Application of Pd-C nano-composite material to oxidative catalysis of organic matter

A technology of nanocomposite materials and organic matter, applied in the direction of physical/chemical process catalysts, nanotechnology, nanotechnology, etc., can solve the problem of palladium-carbon catalyst catalytic activity needs to be improved, catalytic performance and stability are not good, active ingredient loading rate is not high, etc. problem, to achieve the effect of high load rate, uniform dispersion and low price

Inactive Publication Date: 2018-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional method, people use carbon black as a carrier, but the catalyst using carbon black as a carrier has poor catalytic performance and stability.
The existi...

Method used

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  • Application of Pd-C nano-composite material to oxidative catalysis of organic matter
  • Application of Pd-C nano-composite material to oxidative catalysis of organic matter
  • Application of Pd-C nano-composite material to oxidative catalysis of organic matter

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of Pd-C nanocomposite material, comprising the following steps:

[0030] (1) Dissolve 3g of carbon source material (sucrose) in 150g of water, heat to 70°C and stir to disperse evenly, add 0.3g of stabilizer (polyvinylpyrrolidone) and mix evenly to obtain a mixture; place the mixture in a polytetrafluoroethylene seal In an autoclave and kept at 200°C for 10h, filtered, and dried to obtain a hydrothermal reaction product;

[0031] (2) Grinding 2.06g of the hydrothermal reaction product in an agate mortar, the dark powder of the gained is placed in a tube furnace, 2 / N 2 (The flow rate of hydrogen is 30cm 3 / min; the flow rate of nitrogen is 30cm 3 / min), heated at 350°C for 2h to obtain a spherical carbon material;

[0032] (3) Spherical carbon material is ultrasonically dispersed in water to obtain a 1.0wt% suspension; under vigorous stirring (600rpm), 5mL of the suspension is added dropwise to 1mL of palladium(II) acetate solution (0.005mol / L) ...

Embodiment 2

[0034] A preparation method of Pd-C nanocomposite material, comprising the following steps:

[0035] (1) Dissolve 3g of carbon source material (starch) in 150g of water, heat to 70°C, stir and disperse evenly, add 0.4g of stabilizer (hexadecylmethylammonium bromide), and mix evenly to obtain a mixture; Seal the autoclave with tetrafluoroethylene and keep it at 200°C for 10h, filter and dry to obtain the hydrothermal reaction product;

[0036] (2) 2.05g of the hydrothermal reaction product is ground in an agate mortar, and the dark powder of the gained is placed in a tube furnace, 2 / N 2 (The flow rate of hydrogen is 30cm 3 / min; the flow rate of nitrogen is 30cm 3 / min), heated at 350°C for 2h to obtain a spherical carbon material;

[0037] (3) Spherical carbon material is ultrasonically dispersed in water to obtain a 1.0wt% suspension; under vigorous stirring (600rpm), 5mL of the suspension is added dropwise to 1mL of palladium(II) acetate solution (0.005mol / L) solution ...

Embodiment 3

[0039] A preparation method of Pd-C nanocomposite material, comprising the following steps:

[0040] (1) Dissolve 2g of carbon source material (glucose) in 150g of water, heat to 70°C and stir to disperse evenly, add 0.4g of stabilizer (sodium citrate) and mix evenly to obtain a mixture; place the mixture in a polytetrafluoroethylene seal In an autoclave and kept at 200°C for 10h, filtered, and dried to obtain a hydrothermal reaction product;

[0041] (2) 2g of the hydrothermal reaction product is ground in an agate mortar, and the dark powder of the gained is placed in a tube furnace, 2 / N 2 (The flow rate of hydrogen is 30cm 3 / min; the flow rate of nitrogen is 30cm 3 / min), heated at 350°C for 2h to obtain a spherical carbon material;

[0042](3) Spherical carbon material is ultrasonically dispersed in water to obtain a 1.0wt% suspension; under vigorous stirring (600rpm), 5mL of the suspension is added dropwise to 1mL of palladium(II) acetate solution (0.005mol / L) solut...

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Abstract

The invention belongs to the technical field of catalysts and discloses application of a Pd-C nano-composite material to oxidative catalysis of an organic matter. The application of the Pd-C nano-composite material to the oxidative catalysis of the organic matter is characterized in that the organic matter is methanol or formic acid; the Pd-C nano-composite material is obtained by the following processes: (1) uniformly mixing a carbon source material, a stabilizing agent and water, putting in a high-pressure reaction kettle for hydrothermal reaction, filtering and drying to obtain a hydrothermal reaction product; (2) performing heating treatment on the hydrothermal reaction product under H2/N2 to obtain a spherical carbon material; (3) dispersing the spherical carbon material in the waterto obtain a suspension; dropping the suspension in a palladium acetate solution, performing heating treatment, adding a reducing agent solution, centrifuging, washing and drying to obtain the Pd-C nano-composite material. The Pd-C nano-composite material disclosed by the invention not only is high in catalytic efficiency, good in catalytic performance and low in cost, but also is high in active ingredient loading rate and uniform in dispersion.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to the application of a Pd / C nanocomposite material in the oxidation catalysis of organic matter, especially the application in the oxidation catalysis of methanol or formic acid. Background technique [0002] In the catalytic oxidation of methanol, Pt-based catalysts have a very good catalytic effect, but Pt is very expensive and scarce resources, and in the oxidation of methanol, Pt will be poisoned by the intermediate products adsorbed during the oxidation of methanol. Compared with Pt, Pd is cheap and abundant in reserves. [0003] Palladium carbon catalyst is a widely used catalyst at present, but the structure and pretreatment of the support in the palladium carbon catalyst have a great influence on the loading of active components and the catalytic performance of the catalyst. The structure and morphology of palladium carbon catalysts with different supports are different, a...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J37/10B01J37/34B01J37/16B82Y30/00B82Y40/00
CPCB01J23/44B01J35/0033B01J35/0066B01J37/10B01J37/16B01J37/343B82Y30/00B82Y40/00
Inventor 张念椿徐宁尚京旗陈洁伟敖玉银刘平
Owner SOUTH CHINA UNIV OF TECH
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