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Non-platinum nano catalyst for direct methyl alcohol fuel battery anode and its preparing method

A methanol fuel cell and nano-catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high battery cost, high price, platinum or platinum alloy poisoning failure, etc., and achieve high CO poisoning resistance and low cost Price, Effect of High Methanol Electrocatalytic Activity

Inactive Publication Date: 2002-11-06
惠州仲恺城市发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the catalyst used in direct methanol fuel cells is platinum or platinum alloys, on the one hand, the cost of the battery is too high; on the other hand, intermediate products are produced in the chemical reaction of methanol oxidation on the anode CO, and CO will poison platinum or platinum alloys and reduce the catalytic efficiency of the catalyst, thereby affecting the overall performance of the battery
Although the carbon-supported Pt-Ru alloy catalyst has high resistance to CO poisoning, both Pt and Ru are rare and noble metals, and the price is high, which makes the price of the carbon-supported Pt-Ru alloy catalyst remain high, thus greatly reducing the direct methanol fuel. Performance-price ratio and market competitiveness of batteries

Method used

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  • Non-platinum nano catalyst for direct methyl alcohol fuel battery anode and its preparing method
  • Non-platinum nano catalyst for direct methyl alcohol fuel battery anode and its preparing method
  • Non-platinum nano catalyst for direct methyl alcohol fuel battery anode and its preparing method

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Effect test

Embodiment 1

[0025] According to the ratio of Mn:Ni=3.0, take an appropriate volume of 0.1M Mn(NO 3 ) 2 solution and 0.1MNi(NO 3 ) 2 The solution is mixed, and then acidic sodium bismuthate is added to the mixed solution as an oxidizing agent.

[0026] The mixed solution prepared above was applied to the graphite electrode, and the graphite electrode coated with the mixed solution was placed in a furnace at a temperature of 450°C for heat treatment for 30 minutes, so that a thin Mn-Ni nano-catalyst layer was formed on the surface of the electrode.

[0027] Through the DMFC single-cell evaluation device, the nano-catalyst of the present invention and the Pt / C catalyst are used as anode and cathode catalysts respectively, and the Nafion membrane is used as a proton exchange membrane to assemble a single cell, and the voltage-current of the single cell of the battery is measured. Polarization curve, the experimental results are as follows figure 2 shown. figure 2 showed that the as-pre...

Embodiment 2

[0030] According to the ratio of Mn:Ni=2.4, take an appropriate volume of 0.1M Mn(NO 3 ) 2 solution and 0.1MNi(NO 3 ) 2 The solution was mixed, and then sodium perchlorate was added as an oxidizing agent to the mixed solution.

[0031] The mixed solution prepared above was applied to the graphite electrode, and the graphite electrode coated with the mixed solution was placed in a furnace at a temperature of 250°C for heat treatment for 30 minutes, so that a thin Mn-Ni nano-catalyst layer was formed on the surface of the electrode.

[0032] Using a three-electrode system, the prepared electrode with a nano-catalyst layer was used as a working electrode, placed in a 2 SO 4 and 1M CH 3 In the electrolytic cell of OH electrolyte, the pure graphite electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode, and the polarization curve of the working electrode at 60°C is measured. Experimental results such as image 3 sho...

Embodiment 3

[0034] According to the ratio of Mn:Fe=3.3, take an appropriate volume of 0.1M Mn(NO 3 ) 2 solution and 0.1MFe(NO 3 ) 3 The solution is mixed, and then potassium permanganate is added as an oxidizing agent to the mixed solution.

[0035] The mixed solution prepared above was applied to the graphite electrode, and the graphite electrode coated with the mixed solution was placed in a furnace at a temperature of 250°C for heat treatment for 10 minutes, so that a thin Mn-Fe nano-catalyst layer was formed on the surface of the electrode.

[0036] Using a three-electrode system, the prepared electrode with a nano-catalyst layer was used as a working electrode, placed in a 2 SO 4 and 1M CH 3 In the electrolytic cell of OH electrolyte, the pure graphite electrode is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode, and the polarization curve of the working electrode at 60 ° C is measured. The experimental results are as follows...

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Abstract

A direct method to prepare nanometre catalyst of positive electrode for methyl alcohol fuel battery is to add strong oxidant to a mixed solution of manganese nitrate and some other metal nitrate, to coat them on the graphite electrode to have catalyst precursor produced, then to prepare the non-platinum nanometre catalyst of metal ion-doped manganese dioxide with carbon as a carrier by thermolytic reaction of the in-situ precursor. The prepared catalyst has the advantages of high electrical catalytic activity of methyl alcohol, high performance to protect against CO poison and low price, and it can lower the battery manufacturing cost effectively as well as can raise the entire electrical property of the battery so that the price performance and the market competitive edge of the battery are enchnaced effectively.

Description

(1) Technical field [0001] The invention relates to the field of electrochemical fuel cells, in particular to a direct methanol fuel cell anode non-platinum nano-catalyst, and also relates to a preparation method of the nano-catalyst. (2) Background technology [0002] A direct methanol fuel cell is a chemical power source that uses liquid methanol and oxygen in the air as electrode active materials. with gas H 2 Compared with fuel cells, liquid methanol fuel cells have higher volume-specific energy and weight-specific energy, are safer, and are more convenient for transportation, storage and handling. Therefore, direct methanol fuel cell is the most ideal power source for transportation tools, especially electric vehicles, and has a huge application prospect and market. At present, the research on anode catalysts for direct methanol fuel cells mainly focuses on the noble metal platinum and platinum alloys. Among them, the carbon-supported Pt-Ru alloy is considered to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCY02E60/50
Inventor 周震涛何燕
Owner 惠州仲恺城市发展集团有限公司