1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, bus 2450, 3001 Leuven, Belgium
2. Umicore Group R & D, Watertorenstraat 33, 2250 Olen, Belgium
3. Department of Chemical Engineering, KU Leuven, Willem de Croylaan 46, bus 2423, 3001 Leuven, Belgium
4. Laboratory for Chemical Technology, Ghent University, Technologiepark 914, B-9052 Ghent, Belgium
5. Umicore Precious Metals Refining, A. Greinerstraat 14, 2660 Hoboken, Belgium