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Preparation method of catalyst for catalyzing cathodic reaction of fuel cell

A fuel cell cathode and catalyst technology, applied in fuel cells, battery electrodes, circuits, etc., can solve the problems of instability, poor selectivity and stability, and high catalyst cost, and achieve the effects of low cost, simple operation and high catalytic activity.

Active Publication Date: 2019-03-19
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high cost, instability, poor selectivity and stability of current fuel cell cathode catalysts, and to provide a method for preparing a catalyst for catalyzing fuel cell cathode reactions

Method used

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  • Preparation method of catalyst for catalyzing cathodic reaction of fuel cell
  • Preparation method of catalyst for catalyzing cathodic reaction of fuel cell
  • Preparation method of catalyst for catalyzing cathodic reaction of fuel cell

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specific Embodiment approach 1

[0019] Specific embodiment one: what this embodiment records is a kind of preparation method of the catalyst that is used to catalyze the cathode reaction of fuel cell, and the specific steps of described method are as follows:

[0020] At room temperature, mix the ionic liquid and melamine according to the mass ratio of 0.3-2.0:1, put it in an agate mortar and grind it evenly, then put it in an alumina porcelain boat, put it in a tube furnace, and heat it in an argon atmosphere. , heated to 550°C and kept for 3h, then raised to 900°C and calcined for 2h, then naturally cooled to room temperature, the catalyst for catalyzing the cathode reaction of the fuel cell was obtained, expressed as CM x -900 (mass ratio of x=ILs / MA, where ILs is a conventional expression used in literature in the art, meaning ionic liquid, 900 represents the calcination temperature, and CM represents carbon material). In the present invention, melamine acts as a source of carbon and nitrogen and plays a...

specific Embodiment approach 2

[0021] Specific embodiment two: the preparation method of a kind of catalyst that is used to catalyze fuel cell cathode reaction described in specific embodiment one, described ionic liquid is 1-n-butyl-3-methylimidazolium hexafluorophosphate (Bmim PF 6 ), with ionic liquid as P, F heteroatom source.

specific Embodiment approach 3

[0022] Specific embodiment three: the preparation method of a catalyst used to catalyze the cathode reaction of a fuel cell described in specific embodiment one, the first temperature rise is from room temperature to 550 °C at a temperature increase rate of 5 °C / min, and the second time The heating rate is 10°C / min.

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Abstract

The invention discloses a preparation method of a catalyst for catalyzing a cathodic reaction of a fuel cell and belongs to the technical field of carbon material preparation. The method is as follows: mixing an ionic liquid with melamine at room temperature according to a certain mass ratio, carrying out uniform grinding, then, placing the ionic liquid with melamine into a tube furnace, raising the temperature to 550 DEG C at an argon atmosphere, keeping the temperature for 3 h, then, raising the temperature to 900 DEG C, and carrying out calcination for 2 h, and then, naturally cooling to room temperature to obtain the catalyst for catalyzing the cathodic reaction of the fuel cell. The preparation method has the advantages that the preparation method is simple in operation and low cost,and the prepared heteroatom doped carbon material is used in a cathodic catalyst material in the fuel cell. The method disclosed by the invention is easy to implement, and instruments for experimentsare simple. The N,P,F-doped carbon material is prepared by a calcination reaction in which melamine is used as a C and N source and an ionic liquid BmimPF6 is used as a P and F heteroatom source, andthe N,P,F-doped carbon material is used as a nonmetal cathodic oxygen reduction catalyst.

Description

technical field [0001] The invention belongs to the technical field of carbon material preparation, and in particular relates to a method for preparing a catalyst for catalyzing the cathode reaction of a fuel cell. Background technique [0002] Fossil fuels have brought about environmental pollution and energy crisis while bringing prosperous economy and fast life to human beings. In order to pursue clean new energy, fuel cells are considered to be green, environmentally friendly, low-emission and the most likely alternative in this century. One of the energy technologies that depletes fossil fuels. However, the fuel cell core reaction-O 2 The oxygen reduction reaction (ORR) kinetics on the cathode catalyst is very slow and needs to be catalyzed by an efficient catalyst to occur relatively quickly. At present, the most active ORR electrocatalysts are still Pt-based catalysts, which are expensive, have limited reserves, poor selectivity and stability, and fuel cells have no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M8/083
CPCH01M4/8882H01M4/9008H01M8/083H01M2004/8684H01M2300/0014Y02E60/50
Inventor 崔凤娟邓庆芳徐蕾王环宇赵桦萍王政军
Owner QIQIHAR UNIVERSITY