Kinetically　sluggish　ammonia　oxidation　and　interference　of　H-2　competing　with　NH3　active　sites　will　suppress　the　output　performance　of　direct　ammonia　solid　oxide　fuel　cell　(DA-SOFC).　Herein,　we　select　Zn2+　doped　into　Pr2NiO4　as　precursor　of　Pr2Ni1-xZnxO4　(PNZx)　that　can　be　destroyed　and　converted　into　Pr2O3　together　with　in-situ　Ni　reduction,　realizing　the　redistribution　of　elements　in　reduction　atmosphere.　Meanwhile,　the　foreign　Zn2+　as　a　low-valent　element　is　retained　in　Pr2O3　lattice　due　to　the　high　segregation　Gibbs　free　energy　to　form　Ni/Pr2-xZnxO3,　which　aggravates　the　change　of　Pr3+　and　Pr4+,　thus　enhancing　the　oxygen　vacancy　concentration.　The　Zn2+　promotes　the　reduction　of　Ni　and　quenches　the　adsorption　capacity　of　H-2,　alleviating　the　＂hydrogen　poisoning＂　behavior.　As　a　result,　the　maximum　powder　density　of　single　cell　based　on　PNZ0.1　supported　by　YSZ　electrolyte　is　134　mWcm(-2)　at　800　degree　celsius,　which　is　more　than　twice　higher　than　that　of　Ni/YSZ.　Various　characterizations　reveal　that　the　NH3　reaction　path　is　the　synergistic　occurrence　of　ammonia　decomposition　and　ammonia　oxidation.