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Transition metal doped anode catalyst as well as preparation method and application thereof

A transition metal and catalyst technology, which is applied in the field of transition metal-doped anode catalysts and their preparation, can solve the problems of decreased catalyst activity, non-corrosion-resistant carbon support materials, and the inability of commercial platinum carbon to meet large-scale commercial promotion.

Inactive Publication Date: 2020-11-27
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the most effective methanol anode catalyst is still platinum, the precious metal platinum is expensive and its reserves are scarce
The currently used commercial platinum-carbon catalysts have poor activity, and the utilization efficiency of metal platinum is low. In the actual work process, it is easy to combine with intermediate species, resulting in a decrease in catalyst activity. At the same time, the non-corrosion resistance of carbon support materials will further reduce its stability. This series of reasons determines that commercial platinum carbon is far from meeting the conditions for large-scale commercial promotion.

Method used

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  • Transition metal doped anode catalyst as well as preparation method and application thereof
  • Transition metal doped anode catalyst as well as preparation method and application thereof
  • Transition metal doped anode catalyst as well as preparation method and application thereof

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preparation example Construction

[0037] The invention provides a method for preparing a transition metal-doped anode catalyst, comprising the following steps:

[0038] Treating carbon nanotubes with acetone and sulfuric acid to obtain pretreated carbon nanotubes;

[0039] Alcohol solvent, tetra-n-butyl titanate, stabilizer, acetate metal salt and pretreated carbon nanotubes were mixed under organic acid conditions, heated to obtain a precursor, and then calcined in an ammonia atmosphere to obtain TiMN / NCNTs, M is a transition metal;

[0040] Platinum is deposited on the TiMN / NCNTs by pulse electrodeposition to obtain TiMN@Pt / NCNTs.

[0041] The invention treats carbon nanotubes with acetone and sulfuric acid to obtain pretreated carbon nanotubes. In the invention, acidified carbon nanotubes are obtained after the carbon nanotubes are treated with acetone and sulfuric acid. The carbon nanotubes may be single-walled carbon nanotubes or multi-walled carbon nanotubes. The diameter of the carbon nanotube is 10...

Embodiment 1

[0070] (1) Pretreatment of carbon nanotubes:

[0071] 600 mg of multi-walled carbon nanotubes were put into a beaker, soaked in 200 ml of acetone, and stirred at room temperature for 12 hours. The above solution was washed and filtered with deionized water, and dried in a vacuum oven at 60°C. Put the dried carbon nanotubes into 6mol·L -1 The sulfuric acid solution was stirred in an oil bath at 80°C for 10 hours. Finally, it was filtered and washed with deionized water until neutral, and dried in a vacuum oven at 60°C.

[0072] (2) Preparation method of TiMN / NCNTs:

[0073] 50 mg of pretreated carbon nanotubes were added to 30 ml of absolute ethanol, stirred for 20 minutes, ultrasonicated for 20 minutes, a mixed solution of 5 ml of deionized water and 4.5 ml of benzyl alcohol was added dropwise, and stirred for 20 minutes. While maintaining stirring, slowly add 20 ml of absolute ethanol, 10 ml of glacial acetic acid, 15 μl of a mixed solution of tetra-n-butyl titanate and ma...

Embodiment 2

[0079] The difference from Example 1 is that copper acetate is used.

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Abstract

The invention provides a transition metal doped anode catalyst as well as a preparation method and application thereof. The method comprises the following steps: treating carbon nanotubes with acetoneand sulfuric acid to obtain pretreated carbon nanotubes; mixing an alcohol solvent, tetra-n-butyl titanate, a stabilizer, metal acetate and the pretreated carbon nanotube under an organic acid condition, heating to obtain a precursor, and roasting in an ammonia atmosphere to obtain TiMN / NCNTs, wherein M is a transition metal; depositing platinum on the TiMN / NCNTs by adopting a pulse electro-deposition method to obtain the TiMN-coated Pt / NCNTs. According to the anode catalyst prepared by the method, titanium nitride doped with transition metal is used as a core; a layer of platinum is deposited on titanium nitride doped with transition metal through a pulse electro-deposition method, the transition metal is introduced into the titanium nitride to adjust the surface electronic structure ofthe titanium nitride, the synergistic effect between the platinum and a nitride core is enhanced, and the catalytic performance is improved. Good stability and anti-poisoning capability are also realized.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a transition metal-doped anode catalyst and a preparation method and application thereof. Background technique [0002] Direct methanol fuel cell is an ideal power source for portable mobile devices and new energy electric vehicles due to its advantages of low operating temperature, high energy density, easy access to fuel and easy storage, and no hazardous waste emissions. It is expected to make significant progress in practical applications in the future . A direct methanol fuel cell is an electrochemical power generation device that converts chemical energy stored in methanol into electrical energy. The methanol oxidation efficiency on the anode determines the performance and cost of the entire battery to a certain extent. [0003] Platinum is still the most effective methanol anode catalyst at this stage. The price of precious metal platinum is high a...

Claims

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Application Information

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IPC IPC(8): H01M4/92H01M4/88H01M8/1011B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/8803H01M4/925H01M4/926H01M8/1011Y02E60/50Y02P70/50
Inventor 郑育英袁泽宇张健何佩珊党岱刘全兵郑佳张晓珊周苑红
Owner GUANGDONG UNIV OF TECH
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