Bimetal-based composite catalyst with fluffy structure as well as preparation method and application of bimetal-based composite catalyst

The invention discloses a fluffy-structure bimetal-based composite catalyst and a preparation method and application thereof.According to the preparation method, due to selection of raw materials and matching of the quantities of the raw materials, the catalyst with the unique fluffy structure is prepared, and due to the unique structure, the surface area of a catalyst material is increased, the surface roughness is increased, and the specific surface area of the catalyst material is increased; the surface active sites are increased, so that the catalytic activity is favorably improved, and the reaction kinetics of hydrogen production by photocatalytic hydrolysis of sodium borohydride is improved; the preparation method has the advantages of being simple in preparation process, easy to operate, low in preparation cost and the like, is suitable for large-scale preparation, is simple in subsequent treatment process, is beneficial to separation and contact of the sodium borohydride fuel liquid and the catalyst,