High　temperature　carbon　dioxide　electrolyzers　are　expected　to　play　a　key　role　on　carbon-neutral　energy　cycle.　Here　we　report　a　novel　composite,　namely　perovskite　SrFeO3−δ　with　impregnated　Ni　nanoparticles,　as　an　advanced　cathode　materials　for　solid　oxide　electrolysis　cells　(SOECs).　The　XRD,　SEM　and　TEM　together　indicate　that　the　homogeneously　distributed　Ni　nanoparticles　on　SrFeO3−δ　substrate　create　sufficient　and　active　triple-phase　boundary　(TPB)　for　electrochemical　carbon　dioxide　splitting.　Electrochemical　measurements　show　that　this　tailored　SrFeO3−δ　cathode　demonstrates　better　performance,　and　then　exhibits　long-term　stability　after　100　h　operation　and　8　redox　cycles.　©　2018　Hydrogen　Energy　Publications　LLC