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Pt/C catalyst and preparation method thereof

A catalyst and Pt technology, applied in the field of Pt/C catalyst and its preparation, can solve the problems of complex process, long production cycle, complicated operation, etc., and achieve the effect of simple and reliable process, high utilization rate of raw materials, and uniformity

Active Publication Date: 2019-10-15
HUNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, this type of method has disadvantages such as relatively complicated process, poor catalyst repeatability, and uneven distribution of catalyst active component particles on the carrier; on the other hand, this type of method is complicated to operate and has a long production cycle. Difficult to achieve large-scale mass production

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  • Pt/C catalyst and preparation method thereof
  • Pt/C catalyst and preparation method thereof
  • Pt/C catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of Pt / C catalyst of the present invention, comprises the following steps:

[0034] (1) Taking 200 parts by weight of carbon nanotubes with an outer diameter of 20-40nm and treating them with oxygen plasma for 30 minutes (the oxygen flow rate is 5 sccm, and the power is 200W) to obtain pretreated carbon nanotubes;

[0035] (2) Take 100 parts by weight of pretreated carbon nanotubes and disperse them in 400 parts by weight of polydiallyl dimethyl ammonium chloride and sodium chloride aqueous solution (wherein polydiallyl dimethyl ammonium chloride The molecular weight is 100000-200000, and its mass percent composition is 0.05wt%, and the mass percent composition of sodium chloride is 0.10wt%), ultrasonic dispersion 60min, stir 12h with magnetic stirrer, then use in glass sand core funnel Repeated washing with deionized water for 6 times, and finally drying in a vacuum oven at 60°C for 12 hours to obtain functionalized carbon nanotubes for use;...

Embodiment 2

[0040] A kind of preparation method of Pt / C catalyst of the present invention, comprises the following steps:

[0041] (1) Taking 200 parts by weight of carbon nanotubes with an outer diameter of 60-100nm and treating them with oxygen plasma for 20 minutes (oxygen flow rate is 8 sccm, power is 250W) to obtain pretreated carbon nanotubes;

[0042] (2) Take 100 parts by weight of pretreated carbon nanotubes and disperse them in 400 parts by weight of polydiallyl dimethyl ammonium chloride and sodium chloride aqueous solution (wherein polydiallyl dimethyl ammonium chloride The molecular weight is 100000-200000, and the mass percent composition is 0.06wt%, and the mass percent composition of sodium chloride is 0.07wt%), ultrasonic dispersion 60min, stir 12h with magnetic stirrer, use up in the funnel of glass sand core then Repeated washing with ionic water for 7 times, and finally drying in a vacuum oven at 60°C for 12 hours to obtain functionalized carbon nanotubes, ready for us...

Embodiment 3

[0046] A kind of preparation method of Pt / C catalyst of the present invention, comprises the following steps:

[0047] (1) Taking 200 parts by weight of carbon nanotubes with an outer diameter of 40-60nm and treating them with oxygen plasma for 40min (oxygen flow rate is 7 sccm, power is 150W) to obtain pretreated carbon nanotubes;

[0048] (2) Take 100 parts by weight of pretreated carbon nanotubes and disperse them in 400 parts by weight of polydiallyl dimethyl ammonium chloride and sodium chloride aqueous solution (wherein polydiallyl dimethyl ammonium chloride The molecular weight is 100000-200000, and the mass percent composition is 0.07wt%, and the mass percent composition of sodium chloride is 0.09wt%), ultrasonic dispersion 60min, stir 12h with magnetic stirrer, use up in the funnel of glass sand core then Repeated washing with ionic water for 9 times, and finally put it into a vacuum drying oven at 60°C for 12 hours to obtain functionalized carbon nanotubes, which are...

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Abstract

The invention discloses a Pt / C catalyst and a preparation method thereof. The preparation method comprises the following steps: performing plasma treatment on carbon nanotubes so as to obtain pretreated carbon nanotubes; dispersing the obtained pretreated carbon nanotubes into an aqueous solution of polydiallyl dimethylammonium chloride and sodium chloride, performing ultrasonic dispersion, uniformly stirring and mixing, washing with deionized water, and performing drying so as to obtain functionalized carbon nanotubes; adding the functionalized carbon nanotubes into a dispersing agent so as to obtain carbon nanotube dispersion, performing ultrasonic dispersion, adding chloroplatinic acid, and performing ultrasonic dispersion again so as to obtain spray pyrolysis precursor dispersion; atomizing the obtained spray pyrolysis precursor dispersion, and transporting the precursor dispersion to a pyrolyzing furnace via carrier gas for performing thermal decomposition, thereby obtaining the Pt / C catalyst powder. The preparation merthod is high in process stability and repeatability, simple in operation and capable of realizing automatic continuous large-scale production, and the preparedcatalyst is uniform in distribution of active ingredient particles.

Description

technical field [0001] The invention relates to the technical field of catalytic synthesis, in particular to a Pt / C catalyst and a preparation method thereof. Background technique [0002] Platinum-carbon catalyst (Pt / C) is a catalyst that loads platinum on a carbon carrier, and has been widely used in proton exchange membrane fuel cells, direct alcohol fuel cells, hydrogen production by electrolysis of water, and catalytic addition of various compounds. / dehydrogenation reaction and other fields. [0003] At present, the most effective and commonly used catalyst in the above fields is still the Pt / C catalyst, and its preparation methods mainly include traditional chemical reduction method, precipitation transformation method, microwave method, etc. On the one hand, this type of method has disadvantages such as relatively complicated process, poor catalyst repeatability, and uneven distribution of catalyst active component particles on the carrier; on the other hand, this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J21/18B01J37/34B01J37/08
CPCB01J21/185B01J23/42B01J37/082B01J37/088B01J37/349
Inventor 王双印王东东黄根王燕勇邹雨芹
Owner HUNAN UNIV