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-delta　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-delta　substrate　create　sufficient　and　active　triple-phase　boundary　(TPB)　for　electrochemical　carbon　dioxide　splitting.　Electrochemical　measurements　show　that　this　tailored　SrFeO3-delta　cathode　demonstrates　better　performance,　and　then　exhibits　long-term　stability　after　100　h　operation　and　8　redox　cycles.　(C)　2018　Hydrogen　Energy　Publications　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.