Alkaline system direct methanol fuel cell anode catalyst and preparation method thereof

A methanol fuel cell and catalyst technology, which is applied to fuel cells, battery electrodes, electrochemical generators, etc., can solve the problems of affecting the electrochemical reaction activity of methanol oxidation, complicated preparation process, and low uniform dispersion of active component nickel, etc. Achieving the effect of excellent electrochemical reactivity

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

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Problems solved by technology

However, the traditional nickel-based catalyst preparation method and preparation process are complicated, and the uniform dispersion of the active component nickel is not high, which directly affects its electrochemical reactivity for methanol oxidation.
[0007] For example, the Ni / 3D-graphene catalyst in the above literature has a methanol oxidation current density of only 64.6mA∙cm at a voltage of 1.6V (vs RHE). −2 , the methanol oxidation current density of NiO NTs-400 catalyst at 1.5V (vs RHE) is only 24.3mA∙cm −2 , V O -rich NiO nanosheets catalyst has a methanol oxidation current density of only 85.3mA∙cm at 1.5V (vs RHE) −2

Method used

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  • Alkaline system direct methanol fuel cell anode catalyst and preparation method thereof
  • Alkaline system direct methanol fuel cell anode catalyst and preparation method thereof
  • Alkaline system direct methanol fuel cell anode catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.0364g (0.21mmol) of triaminophenyl borate hydrochloride (ABA), and dissolve it in 835µL of 6mol / L hydrochloric acid solution to prepare an ABA solution.

[0029] Add the above-mentioned ABA solution, 274µL (3mmol) aniline (AN) and 241µL deionized water to 2mL of 10wt% polyvinyl alcohol (PVA) solution in sequence, stir in a water bath at 55°C for 30min, until the solution is clear, place in an ice-water bath , cooled to 0°C, 1.65mL 2mol / L ammonium persulfate (APS) solution was added dropwise, stirred quickly and evenly, poured into the mold, and polymerized at room temperature for 12 hours to prepare polyvinyl alcohol-polyaniline conductive hydrogel polymer film.

[0030] After the formed polymer film is washed with deionized water, it is placed in a 5mol / L nickel chloride solution and soaked for 18h, taken out and washed with deionized water, freeze-dried for 10h, placed in a tubular reactor, and placed in a N 2 Under the atmosphere, the temperature was raised ...

Embodiment 2

[0034] Weigh 0.0242g (0.14mmol) of triaminophenyl borate hydrochloride (ABA), and dissolve it in 835µL of 6mol / L hydrochloric acid solution to prepare an ABA solution.

[0035] Add the above-mentioned ABA solution, 183µL (2mmol) aniline (AN) and 882µL deionized water to 2.5mL 8wt% polyvinyl alcohol (PVA) solution in sequence, stir for 30min under heating in a water bath at 55°C, until the solution is clear, place in an ice-water bath , cooled to 0°C, added dropwise 1.10mL 2mol / L ammonium persulfate (APS) solution, stirred quickly and evenly, poured into the mold, and polymerized at room temperature for 12 hours to prepare polyvinyl alcohol-polyaniline conductive hydrogel polymerized object film.

[0036] After the formed polymer film was washed with deionized water, it was placed in a 3mol / L nickel chloride solution and soaked for 18h, taken out and washed with deionized water, freeze-dried for 10h, placed in a tubular reactor, and placed in a N 2 Under the atmosphere, the te...

Embodiment 3

[0039] 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.

[0040] Add the above-mentioned ABA solution, 229 µL (2.5 mmol) aniline (AN) and 561 µL deionized water to 2 mL of 12 wt% polyvinyl alcohol (PVA) solution in sequence, stir for 30 min under heating in a water bath at 55 °C, until the solution is clear, place in an ice-water bath , cooled to 0°C, added dropwise 1.38mL 2mol / L ammonium persulfate (APS) solution, stirred quickly and evenly, poured into the mold, and polymerized at room temperature for 12 hours to prepare polyvinyl alcohol-polyaniline conductive hydrogel polymerized object film.

[0041] After the formed polymer film is washed with deionized water, it is placed in a 5mol / L nickel chloride solution and soaked for 18h, taken out and washed with deionized water, freeze-dried for 10h, placed in a tubular reactor, and placed in a N 2 Under the atmosphe...

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Abstract

The invention relates to an alkaline system direct methanol fuel cell anode catalyst and a preparation method thereof, wherein polyvinyl alcohol-polyaniline conductive hydrogel is used as a carrier and dip in a soluble nickel salt, and calcining is performed in an inert atmosphere to obtain an elemental nickel nanocrystalline composite material wrapped by a nitrogen-containing carbon material andhaving elemental nickel content of 2-8 wt%. According to the invention, a brand-new catalyst carrier loaded transition metal nickel 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 catalyst are 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] The massive consumption of fossil fuels has caused problems such as energy crisis, global warming, and environmental pollution. It is urgent to develop new energy sources and improve energy conversion efficiency. [0003] A direct methanol fuel cell (DMFC) is a fuel cell that uses methanol as fuel. Since methanol fuel itself is easy to produce, store and transport on a large scale, the final products of electrocatalytic oxidation of methanol are carbon dioxide and water. As a potential energy supply device, DMFC has the advantages of high energy conversion efficiency, strong reliability, clean and easy start-up, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M8/1011
CPCH01M4/9041H01M4/9083H01M8/1011Y02E60/50
Inventor 胡拖平武娜安富强高建峰宋江锋
Owner ZHONGBEI UNIV
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