Platinum palladium platinum/manganese dioxide/graphene layered structure catalyst and preparation method
A structural catalyst, manganese dioxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the loss of catalyst carrier value, reduce catalyst load points, The problem of slow electrocatalytic oxidation rate, etc., can achieve excellent electrochemical performance, improve the ability to resist CO poisoning, and facilitate adsorption and oxidation.
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Embodiment 1
[0036] First, 15 mg of graphene oxide prepared by the modified hummers method was dissolved in 30 mL of deionized water, and ultrasonicated for 1 hour to obtain a yellow-brown uniform suspension. Then, under the condition of vigorous stirring, 1 mL of 0.05M potassium permanganate solution was quickly added, and the resulting mixed solution was stored at room temperature for 12 hours. After centrifugation, wash with deionized water and dry. A manganese dioxide-doped graphene oxide composite (MnO 2 / GO). Dissolve 1 mg of the complex prepared above in 1 mL of deionized water to obtain 1 mg / mL of MnO 2 / GO solution, sonicated for 1 hour. Immerse the three-electrode system (glassy carbon electrode, saturated calomel electrode and platinum wire electrode) in the solution, carry out cyclic voltammetry scanning, scan speed 25mV / s, scan 10 laps, obtain the graphene modification of manganese dioxide doping electrode (MnO 2 / G). Immerse the prepared electrode in 1mM chloroplatinic ...
Embodiment 2
[0045] First, 15 mg of graphene oxide prepared by the modified hummers method was dissolved in 30 mL of deionized water, and ultrasonicated for 1 hour to obtain a yellow-brown uniform suspension. Then, under the condition of vigorous stirring, 1 mL of 0.05M potassium permanganate solution was quickly added, and the resulting mixed solution was stored at room temperature for 12 hours. After centrifugation, wash with deionized water and dry. A manganese dioxide-doped graphene oxide composite (MnO 2 / GO). Take 1mg of the MnO prepared above 2 / GO was dissolved in 2 mL of deionized water to obtain 0.5 mg / mL of MnO 2 / GO solution, sonicated for 1 hour. Immerse the three-electrode system (glassy carbon electrode, saturated calomel electrode and platinum wire electrode) in the solution, carry out cyclic voltammetry scanning, scan speed 50mV / s, scan 30 circles, obtain the graphene modification of manganese dioxide doping the electrodes. Immerse the prepared electrode in 2mM chlor...
Embodiment 3
[0047] First, 15 mg of graphene oxide prepared by the modified hummers method was dissolved in 30 mL of deionized water, and ultrasonicated for 1 hour to obtain a yellow-brown uniform suspension. Then, under the condition of vigorous stirring, 1 mL of 0.05M potassium permanganate solution was quickly added, and the resulting mixed solution was stored at room temperature for 12 hours. After centrifugation, wash with deionized water and dry. Obtain a manganese dioxide doped graphene oxide composite MnO 2 / GO. Take 1.5mg of the above prepared MnO 2 / GO was dissolved in 2 mL of deionized water to obtain 0.75 mg / mL of MnO 2 / GO solution, sonicated for 1 hour. The three-electrode system (glassy carbon electrode, saturated calomel electrode and platinum wire electrode) was immersed in the solution, and a cyclic voltammetry scan was performed at a scan rate of 100mV / s for 20 cycles to obtain a manganese dioxide-doped graphene-modified The electrode MnO 2 / G. Immerse the prepare...
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