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Electroassisted Propane Dehydrogenation at Low Temperatures: Far beyond the Equilibrium Limitation

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journal contribution
posted on 31.08.2021, 20:45 authored by Jianshuo Zhang, Ruoyun Ma, Hyungwon Ham, Ken-ichi Shimizu, Shinya Furukawa
Propylene production by propane dehydrogenation (PDH) generally requires high temperatures due to thermodynamic equilibrium limitations. This study developed a novel type of catalytic system for low-temperature PDH by combining a surface protonics methodology with intermetallic active sites. By application of an electric current, the intermetallic Pt–In/TiO2 catalyst gave a propylene yield of 10.2% with high selectivity, even at 250 °C, where the thermodynamic equilibrium yield was only 0.15%. Electroassisted proton collisions with propane allowed an unusual reaction pathway for low-temperature PDH. Alloying of Pt with In drastically enhanced the activity and selectivity due to the increased electron density of Pt.