Solid　Oxide　Electrolysis　Cells　(SOECs)　can　electro-reduce　carbon　dioxide　to　carbon　monoxide,　which　not　only　effectively　utilizes　greenhouse　gases,　but　also　converts　excess　electrical　energy　into　chemical　energy.　Perovskite-based　oxides　with　exsolved　metal　nanoparticles　are　promising　cathode　materials　for　direct　electrocatalytic　reduction　of　CO2　through　SOECs,　and　have　thus　received　increasing　attention.　In　this　work,　we　doped　Pr0.7Ba0.3MnO3−δ　at　the　B　site,　and　after　reduction　treatment,　metal　nanoparticles　exsolved　and　precipitated　on　the　surface　of　the　cathode　material,　thereby　establishing　a　stable　metal–oxide　interface　structure　and　significantly　improving　the　electrocatalytic　activity　of　the　SOEC　cathode　materials.　Through　research,　among　the　Pr0.7Ba0.3Mn1−xNixO3−δ　(PBMNx　=　0–1)　cathode　materials,　it　has　been　found　that　the　Pr0.7Ba0.3Mn0.9Ni0.1O3−δ　(PBMN0.1)　electrode　material　exhibits　greater　catalytic　activity,　with　a　CO　yield　of　5.36　mL　min−1　cm−2　and　a　Faraday　current　efficiency　of　~99%.　After　100　h　of　long-term　testing,　the　current　can　still　remain　stable　and　there　is　no　significant　change　in　performance.　Therefore,　the　design　of　this　interface　has　increasing　potential　for　development.　©　2024　by　the　authors.