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Waste tire pyrolytic carbon catalyst, preparation method and application

A technology for waste tires and waste tire particles, which is applied in the field of high-efficiency electrolytic water hydrogen evolution reaction catalyst and its preparation, and electrolytic water hydrogen evolution reaction. Simple, responsive effects

Active Publication Date: 2022-02-15
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrolysis process often has problems such as high overpotential, high energy consumption, and low current density. Therefore, the development of an efficient and stable electrocatalyst is the key to the process research.

Method used

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  • Waste tire pyrolytic carbon catalyst, preparation method and application
  • Waste tire pyrolytic carbon catalyst, preparation method and application
  • Waste tire pyrolytic carbon catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the high-efficiency hydrogen evolution electrocatalyst for the pyrolysis of waste tires in this example is as follows:

[0030] Fully mix the crushed waste tire particles and ammonium chloride at a mass ratio of 1:6, place them in a tube furnace, and heat them to 400°C at a heating rate of 1°C / min under a nitrogen atmosphere, and maintain them for 2 hours. Continue heating to 900°C at a heating rate of 2°C / min and maintain it for 2h, then use 2M HCl-20wt% HF to treat at 30°C for 12h, wash and dry to obtain the required pyrolysis carbon catalyst, mainly including mass The fraction is about 94.84% C, 2.22% S and 2.94% N, and the specific surface area is about 85m 2 / g.

[0031] The glassy carbon electrode was polished to a smooth surface with 0.05 μm alumina polishing powder, and then dried naturally for use. At the same time, 5 mg of the prepared catalyst was weighed, and after adding 5 wt % Nafion solution (30 μL) and ethanol (970 μL), the mi...

Embodiment 2

[0033] The preparation method of the high-efficiency hydrogen evolution electrocatalyst for the pyrolysis of waste tires in this example is as follows:

[0034]Fully mix the crushed waste tire particles and ammonium chloride at a mass ratio of 1:4, place them in a tube furnace, and heat them to 400°C at a heating rate of 0.5°C / min under a nitrogen atmosphere for 2 hours. Continue heating to 900°C at a heating rate of 2°C / min and maintain for 2h, then use 1M HCl-10wt% HF to treat at 60°C for 12h, wash, dry and cool to room temperature to obtain the required pyrolysis carbon catalyst. It mainly includes about 95.15% C by mass fraction, 2.23% S and 2.65% N, and the specific surface area is about 60m 2 / g.

[0035] The electrochemical performance measurement results show that the waste tire pyrolysis carbon electrocatalyst shows good catalytic performance for the hydrogen evolution reaction of electrolyzed water, and the current density is up to 134mA in the range of reduction po...

Embodiment 3

[0037] The preparation method of the high-efficiency hydrogen evolution electrocatalyst for the pyrolysis of waste tires in this example is as follows:

[0038] Fully mix the crushed waste tire particles and ammonium chloride at a mass ratio of 1:10, place them in a tube furnace, and heat them to 450°C at a heating rate of 1°C / min under a nitrogen atmosphere for 2 hours. Continue heating to 900°C at a heating rate of 2°C / min, and maintain it for 2h, then use 2MHCl-20wt%HF to treat at 60°C for 8h, wash, dry and cool to room temperature to obtain the required pyrolysis carbon catalyst. It mainly includes about 95% C by mass fraction, 2.15% S and 2.85% N, and the specific surface area is about 79m 2 / g.

[0039] The electrochemical performance measurement results show that the waste tire pyrolysis carbon electrocatalyst shows good catalytic performance for the hydrogen evolution reaction of electrolyzed water, and the current density is up to 290mA in the range of reduction pote...

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Abstract

The invention discloses a waste tire pyrolytic carbon catalyst as well as a preparation method and application thereof. Crushed waste tire particles are taken as a raw material to be fully mixed with ammonium chloride, then temperature programming heat treatment is performed in an inert atmosphere, and HCl-HF mixed acid treatment and secondary heat treatment are performed to prepare the pyrolytic carbon catalyst. When the catalyst is used as a cathode material to be applied to a hydrogen evolution reaction of hydrogen production by electrolysis of water, the catalyst shows ultrahigh catalytic performance, the maximum current density is 350m A.Cm<-2> in a reduction potential range of-0.55 to-0.1 V(vs.RHE), and when the current density is 10m A.Cm<-2> and 100m A.Cm<-2>, the over potential is only 330 mV and 440 mV. The raw materials required by the method are wide in source and low in price, the preparation process is simple, the reaction conditions are easy to control, the reaction performance is excellent, the additional value of the waste tire pyrolytic carbon is improved, the strategic requirements of energy conservation and emission reduction are met, and the catalyst is suitable for batch production.

Description

technical field [0001] The invention belongs to the field of new energy material technology and electrochemical catalysis, relates to electrolytic water hydrogen evolution reaction, in particular to a high-efficiency electrolytic water hydrogen evolution reaction catalyst and its preparation method and application. Background technique [0002] With the increasing consumption of traditional fossil fuels, the energy crisis and environmental pollution are becoming more and more serious, the development of new clean renewable energy and efficient energy preparation technology is imminent. [0003] In recent years, hydrogen energy has become an ideal alternative energy source with the most development potential in the 21st century due to its high energy density, environmental friendliness and non-pollution. Among various hydrogen production technologies, the electrocatalytic water splitting hydrogen production technology has the advantages of reproducibility, high product purity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04C01B32/05
CPCC25B11/091C25B1/04C01B32/05Y02E60/36Y02P20/10
Inventor 平丹吴诗德易峰刘卫涛毛文政陈亚伟韩莉锋王诗文方少明
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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