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Preparation method and application of ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst

A technology of ionic liquid and platinum nanometer, which is applied in the direction of catalyst activation/preparation, catalyst carrier, physical/chemical process catalyst, etc., can solve the problems of few researches on nanoparticles, and achieve the goal of optimizing performance, increasing specific surface area, and improving electrical conductivity Effect

Inactive Publication Date: 2011-06-01
SUZHOU FANGSHENG OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The report of using carbon spheres to directly support platinum (Pt) nanoparticles includes: X.M.Sun and Y.D.Li Angew.Chem.Int.Ed.2004, 43, 597-601, but currently ionic liquids are used to modify carbon spheres to support platinum (Pt) nanoparticles. Particles are still poorly studied

Method used

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  • Preparation method and application of ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst
  • Preparation method and application of ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst
  • Preparation method and application of ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst

Examples

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Embodiment 1

[0041] Embodiment 1: Preparation of carbon sphere supported platinum nanoparticle catalyst

[0042] A preparation method of carbon sphere supported platinum nanoparticle catalyst, comprising the following steps:

[0043] (1) Preparation of carbon spheres

[0044] Fully dissolve 5g of glucose into 100ml of deionized water, put it into a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and react in a vacuum oven at 160°C for 4 to 6 hours to obtain a brown solution. Centrifuge at a speed of 20 minutes, and dry the separated precipitate in a vacuum oven at 60°C. figure 1 Scanning electron microscope (SEM) photos of carbon spheres with a diameter of about 500 nm are prepared.

[0045](2) Synthesis of imidazolium salt ionic liquid

[0046] The ionic liquid of imidazolium salt type is synthesized as follows: its synthetic method reference (Y.J.Zhang, Y.F.Shen, J.H.Yuan, D.X.Han, Z.J.Wang, Q.X.Zhang, L.Niu, Angew.Chem.Int.Ed.2006,45,5867) Add 2.2g of 3-bromo...

Embodiment 2

[0055] Example 2: Application of Ionic Liquid Modified Carbon Spheres Supporting Platinum Nanoparticle Catalysts

[0056] The glassy carbon electrode was modified with the ionic liquid modified carbon spheres supported platinum nanoparticles catalyst obtained in Example 1 above, and a three-electrode system was selected to perform electrocatalysis on methanol. The specific operation steps are as follows: the glassy carbon electrode (3 mm in diameter) is ground into a mirror surface with alumina grinding fluid, then cleaned with ethanol and acetone, and dried under nitrogen atmosphere. Then add 1 mg of the ionic liquid-modified carbon sphere-loaded platinum catalyst obtained in Example 1 into 1 ml of secondary water, disperse it ultrasonically, spread 5 microliters on the surface of the glassy carbon electrode, and wait for it to dry naturally or place it under an infrared lamp. Lower to bake. Then add 10ml of 30mmol / L Nafion ethanol solution dropwise, and dry it naturally or ...

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Abstract

The invention discloses a preparation method of an ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst, and application of the catalyst to methanol electrocatalysis reaction. The method comprises the following steps of: synthesizing carbon spheres and ionic liquid; modifying the carbon spheres by using the ionic liquid; and performing anion exchange on a platinum precursor and the ionic liquid, and reducing platinum on the surfaces of the ionic liquid modified carbon spheres to obtain the ionic liquid modified carbon sphere loaded platinum nanoparticle catalyst. A catalyst modified glassy carbon electrode is taken as a working electrode, and electrochemical reaction is performed in electrolyte solution of sulfuric acid / methanol. The method can effectively prevent platinum nanoparticles from being agglomerated; and due to the introduction of the ionic liquid, the conductivity of the carbon spheres is further improved, specific surface area is increased, capability of resisting carbon monoxide poisoning can be improved, and the performance of a catalyst carrier is optimized.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst with a carbon nanomaterial as a carrier, and an application of the catalyst. Background technique [0002] Platinum catalysts supported on carbon nanomaterials are currently commonly used cathode catalysts in methanol fuel cells (DMFCs). Carbon nanomaterials currently used as catalyst supports include carbon nanotubes, activated carbon, and mesoporous carbon. Articles such as modifying carbon tubes with ionic liquids have been reported (typical literature reports: S.J.Guo, S.J.Dong, and E.K.Wang, Adv.Mater.2009, 21, 1-4; Z.Wang, Q.Zhang, D. Kuehnera, X.Xu, A.Ivaskab, L.Niu, Carbon 2008, 46, 1687-1692; B.Wu, D.Hu, Y.J.Kuang, B.Liu, X.Zhang, J.Chen, Angew.Chem. 2009, 121, 4845-4848; Angew. Chem. Int. Ed. 2009, 48, 4751-4754). The report of using carbon spheres to directly support platinum (Pt) nanoparticles includes: X.M.Sun and Y.D.Li Angew....

Claims

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Application Information

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IPC IPC(8): B01J37/02B01J32/00B01J35/08C01B31/02H01M4/90H01M4/88
CPCY02E60/50
Inventor 康振辉何小蝶刘阳李海涛
Owner SUZHOU FANGSHENG OPTOELECTRONICS CO LTD
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