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Copper-based anode catalyst for direct methanol fuel cell and preparation method thereof

A methanol fuel cell and catalyst technology, applied in fuel cells, battery electrodes, electrochemical generators, etc., can solve problems affecting the electrocatalytic performance of methanol oxidation, uneven dispersion of active component copper, complex preparation methods, etc., to achieve excellent Effects of electrochemical reactivity, avoidance of inactive regions, and enhancement of catalytic activity

Active Publication Date: 2021-07-02
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation methods of traditional copper-based catalysts are complex, and the active component copper is unevenly dispersed, which affects its electrocatalytic performance for methanol oxidation and limits its wide application.
[0009] For example, in the above literature, Cu(OH) 2 -CuO / Cu catalyst with methanol oxidation current density of only 70 mA∙cm at 0.65 V (vs SCE) −2 , Cu(OH) 2 The methanol oxidation current density of the catalyst at 0.6V (vs SCE) is only 52mA∙cm −2 , while the methanol oxidation current density of Cu / NiCu NWs-220 / C catalyst at 0.5 V (vs SCE) is only 34.9 mA∙cm −2

Method used

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  • Copper-based anode catalyst for direct methanol fuel cell and preparation method thereof
  • Copper-based anode catalyst for direct methanol fuel cell and preparation method thereof
  • Copper-based anode catalyst for direct methanol fuel cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 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.

[0035] Add the above ABA solution, 0.233g (2.5mmol) aniline (AN) and 62µL deionized water into 2mL 10wt% polyvinyl alcohol (PVA) solution in turn, heat and stir in a water bath at 55°C for 30min, until the solution is clear, place it on ice Cool in a water bath to 0°C, add 1.375mL 2mol / L ammonium persulfate (APS) solution dropwise, stir quickly and evenly, pour it into a mold, and let it stand at room temperature for 24h to prepare polyvinyl alcohol-polyaniline conductive hydrogel polymer film.

[0036] Place the formed polyvinyl alcohol-polyaniline conductive hydrogel polymer film in a refrigerator at -20°C for 8 hours, take it out, let it thaw at room temperature, wash it with deionized water, and place it in a solution containing 0.1mol / L H 2 SO 4 In the 1mol / L copper sulfate electroplating solution, the...

Embodiment 2

[0040] 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.

[0041] Add the above ABA solution, 0.264g (2.8mmol) aniline (AN) and 234µL deionized water into 2mL 10wt% polyvinyl alcohol (PVA) solution in turn, heat and stir in a water bath at 55°C for 30min, until the solution is clear, place it on ice Cool in a water bath to 0°C, add 1.652mL 2mol / L ammonium persulfate (APS) solution dropwise, stir quickly and evenly, pour it into a mold, and let it stand at room temperature for 24h to prepare polyvinyl alcohol-polyaniline conductive hydrogel polymer film.

[0042] The formed polyvinyl alcohol-polyaniline conductive hydrogel polymer film was placed in a -20°C refrigerator for 8 hours, taken out, and thawed at room temperature. After 3 freeze-thaw cycles, wash with deionized water and place in a place containing 0.1mol / L H 2 SO 4 In the 0.5mol / L copper sulfate electrop...

Embodiment 3

[0045] Weigh 0.0182g (0.11mmol) of triaminophenyl borate hydrochloride (ABA), and dissolve it in 835µL of 6mol / L hydrochloric acid solution to prepare an ABA solution.

[0046] Add the above-mentioned ABA solution, 0.189g (2.0mmol) aniline (AN) and 710µL deionized water into 2mL 10wt% polyvinyl alcohol (PVA) solution in turn, heat and stir in a water bath at 55°C for 30min, until the solution is clear, place on ice Cool in a water bath to 0°C, add 0.937mL 2mol / L ammonium persulfate (APS) solution dropwise, stir quickly and evenly, pour it into a mold, and let it stand at room temperature for 24h to prepare polyvinyl alcohol-polyaniline conductive hydrogel polymer film.

[0047] The formed polyvinyl alcohol-polyaniline conductive hydrogel polymer film was placed in a -20°C refrigerator for 8 hours, taken out, and thawed at room temperature. After 5 freeze-thaw cycles, wash with deionized water and place in a 2 SO 4 In the 3mol / L copper sulfate electroplating solution, the po...

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Abstract

The invention relates to a copper-based anode catalyst for direct methanol fuel cells and a preparation method thereof, which adopts freeze-thawed polyvinyl alcohol-polyaniline conductive hydrogel as a carrier, and uses it to load transition metal copper through electrodeposition, and is inert The composite material is obtained after being calcined under the atmosphere, is supported by nitrogen-containing carbon material, and has a content of 60 to 80 wt% of simple copper nanocrystals. The present invention adopts a brand-new catalyst carrier to replace precious metals by electrodepositing transition metal copper, regulates the electronic structure of the catalyst by doping heteroatoms, improves the catalytic activity and electrode conductivity of the catalyst, and uses it directly as the anode of a direct methanol fuel cell, which has excellent electrochemical reactivity.

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 electrocatalytic oxidation of methanol. Background technique [0002] In order to meet the increasing energy demand of human beings and solve the increasingly serious environmental problems, more and more attention has been paid to the research of green and alternative new energy sources. [0003] Among them, direct methanol fuel cell (DMFC), as a fuel cell using methanol as fuel, has the advantages of wide fuel source, convenient use, and low price, and the transportation and storage of methanol are more convenient and safe. Methanol in DMFC is directly oxidized on the electrode to convert chemical energy into electrical energy, and the product is mainly H 2 O and CO 2 , does not generate NO...

Claims

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Application Information

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