Berlin 2015 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 40: Solid-Liquid Interfaces

O 40.8: Poster

Dienstag, 17. März 2015, 18:15–21:00, Poster A

Polymeric Phthalocyanine Sheets as Electrocatalytic Electrodes for Water-Splitting-Reactions — •Clemens Geis, Simon Schneider, Frieder Müntze, and Derck Schlettwein — Institute of Applied Physics, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, D-35392 Gießen, Germany

Water splitting is an attractive way to convert alternating renewable energy sources to storable chemical fuels. Efficient electrocatalytic materials from abundant sources are needed for widespread applications. Aside from metals or metal oxides as electrode materials, molecular metal complexes are a promising approach for the oxygen evolution reaction. In this work, phthalocyanine metal complexes (Mn, Fe, Co, Ni, Cu) with polymerized ligands were synthesized via a CVD process on conductive substrates and used as electrocatalysts in an alkaline solution. Cyclic voltammetry with optical absorption spectroscopy performed in operando was applied to characterize the films. Chronoamperometry at positive potentials was used to study the performance of the films as electrocatalysts in the oxygen evolution reaction. Photoelectron spectroscopy was employed to analyze the elemental composition of the films and details of the atomic environment of the metal atoms.