Hydrogen　has　a　high　energy　density　of　approximately　120　to　140　MJ　kg−1,　which　is　very　high　compared　to　other　natural　energy　sources.　However,　hydrogen　generation　through　electrocatalytic　water　splitting　is　a　high　electricity　consumption　process　due　to　the　sluggish　oxygen　evolution　reaction　(OER).　As　a　result,　hydrogen　generation　through　hydrazine-assisted　water　electrolysis　has　recently　been　intensively　investigated.　The　hydrazine　electrolysis　process　requires　a　low　potential　compared　to　the　water　electrolysis　process.　Despite　this,　the　utilization　of　direct　hydrazine　fuel　cells　(DHFCs)　as　portable　or　vehicle　power　sources　necessitates　the　development　of　inexpensive　and　effective　anodic　hydrazine　oxidation　catalysts.　Here,　we　prepared　oxygen-deficient　zinc-doped　nickel　cobalt　oxide　(Zn-NiCoOx-z)　alloy　nanoarrays　on　stainless　steel　mesh　(SSM)　using　a　hydrothermal　synthesis　method　followed　by　thermal　treatment.　Furthermore,　the　prepared　thin　films　were　used　as　electrocatalysts,　and　the　OER　and　hydrazine　oxidation　reaction　(HzOR)　activities　were　investigated　in　three-　and　two-electrode　systems.　In　a　three-electrode　system,　Zn-NiCoOx-z/SSM　HzOR　requires　−0.116　V　(vs　RHE)　potential　to　achieve　a　50　mA　cm−2　current　density,　which　is　dramatically　lower　than　the　OER　potential　(1.493　V　vs　RHE).　In　a　two-electrode　system　(Zn-NiCoOx-z/SSM(-)∥Zn-NiCoOx-z/SSM(+)),　the　overall　hydrazine　splitting　potential　(OHzS)　required　to　reach　50　mA　cm−2　is　only　0.700　V,　which　is　dramatically　less　than　the　required　potential　for　overall　water　splitting　(OWS).　These　excellent　HzOR　results　are　due　to　the　binder-free　oxygen-deficient　Zn-NiCoOx-z/SSM　alloy　nanoarray,　which　provides　a　large　number　of　active　sites　and　improves　the　wettability　of　catalysts　after　Zn　doping.　©　2023　Elsevier　Inc.