Modified graphene platinized catalyst, preparation method of modified graphene platinized catalyst and application of modified graphene platinized catalyst
A technology of platinum catalyst and graphene, which is applied in the field of modified graphene-supported platinum catalyst and its preparation, and achieves the effects of good stability, simple preparation method and mild reaction conditions
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Embodiment 1
[0042] Example 1: Preparation of Pt / 1,3-PDA-rGO catalyst according to the method of the present invention
[0043] 1) At room temperature, mix 3.0g of natural flake graphite, 3.0g of potassium persulfate and 3.0g of phosphorus pentoxide in a 100mL round-bottomed flask, then add 24mL of concentrated sulfuric acid and mix, at 80℃, oil bath constant temperature magnetic stirring The reaction is pre-oxidized for 120 minutes, cooled to room temperature, washed with deionized water to neutrality, and dried in vacuum at 60°C to obtain pre-oxidized graphite;
[0044] 2) Add 1.0g of pre-oxidized graphite to a 250mL round-bottomed flask under an ice water bath at 0℃, then add 35mL concentrated sulfuric acid and 5mL concentrated phosphoric acid, magnetically stir evenly, and then slowly add 0.5g NaNO 3 And 3.0gKMnO 4 ,Stir the reaction for another 30min; Heat up to 35℃ and stir for 120min at constant temperature, slowly add 98mL of deionized water, then heat up to 98℃, and slowly add 30mLH 2 O...
Embodiment 2
[0069] Example 2 (The co-solvent in this example is absolute ethanol)
[0070] 1) Same as Example 1;
[0071] 2) Same as Example 1;
[0072] 3) Take 250mg of graphene oxide into a 100mL round bottom flask, add 25mL of thionyl chloride, reflux and stir for 40h at 70℃, and then distill out the excess oxalyl chloride at 110℃ to obtain graphite acyl chloride Ene
[0073] 4) In the device of step 3), add 10mL 1,3-propanediamine and 50mL freshly distilled N,N-dimethylformamide (the analytically pure N,N-dimethylformamide will be collected after vacuum distillation N,N-dimethylformamide), under the protection of nitrogen, the reaction was reacted for 12h at 85°C with constant magnetic stirring, then N,N-dimethylformamide was removed by distillation under reduced pressure, and washed with acetone and absolute ethanol each , And then washed with deionized water to neutrality, and vacuum-dried the product at 60°C for 24h to obtain 1,3-propanediamine modified graphene, denoted as 1,3-PDA-rGO; ...
Embodiment 3
[0078] Example 3 (No co-solvent is added in this example)
[0079] 1) At room temperature, mix 3.0g of natural flake graphite, 3.0g of potassium persulfate and 3.0g of phosphorus pentoxide in a 100mL round-bottom flask, then add 24mL of concentrated sulfuric acid to mix, and stir at 50°C in an oil bath at constant temperature. The reaction is pre-oxidized for 180 minutes, cooled to room temperature, washed with deionized water to neutrality, and dried in vacuum at 70°C to obtain pre-oxidized graphite;
[0080] 2) Under 2℃ ice water bath, add 1.0g of pre-oxidized graphite to 250mL round bottom flask, then add 35mL concentrated sulfuric acid and 5mL concentrated phosphoric acid, magnetically stir evenly, and then slowly add 0.5g NaNO 3 And 3.0gKMnO 4 ,Stir the reaction for another 30min; Heat to 40℃ and stir for 240min at constant temperature, slowly add 98mL of deionized water, then heat to 95℃, slowly add 30mLH 2 O 2 The concentration is 30% hydrogen peroxide and 48mL deionized wate...
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