ORR catalyst material and preparation method and application thereof

A catalyst and carbon material technology, applied in the field of catalyst materials, can solve the problems of large amount of precious metals, small specific surface area, high cost, etc., and achieve the effect of simple preparation method, high specific surface area and high porosity

CN112397732AInactive Publication Date: 2021-02-23SHANGHAI MARITIME UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an ORR catalyst material, a preparation method of the ORR catalyst material, an application of the ORR catalyst material as a cathode material of a hydrogen-oxygen fuel cell or a metal-air cell, and the hydrogen-oxygen fuel cell or the metal-air cell. The ORR catalyst material is characterized by meeting the following general formula: Mx / N-C(1-x-y) / (CeO2)y (I), wherein thenoble metal M is one or more than two of Pt, Pd and Au, x and y are mass percentages, the range of x is 5%-6%, and the range of y is 4%-12%. The preparation method of the ORR catalyst material is characterized in that the catalyst precursor material is a noble metal acid radical doped conductive polymer composite material. The invention mainly solves the technical problems of non-uniform noble metal dispersion, poor catalytic performance, complex preparation method of the catalyst material, no environmental protection and high cost of the ORR catalyst material in the prior art.
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Description

technical field

[0001] The first aspect of the present invention relates to a catalyst material, in particular to an ORR catalyst material; the second aspect of the present invention also relates to the preparation method of the ORR catalyst material; the third aspect of the present invention relates to the ORR catalyst material as a hydrogen-oxygen fuel cell or Use of metal-air battery cathode material and a hydrogen-oxygen fuel cell or metal-air battery. Background technique

[0002] With the rapid development of the global economy, environmental pollution and energy shortages are becoming more and more serious, how to produce and utilize renewable energy more effectively and stably has become an urgent issue for mankind. Although wind energy, solar energy, hydropower, and tidal energy are green and clean energy sources that have become alternatives to fossil fuels, these energy sources, which rely heavily on the natural environment, have problems of intermittency and vola...

Examples

preparation example Construction

[0065] see figure 1 , a preparation method of the aforementioned ORR catalyst material, comprising the following steps:

[0066] 1) Get CeO 2 ;

[0067] 2) Utilize the CeO 2 A catalyst precursor material is prepared, the catalyst precursor material is a conductive polymer composite material doped with noble metal acid groups, and the chemical formula of the catalyst precursor material is CeO 2 / CP-MX n- , X is an acid radical, n is 1 or 2;

[0068] 3) Carbonizing the catalyst precursor material at high temperature to prepare the ORR catalyst material.

[0069] The step 1) obtains Ce0 2, , commercially available micron and / or nanoscale Ce0 2 , which can also be prepared as follows:

[0070] 1.1) dissolving cerium nitrate and sodium hydroxide in deionized water, adjusting the pH value of the solution, and stirring to obtain a reaction solution; preferably, in the step 1.1), the molar ratio of the cerium nitrate and the sodium hydroxide is 1:4, the pH value is 12, and th...

Embodiment 1

[0090] Prepare a cerium nitrate solution with a concentration of 0.1M and adjust it to pH = 12 with sodium hydroxide. After magnetically stirring for 2 hours, place the solution in an oven at 60°C for 1 hour. After filtering and washing, place the yellow solid in an oven at 130°C. After annealing for 4h, cerium oxide was obtained after cooling to room temperature for 2h.

[0091] With 0.6g (3.5mmol) cerium oxide, 0.1g (0.2mmol) potassium chloroplatinate (K 2 PtCl 6 ) was added to 40ml of 1mol / L HCl solution to obtain solution I. After ultrasonic dispersion for 2 hours, 0.6ml of aniline monomer (6.4mmol) was added to solution I to obtain solution II; 0.6g of APS (4mmol) was dissolved in 10ml of 1mol / LHCl solution to obtain solution III, and disperse it evenly by ultrasonication for 2 hours; control the dropping speed of solution III so that it slowly drops into solution II; keep at 5°C and react for 5 hours. The reaction process is accompanied by magnetic stirring; the catal...

Embodiment 2

[0099] Embodiment 2 (difference from embodiment 1 is that potassium chloroplatinate consumption is 0.05g)

[0100] Prepare a cerium nitrate solution with a concentration of 0.1M and adjust it to pH = 12 with sodium hydroxide. After magnetically stirring for 2 hours, place the solution in an oven at 60°C for 1 hour. After filtering and washing, place the yellow solid in an oven at 130°C. After annealing for 4h, cerium oxide was obtained after cooling to room temperature for 2h.

[0101] With 0.6g (3.5mmol mol) cerium oxide, 0.05g (0.1mmol) potassium chloroplatinate (K 2 PtCl 6 ) was added into 40ml of 1mol / L HCl solution to obtain solution I. After ultrasonic dispersion for 2 hours, 0.6ml (6.4mmol) aniline monomer was added to solution I to obtain solution II; 0.6g (4mmol) APS was dissolved in 10ml of 1mol / LHCl solution to obtain solution III, ultrasonically for 2 hours to disperse evenly; control the dripping speed of solution III to slowly drip into solution II; keep at 5°...