A　paired　electrochemical　refinery　toward　the　cathodic　nitrate　reduction　reaction　(NO3RR)　and　anodic　glycerol　oxidation　reaction　(GOR)　driven　by　renewable　electricity　could　generate　high　value-added　ammonia　and　formic　acid　simultaneously.　However,　both　cathode　and　anode　electrocatalysts　often　suffer　from　low　efficiency　and　unclear　reconstruction.　Herein,　we　prepare　a　non-noble　NiCu-OH　nanocomposite　precatalyst　composed　of　crystalline　Cu-2(OH)(3)(NO3)　and　amorphous　Ni(OH)(2),　which　can　be　reconstructed　into　high-activity　and　stable　cathodic　NO3RR　and　anodic　GOR　electrocatalysts　under　operating　conditions.　Various　in　situ　and　ex　situ　experiments　demonstrate　that　NiCu-OH　could　convert　into　active　Cu　nanoparticles　coupled　with　amorphous　Ni(OH)(2)　under　cathodic　NO3RR　conditions.　Meanwhile,　under　anodic　GOR　conditions,　NiCu-OH-derived　bimetal　oxide　(NiCuO)　changes　into　active　NiOOH　species　composited　with　Cu　vacancy-rich　CuO.　Furthermore,　an　actual　paired　electrochemical　refinery　with　the　reconstructed　NiCu-based　catalysts　toward　the　NO3RR　and　GOR　shows　a　low　potential　of　1.37　V　at　a　current　density　of　100　mA　cm(-2)　to　continuously　produce　ammonium　and　formate.　This　study　provides　a　new　paradigm　for　the　design　of　an　electrochemical　refinery　with　reconstructed　non-noble　electrocatalysts　toward　chemical　upgradation.