Composite cathode based on Ni-loaded La0.75Sr0.25Cr0.5Mn0.5O3−δ for direct steam electrolysis in an oxide-ion-conducting solid oxide electrolyzer

A composite cathode based on scandium-doped chromate for direct high-temperature steam electrolysis in a symmetric solid oxide electrolyzer

“…6(a) shows the dependence of mixed conductivity of LSCM on temperature from 300 to 700 C in different atmospheres. The mixed conductivity demonstrates a positive temperature coefficient and finally reaches 5.32 S cm À1 in air while the mixed conductivity of LSCM reported in a previous work is 9.83 S cm À1 under the same condition [3]. Different relative densities of sintered samples probably lead to the difference of the tested mixed conductivity.…”

Enhancing CO2 electrolysis through synergistic control of non-stoichiometry and doping to tune cathode surface structures

“…However, long-term stability of nanocatalysts at high operating temperature remains a major challenge15 due to particle agglomeration leading to performance degradation1617. An alternative method is to incorporate the metal element as a dopant within the host lattice during the synthesis of the catalyst in air, which is then exsolved at the surface in the form of catalytically active metallic nanoparticles under reducing conditions.…”

In situ Growth of NixCu1-x Alloy Nanocatalysts on Redox-reversible Rutile (Nb,Ti)O4 Towards High-Temperature Carbon Dioxide Electrolysis

“…However, control of the morphology of such catalysts on the substrate is difficult, and operation over a long period of time would risk catalyst agglomeration and, therefore, performance degradation. As documented in our previous work162324, steam electrolysis based on Ni- or Fe-impregnated LSCM or LSTO is stable during the first hour of operation at a load of 1.5–2 V, whereas an approximately 20–30% degradation in cell performance is observed when the operating time exceeds 5 h because of the agglomeration of metal nanoparticles on the surface of the composite cathode skeleton.…”