A perovskite infiltrated cathode of metal-supported solid oxide electrolysis cell for CO2 electrolysis

Solid oxide electrolysis cells (SOECs) are regarded as a promising technology to realize carbon neutrality since they can electrochemically convert CO2 to CO. This communication reports a feasible structure of a metal-supported solid oxide electrolysis cell (Ms-SOEC) for CO2 electrolysis, where a porous 430 stainless steel substrate is coated with perovskite oxide La0.6Sr0.4Fe0.9Mo0.1O3-d (LSFM) introduced by the infiltration method. The LSFM catalyst exhibits a uniform distribution and loose accumulation in the porous metal substrate. This Ms-SOEC with a structure of LSFM-430|YSZ|LSCF-SDC shows a current density of 0.90 A cm-2 at 800 degrees C and 1.5 V with an LSFM loading of 6.0 wt%. Meanwhile, a 10-times thermal cycling operation demonstrates good reliability of the configuration. Overall, the metal-based cathode, where 430 stainless steel acts as the mechanical support and infiltrated LSFM perovskite acts as the electrocatalyst for CO2 electrolysis, could be a viable configuration of Ms-SOECs.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.