Umicore Ag & Co Kg

Greenerity Gmbh

Heraeus Deutschland Gmbh & Co Kg

Technische Universitat Munchen

Christian Eickes

Sandra Wittpahl

Joachim Koehler

Holger Dziallas

Jens-Peter Suchsland

Alessandro Ghielmi

Matthias Binder

Christian Gebauer

Dominik Gehrig

Thomas Martin

Hubert Gasteiger

Jan Byrknes

Maximilian Bernt

Alexandra Hartig-weiss

Martina Kemmer

A membrane electrode assembly includes a cathode, an anode and a proton-conductive membrane, wherein the cathode includes a first metal-containing catalyst and a proton-conductive ionomer, the anode includes a proton-conductive ionomer, a second metal-containing catalyst that catalyzes the reaction of hydrogen to protons, and a third metal-containing catalyst that catalyzes the reaction of CO to CO, a total mass ratio of platinum of the second catalyst and platinum of the third catalyst to a total mass ratio of metals of the second catalyst and the third catalyst, with the exception of platinum, is greater than 3:1, and the total mass per unit area of platinum of the second catalyst and platinum of the third catalyst is less than 0.4 mg/cm.

Membrane electrode assembly including anode having hydrogen reducion catalyst and carbon monoxide oxidation catalyst and fuel cell

The invention relates to a membrane electrode unit (MEU) for electrochemical apparatuses, in particular for direct methanol fuel cells (DMFC). The membrane electrode unit contains backings (i.e. gas diffusion layers) on the anode side and cathode side, which have a different water tightness (WT). The anode backing must have a lower water tightness (i.e. a higher water permeability) than the cathode backing, where WT&#x3c;WT. The anode backing preferably has no compensating layer (microlayer), has a lower content of water repellent (from 2 to 10 wt.-%, based on the total weight) and has a higher total pore volume (VTot) than the cathode backing. The membrane electrode units produced have a substantially improved performance in DMFC fuel cells which are operated with aqueous methanol solution.

Membrane-electrode unit for direct methanol fuel cells (DMFC)

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Frankfurt am Main, Germany

Christian Eickes