The increasing population of the world demands more efficient and renewable energy sources as our energy sources are limited. Hydrogen is a renewable, environmentally friendly, and cost-effective source of energy that has the potential to replace our traditional energy sources such as fossil fuels. Electrochemical water splitting is a clean and cost-effective way to produce hydrogen on a global scale by hydrogen evolution reaction (HER). However, a highly active and efficient electro catalyst is required for this reaction to occur. To date, platinum (Pt.) is the most active catalyst towards HER; however, the high price and low abundance limit its large-scale applications. Many research groups are trying to develop new alternative electro catalysts having high electrochemical performance, high stability, and low cost.
