Solid　oxide　electrolysis　cells　with　La0·75Sr0·25Cr0·5Mn0·5O3-δ　(LSCM)　cathode　can　electrolyze　CO2　to　generate　chemical　fuels.　Nevertheless,　the　cathode　performance　is　limited　by　its　electrocatalytic　activity.　In　this　work,　metal　nanoparticles　including　Ni,　Cu　and　NiCu　metals　are　successfully　impregnated　in　LSCM　electrode　to　improve　its　activity.　XRD,　XPS,　SEM　and　TEM　together　confirm　the　metal　nanocatalysts　are　homogeneously　distributed　on　LSCM　backbone　and　therefore　create　active　electrochemical　interface　for　CO2　splitting.　Electrical　properties　of　LSCM　with　impregnated　metal　nanoparticles　are　investigated　and　correlated　to　electrode　performances.　Electrochemical　measurements　show　that　the　NiCu-LSCM　demonstrates　the　optimum　performance　without　degradation　after　operation　for　∼100　h　and　∼10　redox　cycles.　It　is　believed　that　the　enhanced　performance　of　CO2　electrolysis　may　be　attributed　to　the　synergetic　effect　of　metal　nanocatalyst　and　LSCM　ceramic　electrode.　©　2017　Elsevier　B.V.