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Preparation method of platinum catalyst by taking porous foaming aluminum as carrier for methyl alcohol reformer combustion chamber

A porous foam and platinum catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the negative impact of the catalyst skeleton on the catalyst and the low utilization rate of the catalyst , Insufficient contact between hydrogen and platinum, to achieve the effect that the coverage is not easy to fall off, the thickness can be adjusted, and the coverage is complete

Active Publication Date: 2014-07-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a platinum catalyst based on porous aluminum foam modified by micro-arc oxidation technology, which can effectively solve the problem of insufficient contact between hydrogen and platinum in the combustion chamber of the existing methanol reformer and the catalyst utilization rate. Low and the catalyst skeleton has a negative impact on the catalyst and other issues

Method used

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  • Preparation method of platinum catalyst by taking porous foaming aluminum as carrier for methyl alcohol reformer combustion chamber
  • Preparation method of platinum catalyst by taking porous foaming aluminum as carrier for methyl alcohol reformer combustion chamber

Examples

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Embodiment 1

[0021] Put the porous aluminum foam in the working solution composed of 5-15g / L sodium aluminate and 0.5-2g / L sodium hypophosphite, use the foamed aluminum as the positive electrode, and the working tank as the negative electrode, and use a DC power supply at 300- 600V voltage, 10-30A / dm 2 Treat for 30-180 minutes under the condition of constant current density.

[0022] Add 15mL of chloroplatinic acid into the flask, add 1mL, 37% (mass fraction) of formaldehyde and 1mL, 20% (mass fraction) of sodium hydroxide solution, and finally put the porous aluminum foam in the flask, and raise the temperature to 80~ Stop heating after 95°C, cool, filter, and finally get a loading of 5-50mg / cm 2 platinum catalyst.

[0023] With the above-mentioned catalyst carrier, after loading the catalyst, put it in the combustion chamber (such as figure 1 ), the combustion chamber is a groove conforming to the volume of the carrier, and the front and rear respectively communicate with the inlet h...

Embodiment 2

[0025] The difference between this example and Example 1 is that the working fluid contains 10g / L of sodium aluminate and 1g / L of sodium hypophosphite. The output voltage of the DC power supply is 600V and the current density is 15A / dm. 2 , The processing time is 60 minutes.

Embodiment 3

[0027] The difference between this embodiment and Embodiment 1 is that an AC power source is used for the micro-arc oxidation power source, and the peak current density of the forward pulse is 10-30A / dm 2 , The peak current density of the negative pulse is 0-20 A / dm 2 , The working frequency is 10-3000Hz, and the processing time is 20-120min.

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Abstract

The invention discloses a preparation method of a platinum catalyst by taking porous foaming aluminum as a carrier for a methyl alcohol reformer combustion chamber. The preparation method comprises the following steps: placing porous foaming aluminum as an anode into electrolyte containing one or two of aluminate, silicate, fluoroziconate and sodium hypophosphite, carrying out micro-arc oxidation treatment by applying a direct-current or alternating-current voltage for 10-120 minutes, forming a layer of porous oxidation ceramic membrane on the surface of the foaming aluminum, and loading the Pt based catalyst on the surface of the ceramic membrane serving as a substrate, thereby obtaining the Pt based catalyst for the methyl alcohol reformer combustion chamber. According to the invention, the problems of insufficient contact of hydrogen and platinum in the existing methyl alcohol reformer combustion chamber, low catalyst utilization ratio, adverse effect to the catalyst by a catalyst framework and the like are solved.

Description

technical field [0001] The invention belongs to the field of proton exchange ceramic membrane fuel cell fuel, and relates to a preparation method of a platinum-based catalyst used in a combustion chamber of a methanol reformer. Background technique [0002] The new energy sources currently being researched mainly include nuclear energy, wind energy, solar energy, geothermal energy, biomass energy and fuel cells, etc. Among them, fuel cells have the characteristics of high efficiency, simple structure, little pollution or even no pollution. Progress, so that it can compete with traditional energy sources in terms of price and performance, fuel cell technology is getting more and more attention. Compared with other types of fuel cells, direct methanol fuel cell (DMFC) is more suitable as a portable energy source. It has the advantages of high efficiency, high energy density, small size, low fuel price, low environmental pollution, and long-lasting energy supply. It can be wid...

Claims

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Application Information

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IPC IPC(8): B01J23/42H01M4/92
CPCY02E60/50
Inventor 张雪林陈海龙张宇峰刘晓为
Owner HARBIN INST OF TECH
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