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Au-Pd/graphene catalyst and preparation method and application thereof

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 environmental friendliness, high photocatalytic activity and selectivity, and simple preparation

Active Publication Date: 2015-01-28
MINNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although some studies have reported monometallic or bimetallic particles supported on the surface of graphene or graphene oxide, these studies still use surfactants, polymers, and polyelectrolytes to protect the formation of bimetallic alloy particles during synthesis.

Method used

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  • Au-Pd/graphene catalyst and preparation method and application thereof
  • Au-Pd/graphene catalyst and preparation method and application thereof
  • Au-Pd/graphene catalyst and preparation method and application thereof

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Experimental program
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Effect test

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 0.5 h. While stirring, slowly add 50 mL of 0.15 M NaBH 4 solution, and then the reaction solution was heated to reflux at 100 °C for 24 h. 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 2.5 wt %Au-2.5 wt %Pd / GR catalyst. For comparison, only a single metal precursor salt was added to synthesize 5 wt %Au / GR and 5 wt %Pd / GR catalysts under the same conditions. In a 100 mL thermal catalytic reactor, add 50 mg of catalyst and 20 mL of benzyl alcohol and stir to mix evenly, then set the thermal catalytic reaction conditions, the reaction temperature is 100 ° C, the stirring rate is 1500 rpm and the pressure is 3 atmospheres Oxygen, along with th...

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 0.5 h. While stirring, slowly add 50 mL of 0.15 M NaBH 4 solution, and then the reaction solution was heated to reflux at 100 °C for 24 h. 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 2.5 wt %Au-2.5 wt %Pd / GR catalyst. For comparison, only a single metal precursor salt was added to synthesize 5 wt %Au / GR and 5 wt %Pd / GR catalysts under the same conditions. 80 mg of NaBH 4 Mix well with 160 mL of p-nitroaniline with a concentration of 10 ppm, and then add 5 mg 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 o...

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Abstract

The invention provides an Au-Pd / graphene catalyst and a preparation method and application thereof, and the Au-Pd bimetallic alloy supported graphene catalyst is prepared from graphene oxide, HAuCl4, H2PdCl4 and NaBH4 as raw materials through a one-step reflux. For the first time, the Au-Pd / graphene catalyst is used for solvothermal-free selective oxidation of phemethylol and catalytic reduction of paranitroaniline, and catalytic efficiency and selectivity are high. The catalyst has the advantages of simple preparation method, uses low temperature heat energy as driving energy, is used for the selective oxidation reduction of organic compounds, and is helpful for the sustainable development of the environment and energy.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and sustainable development of environment and energy, and specifically relates to the preparation of an Au-Pd / graphene catalyst and the catalytic selective oxidation of benzyl alcohol to benzaldehyde and the reduction of p-nitroaniline to p-phenylenediamine. Background technique [0002] Compared with single-component metals, the structure and electronic properties of bimetallic alloys are obviously different, and bimetallic alloys have obvious advantages in improving the catalytic activity and selectivity. However, the traditional method of synthesizing bimetallic alloy nanoparticles usually requires the use of surfactants as protective agents to synthesize stable bimetallic alloy colloids, and then the alloy is loaded on a carrier to make it a catalyst. Therefore, it is most desirable to directly synthesize stabilizer-free bimetallic alloy particles in solution and simultaneously support the...

Claims

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Application Information

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IPC IPC(8): B01J23/52C07C45/38C07C47/54C07C209/36C07C211/51
Inventor 张燕辉高飞
Owner MINNAN NORMAL UNIV
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