Ru-based ammonia decomposition hydrogen production catalyst and preparation method thereof

The invention discloses a Ru-based ammonia decomposition hydrogen production catalyst and a preparation method thereof, and belongs to the technical field of ammonia decomposition hydrogen production. The preparation method is a colloid precipitation method and comprises the following steps: dispersing Ru metal salt in an alcohol solvent, adding an alkali solution into the alcohol solvent, and conducting reacting at a certain temperature to prepare Ru colloid; and dispersing a metal oxide carrier in an aqueous solution, adding a certain amount of Ru colloid, and conducting stirring, drying, roasting and forming to prepare the supported metal Ru catalyst. Compared with a traditional equivalent-volume impregnation method and a deposition-precipitation method, the Ru colloid serves as a precursor and is loaded on the metal oxide carrier, the acting force between Ru and the carrier is enhanced, and the prepared catalyst Ru microcrystal is in a highly dispersed state, shows excellent low-temperature ammonia decomp