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Low-platinum composite material based on tungsten oxide/graphene aerogel as well as preparation method and application of low-platinum composite material

A technology of graphene airgel and composite materials, which is applied in the field of low-platinum composite materials and its preparation, can solve the problems of low electrical conductivity and application limitations, and achieve the effects of improved catalytic activity, low loading capacity and short reaction cycle

Active Publication Date: 2021-08-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN111111658A discloses a single-atom Pt-supported tungsten oxide single-layer nanosheet catalyst with ultra-high catalytic activity, in which single-atom Pt is uniformly dispersed on the tungsten oxide single-layer nanosheet to form a single-layer nanosheet as an electrocatalytic hydrogen evolution catalyst. However, the single tungsten oxide carrier-supported Pt catalyst has a short board of low conductivity, which limits its application.

Method used

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  • Low-platinum composite material based on tungsten oxide/graphene aerogel as well as preparation method and application of low-platinum composite material
  • Low-platinum composite material based on tungsten oxide/graphene aerogel as well as preparation method and application of low-platinum composite material
  • Low-platinum composite material based on tungsten oxide/graphene aerogel as well as preparation method and application of low-platinum composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A method for preparing a low-platinum composite material based on tungsten oxide / graphene airgel, comprising the steps of:

[0061] S1. Synthesis of uniform graphene oxide tert-butanol dispersion:

[0062] Synthesize a graphene oxide aqueous dispersion of about 13mg / mL, take 10mL and add an equal volume of tert-butanol to centrifuge, repeat 3 times, and ultrasonically homogenize to obtain a graphene oxide tert-butanol dispersion;

[0063] S2. One-step synthesis of porous three-dimensional tungsten oxide / graphene hydrogel:

[0064] Take the above graphene oxide dispersion, prepare 10mL of 5mg / mL graphene tert-butanol dispersion with 5mg / mL tungsten chloride tert-butanol solution, add 6mL of 7mg / mL tungsten chloride tert-butanol solution, stir well, put the precursor reaction solution in a pot In a polytetrafluoroethylene-lined hydrothermal reactor, heat it to 180°C for 16 hours, and wait for it to cool naturally to obtain a three-dimensional porous tungsten oxide / graphe...

Embodiment 2

[0068] This embodiment is based on the preparation method of the low-platinum composite material of tungsten oxide / graphene airgel, other conditions are the same as embodiment 1, the difference is:

[0069] The graphene aqueous solution is replaced by ethanol with graphene ethanol solution, the solvent of the tungsten chloride precursor solution is replaced with ethanol, and the precursor reaction solution is put into a polytetrafluoroethylene-lined hydrothermal reaction kettle in one pot.

Embodiment 3

[0071] This example is based on the preparation method of a low-platinum composite material of tungsten oxide / graphene airgel, and other conditions are the same as Example 1, except that the hydrothermal reaction temperature is 200° C. for 16 hours.

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Abstract

The invention discloses a low-platinum composite material based on tungsten oxide / graphene aerogel and a preparation method and application thereof. The preparation method comprises the steps: synthesizing tungsten oxide / graphene hydrogel through a simple and easy one-step hydrothermal gel forming method, and obtaining the tungsten oxide / graphene aerogel after freeze drying; according to the method, uniformly dispersed tungsten oxide nanowires and graphene aerogel with a hierarchical pore structure are combined to form an electrocatalyst composite substrate with the hierarchical pore structure, the electrocatalyst composite substrate serving as a carrier can further improve the stability of the catalyst, low-content platinum is loaded finally, the reaction process is simple, reaction steps are few, the reaction period is short and repeatability is good; the prepared tungsten oxide / graphene aerogel-based low-platinum composite material is high in unit mass activity in an electro-catalytic reaction, has high catalytic stability and fast mass transfer characteristics, and can be widely applied to electro-catalysis, electrochemical sensing or water pollutant treatment materials.

Description

technical field [0001] The invention relates to the technical field of material chemistry, more specifically, to a low-platinum composite material based on tungsten oxide / graphene airgel and its preparation method and application. Background technique [0002] With the development of society, people's demand for energy is increasing, and energy mainly comes from the consumption of fossil fuels. However, fossil fuel is a non-renewable resource with limited reserves, and its use will have a certain impact on the environment. Therefore, it is urgent to find a clean energy that can replace fossil fuels. Among various clean energy sources, hydrogen has attracted extensive attention due to its high energy density and non-polluting characteristics of combustion products. Producing hydrogen from electricity generated by wind, solar or water conservancy is one way to efficiently store energy without producing carbon dioxide and toxic gases. In recent years, with the continuous upgr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/093C25B1/04C02F1/461
CPCC25B1/04C02F1/46104Y02P20/133
Inventor 刘卫李怡杨静王红蕾孙玉静郑治坤
Owner SUN YAT SEN UNIV
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