Surface Engineering of Titania Boosts Electroassisted Propane Dehydrogenation at Low Temperature |
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Authors: | Jianshuo Zhang Yuki Nakaya Prof. Dr. Ken-ichi Shimizu Prof. Dr. Shinya Furukawa |
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Affiliation: | Institute for Catalysis, Hokkaido University, N-21, W-10, Sapporo, 001-0021 Japan |
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Abstract: | Electric field catalysis using surface proton conduction, in which proton hopping and collision on the reactant are promoted by external electricity, is a promising approach to break the thermodynamic equilibrium limitation in endothermic propane dehydrogenation (PDH). This study proposes a catalyst design concept for more efficient electroassisted PDH at low temperature. Sm was doped into the anatase TiO2 surface to increase surface proton density by charge compensation. Pt−In alloy was deposited on the Sm-doped TiO2 for more favorable proton collision and selective propylene formation. The catalytic activity in electroassisted PDH drastically increased by doping an appropriate amount of Sm (1 mol % to Ti) where the highest propylene yield of 19.3 % was obtained at 300 °C where the thermodynamic equilibrium yield was only 0.5 %. Results show that surface proton enrichment boosts alkane dehydrogenation at low temperature. |
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Keywords: | Electric Field Equilibrium Limitation Propane Dehydrogenation Surface Doping Surface Protonics |
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