Electrochemical performance of porous Ni-alloy electrodes for hydrogen evolution reaction from seawater electrolysis

The hydrogen evolution reaction in seawater is investigated using porous Ni-Cr-Fe, Ni-Fe-Mo, Ni-Fe-C and Ni-Ti electrodes, prepared by elemental powder reactive synthesis methods. The open porosity of the four kinds of electrode materials is 23.05%, 20.47%, 25.27%, and 29.05%, respectively. The electrochemical performance of the four kinds of electrodes has been researched by polarization measurement, cyclic voltammetry and electrochemical impedance spectroscopy. The preliminary results demonstrate that the porous Ni-Cr-Fe electrode has superior catalytic activity and relatively good long-term stability for hydrogen evolution reaction in seawater. The high efficiency and reasonable stability of the porous Ni-Cr-Fe electrode catalyst demonstrate its promising applications in the rising hydrogen revolution.