Enhancing electrocatalytic reforming of CO2/CH4 with in situ exsolved metal-oxide interfaces in a solid oxide electrolysis cell

Solid oxide electrolysis cells (SOECs) can convert the electric energy into chemical energy, which is convenient for energy storage and transportation. Meanwhile, it can reduce the CO2 and CH(4 )in the atmosphere, thus reduce the greenhouse effect. In this paper, we demonstrate the high-efficiency electrochemical reforming of CO2/CH(4 )into syngas (CO and H-2) in a SOEC in which we in situ construct active metal-oxide interface in perovskite cathodes to improve the coking resistance and catalyst stability. XRD, XPS, SEM and TEM analysis together confirm that the exsolution of metal-oxide interfaces on the surface of LSCM creates the active electrochemical interface to enhance the activity as well as the stability with the durable operation of CO2 and CH4 to syngas for more than 70 h and 7 redox cycles. The exsolved metal-oxide interface could also be applied for other metal -oxide catalyst for improving catalytic activity and stability.

Automated summary

In this study, high-efficiency electrochemical reforming of CO2 and CH4 into syngas was achieved by constructing metal-oxide interfaces in solid oxide electrolysis cells (SOECs). The exsolved metal-oxide interfaces demonstrated improved activity and stability, enabling the conversion of CO2 and CH4 to syngas for more than 70 hours and 7 redox cycles.