Review on Recent Advances of Nickel Sulfide Nano Electrocatalysts for Hydrogen Evolution

Hydrogen is an important energy carrier without carbon emissions. To achieve a carbon-neutral world, the demand for hydrogen is very significant. In the process of producing green hydrogen, water splitting using electrocatalysts is a desirable process among many methods. The ideal electrocatalyst for hydrogen evolution is the platinum group of metals; however, the limitations of high cost and low abundance hinder large-scale hydrogen production. Hence, researchers are trying to develop materials from more abundant and less expensive. Hence, in this review, we focus on the fundamental principles of hydrogen evolution reaction (HER) and various synthesis methods and strategies. From the material perspective, we focus on nickel sulfide-based nanomaterials of different phases during the last four years of development. We compared the electrocatalyst parameters concerning the synthesis methods and strategies chosen. Finally, we have also discussed future challenges. Ultimately, by synthesizing the collective knowledge amassed in the field of HER research, this review endeavors to offer a comprehensive resource for researchers, engineers, and policymakers striving to advance hydrogen-based energy technologies. In doing so, we aspire to foster continued innovation and collaboration toward realizing a sustainable energy future powered by hydrogen. This review article on nickel sulfide as an electrocatalyst for hydrogen evolution reaction (HER) focuses on the current developments in nickel sulfide HER catalysts. A basic overview of the Hydrogen Evolution Reaction (HER) and an analysis of the benefits and drawbacks of various synthesis techniques and strategies such as doping, morphological control, and composite engineering are given. image