Development of ??MnO ₂ Nanowire with Ni? and (Ni, Co)?Cation Doping as an Efficient Bifunctional Oxygen Evolution and Oxygen Reduction Reaction Catalyst

Manganese oxides (MnO 2 ) with nanowire morphology materials are a promising candidate for improving oxygen evolution and reduction reaction (OER/ORR) performance. In this work, we developed transition metal cation doping strategy into the ?-MnO tunnel structure to tune Mn oxidation states control uniform morphology, crystalline in order investigate effect of over bifunctional activity. The single Ni 2+ various loading concentrations resulted 8Ni-MnO exhibiting remarkable OER ORR activity owing their excessive concentration 3+ 4+ octahedral sites respectively. Further, Co leads an enhanced synergistic that significantly improves fraction quantity which is confirmed by average state. For, electrochemical performance 8Co-8Ni-MnO exhibits potential 1.77 V, Tafel slope value 68 mV dec -1 lower charge transfer resistance it active more positive onset 0.90 half-wave 0.80 better current density (4.7 mA cm -2 four-electron pathway. Moreover, (?E = E @10 – ORR@E 1/2 demonstrated 0.97 indicates excellent alkaline electrolyte solution.