Preparation method and application of transition metal and sulfur-nitrogen co-doped macroporous carbon electrocatalyst

A transition metal and electrocatalyst technology, which is applied to fuel cell type half cells and primary cell type half cells, circuits, electrical components, etc., can solve the problems of high price and rare precious metals, and achieve low price and simple preparation method. , improve the effect of electrocatalytic activity

Active Publication Date: 2021-01-15
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the oxygen reduction reaction (ORR) is a common cathode reaction in fuel cells and metal-air batteries. Considering the activity and stability of the catalyst, the catalysts used for the oxygen reduction reaction (ORR) mainly include Pt and its alloys, but these Precious metals are very rare in nature and expensive

Method used

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  • Preparation method and application of transition metal and sulfur-nitrogen co-doped macroporous carbon electrocatalyst
  • Preparation method and application of transition metal and sulfur-nitrogen co-doped macroporous carbon electrocatalyst
  • Preparation method and application of transition metal and sulfur-nitrogen co-doped macroporous carbon electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of cobalt and sulfur nitrogen co-doped macroporous carbon electrocatalyst, specifically as follows:

[0029] (1) Add 75.0 mg of cobalt chloride hexahydrate and 100.0 mg of D-glucosamine hydrochloride into 30.0 mL of deionized water, and magnetically stir for 2 hours to obtain a dispersion;

[0030] (2) 100.0 mg of thiourea, 3.0 g of sodium chloride and 50.0 mg of graphene were added to the dispersion and magnetically stirred for 2 hours to obtain a mixed material; the thiourea was simultaneously used as a sulfur source and a nitrogen source;

[0031] (3) Stir the resulting mixed material in an oil bath at 80°C for 1 hour to remove deionized water, then put it in a vacuum drying oven and dry it at 60°C for 2 hours, cool to room temperature after drying, and then Grinding to obtain fine particles;

[0032] (4) Under the protection of an inert gas, put the ground fine particles into a quartz boat, place them in a tube furnace, raise the furnace temper...

Embodiment 2

[0034] A preparation method of a macroporous carbon electrocatalyst co-doped with iron and sulfur and nitrogen, specifically as follows:

[0035] (1) Add 100.0 mg of ferric chloride hexahydrate and 200.0 mg of L-citrulline into 30.0 mL of deionized water, and magnetically stir for 3 hours to obtain a dispersion;

[0036](2) 200.0 mg of thiourea, 4.0 g of potassium chloride and 100.0 mg of graphene were added to the dispersion, and magnetically stirred for 5 hours to obtain a mixed material; the thiourea was simultaneously used as a sulfur source and a nitrogen source;

[0037] (3) Stir the resulting mixed material in an oil bath at 60°C for 2 hours to remove deionized water, then put it in a vacuum drying oven and dry it at 80°C for 1 hour, cool to room temperature after drying, and then Grinding to obtain fine particles;

[0038] (4) Under the protection of an inert gas, put the ground fine particles into a quartz boat, place them in a tube furnace, raise the furnace tempera...

Embodiment 3

[0040] A preparation method of cobalt and sulfur nitrogen co-doped macroporous carbon electrocatalyst, specifically as follows:

[0041] (1) Add 225.0 mg of nickel chloride hexahydrate and 300.0 mg of L-cystine into 30.0 mL of deionized water, and magnetically stir for 1 hour to obtain a dispersion;

[0042] (2) 300.0 mg of thiourea, 6.0 g of sodium sulfate and 150.0 mg of graphene were added to the dispersion, and magnetically stirred for 6 hours to obtain a mixed material; the thiourea was simultaneously used as a sulfur source and a nitrogen source;

[0043] (3) Stir the resulting mixed material in an oil bath at 90°C for 1 hour to remove deionized water, then put it in a vacuum drying oven and dry it at 70°C for 2 hours, cool to room temperature after drying, and then Grinding to obtain fine particles;

[0044] (4) Under the protection of an inert gas, put the ground fine particles into a quartz boat, place them in a tube furnace, raise the furnace temperature to 600°C at...

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Abstract

The invention discloses a preparation method and application of a transition metal and sulfur-nitrogen co-doped macroporous carbon electrocatalyst. The preparation method comprises the following stepsof (1) adding transition metal salt and a carbon source into a dispersing agent and stirring to obtain dispersion liquid; (2) adding a sulfur source, a nitrogen source, a template agent and grapheneinto the dispersion liquid, and stirring to obtain a mixed material; (3) heating and stirring the mixed material to remove the dispersing agent, drying, cooling and grinding to obtain fine particles;and (4) calcining, cooling, washing, centrifuging and drying the particles in an inert atmosphere to obtain the transition metal and sulfur-nitrogen co-doped macroporous carbon electrocatalyst. The preparation method of the catalyst is simple, the price is low, and the repeatability is good; the prepared macroporous carbon electrocatalyst has good oxygen reduction performance, the overpotential ofa cathode oxygen reduction reaction can be effectively reduced, and when the electrocatalyst prepared by the invention is used for assembling a liquid electrolyte zinc-air battery, the open-circuit voltage and the constant-current discharge time of the battery exceed those of a commercial Pt / C catalyst.

Description

technical field [0001] The invention relates to the field of new energy material technology and electrochemical catalysis, in particular to a preparation method and application of a macroporous carbon electrocatalyst co-doped with transition metals and sulfur and nitrogen. Background technique [0002] With the continuous development of society, the increasing energy demand of human beings has led to the rapid consumption of fossil fuels. At the same time, the pollution caused by the combustion of fossil fuels has led to serious global environmental problems. In order to alleviate the serious dependence of human beings on natural resources , the exploration of clean and renewable energy technologies is particularly urgent, so scientists have devoted a lot of energy to the research and development of efficient, low-cost and environmentally friendly energy conversion and storage systems. Among them, the oxygen reduction reaction (ORR) is a common cathode reaction in fuel cells...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/8825H01M4/90H01M4/9041H01M4/9083H01M12/06
Inventor 贾海浪赵姣顾磊彭智杰孙选龙包政律李珊珊关明云
Owner JIANGSU UNIV OF TECH
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