The synthesized electrodes demonstrated ethylene formation at yields greater than thermal cracking, depending on the current drawn from the cell (Figure ). At 700°C, 1.0 A/cm 2 and 3.43 ± 0.04 mmol/min of ethane, LFO and SFO generated 0.04 and 0.1 mmol/min/cm 2 of ethylene, respectively, while at 0.0 A/cm 2 , LFO and SFO generated 0.01 and 0.02 mmol/min/cm 2 of ethylene, respectively. In addition, in the absence of electrodes, yttria-stabilized zirconia (YSZ) generated 0.01 mmol/min/cm 2 of ethylene. This comparison between LFO, SFO and the electrolyte demonstrated clear differences between thermal and electrocatalytic performances. This difference between the thermal and electrocatalytic route is especially relevant since higher temperatures lead to greater homogeneous ODH and thermal cracking as the dominant mechanism . In prior studies with inherent air-fuel separation via membrane or electrochemical schemes, similar or higher ethylene yield was typically obtained at higher temperatures or longer residence times, indicative of homogeneous influence on ethane conversion as opposed to heterogeneous catalytic/electrocatalytic mechanisms . This becomes apparent in those studies as ethane conversion and ethylene yield would decrease with lower fuel residence time. The reactor configuration used in this study has been constructed to minimize fuel residence time and thus maximize heterogeneous ODH (Figure ). Furthermore in comparison to this current study, other electrogenerative schemes deployed precious metal catalysts with pure oxygen at the cathode , thus eliminating the advantage of inherent air separationa key advantage of oxidative dehydrogenation.