Therefore, isomerization is required prior to type-A β-scissions, which was known to be favored by high free alkene concentration. The weak dehydrogenation ability is caused by the low metal loading (0.07 M/nm 2 ), and one should be able to alleviate the problem and shift the selectivity towards higher-valued heavier products by increasing the metal loading. In Figure , Pt/TiO2-A-SG yields less C3-6 than Ni/TiO2-A-SG despite higher PP conversion, confirming that enhancing the dehydrogenation ability suppresses the formation of these light products.