The reduction of atmospheric CO2 emissions is considered fundamental to reduce global warming. High-temperature fuel 

cells coupled with CH4 reforming represent a promising solution that can utilize biogas for sustainable energy production 

and CO2 capture. However, achieving high catalytic activity and long-term stability requires the development of highly 

durable and efficient catalysts. In this study, a series of Ru-doped Sr0.90La0.10Ti1−xRuxO3 perovskite were synthesized 

and investigated. Under reducing conditions, Ru was successfully exsolved from the perovskite lattice forming dispersed 

nanoparticles strongly anchored to the catalyst surface. This process promoted the formation of oxygen vacancies enhancing

CO2 activation and generating an active metal-support interface. Among the investigated compositions, the catalyst 

with 5 mol% Ru exhibited the best balance between activity, stability and Ru utilization. This sample demonstrated stable 

CH₄ and CO₂ conversion rates over 1,300 h at 700 °C with a reduction in performance of about 5% over 1,000 h. In 

addition, it showed excellent resistance to carbon deposition, with no detectable coking observed throughout the duration 

of the test. These findings position Sr0.90La0.10Ti1−xRuxO3 as a promising candidate for integration into high-temperature 

fuel cell systems, offering both long-term stability and high efficiency under dry reforming conditions.