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Preparing method for heteroatom-doped carbon-loaded cobalt catalyst

A technology of cobalt catalyst and heteroatom, which is applied in the field of preparation of heteroatom-doped carbon-supported cobalt catalyst, can solve the problems of poor cobalt catalytic performance and lack of cobalt resources, and achieve high catalytic activity and simple process

Inactive Publication Date: 2017-08-18
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor catalytic performance of cobalt and the lack of cobalt resources in my country, improving the catalytic performance of cobalt and reducing the amount of cobalt are the main research directions of cobalt-based catalysts.

Method used

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  • Preparing method for heteroatom-doped carbon-loaded cobalt catalyst
  • Preparing method for heteroatom-doped carbon-loaded cobalt catalyst
  • Preparing method for heteroatom-doped carbon-loaded cobalt catalyst

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preparation example Construction

[0011] The present invention is a kind of preparation method of heteroatom-doped carbon-supported cobalt catalyst, and its steps are:

[0012] Mix the ionic liquid and cobalt salt in a crucible according to the mass ratio of 5:1-50:1, heat up to 100-600°C for 10-60min in a tube furnace under the protection of an inert gas, and then continue to heat up to 650- Keeping the temperature at 1000° C. for 60-360 minutes, and cooling to room temperature to obtain a heteroatom-doped carbon-supported cobalt catalyst.

[0013] In the preparation method described above, the ionic liquid is 1-butyl-3-methylimidazolium dihydrogen phosphate, or 1-butyl-3-methylimidazolium tetrafluoroborate, or 1-butyl -3-Methylimidazole dinitrile amine salt, or 1-butyl-3-methylimidazole bistrifluoromethane yellow imide salt, or 1-octyl-3-methylimidazole dihydrogen phosphate, or 1-octyl Base-3-methylimidazole tetrafluoroborate, or 1-octyl-3-methylimidazole dinitrile amine salt, or 1-octyl-3-methylimidazole b...

Embodiment 1

[0017] Add 50g of 1-butyl-3-methylimidazolium tetrafluoroborate and 1g of cobalt acetate mixture into the crucible, then put it into a tube furnace, and under the protection of argon, heat it to 300°C for calcination and keep it for 30min, then continue to heat up to Insulate at 700°C for 60 minutes, then cool to room temperature to prepare N and B doped carbon-supported cobalt catalysts.

Embodiment 2

[0019] Add 20g of 1-butyl-3-methylimidazolium dihydrogen phosphate and 2g of cobalt acetate mixture into the crucible, then put it into a tube furnace, and under the protection of argon, heat to 200°C and keep it for 30min, then continue to heat up to 700°C Keeping it warm for 60 minutes, cooling to room temperature, and preparing N, P co-doped carbon-supported cobalt catalyst.

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Abstract

The invention discloses a preparing method for a heteroatom-doped carbon-loaded cobalt catalyst. The preparing method includes the steps that ionic liquid and cobalt salt are mixed to be put into a crucible and then put into a tubular furnace, and under protection of inert gas, the temperature is increased to be 100 DEG C to 600 DEG C, and is kept for 10 min to 60 min; then the temperature continues to increase to be 650 DEG C to 1,000 DEG C, and is kept for 60 min to 360 min, the temperature is cooled to be the room temperature, and the heteroatom-doped carbon-loaded cobalt catalyst is prepared. According to the preparing method for the heteroatom-doped carbon-loaded cobalt catalyst, the one-step pyrolysis synthesis method is adopted, the method is simple, a matrix comprises heteroatom-doped carbon materials such as N, O, P, S and B, cobalt particles in the carbon matrix are nanometer particles and are high in dispersibility, the heteroatom content and the cobalt loading amount in the carbon matrix are adjustable, and the catalytic performance can be obviously improved through the heteroatom-doped and evenly-dispersed cobalt nanometer particles.

Description

technical field [0001] The invention relates to the preparation technology of the catalyst, in particular to the preparation technology of the heteroatom-doped carbon-supported cobalt catalyst. Background technique [0002] Oxygen reduction reaction has always been the focus of research in the field of electrochemistry. The redox reaction itself is relatively slow, and a catalyst needs to be added to promote the reaction. At present, platinum-based materials are the materials with the best oxygen reduction catalytic activity, but their high price and poor stability limit their applications. Therefore, it is of great significance to prepare a catalyst with catalytic activity comparable to that of platinum-based materials, good stability and low price. At present, the main oxygen reduction catalysts mainly include metals, metal oxides and doped carbon materials. [0003] Metal cobalt has attracted extensive research due to its high oxygen reduction activity and stability in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J37/082
Inventor 蒙延双肖明军朱福良王功瑞段超宇杜梦奇王琛王磊夏军
Owner LANZHOU UNIVERSITY OF TECHNOLOGY