Hydrogen is a promising clean energy source for the future, and scientists are focusing on using PEM water electrolysis to produce high-purity hydrogen efficiently. Compared to other methods, PEM electrolysis is more efficient and easier to maintain. Researchers have been working on improving the electrocatalysts for this process, especially for the hydrogen and oxygen reactions. They have also been looking at other components of the PEM cell to make the technology even better. The goal is to overcome current challenges and make PEM water electrolysis a key technology for future hydrogen production.