Yan et al. report a catalytic system comprising alumina-supported Pt nanoclusters (Pt/Al2O3) for propane dehydrogenation and In2O3 for selective H2 combustion (see the figure). To rationally coordinate sequential reactions, Pt/Al2O3 is overcoated by In2O3 films by using an atomic layer deposition (ALD) process. The coating becomes porous, with the pore size of about 1.4 nm, upon thermal treatment. This leads to the exposure of approximately half of the surface Pt atoms for the access of gaseous molecules. A bonus of this structure is that the porous In2O3 films could prevent the aggregation of Pt particles at high temperatures.