Praseodymium hydride is an off-white powdery solid with strong reducibility and activity, which can react with water and acid to release hydrogen. It can be prepared by reacting praseodymium metal with hydrogen at high temperatures. The main use of praseodymium hydride is as an alloy additive, which can be formed with other metals to improve the mechanical properties and heat resistance of materials. In addition, praseodymium hydride can also be used as a hydrogen storage material to store and release hydrogen, which contributes to the research and application of hydrogen energy.