from first principles PP-I-1

OY-V-2Ultrasonically Designed Metal / Polypyrrole Composite Catalysts for FuelCellsCherepanov P.V. 1 , Skorb E.V. 2 , Andreeva D.V. 11 University of Bayreuth, Bayreuth, Germany2 Max Plank Institute of Colloids and Interfaces, Potsdam, Germanypavel.cherepanov@uni-bayreuth.deThe electrocatalytic properties of mesoporous metal / polypyrrole composite materials couldbe used for conversion of chemical energy of fuel into electricity by electrochemicalreactions. Here we report on design and properties of mesoporous metal / polypyrrole catalystprepared by using ultrasound. As a starting material for the preparation of catalytic systems –aluminum / cobalt and aluminum / cobalt / iron alloys were chosen. All systems underinvestigation were sonochemically activated with the use of intensive acoustic cavitation atmesoscopic level. The catalyst design was completed by sonochemical or electrochemicaldeposition of conductive polymer such as polypyrrole. Ultrasound technique is a key tool forcatalyst preparation. Mesoscopical catalyst activation results in formation of porous metalswith high surface area, direct grafting of a polymer. Thus, we can achieve stable, selective,and reusable mesoporous composite materials for further electrocatalytic applications.Morphology of the prepared samples was studied with help of scanning electron microscopy(SEM) as well as X-ray scattering technique (XRD). The electrocatalytic activity of the aspreparedmesoporous systems was investigated by cyclic voltammetry (CV) and byelectrochemical impedance spectroscopy (EIS) technique.110