1. Chimet S.p.A - Catalyst Division, Via di Pescaiola 74, I-52041 Viciomaggio (Arezzo), Italy
2. Consultant, Via Firenze 43, 20010 Canegrate (Milano), Italy
3. Department of Inorganic, Physical and Materials Chemistry, NIS Centre of Excellence and INSTM Reference Center, University of Turin, Via P. Giuria 7, I-10125 Torino, Italy
4. Ecole Polytechnique Fédérale de Lausanne (EPFL), GGRC-ISIC, Station 6, CH-1015 Lausanne, Switzerland