Non-Noble Transition Metal-Based Electrocatalysts for Green Hydrogen Production from Anion Exchange Membrane (AEM) Seawater Electrolyzer

Abstract

As water-scarce is increasing rapidly all over the world, water electrolysis might not be a practical approach for sustainable hydrogen production in the long term. Fortunately, hydrogen production from the anion exchange membrane (AEM) seawater electrolysis enables to achieve of sustainability and durability. But still, suitable electrocatalysts for hydrogen and oxygen evolution reactions in seawater are not figured out yet. Here we report non-noble transition metal-based electrocatalysts for hydrogen and oxygen evolution reaction in seawater electrolysis. The synthesized electrocatalysts were in-situ characterized in X-ray diffraction (XRD), scanning electron microscopy (SEM), Transition electron microscopy (TEM), Raman spectroscopy, and ex-situ characterized in linear sweep voltammetry (LSV), Chronopotentiometry, and impedance studies. Further, the electrocatalysts were investigated in a single-cell anion exchange membrane electrolyzer, and polarization curves, stability tests, and efficiency calculations were carried out. These research findings will be further investigated until attains the industrially required parameters of 1 A cm-2 at a low overpotential of 1.8 V.