Direct carbon dioxide-methane solid oxide fuel cells integrated for high-efficiency power generation with La0.75Sr0.25Cr0.5Fe0.4Ni0.1O3-δ-based dry reforming catalyst

Solid oxide fuel cell (SOFC) can directly convert carbon-based fuels to power with low environmental impact and high energy efficiency, while there is still one of the key challenges that carbon deposition over Ni-based cermet anodes causes serious performance degradation. Herein, a Ni-doped perovskite, La0.75Sr0.25Cr0.5Fe0.4Ni0.1O3-delta (LSCFN), is prepared to design exsolution systems and evaluated as the dry reforming catalyst for direct carbon dioxide-methane SOFCs. It is demonstrated that the reducing atmosphere in anode effectively induce the NiFe alloy nanoparticles exsolution from LSCFN, and provide abundant active sites for dry reforming. Anode sup-ported single cells with LSCFN-Ce0.9Gd0.1O2-delta (LSCFN-GDC) composite reforming catalyst show excellent elec-trochemical performance in both H-2 and CH4-CO2, and the peak power densities of 686.05 and 684.83 mW.cm(-2) are obtained at 800 degrees C, respectively. The dry reforming of 50 %CH(4-)50 %CO2 integrated with LSCFN-GDC reforming catalyst is sustained for 100 h stable performance at 700 degrees C without any degradation, which are further confined by the experimental verification and thermodynamic calculation. These results demonstrate that additional dry reforming catalyst is an effective strategy to effectively manipulate CH4-CO2 reforming and electrochemical performance for energy purposes.