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Multilayer catalysis layer alleviating attenuation of alloy contained catalysis layer and preparation method of multilayer catalysis layer

A technology of alloy catalyst and catalytic layer, which is applied in the field of catalysis, can solve the problems of mature preparation process, low output, complex and cumbersome preparation process, etc., and achieve the effect of mitigating pollution and mitigating impact

Active Publication Date: 2019-08-02
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of multi-metal elements and special structure alloy catalysts is more complicated and cumbersome than bimetal element alloy catalysts, and the preparation process is not as mature as bimetal element alloy catalysts, and the output is also low. At present, it still mainly exists in laboratory research.

Method used

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  • Multilayer catalysis layer alleviating attenuation of alloy contained catalysis layer and preparation method of multilayer catalysis layer
  • Multilayer catalysis layer alleviating attenuation of alloy contained catalysis layer and preparation method of multilayer catalysis layer
  • Multilayer catalysis layer alleviating attenuation of alloy contained catalysis layer and preparation method of multilayer catalysis layer

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Embodiment 1

[0047] A method for preparing a multilayer catalytic layer that alleviates the attenuation of an alloy-containing catalytic layer, the steps are as follows:

[0048] (1) 0.12g mass fraction of 50% platinum carbon carrier catalyst, 0.03g EC-300 carbon powder and 1.1g mass fraction of 5% Nafion resin solution are carried out ultrasonic dispersion in 29g isopropanol to make catalytic layer slurry. The catalyst layer slurry was prepared on the proton exchange membrane 1 by an ultrasonic sprayer to prepare a platinum-carbon catalyst layer. Then 0.12g of 40% platinum-nickel carbon-supported catalyst, 0.03g of EC-300 carbon powder and 0.9g of 5% Nafion resin solution in 29g of n-propanol were ultrasonically dispersed to prepare the catalytic layer slurry. The catalytic layer slurry was prepared on the proton exchange membrane 1 by an ultrasonic sprayer to prepare a platinum-nickel alloy catalytic layer.

[0049] (2) figure 1 This is a schematic diagram of the structure of the mult...

Embodiment 2

[0052] A method for preparing a multilayer catalytic layer that alleviates the attenuation of an alloy-containing catalytic layer, the steps are as follows:

[0053] (1) 0.15g mass fraction of 50% platinum carbon carrier catalyst, 0.03g EC-300 carbon powder and 1.1g mass fraction of 5% Nafion resin solution are carried out ultrasonic dispersion in 29g isopropanol to make catalytic layer slurry. The catalyst layer slurry was prepared on the proton exchange membrane 1 by an ultrasonic sprayer to prepare a platinum-carbon catalyst layer. Afterwards, 0.15 g of 40% platinum-cobalt carbon-supported catalyst, 0.03 g of EC-300 carbon powder and 0.9 g of 5% Nafion resin solution were ultrasonically dispersed in 29 g of n-propanol to prepare a catalytic layer slurry. A platinum-cobalt alloy catalytic layer was prepared on the proton exchange membrane 1 by using the catalytic layer slurry through an ultrasonic sprayer.

[0054] (2) The platinum-carbon catalytic layer is close to the pr...

Embodiment 3

[0056] A method for preparing a multilayer catalytic layer that alleviates the attenuation of an alloy-containing catalytic layer, the steps are as follows:

[0057] (1) 0.15g mass fraction of 40% platinum-nickel carbon-supported catalyst, 0.03g EC-300 carbon powder and 0.9g mass fraction of 5% Nafion resin solution are ultrasonically dispersed in 29g isopropanol to make a catalytic layer of slurry. A platinum-nickel alloy catalytic layer was prepared on a polytetrafluoroethylene substrate by using the catalytic layer slurry through an ultrasonic sprayer. After that, 0.15 g of 50% platinum-carbon-supported catalyst, 0.03 g of EC-300 carbon powder, and 1.1 g of 5% Nafion resin solution in 29 g of n-propanol were ultrasonically dispersed to prepare a catalytic layer slurry. The catalytic layer slurry was prepared on a polytetrafluoroethylene substrate by an ultrasonic sprayer to prepare a platinum-carbon catalytic layer. So far, the preparation of the catalytic layer on the su...

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Abstract

The invention relates to a multilayer catalysis layer alleviating attenuation of an alloy contained catalysis layer and a preparation method of the multilayer catalysis layer. The catalysis layer of amultiplayer structure necessarily includes a layer prepared from a non alloy catalyst and a layer prepared from an alloy catalyst, the catalyst layer prepared from the non alloy catalyst is preparedin the side close to a proton exchange membrane, and the alloy catalyst included catalysis layer is prepared in the side close to a gas diffusion layer. Compared with the prior art, the catalyst layerwith a pollution source contained alloy catalyst is far from the proton exchange membrane and close to the gas diffusion layer, and the condition that transitional metal elements are dissolved and pollute the proton exchange membrane can be alleviated.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to a structure for alleviating the attenuation of an alloy-containing catalytic layer and a preparation method thereof. Background technique [0002] Fuel cell is a kind of energy conversion device with high energy efficiency, high specific power and good environment. In recent years, it has attracted more and more attention in the field of fixed power station and portable power supply. Among many fuel cell systems, proton exchange membrane fuel cells have the advantages of low start-up temperature, high specific energy, and rapid response, and thus become a research hotspot in the field of fuel cells. [0003] The membrane electrode is the core component of the proton exchange membrane fuel cell, which is composed of the cathode catalyst layer electrode, the anode catalyst layer electrode and the proton exchange membrane. Among them, the catalytic layer electrode is the place where fuel a...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/92
CPCH01M4/8657H01M4/8668H01M4/8673H01M4/8832H01M4/8828H01M4/8825H01M4/926H01M4/921Y02E60/50
Inventor 林瑞李闻斌朱玉
Owner TONGJI UNIV
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