Catalyst for preparing nitric acid from nitrous oxide as well as preparation method and application of catalyst

The invention provides a catalyst for preparing nitric acid from nitrous oxide and a preparation method and application thereof, and belongs to the technical field of catalysts, the catalyst is a metal oxide, the metal oxide comprises an active component and a modified component, and the active component comprises iron, copper, cobalt, zinc, manganese, zirconium and nickel; the modified components comprise aluminum, magnesium and lanthanum; the molar ratio of the active component to the modified component is (4-55): (1-3); the metal oxide is microcosmically and integrally in a long strip shape and is formed by stacking ordered nano-particles, and the catalyst is prepared by treating a nitrate solution of the active component, a nitrate solution of the modified component and a precipitator solution through a coprecipitation method and is applied to preparation of nitric acid from nitrous oxide. The invention provides a catalyst for preparing nitric acid from nitrous oxide as well as a preparation method and ap