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Ordered mesopore catalyst layer and preparation method thereof, application of ordered mesopore catalyst layer, and film electrode and preparation method thereof

A technology of sequential mesoporous catalytic layer and catalytic layer, applied in battery electrodes, circuits, fuel cells, etc., can solve the problems of general dispersion, cumbersome steps, low utilization rate of precious metal catalysts, etc., to improve electrochemical performance and improve distribution. and the effect of uniformity of size

Active Publication Date: 2019-06-07
上海海擎新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to synthesize an ordered membrane electrode by vapor deposition of a mesoporous hard template carrier. The preparation method used in this scheme is the hard template method, but the hard template method has cumbersome steps and high cost, which is not suitable for mass production and is difficult to completely remove the template. defects; secondly, the impregnation method supports the catalyst, the catalyst particles are large, and the dispersion is general
[0006] Although the above invention provides some preparation methods for ordered membrane electrodes, there are still defects such as low utilization rate of noble metal catalysts and difficulty in mass production, which affects the structure and performance of membrane electrodes and limits the further exploration and development of ordered membrane electrodes. to develop

Method used

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  • Ordered mesopore catalyst layer and preparation method thereof, application of ordered mesopore catalyst layer, and film electrode and preparation method thereof
  • Ordered mesopore catalyst layer and preparation method thereof, application of ordered mesopore catalyst layer, and film electrode and preparation method thereof
  • Ordered mesopore catalyst layer and preparation method thereof, application of ordered mesopore catalyst layer, and film electrode and preparation method thereof

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preparation example Construction

[0071] figure 1 It is a schematic diagram of the principle of the preparation method of the membrane electrode described in the specific embodiment of the present invention; it can be seen from the figure that the method includes firstly using a noble metal precursor, a resin precursor and a block copolymer to prepare an ordered mesoporous catalyst. layer, and then use the obtained ordered mesoporous catalytic layer to prepare a membrane electrode, the specific steps are as follows:

[0072] (1) Precious metal precursors, resin precursors and block copolymers are mixed and subjected to film-forming treatment and solvent evaporation to form self-assembly among the three, followed by heat treatment to cure the resin precursors;

[0073] (2) After the product of step (1) is carbonized, the soft template is pyrolyzed, and the noble metal is reduced simultaneously to obtain the ordered mesoporous catalytic layer;

[0074] (3) Select the ordered mesoporous catalytic layer as the ca...

Embodiment 1

[0077] The phenolic resin described in the present embodiment is prepared by the following method:

[0078] (a) Heat and melt 4g phenol at 42°C, then add 0.85g NaOH and stir;

[0079] (b) Add 6.88g (concentration is 37wt%) formaldehyde solution to the product obtained in step (a), then react in a 75°C water bath for 80min, and cool;

[0080] (c) adding hydrochloric acid to adjust the pH of the product obtained in step (b) to neutral, and centrifuging to obtain a phenolic resin.

[0081] Preparation of cathode catalytic layer:

[0082] (1) the phenolic resin obtained in step (c), 6.56gF127, 8.52g tetraammine platinum chloride are dissolved in the mixed solution of ethanol and water with a volume ratio of 1:1 to obtain the first mixed solution;

[0083] (2) Evaporate the solvent from the first mixed solution obtained in step (1) at 25°C to obtain a second mixed solution with a viscosity of 1500mPa·s, use a scraper with a specification of 50μm to scrape, obtain a wet film, and ...

Embodiment 2

[0093] The phenolic resin described in the present embodiment is prepared by the following method:

[0094] (a) Heat and melt 2.6g of phenol at 42°C, then add 0.55g of NaOH and stir;

[0095] (b) Add 4.47g (concentration is 37wt%) formaldehyde solution to the product obtained in step (a), then react in 80°C water bath for 60min, and cool;

[0096] (c) adding hydrochloric acid to adjust the pH of the product obtained in step (b) to neutral, stirring and then standing still for liquid separation to obtain a phenolic resin.

[0097] Preparation of cathode catalytic layer:

[0098] (1) Dissolving the phenolic resin obtained in step (c), 4.26g F127, and 6.18g ammonium chloroplatinite in a mixed solution of water and isopropanol at a volume ratio of 2:1 to obtain the first mixed solution;

[0099] (2) Evaporate the solvent from the first mixed solution obtained in step (1) at 25°C to obtain a second mixed solution with a viscosity of 2500mPa·s, use a scraper with a specification o...

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Abstract

The present invention relates to an ordered mesopore catalyst layer and a preparation method thereof, application of an ordered mesopore catalyst layer, and a film electrode and a preparation method thereof. The preparation method of the ordered mesopore catalyst layer comprises the steps of: mixing a resin precursor, a soft template, a precious metal precursor and a solvent to obtain a mixed solution, performing film formation, evaporating the solvent, performing heat treatment and carbonization treatment of the mixed solution to obtain an ordered mesopore catalyst layer. When Pt is selectedas the precious metal, the film electrode prepared by employing the ordered mesopore catalyst layer has the highest power density up to 0.7W / cm2 when having the current density being 1.0A / cm2, and hasthe highest power density up to 1.21W / cm2 when having the current density being 2.0A / cm2.

Description

technical field [0001] The invention relates to the field of catalytic materials, in particular to an ordered mesoporous catalytic layer and its preparation method and application. Background technique [0002] The energy crisis has been threatening the sustainable development of human beings. As a green energy, hydrogen energy has attracted widespread attention from the international community and has become a research hotspot around the world. Fuel cells are one of the most important ways to utilize hydrogen energy. Among them, proton exchange membrane fuel cells, as a new type of energy generation device, have ushered in the best development opportunity in history. In a proton exchange membrane fuel cell (PEMFC), the membrane electrode, as the core component, is the place where the electrochemical reaction and energy conversion occur, and determines the performance and cost of the PEMFC. [0003] At present, the preparation of the membrane electrode of PEMFC usually adop...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M4/92H01M8/1004
CPCY02E60/50
Inventor 苏建敏吴丹范书琼米诗阳王秀张晓华
Owner 上海海擎新能源科技有限公司
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