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Hydrogen oxidation reaction catalyst for alkaline medium and synthesis method thereof

A technology of oxidation reaction and alkaline medium, applied in the direction of nanotechnology, structural parts, electrical components, etc. for materials and surface science, can solve the problems of low activity and expensive Pt-based catalysts, and achieve the goal of improving electrocatalytic performance Effect

Active Publication Date: 2020-04-10
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a composite catalyst for hydrogen oxidation in alkaline medium and its preparation method, which solves the problems of high price and low activity of Pt-based catalysts

Method used

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  • Hydrogen oxidation reaction catalyst for alkaline medium and synthesis method thereof
  • Hydrogen oxidation reaction catalyst for alkaline medium and synthesis method thereof
  • Hydrogen oxidation reaction catalyst for alkaline medium and synthesis method thereof

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preparation example Construction

[0046] The invention provides a method for synthesizing a supported nanometer metal catalyst for hydrogen oxidation in an alkaline medium, comprising the following steps:

[0047] Dissolving the ruthenium source and the nickel source into oleylamine and toluene to form a first precursor solution;

[0048] adding a reducing agent to the first precursor to form a uniform first reaction solution;

[0049] heating the uniform first reaction solution to the first reaction temperature and maintaining it for a period of time to form a second reaction solution;

[0050] Separating and purifying the above second reaction solution to obtain bimetallic nanoparticles.

[0051] In some embodiments, the ruthenium source is ruthenium acetylacetonate, and the nickel source is nickel acetylacetonate.

[0052]In some embodiments, the first precursor solution, the first reaction solution, and the second reaction solution are all formed in a closed environment.

[0053] In some embodiments, th...

Embodiment 1

[0067] Bimetallic nanoparticles with a ruthenium-nickel ratio of 1:9 (Ru 1 Ni 9 / C) preparation method, experimental procedure is as follows:

[0068] 1. Take 3.18mg Ru(acac) 3 and 18.51mg Ni(acac) 2 The precursor was dissolved in a mixed solution of 6mL oleylamine and 2mL toluene, then the mixed solution was stirred and ultrasonicated for 30min, 25.06mg of p-dimethylaminobenzaldehyde was added, and then stirred and ultrasonically continued for 30min, the mixed solution was poured into 10mL of high temperature resistant poly Put the inner liner in a tetrafluoroethylene liner, then put the liner into a stainless steel reactor, and finally put the reactor into an oven, and react at 200°C for 12 hours.

[0069] 2. After the reaction in step 1 is over, pour the reaction solvent containing nanoparticles obtained in the liner into the centrifuge tube, then add absolute ethanol to wash, centrifuge at 11000rpm for 5min, and then pour off the supernatant , the process was repeated ...

Embodiment 2

[0073] Bimetallic nanoparticles with a ruthenium-nickel ratio of 5:5 (Ru 5 Ni 5 / C) preparation method, experimental procedure is as follows:

[0074] 1. Take 16mg Ru(acac) 3 and 10.28mg Ni(acac) 2 Dissolve in 6mL oleylamine and 2mL toluene solution, stir the mixed solution for 30min, then add 30mg p-dimethylaminobenzaldehyde, then continue stirring and ultrasonic for 30min, then add the mixed solution into 10mL high temperature resistant polytetrafluoroethylene liner , and then put the liner into a stainless steel reactor, and finally put the reactor into an oven, and react at 220° C. for 12 hours.

[0075] 2. The reaction solvent containing nanoparticles obtained in step 1 was poured into 50 mL of absolute ethanol solution, and then centrifuged with a centrifuge at a speed of 11000 rpm for 5 min. This process was repeated three times. Finally the nanoparticles were redispersed in 50 mL cyclohexane.

[0076] 3. Take by weighing 14.9mg active carbon powder (Vulcan XC-72),...

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Abstract

The invention relates to a supported nano-metal catalyst for hydrogen oxidation reaction in an alkaline medium and a synthesis method thereof. The catalyst is a ruthenium-nickel bimetallic catalyst. According to the method, oleylamine and methylbenzene are used as solvents, p-dimethylaminobenzaldehyde is used as a reducing agent, and a series of nano particles with the Ru:Ni feeding ratio rangingfrom 1:9 to 9:1 are prepared respectively. The nanoparticles are loaded on activated carbon to prepare a corresponding carbon-loaded bimetallic nano catalyst, and then the performance of the catalystas a hydrogen oxidation electrocatalyst is researched, and the catalyst is found to obtain very good catalytic activity in an alkaline membrane fuel cell.

Description

technical field [0001] The invention relates to the technical field of preparation of electrocatalysts for hydrogen oxidation reactions, in particular to a bimetallic catalyst for anodic hydrogen oxidation reactions in alkaline media and a preparation method thereof. Background technique [0002] At present, due to the excessive use of traditional fossil energy, the earth's environment has suffered unprecedented pollution. In order to meet human energy needs while protecting the environment, various countries have set off an upsurge in research on new energy, such as solar energy, wind energy, geothermal energy and tides. Energy, etc. Hydrogen energy is one of many new energy sources. It has attracted people's attention because of its large calorific value, high energy and no pollution to the environment. At present, hydrogen energy is the most researched in hydrogen fuel cells. Hydrogen fuel cells are a kind of device that uses hydrogen as fuel and oxygen or air as oxidant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/92H01M4/88B82Y30/00
CPCB82Y30/00H01M4/8825H01M4/9016H01M4/9041H01M4/9083H01M4/921H01M4/926Y02E60/50
Inventor 庄仲滨薛延荣朱威
Owner BEIJING UNIV OF CHEM TECH
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