Revealing the Catalytic Role of Sn Dopant in CO2‐Oxidative Dehydrogenation of Propane over Pt/Sn‐CeO2 Catalyst

Abstract CO 2 ‐oxidative dehydrogenation of propane (CO 2 ‐ODHP) provides a promising route for propylene production. Sufficient propane conversion and propylene selectivity remain a great challenge due to the difficulty in activating inert propane and CO 2 simultaneously. Herein, a Sn doped CeO 2 supported Pt (Pt/Sn‐CeO 2 ) catalyst in CO 2 ‐ODHP reaction is reported. Sn doping appears to kill two birds with one stone for propane and CO 2 activation. On the one side, it increases the electron density of Pt species via PtSn alloy formation, promoting propane adsorption and C−H bond cleavage. On the other side, it enhances oxygen vacancy concentrations of CeO 2 support, facilitating CO 2 dissociation. A higher propylene selectivity (63.9 % vs 22.3 %) was obtained on 0.1 wt % Pt/1.0 wt % Sn‐CeO 2 than that on 0.1 wt % Pt/CeO 2 with a comparable propane conversion (15.1 % vs 14.3 %) at 550 °C after 240 min on stream. This work provides a reference for designing efficient catalysts.