Manganese oxide supported catalyst, preparation method thereof and preparation method of formic acid

[0029] The present invention also provides a preparation method of the manganese oxide supported catalyst described in the above scheme, comprising the following steps:

[0030] The mixed aqueous solution of the manganese source and the precursor of the metal oxide auxiliary agent is mixed with the carrier, and then evaporated to dryness and calcined in sequence to obtain the manganese oxide supported catalyst.

[0031]In the present invention, the molar ratio of the manganese source to the metal oxide auxiliary agent precursor is preferably 1:(0.025~0.080), more preferably 1:(0.030~0.070), further preferably 1:(0.045~0.055 ); the molar ratio of the manganese source and water is preferably 1:(0.8~2.8), more preferably 1:(1.0~2.2), more preferably 1:(1.4~1.9); the manganese source preferably includes KMnO 4 , (CH 3 COO) 2 Mn and Mn(NO 3 ) 2 One or more of them; the metal oxide additive precursor preferably includes Fe(NO 3 ) 3 , (CH 3 COO) 2 Zn, Ce(NO 3 ) 3 , (NH 4 ) 2

[0038] Take 0.31g KMnO 4 , 0.01g (NH 4 ) 2 MoO 4 Dissolve in 30mL deionized water, add 0.2g ZSM-5, stir at room temperature for 4h, then transfer to 90°C oil bath and heat until the water evaporates to dryness, place the material in a muffle furnace and calcinate at 500°C for 3h to obtain Mn - Mo / ZSM-5 supported catalyst.

[0040] Take 0.35g KMnO 4 , 0.02g Co(NO 3 ) 2 Dissolve in 50mL deionized water, add 0.2g ZSM-5, stir at room temperature for 5h, then transfer to 90°C oil bath and heat until the water evaporates to dryness, place the material in a muffle furnace and calcinate at 600°C for 3h to obtain Mn - Co / ZSM-5 supported catalyst.