Durable Oxide-Based Catalysts for Application as Cathode Materials in Polymer Electrolyte Fuel Cells (PEFCs)

Abstract

The goal of this work is the development of new oxide based highly active model catalysts for the oxygen reduction reaction in PEFCs. In this work, a description for the preparation of SnO 2 thin films by reactive magnetron sputtering is given. The films are characterized using x-ray diffraction, x-ray photoelectron spectroscopy and electrochemical measurements. Composition and high potential stability of the SnO 2 films was proven before its use as substrates for Pt model electrodes. Oxygen reduction kinetics on Pt/SnO 2 demonstrates similar activities as compared to typical carbon based systems, an important prerequisite for further studies and development of SnO 2 based electrocatalysts.