To enhance the hydrogen release during hydrogen storage

several Pt-Ir supported on Mg-Al mixed oxide catalysts were prepared and then applied into the dehydrogenation of methylcyclohexane (MCH) in this study. The effects of iridium content

reduction temperature on the activity and stability of the catalysts were studied in detail. In the presence of Ir

metal particle size was decreased and electron transfer between Ir and Pt was observed. High reduction temperature increased the metallic Ir content but enlarged the particle size of active sites. During the dehydrogenation reaction on Pt-Ir bimetallic catalyst

MCH was efficiently converted into toluene and PtIr-5/ Mg-Al-275 exhibited the highest activity. After prolonging the residence time and raising the reaction temperature to 350 °C

the conversion and hydrogen evolution rate were increased to 99.9% and 578.7 mmol·(g Pt)

-1

·min

-1

respectively. Moreover

no carbon deposition was observed in the spent catalyst

presenting a high anti-coking ability and good potential for industrial application.