Efficient Carbon Dioxide Electrolysis Based on Perovskite Cathode Enhanced with Nickel Nanocatalyst

Sr2Fe1.4Mn0.1Mo0.5O6−δ perovskite cathode for highly efficient CO2 electrolysis

“…Using pure CO 2 , without addition of reducing gas (e.g., H 2 ) or pre-reduction of the electrode, the current density at an applied voltage of 1.5 V is found to increase from 0.47 A cm À2 at 700 C to 1.80 A cm À2 at 850 C. The I-V curves exhibit distinct non-linear behavior. This phenomenon has also been observed in other studies where perovskite-type oxides are used as electrodes for CO 2 or H 2 O electrolysis, without premixing of the feed gases with CO or H 2 , 7,9,10,[43][44][45] and which is in contrast to the linear I-V curves observed when Ni-YSZ based cathodes are used.…”

Electrical reduction of perovskite electrodes for accelerating exsolution of nanoparticles

“…Recently, exsolution of metal nanocatalysts from perovskite oxides at elevated temperature in reducing conditions has generated considerable research interest as a promising approach to produce perovskite materials with high catalytic properties [1][2][3][4][5][6][7].…”

Nanoparticle Ex-solution for Supported Catalysts: Materials Design, Mechanism and Future Perspectives

“…However, so far, it has been mainly applied to the electrodes of high-temperature electrochemical devices due to their exclusive process conditions. For example, many researchers have utilized the ex-solution process to develop highly active and robust anodes for fuel cells operating at high temperatures and in reductive atmospheres (H 2 or C n H 2 n +2 ), representing a favorable condition for the ex-solution process. − Furthermore, the electrode combined with the ex-solution process has been employed in high-temperature electrolyzing systems such as those associated with CO 2 , − steam, ,, electrolysis, and electrochemical gas reforming . More specifically, effective promotion of electrochemical oxidation of H 2 through metal alloy nanoparticles was reported by Zhu et al , while greatly enhanced steam electrolysis was showcased by Tsekoras et al In addition to such applications, very recently, the ex-solution process has not only become actively employed as oxygen permeation membranes , and chemical looping materials − but has also been used in low-temperature reactions such as those in the CO oxidation. − Moreover, ex-solved catalysts even expand their application to aqueous solution electrolysis reactions such as nanoscale Ni ex-solution from CaTiO 3 , to toxic gas sensing materials using Ir nanoparticles socketed on WO 3 , and to photocatalytic conversion processes. , …”