1. Competence Centre
for Catalysis, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburgh, 412 96, Sweden
2. Johnson Matthey AB, Västra Frölunda, 421 31, Sweden
3. Johnson Matthey Technology Centre, Blounts Court, Sonning Common, Reading, RG4 9NH, U.K.
4. MAX-IV Laboratory, Lund University, Lund, 221 00, Sweden