Reverse structure catalyst as well as preparation method and application thereof

The invention provides a reverse structure catalyst and a preparation method and application thereof, the reverse structure catalyst comprises a nano metal oxide and a metal substrate, the nano metal oxide is dispersed and loaded on the metal substrate, and the particle size of the nano metal oxide is 2-10 nm. According to the reverse structure catalyst, the nano metal oxide is relatively small in size and is loaded on the surface of the metal substrate in a highly dispersed manner, so that the oxide-metal reverse structure catalyst with rich interface sites is formed. The catalyst strengthens the interface interaction between the oxide and the metal, avoids the sintering of the metal, and shows excellent catalytic performance in the carbon dioxide hydrogenation reaction. According to the preparation method of the catalyst, the nano metal oxide is uniformly and highly dispersed on the surface of the metal substrate by utilizing the effective control of the nonionic surfactant on the size of the nano oxide and