Preparation method and application of CoN/Ti3C2 material with foamed nickel as substrate

A nickel foam and substrate technology, applied in the field of Ti3C2 composite materials, can solve the problems of platinum scarcity, high price, poor stability, etc., and achieve the effect of reducing charge transfer resistance, good morphology and structure, and mild preparation conditions

Active Publication Date: 2022-04-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although platinum-based catalysts have the most outstanding catalytic activity, they are not only less stable, but also platinum is scarce, has less reserves, and is expensive

Method used

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  • Preparation method and application of CoN/Ti3C2 material with foamed nickel as substrate
  • Preparation method and application of CoN/Ti3C2 material with foamed nickel as substrate
  • Preparation method and application of CoN/Ti3C2 material with foamed nickel as substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Pretreatment of nickel foam:

[0036] Cut the nickel foam into a square shape with a size of 1cm*1cm and wait for treatment; dilute the acetic acid in the laboratory to 3mol / L, so that the nickel foam is ultrasonically treated with acetic acid, absolute ethanol, and deionized water (all volumes are 20ml) for 10 minutes respectively To remove impurities on the surface of nickel foam.

[0037] 2. The method of physical mixing is used to prepare Ti-containing 3 C 2 The solution:

[0038] 3mmol Ti 3 C 2 (about 0.192 g) was added to 10 ml of deionized water and sonicated at 25° C. for 30 minutes until uniformly mixed.

[0039] 3. Preparation of CoN precursor

[0040] Mix 12ml of distilled water and 12ml of ethylene glycol evenly, then weigh 3mmol of urea (about 0.18g), 3mmol of cobalt nitrate hexahydrate (about 0.873g), and 3mmol of CTAB (about 1.093g) into the above-mentioned solution in sequence, and stirred at room temperature for 30 min under the action of a ma...

Embodiment 2

[0046] 1. Pretreatment of nickel foam:

[0047] Cut the nickel foam into a square shape with a size of 1cm*1cm and wait for treatment; dilute the acetic acid in the laboratory to 3mol / L, so that the nickel foam is ultrasonically treated with acetic acid, absolute ethanol, and deionized water (all volumes are 20ml) for 10 minutes respectively To remove impurities on the surface of nickel foam.

[0048] 2. The method of physical mixing is used to prepare Ti-containing 3 C 2 The solution:

[0049] 2mmol Ti 3 C 2 (about 0.128 g) was added into 10 ml of deionized water, and ultrasonically treated at 25° C. for 30 minutes until the mixed solution was ultrasonically oscillated until uniformly mixed.

[0050] 3. Preparation of CoN precursor

[0051] Mix 12ml of distilled water and 12ml of ethylene glycol evenly, then weigh 3mmol of urea (about 0.18g), 3mmol of cobalt nitrate hexahydrate (about 0.873g), and 3mmol of CTAB (about 1.093g) into the above-mentioned solution in sequenc...

Embodiment 3

[0057] 1. Pretreatment of nickel foam:

[0058] Cut the nickel foam into a square shape with a size of 1cm*1cm and wait for treatment; dilute the acetic acid in the laboratory to 3mol / L, so that the nickel foam is ultrasonically treated with acetic acid, absolute ethanol, and deionized water (all volumes are 20ml) for 10 minutes respectively To remove impurities on the surface of nickel foam.

[0059] 2. The method of physical mixing is used to prepare Ti-containing 3 C 2 The solution:

[0060] 2mmol Ti 3 C 2 (about 0.128 g) was added into 10 ml of deionized water, and ultrasonically treated at 25° C. for 30 minutes until the mixed solution was ultrasonically oscillated until uniformly mixed.

[0061] 3. Preparation of CoN precursor

[0062] Mix 12ml of distilled water and 12ml of ethylene glycol evenly, then weigh 3mmol of urea (about 0.18g), 3mmol of cobalt nitrate hexahydrate (about 0.873g), and 2mmol of CTAB (about 0.7289g) and add them to the above-mentioned solutio...

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Abstract

The invention relates to a preparation method and application of a CoN/Ti3C2 material with foamed nickel as a substrate. The method is realized by controlling the ratio of three raw materials of cobalt and nitrogen, the preparation of a titanium carbide aqueous solution and the hydrothermal temperature and time. The preparation method comprises the following steps: firstly, synthesizing two solutions containing CoN and Ti3C2 respectively through physical mixing, then loading two substances of cobalt and nitrogen and Ti3C2 onto foamed nickel through a one-step hydrothermal method, and finally, stripping the foamed nickel through ultrasonic waves to prepare the catalyst. The initial potential and the half-wave potential of the obtained material are close to those of commercial platinum carbon, the material has high limiting current density, but the price of the material is only 20-30% of that of the commercial platinum carbon, the material has better market application prospects, and when the material is applied to ORR, the obtained catalytic material has good oxygen reduction catalytic activity and wide application prospects.

Description

technical field [0001] The invention belongs to Ti 3 C 2 The technical field of composite materials, especially related to nickel foam as a growth substrate, more specifically to a CoN / Ti substrate with nickel foam 3 C 2 Materials preparation methods and applications for oxygen reduction. Background technique [0002] With the advent of the global energy crisis and the increasing environmental pollution and greenhouse effect caused by the burning of fossil fuels, the development of clean energy is imminent. People are paying more and more attention to the storage and conversion of sustainable energy, and fuel cells, as one of the most promising clean energy converters, have high research value. In a fuel cell, fuel is oxidized at the anode, and the released electrons are transferred through an external circuit to the cathode, where oxygen is reduced. However, due to the oxygen reduction to four-electron reaction, the kinetics are very slow, which greatly limits the ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y30/00B82Y40/00
CPCY02E60/50
Inventor 张文林段艳菊杨德新刘仕萌余文杰何婷婷于丰收李春利
Owner HEBEI UNIV OF TECH
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