Regensburg 2013 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 15: Poster Session

MM 15.29: Poster

Montag, 11. März 2013, 18:00–20:00, Poster E

High Throughput Preparation and Scanning of a Complex Perovskite Oxide Library for Light-driven Electrocatalysis — •Helge Stein, Andreas Blumenstein, Julius Scholz, Jörg Hoffmann, and Christian Jooss — Institut für Materialphysik, Friedrich-Hund Platz 1 37077 Göttingen, Deutschland

With respect to development of novel materials for sunlight driven photocatalysis, high-throughput preparation and characterization methods are preferable because of the broad chemical search space. We have designed a system for the screening and production of ternary and quaternary oxide compounds in order to find promising compositions which have a well-matched electronic band structure and sufficient complexity to enable a multi-step charge transfer reaction. As a model system we have prepared a multi-component La-Sr-Fe-Co (LSFC) oxide library for testing oxygen evolution under sunlight irradiation. This system is mostly of perovskite type and shows a broad doping ability as well as a complex electronic structure. The samples were deposited on glass using an ink-jet printing technique with nitrate precursors. By post-annealing in air for 4 hours at 480°C Oxide phase formation was performed. Electrocatalytic measurements were made by high throughput cyclic voltametry in darkness and under illumination. The Crystallographic structure and surface morphology of the samples was determined by x-ray and SEM techniques.