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Multi-element doped platinum-based catalyst and preparation method and application thereof

A catalyst and doping technology, which is applied in the multi-doped platinum-based catalyst and its preparation field, can solve the problems of high price, low storage capacity of Pt metal, and easy poisoning, so as to improve utilization rate, improve durability, The effect of improving catalytic activity

Inactive Publication Date: 2020-06-02
FAW JIEFANG AUTOMOTIVE CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of low storage capacity, high price, and easy poisoning of Pt metal, the development of low-platinum catalysts with high activity and high durability is the current research focus.

Method used

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  • Multi-element doped platinum-based catalyst and preparation method and application thereof
  • Multi-element doped platinum-based catalyst and preparation method and application thereof
  • Multi-element doped platinum-based catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The preparation method of the multiple-doped platinum-based catalyst:

[0061] (I) Weigh 0.05g Ketjen black carbon powder and place it in a reaction container, add 20mL water to it, then place the mixed solution in an ultrasonic pulverizer homogenizer to disperse evenly, and continue ultrasonication for 10min to obtain Ketjen black carbon powder of the dispersion. Then continue to feed nitrogen into it for 30min, then proceed to the next step;

[0062] (II) Take 400 μL of chloroplatinic acid solution with a platinum element content of 0.1 g / mL, 50 μL of a ferric chloride solution with an iron content of 0.1 g / mL, and 50 μL of a cobalt chloride solution with a Co content of 0.1 g / mL in the In the dispersion liquid of the Ketjen black carbon powder prepared in the step (I), under the protection of nitrogen, continue to stir for 1h to obtain a mixed solution, so that the ions are fully adsorbed to the surface of the Ketjen black carbon powder;

[0063] (Ⅲ) Weigh 0.1 g of...

Embodiment 2

[0080] The preparation method of the multiple-doped platinum-based catalyst:

[0081] (I) Weigh 0.048g of Cabot carbon powder (Vulcan XC-72) and place it in a reaction vessel, add 15mL of water to it, then place the mixed solution in an ultrasonic homogenizer to disperse evenly, and continue ultrasonication for 60min to obtain Dispersion of Cabot toner, then continue to pass argon gas into it for 45 minutes, and then proceed to the next step;

[0082] (II) Take 500 μL of potassium tetrachloroplatinate solution with a platinum content of 0.1 g / mL, 10 μL of a nickel chloride solution with a nickel content of 0.1 g / mL, and 10 μL of a copper solution with a copper content of 0.1 g / mL. Copper chloride solution is added in the dispersion liquid of the prepared Cabot carbon powder of step (I), under argon protection, continue to stir 6h, obtain mixed solution, make ion fully adsorb on the surface of Cabot carbon powder;

[0083] (Ⅲ) Weigh 0.3 g of hydroxylamine hydrochloride, and un...

Embodiment 3

[0087] The preparation method of the multiple-doped platinum-based catalyst:

[0088] (I) Weigh 0.049g of carbon nanotubes and place them in a reaction vessel, add 20mL of water therein, then place the mixed solution in an ultrasonic homogenizer to disperse evenly, and continue ultrasonication for 30min to obtain a dispersion of carbon nanotubes, then Continuously inject helium into it for 30 minutes, and then proceed to the next step;

[0089] (II) Take 450 μL of potassium hexachloroplatinate solution with a platinum content of 0.1 g / mL, 30 μL of a cobalt nitrate solution with a Co content of 0.1 g / mL, and 30 μL of a sulfur solution with a Mo content of 0.1 g / mL. The ammonium molybdate solution is added to the dispersion of carbon nanotubes prepared in step (I), and under the protection of helium, the stirring is continued for 3h to obtain a mixed solution, so that the ions are fully adsorbed to the surface of the carbon nanotubes;

[0090] (Ⅲ) Weigh 0.15 g of potassium boro...

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Abstract

The invention relates to a multi-element doped platinum-based catalyst and a preparation method and application thereof. According to the preparation method of the platinum-based catalyst, combining an ion adsorption process and a top-speed reduction process, and efficiently and rapidly forming the doped platinum-based nanocrystalline formed on the surface of the carbon material. The method has the advantages of being easy to operate and control and suitable for engineering mass production; the multielement doped platinum-based catalyst prepared by the method disclosed by the invention is highin ORR activity, and the mass activity is as high as 255 mA / mg@0.9 V; the catalyst is prepared into a CCM and the CCM is assembled into a single battery for testing, wherein the active area is 50 cm<2>, the test battery temperature is 75 DEG C, the humidification temperature is 70 DEG C, the relative humidity is 60%RH and the stoichiometric ratio hydrogen / air is 1.2 / 2.5, the current density can reach 2,500 mA / cm<2> and 0.63 V, and the peak power density can reach 1.6 W / cm <2>.

Description

technical field [0001] The invention belongs to the field of new energy fuel cells, and in particular relates to a multiple-doped platinum-based catalyst and its preparation method and application. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the characteristics of high energy density, low operating temperature, good stability, low noise, and no pollution. It has broad application prospects in the field of power energy for new energy vehicles. At present, although the various technologies of PEMFC have matured and are on the eve of large-scale commercial application, in order to enable PEMFC to be commercialized as soon as possible, a large number of researchers are working hard on the research of related materials, trying to reduce the cost of PEMFC and improve properties of related materials. These include research on high-performance Pt / C electrocatalysts. However, due to the characteristics of low storage capacity, high price, and easy p...

Claims

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Application Information

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IPC IPC(8): H01M4/92B82Y30/00
CPCB82Y30/00H01M4/921H01M4/926Y02E60/50
Inventor 于力娜朱云唐柳张克金朱雅男杨帅
Owner FAW JIEFANG AUTOMOTIVE CO
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