1. Center
for Materials Science and Nanotechnology (SMN), Department of Chemistry, University of Oslo, P.O.
Box 1033, Blindern, N-0315 Oslo, Norway
2. Haldor
Topsøe
A/S, Haldor Topsøes Allé
1, DK-2800 Kgs., Lyngby, Denmark
3. SINTEF Materials
and Chemistry, P.O. Box 124 Blindern, 0314 Oslo, Norway