1. CenTACat, School
of Chemistry and Chemical Engineering, Queen’s University Belfast, David
Keir Building, Stranmillis Road, Belfast BT9 5AG, U.K.
2. Robinson Brothers, Ltd., Phoenix
Street, West Bromwich B70
0AH, U.K.
3. Johnson Matthey Catalysts, PO Box 1, Belasis Avenue, Billingham, TS23 1LB, U.K.