetry of platinum and glassy carbon electrodes in an acidic mixture containing 1.0 mM PdCl2 and 2.0 mM Na2IrCl6 yields a film of a 0.75 μm film is about 0.2 at.%. The surface concentration of palladium drops to below the detection limit of X-ray photoelectron spectroscopy wh experiments as a function of pH, two linear regions, over the pH ranges 1–5 and 6–10, with respective slopes of 62 mV (pH unit)−1 and 83 mV ( peak potentials vs. pH are commensurate with the potentiometric data. Charge transport coefficients for the oxidation of the film are lower than for th solution the respective values are 5 × 10−9 cm2 s−1 and 8 × 10−9 cm2 s−1.

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