Alkali metal doped and modified composite metal catalyst as well as preparation method and application thereof

The invention discloses an alkali metal doped and modified composite metal catalyst and a preparation method and application thereof, the composite metal catalyst takes alkali metal doped and modified lanthanide metal oxide and/or alkali metal doped and modified alkaline earth metal oxide as a carrier, and the carrier is loaded with a transition metal active center. According to the catalyst, transition metal serves as a main active center, the transition metal is loaded on lanthanide metal oxide and/or alkaline earth metal oxide and cooperates with the transition metal to provide rich oxygen vacancy sites, and after alkali metal doping modification, the hydrogenation activity of furan derivatives can be further improved, the selectivity of 1, 5-pentanediol is reduced, and the hydrogenation activity of the furan derivatives is improved. Meanwhile, the preparation method of the catalyst is simple, the raw materials are easy to obtain, the cost is low, and the catalyst has industrial production value. 本发明公开了一种碱