A kind of au-pd/graphene catalyst and its preparation method and application
A graphene and catalyst technology, applied in the field of catalyst preparation and sustainable development of the environment and energy, to achieve the effects of high photocatalytic activity and selectivity, high catalytic efficiency, and simple preparation
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Embodiment 1
[0034] 95 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, followed by the addition of 1.27 mL of 10 mM HAuCl 4 and 2.35 mL of 10 mM H 2 PdCl 4 solution, and stirred for 0.5h. Under the condition of stirring, slowly add 50mL of 0.15M NaBH 4 solution, and then the reaction solution was heated to reflux at 100°C for 24h. After the reaction was completed and cooled to room temperature, the solid-liquid was separated by filtration, the solid was washed with water, and dried in an oven at 60°C to obtain a 2.5wt%Au-2.5wt%Pd / GR catalyst. For comparison, only a single metal precursor salt was added to synthesize 5wt%Au / GR and 5wt%Pd / GR catalysts under the same conditions. In a 100mL thermal catalytic reactor, add 50mg of catalyst and 20mL of benzyl alcohol and stir and mix evenly, then set the thermal catalytic reaction conditions, the temperature of the reaction is 100°C, the stirring rate is 1500 rpm and the pressure is 3 atmospheres of oxygen, acc...
Embodiment 2
[0038] 95 mg of graphene oxide was ultrasonically dispersed in 100 mL of deionized water, followed by the addition of 1.27 mL of 10 mM HAuCl 4 and 2.35 mL of 10 mM H 2 PdCl 4 solution, and stirred for 0.5h. Under the condition of stirring, slowly add 50mL of 0.15M NaBH 4 solution, and then the reaction solution was heated to reflux at 100°C for 24h. After the reaction was completed and cooled to room temperature, the solid-liquid was separated by filtration, the solid was washed with water, and dried in an oven at 60°C to obtain a 2.5wt%Au-2.5wt%Pd / GR catalyst. For comparison, only a single metal precursor salt was added to synthesize 5wt%Au / GR and 5wt%Pd / GR catalysts under the same conditions. 80 mg of NaBH 4 Mix well with 160mL of p-nitroaniline with a concentration of 10ppm, and then add 5mg of catalyst. With the progress of the catalytic reaction, p-nitroaniline is reduced to p-phenylenediamine. The relevant data are shown in Table 2.
[0039] Table 2 is the activity...
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