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Thin film vacuum deposition technology has been considered with respect to the production of electrodes for electrochemical gas sensors. Electrodes, employing Pt and Au as catalytic agents, are produced by Magnetron Sputtering (MS) co-deposition of graphite/noble metal. Once inserted in the sensor as working electrodes, the resultant amorphous carbon (a-C)–noble metal nanocomposite layers are shown...