Palladium foil is widely used in hydrogen purification and sensing due to its high permeability to hydrogen gas. When heated, the foil selectively allows hydrogen to pass through while blocking other gases, making it ideal for hydrogen separation membranes in industrial and laboratory settings. It is also employed in catalytic applications, especially in reactions involving hydrogenation and dehydrogenation. The foil serves as a key component in electrochemical devices, such as fuel cells and sensors, where its stability and conductivity are advantageous. In research, it is used as a substrate for thin film deposition and in the development of specialized electrodes. Its high purity and mechanical strength support reliable performance in demanding environments.