Electrocatalytic　hydrogen　evolution　is　an　efficient　and　economical　technology　to　address　environmental　contamination　and　energy　crises,　but　the　development　of　such　a　high-efficiency　and　energy-saving　sustainable　hydrogen　production　system　remains　a　great　challenge.　Here,　we　present　a　novel　strategy　to　design　a　self-driven　dual　hydrogen　production　system　for　efficient　hydrogen　production　based　on　highly-dispersed　single　Rh　atoms　supported　on　an　oxygen-functionalized　Ti3C2Ox　MXene　(Rh-SA/Ti3C2Ox)　catalyst.　The　bifunctional　Rh-SA/Ti3C2Ox　catalyst　exhibits　remarkable　catalytic　activities　towards　both　the　pH-universal　hydrogen　evolution　reaction　(HER)　and　hydrazine　oxidation　reaction　(HzOR).　Using　Rh-SA/Ti3C2Ox　as　the　electrode　in　the　self-driven　dual　hydrogen　production　system　by　combining　a　Zn-H-2　battery　and　overall　hydrazine　splitting　units,　an　ultra-high　H-2　generation　rate　of　45.77　mmol　h(-1)　can　be　achieved.　Density　functional　theory　calculations　indicate　that　the　atomically　dispersed　single　Rh　atoms　not　only　make　the　free　energy　of　adsorbed　H　(Delta　G(*H))　more　thermoneutral　for　the　HER　but　also　largely　decrease　the　free-energy　barrier　of　the　dehydrogenation　of　adsorbed　NHNH2　for　the　HzOR.