1. Department of Chemical Engineering – Nanomaterials, Catalysis & Electrochemistry, University of Liège, Liège, Belgium
2. Institute of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain, Louvain-la-Neuve, Belgium
3. Institut für Energie- und Umwelttechnik e.V. (IUTA, Institute of Energy- and Environmental Technology), Duisburg, Germany
4. Environmental Department, Celabor, Research Centre, Herve, Belgium