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A nitrogen-doped ferrous sulfide redox catalyst material and its preparation and application

A catalyst, nitrogen doping technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor stability, scarcity of resources, expensive Pt-based cathode catalysts, etc., and achieve low prices. , high catalytic activity, abundant reserves effect

Active Publication Date: 2021-12-17
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Pt-based cathode catalysts with high catalytic activity are expensive, scarce resources and poor stability

Method used

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  • A nitrogen-doped ferrous sulfide redox catalyst material and its preparation and application
  • A nitrogen-doped ferrous sulfide redox catalyst material and its preparation and application
  • A nitrogen-doped ferrous sulfide redox catalyst material and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

example example 1

[0029] Catalyst preparation

[0030] a, 6.3924g of sodium diethyldithiocarbamate and 1.7973g of ferrous chloride are dissolved in 100mL deionized water, react rapidly to obtain iron diethyldithiocarbamate (II) black precursor precipitate; b 1. Stir the liquid in step a at room temperature for more than 1 hour to allow it to fully precipitate, then use deionized water and absolute ethanol to wash and filter it several times, and dry it in a blast drying oven at 60°C for 12 hours to obtain Black precursor powder;

[0031] c. Put the precursor powder obtained in step b into a sealed tube furnace, and calcinate at 700° C. for 2 hours under an argon atmosphere, and the heating rate is 5° C. / min. Naturally cool down to room temperature to obtain a flower-shaped FeS microsphere catalyst;

[0032] d. Place the FeS powder obtained in step c again in a sealed tube furnace, and calcinate at 400° C. for 1 h under an ammonia atmosphere, and the heating rate is 5° C. / min. After naturally...

example example 2

[0037] Catalyst preparation

[0038] a, 6.3924g of sodium diethyldithiocarbamate and 1.7973g of ferrous chloride are dissolved in 100mL deionized water, react rapidly to obtain iron diethyldithiocarbamate (II) black precursor precipitate; b 1. Stir the liquid in step a at room temperature for more than 1 hour to allow it to fully precipitate, then use deionized water and absolute ethanol to wash and filter it several times, and dry it in a blast drying oven at 60°C for 12 hours to obtain Black precursor powder;

[0039] c. Put the precursor powder obtained in step b into a sealed tube furnace, and calcinate at 700° C. for 2 hours under an argon atmosphere, and the heating rate is 5° C. / min. Naturally cool down to room temperature to obtain a flower-shaped FeS microsphere catalyst;

[0040] d. Place the FeS powder obtained in step c again in a sealed tube furnace, and calcinate at 500° C. for 1 h under an ammonia atmosphere, and the heating rate is 5° C. / min. After naturally...

example example 3

[0044] Catalyst preparation

[0045] e, 6.3924g of sodium diethyldithiocarbamate and 1.7973g of ferrous chloride were dissolved in 100mL of deionized water, reacted quickly to obtain a black precursor precipitate of diethyldithiocarbamate iron (II);

[0046] f. Stir the liquid in step a at room temperature for more than 1 hour to allow it to fully precipitate, then use deionized water and absolute ethanol to wash and filter it several times, and dry it in a blast drying oven at 60°C for 12 hours. Obtain black precursor powder;

[0047] g. Put the precursor powder obtained in step b into a sealed tube furnace, and calcinate at 700° C. for 2 hours under an argon atmosphere, and the heating rate is 5° C. / min. Naturally cool down to room temperature to obtain a flower-shaped FeS microsphere catalyst;

[0048] Electrochemical performance test

[0049] The test method is the same as in Example 1, and the specific rotating disk electrode polarization curve diagram is shown in Fi...

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Abstract

The invention discloses a preparation method of a nitrogen-doped ferrous sulfide (N-FeS) flower-shaped microsphere material and its electrocatalytic oxygen reduction application. In the method, diethyl dithiocarbamate is used as a sulfur source to react with ferrous chloride in an aqueous solution to obtain the precipitation of a sulfur-containing iron-based precursor. The FeS obtained after the sulfidation reaction has a stable morphology, and the flakes are combined to form flower-like microspheres with uniform sizes. The material can be used as an electrocatalyst to catalyze the oxygen reduction reaction, and has high catalytic activity and stability. This synthesis method provides a great possibility for the synthesis of oxygen-reducing electrocatalytic materials with controllable composition and structure, high specific surface area and good durability. At the same time, the synthesis method is simple and easy, the cost is low, it is suitable for large-scale production, and it shows excellent activity and stability in the electrochemical oxygen reduction reaction, and has a good industrial application prospect.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped transition metal sulfide N-FeS flower-like microsphere catalyst and its electrocatalytic application. Background technique [0002] Energy is an important material basis for economic growth and social development. Every epochal change in energy technology is accompanied by a leap in productivity, which promotes the great development and progress of human society. With the increase of population and rapid economic development, the global demand for energy is increasing. Energy crisis and environmental issues have become the important focus and scientific research hotspots in politics, economy, military affairs, diplomacy and other aspects in today's international society. Exploring the development of green and renewable energy technologies can fundamentally remove the dependence on fossil fuels. Therefore, more and more scientific researchers have begun to spare no effort to find and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M4/88B01J27/24
CPCH01M4/90H01M4/8825B01J35/0033B01J27/24Y02E60/50
Inventor 元瑶陈剑
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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