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Palladium metal nanoparticle catalytic material for methanol, ethanol and isopropanol fuel batteries as well as preparation method and application of catalytic material

A technology of metal nanoparticles and catalytic materials, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, battery electrodes, etc. The effect of catalytic activity, high catalytic activity, mild synthesis process conditions

Inactive Publication Date: 2013-02-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, palladium nanomaterials are prone to agglomeration, which reduces their catalytic activity

Method used

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  • Palladium metal nanoparticle catalytic material for methanol, ethanol and isopropanol fuel batteries as well as preparation method and application of catalytic material
  • Palladium metal nanoparticle catalytic material for methanol, ethanol and isopropanol fuel batteries as well as preparation method and application of catalytic material
  • Palladium metal nanoparticle catalytic material for methanol, ethanol and isopropanol fuel batteries as well as preparation method and application of catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Palladium / TiO2-Carbon Nanotubes (Pd / TiO 2 -CNTs) Preparation of composite nanoparticle catalytic materials:

[0046] 1) Preparation of modified carbon nanotube materials:

[0047] 1.1) Prepare a mixed solution of concentrated nitric acid and concentrated sulfuric acid, where the volume ratio of nitric acid and sulfuric acid is 1:2.5;

[0048] 1.2) Take an appropriate amount of carbon nanotubes and add them to the solution in step 1.1) to make an acid mixed solution with a solid-to-liquid ratio of 5 grams per liter, and stir for 8 hours at 70°C;

[0049] 1.3) Wash the carbon nanotube mixed solution obtained in step 1.2) several times with suction, ultrasonication, and water washing until the filtrate is neutral;

[0050] 1.4) Dissolving the carbon nanotubes washed in step 1.3) in water to prepare a modified carbon nanotube solution, the solid-to-liquid ratio of which is 1 gram per liter of water;

[0051] 2) Pretreatment of titanium dioxide:

[0052] 2.1) Grindin...

Embodiment 2

[0070] Palladium / TiO2-Carbon Nanotubes (Pd / TiO 2 -CNTs) Preparation of composite nanoparticle catalytic materials:

[0071] 1) Preparation of modified carbon nanotube materials:

[0072] 1.1) Prepare a mixed solution of concentrated nitric acid and concentrated sulfuric acid, where the volume ratio of nitric acid and sulfuric acid is 1:3;

[0073] 1.2) Take an appropriate amount of carbon nanotubes and add them to the solution in step 1.1) to make an acid mixed solution with a solid-to-liquid ratio of 8 grams per liter, and stir for 9 hours under the condition of 80°;

[0074] 1.3) Wash the mixed solution of carbon nanotubes obtained in step 2) several times by means of suction filtration, ultrasonication, and water washing until the filtrate is neutral;

[0075] 1.4) Dissolving the carbon nanotubes washed in step 3) in water to prepare a modified carbon nanotube solution, the solid-to-liquid ratio of which is 1.5 grams per liter of water;

[0076] 2) Pretreatment of titani...

Embodiment 3

[0095] Palladium / TiO2-Carbon Nanotubes (Pd / TiO 2 -CNTs) Preparation of composite nanoparticle catalytic materials:

[0096] 1) Preparation of modified carbon nanotube materials:

[0097] 1.1) Prepare a mixed solution of concentrated nitric acid and concentrated sulfuric acid, where the volume ratio of nitric acid and sulfuric acid is 1:3;

[0098] 1.2) Take an appropriate amount of carbon nanotubes and add them to the solution in step 1.1) to make an acid mixed solution with a solid-to-liquid ratio of 10 grams per liter, and stir for 10 hours at 90°C;

[0099] 1.3) Wash the carbon nanotube mixed solution obtained in step 1.2) several times with suction, ultrasonication, and water washing until the filtrate is neutral;

[0100] 1.4) Dissolving the carbon nanotubes washed in step 1.3) in water to prepare a modified carbon nanotube solution with a solid-to-liquid ratio of 2 grams per liter of water;

[0101] 2) Pretreatment of titanium dioxide:

[0102] 2.1) Grinding the ...

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Abstract

The invention discloses a palladium metal nanoparticle catalytic material for methanol, ethanol and isopropanol fuel batteries under the alkali condition as well as a preparation method and application of the catalytic material. According to the material, a multi-walled carbon nanotube is used as a substrate, titanium dioxide is used as an intermediate carrier and 5-8nm palladium metal particles are evenly distributed on the surfaces of titanium dioxide particles. The preparation method comprises the steps of; preprocessing titanium dioxide and carbon nanotube and synthesizing titanium dioxide and carbon nanotube by using an in situ synthesis method to obtain a titanium dioxide-carbon nanotube composite carrier material; and dispersing the composite material in aqueous solution of palladium chloride, adding a reducing agent sodium borohydride, evenly loading the palladium nanoparticles on the composite carrier so as to obtain a modified palladium / titanium dioxide-carbon nanotube catalytic material. The palladium metal nanoparticle catalytic material has high catalytic activity, high stability and high poison resistance under alkali condition and is capable of effectively reducing the catalyst poisoning. According to the invention, the process condition is mild, the process is simple, and the stability and the repeatability of the catalytic material are relatively good.

Description

[0001] Technical field [0002] The present invention is a modified preparation technology for nanomaterials and the field of fuel cell catalysts. It is specifically a tadpole metal nanoparticle / titanium dioxide-carbon nanotuba (PD / TIO (PD / TIO 2 -CNTS) Preparation and application of catalytic materials. Background technique [0003] In recent years, alkaline fuel batteries, such as direct methanol fuel cells, direct ethanol fuel cells, and direct isopropanol fuel cells, have received widespread theoretical research and experimental applications.And some direct fuel cells, such as direct methanol fuel cells, have entered a preliminary marketization research.However, the low catalytic activity and anti -poisoning of electrode materials are still difficulties that need to be overcome in this field.To solve this problem, precious metal materials are widely used in the field of fuel cell research, of which platinum and 钯 are the most typical.However, platinum, as a catalytic material,...

Claims

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Application Information

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IPC IPC(8): H01M4/92B01J23/44
CPCY02E60/50
Inventor 李琴周丹丹潘林娜崔皓安浩翟建平
Owner NANJING UNIV