Affiliation: | 1. Center for Atomic‐Scale Materials Design, Department of Physics, Technical University of Denmark, 2800 Kgs. Lyngby (Denmark), Fax: (+45)?4593‐2399;2. Fuel Cells and Solid State Chemistry Department, Risoe National Laboratory for Sustainable Energy, DTU, Frederiksborgvej 399, 4000 Roskilde (Denmark) |