A method for preparing high-performance carbon-based catalysts

A carbon-based catalyst, high-performance technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems affecting the activity of carbon-based catalysts, small specific surface area, etc., to achieve reduced content of transition metals, simple preparation process, and reliable performance The effect of regulation

Active Publication Date: 2018-08-31
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, we have prepared nitrogen-doped carbon-based catalysts by pyrolyzing polyaniline-iron coordination polymers [8] , but because the polyaniline iron coordination polymer particles are mainly composed of micron-sized flakes, resulting in a small specific surface area, which affects the activity of carbon-based catalysts after pyrolysis

Method used

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  • A method for preparing high-performance carbon-based catalysts
  • A method for preparing high-performance carbon-based catalysts
  • A method for preparing high-performance carbon-based catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The method for preparing a high-performance carbon-based catalyst:

[0046] (1) First prepare the suspension by coordinating aniline with a transition metal salt; the specific process of the step (1) is:

[0047] 1.1. First, divide 250mL of sulfuric acid solution with a concentration of 1mol / L into two parts (one part is 200mL, the other part is 50mL), and one part (200mL) is added with transition metal salt and stirred until completely dissolved, and then passed into N 2 (N 2 0.1mol aniline was added to liquid A at a temperature of 5°C, and ultrasonicated for 60 minutes until the aniline salt solution was completely reacted; another portion (50 mL) was added Ammonium sulfate, stirred for 60min until completely dissolved, then passed into N 2 (N 2 The feed rate is 5ml / min) for 15 minutes to form liquid B, in which the molar ratio of aniline to transition metal salt is 8:1, and the molar ratio of aniline to ammonium persulfate is 5:1; the transition metal salt is ferr...

Embodiment 2

[0054] The method for preparing a high-performance carbon-based catalyst:

[0055] (1) First prepare the suspension by coordinating aniline with a transition metal salt; the specific process of the step (1) is:

[0056] 1.1. First, divide 250mL of sulfuric acid solution with a concentration of 1mol / L into two parts (one part is 200mL, the other part is 50mL), and one part (200mL) is added with transition metal salt and stirred until completely dissolved, and then passed into N 2 (N 2 0.1mol aniline was added to liquid A at a temperature of 5°C, and ultrasonicated for 60 minutes until the aniline salt solution was completely reacted; another portion (50 mL) was added Ammonium sulfate, stirred for 60min until completely dissolved, then passed into N 2 (N 2 The feed rate is 5ml / min) for 15 minutes to form liquid B, in which the molar ratio of aniline to transition metal salt is 8:1, and the molar ratio of aniline to ammonium persulfate is 5:1; the transition metal salt is ferr...

Embodiment 3

[0062] Embodiment 3 (for the comparative experiment of comparative example 1 and embodiment 2)

[0063] The method for preparing a high-performance carbon-based catalyst:

[0064] (1) First, prepare a suspension by coordinating aniline with a transition metal salt; the specific process of the step (1) is:

[0065] 1.1. First, divide 250mL of sulfuric acid solution with a concentration of 1mol / L into two parts (one part is 200mL, the other part is 50mL), and one part (200mL) is added with transition metal salt and stirred until completely dissolved, and then passed into N 2 (N 2 0.1mol aniline was added to liquid A at a temperature of 5°C, and ultrasonicated for 60 minutes until the aniline salt solution was completely reacted; another portion (50 mL) was added Ammonium sulfate, stirred for 60min until completely dissolved, then passed into N 2 (N 2 The feed rate is 5ml / min) for 15 minutes to form liquid B, in which the molar ratio of aniline to transition metal salt is 8:1...

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Abstract

The invention relates to a method for preparing a high-performance carbon catalyst, and belongs to the technical field of new energy materials. The method comprises the following steps: firstly, carrying out coordination on aniline and a transition metal salt to prepare a suspension liquid; secondly, filtering the prepared suspension liquid to obtain a filter cake, soaking the filter cake with a mixed solution of one or more of ethanol, water, acetone, diethyl ether, methyl alcohol and formaldehyde at any ratio for 15-120 minutes, cleaning the filter cake and then carrying out suction filtration, drying and grinding to obtain a nano dentate polyaniline metal coordination polymer; and finally carrying out thermal treatment on the obtained nano dentate polyaniline metal coordination polymer to prepare the high-performance carbon catalyst under an atmosphere condition. A non-noble metal carbon catalyst prepared by the method is low in price of used raw materials, simple in preparation technology, low in equipment requirement and suitable for large-scale production of the catalyst.

Description

technical field [0001] The invention relates to a method for preparing a high-performance carbon-based catalyst, which belongs to the technical field of new energy materials. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) are considered as ideal clean energy conversion devices due to their high power density, low environmental pollution, low operating temperature, short start-up time, and simple system structure. At present, PEMFCs catalysts mainly use Pt-based catalysts, but Pt resources are scarce and expensive, and the cost problem is the main reason that limits its commercialization. Among them, the oxygen reduction kinetics of the cathode is slow, accounting for 90% of the platinum-based catalysts. [1] , making its cost high and hindering the development of PEMFCs. Therefore, the development of non-precious metal carbon-based catalysts with low cost, high ORR activity and stability is of great significance to promote the commercialization of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8882H01M4/90H01M4/9008Y02E60/50
Inventor 杨喜昆余江英王光华欧阳璇李卫吴佳闵春刚
Owner KUNMING UNIV OF SCI & TECH
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