1. Electrochemistry Laboratory; Paul Scherrer Institut; Forshungsstrasse 111 5232 Villigen PSI Switzerland
2. Laboratory for High Performance Ceramics; EMPA; Swiss Federal Laboratories for Materials Testing and Research; 8600 Dübendorf Switzerland
3. Department of Energy Conversion and Storage; Technical University of Denmark; DK-2800 Kgs. Lyngby Denmark
4. Proton Energy Systems; 10 Technology Drive Wallingford CT 06492 USA
5. Theory and Simulation of Materials (THEOS), and National Centre for Computational Design and Discovery of Novel Materials (MARVEL); EPFL; 1015 Lausanne Switzerland
6. Laboratory of Physical Chemistry; ETH Zurich; 8093 Zurich Switzerland