1. CoorsTek Membrane Sciences AS, 0349 Oslo, Norway.
2. Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo, 0316 Oslo, Norway.
3. Department of Sustainable Energy Technology, SINTEF Industry, 0314 Oslo, Norway.
4. Instituto de Tecnologia Química, Consejo Superior de Investigaciones Científicas-Universitat Politècnica de València, 46022 Valencia, Spain.