469263 Effect of Lanthanum Doping and Chlorine Addition on Strontium Titanate Perovskites for Electrocatalytically-Assisted Oxidative Dehydrogenation of Ethane
In this study, strontium titanate type of perovskites were tested as anode catalysts for electro ODH reaction. La-doped strontium titanates were synthesized via modified Pechini route. The effect of lanthanum doping and chlorine incorporation on these catalysts was investigated. The characteristics of the catalysts were investigated using N2 physisorption, ambient and in-situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), diffuse reflectance infrared spectroscopy (DRIFTS), and electronic conductivity measurements. Besides Electro-ODH experiments to test the activities, impedance measurements were also taken using to better understand the cell characteristics and resistances. Oxygen flux measurements were also performed.
Electro-ODH tests on the cell with La0.2Sr0.8TiO3±δClσ anode showed that ethane conversion and ethylene production rates increase with increasing current. Hydrogen production rates were also observed to be very low, indicating oxidative dehydrogenation is taking place. It was also observed that Cl addition increases the ethylene selectivity and La doping increases the conductivity of strontium titanate.
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