For the catalytic testing experiments, a continuous flow fixed bed quartz tube reactor in a heated fireclay block was used and the exhaust gases analysed with a calibrated MS OmniStar TM Gas Analysis System from Pfeiffer Vaccum (electron ionisation MS with quadrupole analyser). The temperature was controlled by a thermocouple placed in the quartz tube right above the catalyst bed. Liquid reactants were introduced to the gas phase by flowing Ar through an evaporator. Before all the temperature programmed reaction experiments the samples were oxidatively pretreated by heating the sample in a total flow of 50 mL•min -1 20 vol% O2 in Ar at 400 °C for 30 min at a heating rate of 10 °C•min -1 .