Non-noble metal catalyst based on carbon quantum dots and preparation method thereof

The invention discloses a non-noble metal catalyst based on carbon quantum dots and a preparation method thereof. The preparation method comprises the following steps: 1) adding carbon quantum dots and cobalt nitrate into deionized water according to a mass ratio of 1: 8, and uniformly mixing to obtain a sample D; 2) adding melamine into deionized water according to the mass ratio of melamine to cobalt nitrate of 1: 8, and heating and stirring to dissolve the melamine to obtain a solution E; 3) mixing and uniformly stirring the sample D and the solution E, putting the mixture into a hydrothermal reaction kettle, carrying out heat preservation for several hours at 140-200 DEG C, cooling, centrifuging, washing with alcohol, and carrying out vacuum drying to obtain a sample F; and 4) flatly laying the sample F in a magnetic boat, placing the magnetic boat in a tubular atmosphere furnace, raising the temperature to 500-1000 DEG C from room temperature in an inert gas atmosphere at a temperature raising rate of 5-