Nature of the Active Sites and Reaction Mechanism during Methanol Steam Reforming over Cu/ZnO: An Isotopic Modulated Excitation Diffuse Reflectance Infrared Fourier Transform Spectroscopy Study

. The interfacial sites play key roles in methoxy dehydrogenation and water dissociation. The results highlight the potential of ME-PSD-DRIFTS to provide a detailed molecular level understanding of the reaction mechanism(s) in the MSR reaction and the dynamics of surface catalytic processes for heterogeneous catalysts in general.