The role of nickel cobalt sulphide MOFs hybrids in electrochemical hydrogen generation: A critical review

Hydrogen has become an increasingly important source of energy due to the growing global population and energy demands. To meet these needs, electrolysis of water offers a substitute process for generating hydrogen from renewable sources. During this process, water was split with a catalyst into hydrogen and oxygen. Electrolysis of water could follow either acidic or a basic mechanism. The benchmark electro catalyst for electrolysis was Pt/C, which had 1.23 V is a low potential. However, the catalyst used in this process was expensive and composed of noble and precious metals. Therefore, a profoundly productive, non-precious, and stable electro catalyst was required for the hydrogen evolution process. Nickel (Ni) and cobalt (Co) when two metals combined showed the improved electrochemical characteristics. Promising improvements in electro catalytic efficiency are revealed while examining the synergistic effects of sulphide hybridization with NiCo for the Hydrogen Evolution Reaction (HER). In order to create NiCoS hybrids, researchers used metal-organic frameworks (MOFs), which shows a sizable surface area and are stable. Nickel cobalt sulfide (NiCoS) has thereby become a very reliable, economical, and effective electro-catalyst for the hydrogen evolution process, particularly in low pH settings. In this review, we discussed various NiCoS MOFs for electrochemical reactions, highlighting their different over potentials and Tafel slopes, it displayed how well the hydrogen evolution process had performed.