1. Institute of Surface Chemistry and CatalysisUlm University Albert-Einstein-Allee 47 D-89081 Ulm Germany
2. ZSW – Centre for Solar Energy and Hydrogen Research Baden-Württemberg Helmholtzstr. 8 D-89081 Ulm Germany
3. Helmholtz-Institute-Ulm (HIU) Electrochemical Energy Storage Helmholtzstr. 11 D-89081 Ulm Germany
4. Karlsruhe Institute of Technology (KIT), P.O. Box 3640 D-76021 Karlsruhe Germany