Preparation method of non-noble metal oxygen reduction catalyst

A non-precious metal and catalyst technology, applied in the field of electrochemical catalytic energy materials, to achieve good oxygen reduction activity, avoid agglomeration, and improve the effect of low catalyst activity

Pending Publication Date: 2022-06-28
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Table 1. Catalytic performance of each iron-based catalyst in the prior art under 0.1M potassium hydroxide basic condition and 0.5M sulfuric acid (or 0.1M perchloric acid) acidic condition

Method used

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  • Preparation method of non-noble metal oxygen reduction catalyst
  • Preparation method of non-noble metal oxygen reduction catalyst
  • Preparation method of non-noble metal oxygen reduction catalyst

Examples

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Effect test

Embodiment 1

[0038] A preparation method of a non-precious metal oxygen reduction catalyst, the specific operation steps are as follows:

[0039] (1) Put 0.5 g of 2,4,6-tris(2-pyridyl)-1,3,5-triazine in a beaker, add 50 ml of absolute ethanol, stir until completely dissolved (solution A), weigh Take 0.254g of 1,8-diaminonaphthalene and add it to solution A until it is completely dissolved (solution B), then weigh 0.96g of ferrous chloride tetrahydrate and dissolve it in 20 ml of absolute ethanol to obtain a ferrous chloride solution, Namely solution C, solution C was added to solution B at one time, and the polymerization reaction was carried out with magnetic stirring at room temperature for 12 hours to form a black precipitate; The molar ratio of 1,3,5-triazine is 1:3;

[0040] (2) vacuum filtration of the obtained black precipitate after the reaction in step (1), the collected precipitate was added into a 100-milliliter ball-milling jar, 25 grams of sodium chloride metal salt was added...

Embodiment 2

[0050] A preparation method of a non-precious metal oxygen reduction catalyst, the specific operation steps are as follows:

[0051] (1) Put 0.5 g of 2,4,6-tris(2-pyridyl)-1,3,5-triazine in a beaker, add 50 ml of absolute ethanol, stir until completely dissolved (solution A), weigh Take 0.254g of 1,8-diaminonaphthalene and add it to solution A until it is completely dissolved (solution B), then weigh 1.14g of cobalt chloride tetrahydrate and dissolve it in 20 ml of absolute ethanol to obtain a cobalt chloride solution, that is, a solution C, the solution C is added to the solution B at one time, and the polymerization reaction is carried out with magnetic stirring at room temperature for 10 hours to generate a dark green precipitate; wherein, the molar ratio of the cobalt ion in the solution C to the pyridine ring nitrogen-containing transition metal ligand is 1:3;

[0052] (2) vacuum filtration of the obtained dark green precipitate after the reaction in step (1), collect the...

Embodiment 3

[0057] A preparation method of a non-precious metal oxygen reduction catalyst, the specific operation steps are as follows:

[0058] (1) Put 0.5 g of 2,4,6-tris(2-pyridyl)-1,3,5-triazine in a beaker, add 50 ml of absolute ethanol, stir until completely dissolved (solution A), weigh Take 0.173g m-phenylenediamine and add it to solution A, until it is completely dissolved (solution B), then weigh 1.14g of ferrous chloride tetrahydrate and dissolve it in 20 ml of absolute ethanol to obtain a ferrous chloride solution, namely solution C , the solution C was added to the solution B at one time, and the polymerization reaction was carried out with magnetic stirring at room temperature for 10 hours to form a dark green precipitate; The molar ratio of 3,5-triazine is 1:3;

[0059] (2) vacuum filtration of the obtained dark green precipitate after the reaction in step (1), collecting the precipitate and adding in 100 milliliters of ball mill jars, adding 25 grams of sodium chloride me...

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Abstract

The preparation method comprises the following steps: (1) adding a pyridine ring nitrogen-containing transition metal ligand into a solution, stirring until the pyridine ring nitrogen-containing transition metal ligand is completely dissolved, adding a diamino heterocyclic compound until the diamino heterocyclic compound is completely dissolved, and adding a metal salt solution into the previous solution for polymerization reaction; (2) adding sodium chloride metal salt, mixing, ball-milling and drying; (3) introducing protective gas, heating, cooling, and carrying out first heat treatment; (4) acid pickling, suction filtration, water cleaning and drying, and (5) secondary heat treatment which is the same as the step (3) to obtain the non-noble metal oxygen reduction catalyst. The non-noble metal monatomic oxygen reduction catalyst prepared by the method disclosed by the invention has good oxygen reduction activity in 1.0 M potassium hydroxide, the peak potential is only 1.03 V, the half-wave point reaches 0.9 V in 3mA cm < 2 >, and the half-wave is 0.8 V in a 0.5 M sulfuric acid solution.

Description

technical field [0001] The invention relates to the technical field of electrochemical catalytic energy materials, in particular to a preparation method of a non-precious metal oxygen reduction catalyst. Background technique [0002] With the increasing reduction of fossil energy and the aggravation of environmental pollution, the development and utilization of new energy is highly valued by human beings. Hydrogen energy is highly efficient, clean and has high energy density. It is known as the "ultimate energy source" in the 21st century and is the strategic energy development direction of mankind. As a conversion device for hydrogen energy, proton exchange membrane fuel cell is an ideal alternative power source for electric vehicles and portable power sources in the future because of its high energy conversion efficiency and environmental friendliness, and has great commercial value. However, the process of oxygen reduction reaction at the cathode of proton exchange membr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/88H01M4/90H01M4/9041
Inventor 田植群向学张潇然王坤沈培康
Owner GUANGXI UNIV
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