A kind of atom dispersed water oxidation catalyst and its preparation and application
An atomically dispersed and catalyst technology, applied in the field of atomically dispersed water oxidation catalysts, can solve problems such as poor stability and unsuitability for practical applications, and achieve the effects of good catalytic stability, low preparation cost and broad application prospects.
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Embodiment 1
[0037] 40mg of manganese nitrate, 0.5g of graphene oxide and 100mL of water were sonicated in a 250mL beaker for 4 hours, then stirred at room temperature for 4 hours to mix well, and then the mixture was dried in air at 80°C. Finally, the obtained solid was ground into powder, and calcined at 700° C. for 4 hours in ammonia gas to obtain a black powder. Stir the obtained black powder in 5mol / L nitric acid solution at 80°C for one hour, filter, wash with water, and dry at 80°C, which is the catalyst with dispersed manganese atoms (Mn-G). The content of manganese in the catalyst is about 0.1%. The properties are shown in Table 1.
[0038] from Figure 1 to Figure 3 In the scanning and projection and spherical aberration transmission electron microscope given in , it can be found that the metal manganese in the catalyst we synthesized is mainly dispersed in the graphene framework at the atomic level.
Embodiment 2
[0040] 40mg of ferric nitrate, 0.5g of graphene oxide and 100mL of water were sonicated in a 250mL beaker for 4 hours, then stirred at room temperature for 4 hours to mix well, and then the mixture was dried in air at 80°C. Finally, the obtained solid was ground into powder, and calcined at 500° C. for 4 hours in ammonia gas to obtain a black powder. The obtained black powder was stirred in 5 mol / L nitric acid solution at 80°C for one hour, filtered, washed with water, and dried at 80°C to obtain a catalyst with dispersed iron atoms (Fe-G). performance see Figure 8 .
Embodiment 3
[0042] 40mg of nickel nitrate, 0.5g of graphene oxide and 100mL of water were sonicated in a 250mL beaker for 4 hours, then stirred at room temperature for 4 hours to mix well, and then the mixture was dried in air at 80°C. Finally, the obtained solid was ground into powder, and calcined at 500° C. for 4 hours in ammonia gas to obtain a black powder. The obtained black powder was stirred in 5 mol / L nitric acid solution at 80°C for one hour, filtered, washed with water, and dried at 80°C to obtain a nickel atom-dispersed catalyst (Ni-G). performance see Figure 8 .
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