1. Department of Energy Conversion and Storage, Technical University of Denmark, Lyngby Campus, Anker Engelunds Vej, Building 301, DK-2800 Kgs. Lyngby, Denmark
2. Instituto de Tecnología Química (Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas), Av. Naranjos s/n, E-46022 Valencia, Spain
3. Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, Materials Synthesis and Processing (IEK-1), 52425 Jülich, Germany
4. Linde Inc., 175 East Park Drive, Tonawanda, NY 14150, USA
5. University of Twente, Faculty of Science and Technology, Inorganic Membranes, P. O. Box 217, Enschede 7500 AE, The Netherlands