Fig. 4: The activation of the primary O-H and C-H bonds.

In situ FT-IR spectra after the adsorption of 1-propanol for 30 min followed by desorption at desorption times of 1, 5, 10, 15, and 20 min (from top to bottom) on 0.9%Pt1+Ptn/Cu-CuZrOx (a), 0.9%Ptn/Cu-CuZrOx (b), 0.9%PtCu-CuZrOx (c), and 0.5%Pt1/Cu-CuZrOx (d). The simulated adsorption models are displayed corresponding to the absorption band labeled in the same color.