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Athira Krishnan,Sheik Muhammadhu Aboobakar Shibli 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.87 No.-
Ni-P coating (NPC) fabricated by electroless deposition has been widely accepted as an effective electrodefor alkaline hydrogen evolution reaction. Among the different strategies reported to improve the catalyticactivity of Ni-P electrode (NPE) further, incorporation of inorganic metal oxide composite is a provenmethod. Herein, we propose a modification of TiO2/TiO2-WO3 core-shell structured composite (a novelentity), by the application of conductive polyaniline (P-Ani), as a continuation of our earlier work on itssynthesis and characterization. The as-prepared polymer-metal oxide hybrid nanocomposite is thenemployed to modify the NPE by electroless deposition method. The improved surface characteristics ofthe modified NPE, after the incorporation of P-Ani/TiO2/TiO2-WO3 composite with reduced chargetransfer resistance and low overpotential for alkaline hydrogen evolution ( 65 mV at10 mA/cm2)corroborates its enhanced catalytic behavior. The increase in the number of catalytically active sites onthe NPE after modification through P-Ani composite is attributed to the enhanced characteristics foralkaline hydrogen evolution. Our strategy proposes a sustainable and low-cost electrode material,competent to the existing industrial electrocatalysts, for long term hydrogen evolution in alkalinemedium.