Fabrication of PANI-TiO2 incorporated Ni-P electrode for alkaline water electrolysis

Composite incorporated Ni-P electrodes were fabricated for alkaline water electrolysis. The effect of (Polyaniline) PANI-TiO
2
polymer composite in hydrogen evolution efficiency of Ni-P electrode in NaOH medium was studied. Characterization of the composites was carried out by XRD and coating composition was confirmed by EDS analysis. Catalytic action of the fabricated electrodes was analysed by polarization and electrochemical impedance spectroscopic techniques. The optimized electrodes exhibited a lower overpotential value of 139 mV for hydrogen evolution reaction at 200 mA cm-2. The composite incorporated electrodes achieved enhanced catalytic activity as a result of improved active sites, increased surface roughness and decreased resistance for electron transfer reaction in comparison with pure Ni-P electrode.