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Preparation method and product of NiAuPd nano alloy/graphene high-efficiency catalyst

A nano-alloy and graphene technology is applied in the field of preparation of NiAuPd nano-alloy/graphene high-efficiency catalyst to achieve the effects of simple reduction conditions, high yield and short reaction time

Inactive Publication Date: 2015-03-25
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to literature research, it is not difficult to find that three-way catalysts using graphene as a carrier are still rarely reported.

Method used

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  • Preparation method and product of NiAuPd nano alloy/graphene high-efficiency catalyst
  • Preparation method and product of NiAuPd nano alloy/graphene high-efficiency catalyst
  • Preparation method and product of NiAuPd nano alloy/graphene high-efficiency catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]1) Graphene oxide was prepared by the Hummers method. The specific method is: add 1.0 g of dried flake graphite, 1.2 g of potassium nitrate, and 46 ml of concentrated sulfuric acid into a 250 ml four-necked flask, and mix them evenly under the action of ultrasound. , then stirred in an ice-water bath and slowly added 6.0 g of potassium permanganate. Subsequently, the temperature of the reaction system was raised to 40° C., and the reaction was stirred at high speed for 6 hours. Then, while slowly adding 80 milliliters of distilled water, the system was heated up to 70° C. and reacted for half an hour. Add 100 milliliters of distilled water and 6 milliliters of hydrogen peroxide (30% by mass) to the system, stop the reaction after 5 minutes, and obtain a bright yellow graphene oxide mother liquor. The obtained graphene oxide mother liquor is centrifuged at low speed to take the upper layer to remove unoxidized graphite; then centrifuged at high speed to take the lower la...

Embodiment 2

[0031] pH=9, other steps are with embodiment 1. The obtained NiAuPd nano-alloy / graphene high-efficiency catalyst alloy particles have an average particle size of 2.7 nm.

Embodiment 3

[0033] PH=10, other steps are with embodiment 1. The obtained NiAuPd nano-alloy / graphene high-efficiency catalyst alloy particles have an average particle size of 3.5 nm.

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Abstract

The invention discloses a preparation method of a NiAuPd nano alloy / graphene high-efficiency catalyst. The preparation method comprises the following steps: preparing graphene oxide through a Hummers method, adding an appropriate amount of sodium dodecyl benzene sulfonate into the prepared graphene oxide, ultrasonically dispersing to obtain uniformly dispersed graphene oxide gel, adding chloroauric acid, sodium tetrachloropalladate and nickel nitrate into a certain amount of graphene oxide gel in proportion, stirring and dissolving, regulating the pH to be 9-10 by 1 mol / L of sodium hydroxide, and transferring a solution into a hydrothermal reaction kettle for reaction for 5-8 hours at 100-180 DEG C, thereby preparing the NiAuPd nano alloy / graphene high-efficiency catalyst through a one-step hydrothermal process. The preparation method disclosed by the invention is simple in process and equipment; the NiAuPd nano alloy / graphene high-efficiency catalyst is directly prepared by adopting the one-step hydrothermal process; the prepared NiAuPd nano alloy / graphene high-efficiency catalyst has very high catalytic activity, can be applied to the fields of fuel cells, methanol, hydrogen production by formic acid decomposition, energy development and improvement, and the like, and has a very wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection energy chemical industry, and in particular relates to a preparation method of a NiAuPd nano-alloy / graphene high-efficiency catalyst. Background technique [0002] With the rapid development of modern science and technology, people pay more and more attention to the accompanying environmental pollution, resource waste and other issues, and the energy crisis has become one of the important issues of sustainable development. The traditional way of burning fossil fuels not only causes serious environmental pollution and low energy efficiency, but also causes the depletion of non-renewable resources. In order to solve global environmental problems and meet the growing energy demand, research on new energy storage and conversion methods has become an inevitable trend. However, some energy substances are difficult to decompose or undergo chemical reactions to release energy under ordin...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/16B01J37/10
Inventor 欧宝立何聪刘俊成
Owner HUNAN UNIV OF SCI & TECH
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