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Carbon loaded palladium oxide nano cluster catalyst as well as preparation method and application thereof

A technology of nano-clusters and palladium oxide, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Low catalyst activity and other problems, achieve excellent activity and stability, promote catalytic performance, and simple preparation method

Inactive Publication Date: 2018-12-28
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of low activity and poor stability of the catalyst used in the prior art to decompose formic acid to produce hydrogen, and the preparation method of the catalyst is complicated and cannot be mass-produced, and to provide a carbon-supported palladium oxide nanocluster Cluster catalyst and its preparation method and application

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  • Carbon loaded palladium oxide nano cluster catalyst as well as preparation method and application thereof
  • Carbon loaded palladium oxide nano cluster catalyst as well as preparation method and application thereof
  • Carbon loaded palladium oxide nano cluster catalyst as well as preparation method and application thereof

Examples

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preparation example Construction

[0028] The preparation method of carbon-supported palladium oxide nano-cluster catalyst, the steps are as follows:

[0029] Step 1: At room temperature, the porous carbon is uniformly dispersed in water to obtain a first suspension;

[0030] Among them, the porous carbon is preferably activated carbon, more preferably Vulcan XC-72 type activated carbon; the porous carbon is uniformly dispersed in water by: first mixing the porous carbon and water, and then ultrasonically dispersing the porous carbon uniformly; the ratio of porous carbon and water There is no particular limitation, as long as the porous carbon can be uniformly dispersed, the preferred ratio of the porous carbon to water is (0.1-0.3 g):(100-300 mL).

[0031] Step 2, adding the Pd(II) precursor dropwise to the first suspension, stirring for 4-6 hours, so that the Pd(II) precursor is fully adsorbed on the surface of the porous carbon to obtain the second suspension;

[0032] Among them, the Pd(II) precursor is pr...

Embodiment 1

[0043] At room temperature, add 0.3 g of Vulcan XC-72 activated carbon to 300 mL of water, and sonicate to make the activated carbon dispersed evenly to obtain the first suspension; add 0.2 g of H 2 PdCl 4 Add dropwise to the first suspension, stir for 4h, make H 2 PdCl 4 Fully adsorb on the surface of activated carbon to obtain a second suspension; adjust the pH of the second suspension to 11 with NaOH solution, stir at room temperature for 8 hours to obtain a third suspension, filter the third suspension, wash with water and drying to obtain a carbon-supported palladium oxide nano-cluster catalyst.

[0044] The carbon-supported palladium oxide nanocluster catalyst of Example 1 is observed by transmission electron microscope, and its particle size distribution is analyzed, and the results are as follows figure 1 shown, from figure 1 It can be seen that the palladium oxide nanoclusters of the catalyst of Example 1 are uniformly dispersed, and the particle size thereof is 0...

Embodiment 2

[0047] At room temperature, add 0.3 g of Vulcan XC-72 activated carbon to 150 mL of water, and sonicate to make the activated carbon dispersed evenly to obtain the first suspension; add 0.1 g of H 2 PdCl 4 Add dropwise to the first suspension, stir for 5h, make H 2 PdCl 4 Fully adsorb on the surface of activated carbon to obtain a second suspension; adjust the pH of the second suspension to 11.5 with KOH solution, and stir at room temperature for 10 hours to obtain a third suspension; filter and wash the third suspension with water and drying to obtain a carbon-supported palladium oxide nano-cluster catalyst.

[0048] The carbon-supported palladium oxide nanocluster catalyst of Example 2 was observed by transmission electron microscope, and its particle size distribution was analyzed, and the results were similar to those of Example 1. X-ray analysis was performed on the carbon-supported palladium oxide nanocluster catalyst of Example 2, and the results were similar to thos...

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Abstract

The invention discloses a carbon loaded palladium oxide nano cluster catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts and preparation thereof. The invention solves the technical problems of low activity, poor stability, complex preparation method and no possibility of batch production for the catalyst for preparing hydrogen by decomposing formic acid in the prior art. The preparation method comprises the following steps: firstly, uniformly dispersing porous carbon in water at room temperature to obtain first suspension; then dropwise adding a Pd(II) precursor into the first suspension and stirring for 4 to 6 hours to obtain second suspension; finally, adjusting the pH value of the second suspension to 10 to 12 by using alkaline liquor and stirring for 4 to 12 hours to obtain third suspension; carrying out suction filtration, washing and drying to obtain the catalyst. The preparation method has the advantages of simplicity, economy, environment friendliness and suitability for large-scale industrial production; in addition, the prepared catalyst has the advantages of particle shape, good stability, good dispersity, high decomposition rate of catalyzing the formic acid and capability of showing excellent activity and stability on preparation of the hydrogen through the decomposition of the formic acid.

Description

technical field [0001] The invention belongs to the technical field of catalysts and preparations thereof, and in particular relates to a carbon-supported palladium oxide nano-cluster catalyst and a preparation method and application thereof. The carbon-supported palladium oxide nano-cluster catalyst is especially suitable for the decomposition of formic acid to produce hydrogen. Background technique [0002] With the increasing demand for clean energy, the depletion of fossil resources year by year and the increasing environmental pollution caused by fossil energy, researchers have aroused the research interest in sustainable clean energy development. Hydrogen energy is considered as a potential energy alternative to fossil fuels. It is not only renewable, but also completely green and environmentally friendly. The majority of researchers have focused on the research and application of hydrogen energy. However, the development of hydrogen energy economy is severely restrict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J37/02B82Y30/00B82Y40/00C01B3/22
CPCB01J23/44B01J37/0201B82Y30/00B82Y40/00C01B3/22C01B2203/0277C01B2203/10C01B2203/1064C01B2203/1211
Inventor 邢巍王显孟庆磊吕青葛君杰刘长鹏李晨阳
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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