Preparation method of self-doped Fe-n-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood

An electrocatalyst and thermal polymerization technology, applied in the field of electrocatalysis, to achieve the effects of increased specific surface area, excellent electrocatalytic performance, and increased pores

Active Publication Date: 2021-04-06
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To ensure implementation in practical energy conversion and storage devices, creating highly active, stable and reliable, and low-cost catalysts is highly desirable, but still challenging.

Method used

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  • Preparation method of self-doped Fe-n-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood
  • Preparation method of self-doped Fe-n-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood
  • Preparation method of self-doped Fe-n-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Take about 500mL of fresh pig blood in a 1L beaker, heat and dry in a drying oven at 80°C until constant weight.

[0046] (2) Crush the dried fresh pig blood, pass through a 200-mesh sieve, and take about 1.00 g of the under-sieved powder into the corundum ark.

[0047] (3) Put the corundum ark in a tube furnace for high-temperature pyrolysis, at a heating rate of 10°C / min, high-temperature pyrolysis at 900°C for 60 minutes, and cool to room temperature.

[0048] (4) The pyrolyzed material was pulverized and fully washed with a large amount of mixed solution of deionized water and ethanol, and then freeze-dried (19Pa, -50°C) to obtain a catalyst.

[0049] (5) Electrocatalytic performance test: Weigh 9 mg of the prepared catalyst and a 2.0 mL centrifuge tube with an electronic balance, add 0.99 mL of absolute ethanol and 0.01 mL of 5% Nafion ethanol solution, and sonicate for 20 min-60 min to form a uniform dispersion. Take 10ul of dispersion liquid and drop-coat it...

Embodiment 2

[0052] (1) Take about 500mL of fresh pig blood in a 1L beaker to which 200mL of 50g / L sodium chloride solution has been added in advance, stir and let stand for 30min.

[0053] (2) Boil the pig blood after salting out in a 2.5L beaker with water for 20min, take it out and dry it at 80°C.

[0054] (3) Put the corundum ark in a tube furnace for high-temperature pyrolysis, at a heating rate of 10°C / min, high-temperature pyrolysis at 900°C for 60 minutes, and cool to room temperature.

[0055] (4) The pyrolyzed material was pulverized and fully washed with a large amount of mixed solution of deionized water and ethanol, and then freeze-dried (19Pa, -50°C) to obtain a catalyst.

[0056] (5) Electrocatalytic performance test: perform the performance test according to the method described in step 5 in Example 1, and the specific oxygen reduction catalytic performance is as follows figure 2 As shown, the stability test as image 3 shown. At the same time, the electrocatalytic oxyg...

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Abstract

The invention discloses a method for preparing a self-doped Fe-N-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood. The precursor is obtained by salting out thermal polymerization of animal blood, and the moisture in the precursor is removed for crushing. The pulverized polymerized The powder of the material is placed under an inert atmosphere for high-temperature pyrolysis, and then washed and vacuum freeze-dried to obtain a self-doped Fe-N-C oxygen reduction electrocatalyst; wherein, the salting-out thermal polymerization is directed to animal blood After adding salt, the precipitate is precipitated, and then the precipitate is added to the water and boiled. The salt is sodium chloride or potassium chloride. The catalyst prepared by the invention has excellent electrocatalytic performance for oxygen reduction.

Description

technical field [0001] The invention belongs to the technical field of electrocatalysis, and relates to a method for preparing a self-doped Fe-N-C oxygen reduction electrocatalyst by salting out thermal polymerization of animal blood. Background technique [0002] With the rapid development of contemporary human society, the increasingly serious energy and environmental problems have accelerated the development and utilization of new energy technologies. Fuel cells have attracted much attention in today's society because of their high energy conversion efficiency and environmental friendliness. Compared with the traditional heat engine, its theoretical energy conversion efficiency is as high as 85% to 90%, and the actual energy conversion efficiency is also between 40% and 60%, while the actual efficiency of the heat engine is only 40%. From the perspective of energy saving In other words, fuel cells present enormous advantages. Oxygen reduction reaction is a key step in c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/08H01M4/90
CPCB01J27/24B01J35/0033B01J35/10B01J35/1004B01J37/082H01M4/9091Y02E60/50
Inventor 王宗花陈国栋梁汉璞
Owner QINGDAO UNIV
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