Ru-CeO2 catalyst is widely used in various industrial and environmental applications due to its excellent catalytic properties. It plays a crucial role in catalytic converters for automobiles, where it helps reduce harmful emissions by converting nitrogen oxides, carbon monoxide, and unburned hydrocarbons into less harmful substances like nitrogen, carbon dioxide, and water. This catalyst is also employed in hydrogen production processes, such as steam reforming of methane, where it enhances the efficiency of hydrogen generation while minimizing carbon deposition. Additionally, Ru-CeO2 is utilized in fuel cells to improve the oxidation of fuels and the reduction of oxygen, thereby increasing the overall performance of the cell. In chemical synthesis, it is used to facilitate selective oxidation reactions, enabling the production of high-value chemicals with greater precision. Its stability and activity at high temperatures make it a preferred choice in various catalytic applications that require durability and efficiency.