Palladium-based deoxidation catalyst as well as preparation method and application thereof

The invention relates to the technical field of deoxidation catalysts, and discloses a palladium-based deoxidation catalyst and a preparation method and application thereof, the palladium-based deoxidation catalyst contains a carrier, and an active component and an auxiliary agent loaded on the carrier; wherein the active components comprise Pd (palladium), PdO2 (palladium dioxide) and PdO (palladium oxide); the auxiliary agent is one or more than two of oxides of Ce, Mg, Zr and Na. According to the palladium-based deoxidation catalyst provided by the invention, the catalyst surface oxygen vacancy can be efficiently constructed by adding the auxiliary agent and regulating and controlling the variety and proportion of the active components on the surface of the catalyst, so that the content of the palladium element is reduced, the adsorption capacity of O2 on the surface of the catalyst is improved, and the adsorption and activation of oxygen are promoted; further, the deoxidation efficiency of the catalyst is