The need for efficient, sustainable, and cost-effective catalysts for the hydrogen evolution reaction (HER) has significantly increased in recent years, alongside the growing interest in renewable energy sources. Nickel-based catalysts have emerged as one of the most promising alternatives to platinum and other precious metal catalysts, owing to their favourable electrochemical properties and affordability. However, further improvements in their activity and stability are still necessary. In this study, we aimed to investigate the influence of iron additives in alkaline solutions on the activity and stability of nickel catalysts in the hydrogen evolution reaction. We employed the gas diffusion electrode method, operating under conditions closely resembling those in industrial electrolysers and fuel cells. The samples were characterized using electrochemical methods, including linear sweep voltammetry (LSV), chronoamperometry (CP), and electrochemical impedance spectroscopy (EIS). This work suggests one of the possible directions for the development of nickel catalysts and thereby contributes to the advancement of efficient and sustainable hydrogen production technologies.
|
