Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HL: Fachverband Halbleiterphysik

HL 36: Poster Ib

HL 36.15: Poster

Dienstag, 8. März 2016, 15:00–19:00, Poster A

Investigation of Prussian blue type redox catalysts for artificial photosynthesis — •Franziska Simone Hegner, Núria López, and José-Ramon Galán-Mascarós — Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain)

The development of an efficient, cheap and robust water-splitting catalyst remains the bottleneck step to realizing artificial photosynthesis. Materials based on Prussian blue (iron(III)hexacyanoferrate(II)), which fulfill all those criteria, have shown high catalytic activities with exceeding long-term stabilities. Notwithstanding, the detailed catalytic mechanisms remain unclear. Combining experimental methods with theoretical calculations we shed light on the underlying physics of Prussian blue and its derivatives

Catalytic systems were prepared by coating oxide semiconductors with Co[Fe(CN)6], which has shown to be the highest efficient water-oxidation catalyst. Their electrochemical behaviour and the oxygen evolution were studied under light conditions.

Due to their mixed-valence character, multiple spin configurations and various charge transfer states, Prussian blue and its analogues exhibit a high degree of complexity, which challenges theoretical calculations. We developed a computational approach to investigate these systems. Moreover, we found out new insights about the electronic and magnetic structure.