1. Laboratory
of Materials for Energy Conversion, EMPA-Dübendorf, Überlanderstrasse 129, CH-8600 Dübendorf, Switzerland
2. Laboratory
of Inorganic Chemistry, ETH-Zurich, Vladimir-Prelog-Weg 1, CH-8093 Zurich, Switzerland
3. Institute
of Inorganic Chemistry, RWTH-Aachen, Landoltweg 1, D-52074 Aachen, Germany