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Novel method for preparing core-shell structure catalyst

A core-shell structure and catalyst technology, which is applied in the field of novel preparation of core-shell structure catalysts, can solve the problems of insignificant improvement in preparation efficiency, complicated relative reaction methods, etc., so as to save preparation raw materials, reduce reduction time, and improve quality. Effect

Inactive Publication Date: 2018-11-23
南京东焱氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method improves the efficiency of preparing core-shell catalysts by using a microreactor, but it specifically adopts a core-shell preparation method in which the copper covered on the palladium surface is replaced by platinum. The relative reaction method is more complicated, and the microreactor is only used in The process of preparing the shell, so the effect of improving the preparation efficiency is not obvious

Method used

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  • Novel method for preparing core-shell structure catalyst
  • Novel method for preparing core-shell structure catalyst
  • Novel method for preparing core-shell structure catalyst

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Effect test

Embodiment 1

[0034] A method for preparing a catalyst with a core-shell structure, using a microreactor and in the microreactor: preparing a carbon-supported metal core, using a polyhydric alcohol to reduce the shell metal, and then reacting the shell metal with the carbon-supported metal core to produce A core-shell catalyst was obtained.

[0035] Specifically include the following steps:

[0036] S1. According to the molar ratio of the metal salt and citric acid being 1:1-1:7, configure a mixed aqueous solution of the metal salt and citric acid to obtain a solution a with a concentration of 0.01-0.1 g / ml;

[0037] S2, using KOH, NaOH, ethylamine, triethylamine and an aqueous alkali solution b with a concentration of 5g / L-10g / L in ammonia;

[0038] S3. Use intermediate frequency ultrasound to disperse one or more of carbon black XC-72, carbon black AC30 and carbon black ECP600 to prepare the slurry c with a concentration of 0.1g / L-1g / L, and control the time of ultrasound In 30-60min;

...

Embodiment 2

[0045] S1, respectively weighing 0.109g copper sulfate pentahydrate and 0.263g citric acid were dissolved in 50mL water to obtain solution a;

[0046] S2, weigh again 0.270gKOH and dissolve in 30mL water to obtain alkaline aqueous solution b;

[0047] S3, ultrasonically disperse 0.12g of carbon black AC30 in 100mL of water, and ultrasonically until the carbon black has no fine particles, to obtain slurry c;

[0048] S4. Put the solution a and the slurry c into the microreactor at a flow rate of 2.5mL / min and 5mL / min respectively, and then mix them slightly with the aqueous alkali solution b at a flow rate of 1.5mL / min, and control the reaction temperature and time to 20°C respectively and 15min, after the reaction, the solution was added with 40mg sodium borohydride to obtain solution d;

[0049] S5. Use a positive pressure filter to filter the solution d, then wash with water 4-5 times, and finally use a vacuum drying oven to control the drying temperature at 60°C for 12 hou...

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Abstract

The invention belongs to the technical field of core-shell structure catalysts, and particularly relates to a novel method for preparing a core-shell structure catalyst. The novel method for preparingthe core-shell structure catalyst is different from the prior art. A microreactor is adopted in the novel method for preparing the core-shell structure catalyst, and a carbon-supported metal core isprepared in the microreactor, a shell metal is reduced by using polyol, and the shell metal is reacted with the carbon-supported metal core to prepare the core-shell catalyst. The method for preparingthe core-shell structure catalyst has higher preparation efficiency, less required raw materials and simple operation.

Description

technical field [0001] The invention belongs to the technical field of core-shell structure catalysts, and in particular relates to a novel method for preparing core-shell structure catalysts. Background technique [0002] A fuel cell is a power generating device that directly converts the chemical energy present in fuel and oxidant into electrical energy. Fuel and air are respectively fed into the fuel cell, and then electricity is generated and applied to existing equipment, such as military, space, power plants, and fields such as motor vehicles, mobile devices, and households, which promote the conversion of this fuel cell into The most important part of electric energy is the catalyst, which can make the raw material produce electric energy quickly and efficiently. The catalysts currently used in fuel cells are core-shell catalysts. [0003] An existing patent of a carbon-supported nano-copper-nickel alloy core-noble metal shell core-shell catalyst and its preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 顾军
Owner 南京东焱氢能源科技有限公司
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