Cobalt-based complex catalyst for direct methanol fuel cell anode, and preparation method thereof

A methanol fuel cell and composite technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of affecting the electrochemical performance of methanol oxidation, restricting wide application, expensive raw materials, etc., and achieve excellent electrochemical reactivity , Obvious catalytic effect, the effect of improving catalytic activity

Active Publication Date: 2020-12-29
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of traditional cobalt-based catalysts is complicated, the raw materials are expensive, and the active compon

Method used

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  • Cobalt-based complex catalyst for direct methanol fuel cell anode, and preparation method thereof
  • Cobalt-based complex catalyst for direct methanol fuel cell anode, and preparation method thereof
  • Cobalt-based complex catalyst for direct methanol fuel cell anode, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.0303g (0.175mmol) of triaminophenyl borate hydrochloride (ABA), and dissolve it in 835µL of 6mol / L hydrochloric acid solution to prepare an ABA solution.

[0031]Add the above-mentioned ABA solution, 0.233g (2.5mmol) aniline (AN) and 62µL deionized water to 2mL of 10wt% polyvinyl alcohol (PVA) solution in sequence, stir for 30min under heating in a water bath at 55°C, until the solution is clear, place on ice In a water bath, cool to 0°C, add 1.375mL 2mol / L ammonium persulfate (APS) solution dropwise, stir quickly and evenly, pour it into a mold, and polymerize at room temperature for 12 hours to prepare polyvinyl alcohol-polyaniline conductive hydrogel Polymer film PPH.

[0032] Soak PPH in 1mol / L ammonia water until the film turns dark purple, take it out and wash it with deionized water, soak it in 1mol / L cobalt chloride solution for 24 hours, take it out and wash it with deionized water, Freeze-dried for 10 h, placed in a tube reactor, under N 2 Under the ...

Embodiment 2

[0036] Weigh 0.0243g (0.14mmol) of triaminophenyl borate hydrochloride (ABA), and dissolve it in 835µL of 6mol / L hydrochloric acid solution to prepare an ABA solution.

[0037] Add the above-mentioned ABA solution, 0.175g (1.9mmol) aniline (AN) and 62µL deionized water to 2mL 10wt% polyvinyl alcohol (PVA) solution in turn, stir for 30min under heating in a water bath at 55°C, until the solution is clear, place on ice In a water bath, cool to 0°C, add 1.5mL 2mol / L ammonium persulfate (APS) solution dropwise, stir quickly and evenly, pour into a mold, and polymerize at room temperature for 12 hours to prepare polyvinyl alcohol-polyaniline conductive hydrogel Polymer film PPH.

[0038] Soak PPH in 2mol / L ammonia water until the film turns dark purple, take it out and wash it with deionized water, soak it in 1mol / L cobalt chloride solution for 24 hours, take it out and wash it with deionized water, Freeze-dried for 10 h, placed in a tube reactor, under N 2 Under the atmosphere, ...

Embodiment 3

[0041] Weigh 0.0358g (0.21mmol) of triaminophenyl borate hydrochloride (ABA), and dissolve it in 835µL of 6mol / L hydrochloric acid solution to prepare an ABA solution.

[0042] Add the above-mentioned ABA solution, 0.264g (2.8mmol) aniline (AN) and 234µL deionized water to 2mL of 10wt% polyvinyl alcohol (PVA) solution in sequence, stir for 30min under heating in a water bath at 55°C, until the solution is clear, place on ice In a water bath, cool to 0°C, add 1.652mL 2mol / L ammonium persulfate (APS) solution dropwise, stir quickly and evenly, pour into a mold, and polymerize at room temperature for 12 hours to prepare polyvinyl alcohol-polyaniline conductive hydrogel Polymer film PPH.

[0043] Soak PPH in 0.5mol / L ammonia water until the film turns dark purple, take it out and wash it with deionized water, soak it in 2mol / L cobalt chloride solution for 24h, take it out and wash it with deionized water, Freeze-dried for 10 h, placed in a tube reactor, under N 2 Under the atmos...

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PUM

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Abstract

The invention relates to a cobalt-based complex catalyst for a direct methanol fuel cell anode,and a preparation method thereof, wherein a polyvinyl alcohol-polyaniline conductive hydrogel treated with a weakly alkali is as a carrier, and is soaked in a soluble cobalt salt, and calcining is performed in an inert atmosphere to obtain an elemental cobalt nanocrystalline composite material wrapped bya nitrogen-containing carbon material and having elemental cobalt content of 2-6 wt%. According to the invention, a brand-new catalyst carrier loaded transition metal cobalt is adopted to replace traditional precious metals, and the electronic structure of the catalyst is regulated and controlled by doping heteroatoms, so that the catalytic activity and the electrode conductivity of the catalystare improved, and the catalyst has excellent electrochemical reaction activity.

Description

technical field [0001] The invention relates to a fuel cell anode catalyst, in particular to a direct methanol fuel cell non-noble metal-based carbon material anode catalyst in an alkaline system and a preparation method thereof. The catalyst prepared by the invention can be used for the electrochemical catalytic oxidation of methanol. Background technique [0002] Direct methanol fuel cell (DMFC) has attracted the attention of researchers due to its simple structure, easy portability, good fuel portability, high specific energy density, and low pollutant emissions. In recent years, DMFCs have become one of the important alternative power sources for portable and small electronic devices. Polymer electrolyte fuel cells (PEFCs) are considered to be one of the most promising power sources due to their high energy density and fuel efficiency. [0003] At present, noble metals such as Pt, Pd, and Ru have been widely used as anode catalysts of DMFC. However, due to its high co...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M8/1011
CPCH01M4/9041H01M4/9083H01M8/1011Y02E60/50
Inventor 胡拖平翟玫旭安富强高建峰宋江锋
Owner ZHONGBEI UNIV
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