1. Inorganic Chemistry and Catalysis Debye Institute for Nanomaterials Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
2. Institute for X-ray Physics University of Göttingen Friedrich-Hund-Platz 1 37077 Göttingen Germany
3. Deutsches Elektronen-Synchrotron DESY Notkestrasse 85 22607 Hamburg Germany
4. Albemarle Catalysts Company BV Research Center Amsterdam PO box 37650 1030 BE Amsterdam The Netherlands