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　,　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　,　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(-)IIZn-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　cat-alysts　after　Zn　doping.　(C)　2023　Elsevier　Inc.　All　rights　reserved.