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Pd/WO3-RGO catalyst used for formic acid oxidation and preparation method thereof

A formic acid oxidation and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high price and poor stability of Pd metal

Inactive Publication Date: 2017-01-04
刘义林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price and poor stability of Pd metal, the preparation of modified Pd catalysts is a research focus.

Method used

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  • Pd/WO3-RGO catalyst used for formic acid oxidation and preparation method thereof
  • Pd/WO3-RGO catalyst used for formic acid oxidation and preparation method thereof
  • Pd/WO3-RGO catalyst used for formic acid oxidation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of graphene oxide

[0036] Graphene oxide was synthesized by liquid phase oxidation by Hummers method. First, place a beaker containing 23 mL of concentrated sulfuric acid in an ice water bath, add 1 g of graphite powder, and sonicate for 20 min (10 min each time) until it is uniform. Then slowly add 3 g of potassium permanganate, stirring constantly in an ice water bath. After 2 h, the ice bath was completed, heated to 40 ℃, reacted for 40 min, and slowly added 50 mL of distilled water. After the end, add to 88 ℃, and continue to stir for 1 h. Add 20 mL of distilled water and 20 mL of 30% H 2 O 2 . Then it was centrifuged while hot, washed with distilled water to neutrality, and dried in a blast drying oven at 70°C.

[0037] 2. Prepare the carrier

[0038] 2.1 Preparation of 30% WO 3 -GO

[0039] Weigh 8.5714 g of AMT, add AMT and 20 mL of distilled water to a 50 mL beaker, and stir continuously to completely dissolve it. Then weigh 100 mg of the graphene ...

Embodiment 2

[0052] 1. Preparation of graphene oxide

[0053] Graphene oxide was synthesized by liquid phase oxidation by Hummers method. First, place a beaker containing 23 mL of concentrated sulfuric acid in an ice water bath, add 1 g of graphite powder, and sonicate for 20 minutes (10 minutes each time) until it is uniform. Then slowly add 3 g of potassium permanganate, stirring constantly in an ice water bath. After 2 h, the ice bath was completed, heated to 40 ℃, reacted for 40 min, and slowly added 50 mL of distilled water. After the end, add to 88 ℃, and continue to stir for 1 h. Add 20 mL of distilled water and 20 mL of 30% H 2 O 2 . Then it was centrifuged while hot, washed with distilled water to neutrality, and dried in a blast drying oven at 70°C.

[0054] 2 Preparation of WO 3 -GO

[0055] Prepare an AMT (ammonium metatungstate) solution with a mass concentration of 20%, and then add 100 mg of the graphene oxide prepared in step 1, and sonicate for 30 min (10 min each time) unti...

Embodiment 3

[0059] 1. Preparation of graphene oxide

[0060] Graphene oxide was synthesized by liquid phase oxidation by Hummers method. First, place a beaker containing 23 mL of concentrated sulfuric acid in an ice water bath, add 1 g of graphite powder, and sonicate for 20 minutes (10 minutes each time) until it is uniform. Then slowly add 3 g of potassium permanganate, stirring constantly in an ice water bath. After 2 h, the ice bath was completed, heated to 40 ℃, reacted for 40 min, and slowly added 50 mL of distilled water. After the end, add to 88 ℃, and continue to stir for 1 h. Add 20 mL of distilled water and 20 mL of 30% H 2 O 2 . Then it was centrifuged while hot, washed with distilled water to neutrality, and dried in a blast drying oven at 70°C.

[0061] 2 Preparation of WO 3 -GO

[0062] Prepare an AMT (ammonium metatungstate) solution with a mass concentration of 10%, then add 100 mg of the graphene oxide prepared in step 1, and sonicate for 30 min (10 min each time) until it...

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Abstract

The invention relates to a catalyst and in particular relates to a Pd / WO3-RGO catalyst used for formic acid oxidation and a preparation method thereof. The Pd / WO3-RGO catalyst used for formic acid oxidation is prepared by dipping graphene oxide in a 10-30wt% AMT (ammonium metatungstate) solution, obtaining a WO3-GO carrier through hydrothermal synthesis treatment and then synthesizing the Pd-supported catalyst by a potassium borohydride reduction method. The Pd / WO3-RGO catalyst and the preparation method have the beneficial effects that the electrochemical properties, X-ray diffraction and scanning electron microscopes of catalysts are represented and the effects of carriers on the properties of the composite catalyst and comparison of the formic acid oxidation electrocatalysis properties of the catalysts are studied; the results show that the Pd / WO3-RGO catalyst has the best electrochemical property and stability and the catalyst with graphene as the carrier has better properties than carbon nanotubes.

Description

Technical field [0001] The present invention relates to a catalyst, in particular to a Pd / WO for formic acid oxidation 3 -RGO catalyst and its preparation method. Background technique [0002] In today's society, due to the destruction of the ecological environment and serious environmental pollution, research and development of new energy has become a serious issue facing humanity today. In order to be able to effectively solve this problem, the use of clean renewable energy is the only choice, among which fuel cells are the most prominent. Fuel cells can efficiently convert chemical energy into electrical energy. They have the characteristics of high specific energy, low environmental damage, long service life, simple composition, and easy handling. They can exert greater potential in portable power supplies and electric vehicles. Become a research hotspot today. [0003] The direct formic acid fuel cell has more advantages: 1) formic acid is non-toxic, has a high ignition poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652H01M4/92
CPCH01M4/926B01J23/6527B01J35/33Y02E60/50
Inventor 刘义林
Owner 刘义林
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