Free-Base Porphyrin Aggregates Combined with Nickel Phosphite for Enhanced Alkaline Hydrogen Evolution

In response to the escalating global energy requests and need address them in a sustainable manner, researchers have identified hydrogen as an vector that provides practical way store use from renewable sources. To make step forward, electrocatalytic properties for evolution reaction alkaline medium of graphite electrodes modified with combinations nickel phosphite free-base porphyrins were investigated voltammetrically. The sample obtained by combining respective 5,10,15,20-tetrakis(4-methoxyphenyl)porphyrin exhibited highest catalytic activity, surpassing observed specimens manufactured using individual catalysts thus providing enhanced water-splitting performance. best electrode displayed overpotential 0.43 V (at i = −10 mA/cm2) Tafel slope 0.14 V/dec. Since activity compositions containing metal salt has not been previously studied, investigation its outcome constitute original contribution growing literature, new opportunities obtaining better results than ones reported solely phosphite.