Sr(2)Fe(1.575)Mo(0.5)O(6-δ) Promotes the Conversion of Methane to Ethylene and Ethane

Oxidative coupling of methane can produce various valuable products, such as ethane and ethylene, and solid oxide electrolysis cells (SOECs) can electrolyze CH(4) to produce C(2)H(4) and C(2)H(6). In this work, Sr(2)Fe(1.575)Mo(0.5)O(6-δ) electrode materials were prepared by impregnation and in situ precipitation, and Sr(2)Fe(1.5)Mo(0.5)O(6-δ) was taken as a reference to study the role of metal–oxide interfaces in the catalytic process. When the Fe/Sr(2)Fe(1.575)Mo(0.5)O(6-δ) interface is well constructed, the selectivity for C(2) can reach 78.18% at 850 °C with a potential of 1.2 V, and the conversion rate of CH(4) is 11.61%. These results further prove that a well-constructed metal–oxide interface significantly improves the catalytic activity and facilitates the reaction.