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Hollow Fe/N/C fuel cell oxygen reduction catalyst derived from MOFs (Metal Organic Frameworks), and preparation method thereof

A fuel cell and catalyst technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of large amount of precious metals, low catalyst utilization, low catalytic activity, etc., and achieves simple preparation process, which is conducive to large-scale production, high The effect of catalytic activity

Inactive Publication Date: 2019-03-08
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hollow Fe / N / C fuel cell oxygen reduction catalyst derived from MOFs and its preparation in order to overcome the technical problems of traditional Pt / C catalysts, such as large amount of noble metal, low catalyst utilization rate, and low catalytic activity. method

Method used

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  • Hollow Fe/N/C fuel cell oxygen reduction catalyst derived from MOFs (Metal Organic Frameworks), and preparation method thereof
  • Hollow Fe/N/C fuel cell oxygen reduction catalyst derived from MOFs (Metal Organic Frameworks), and preparation method thereof
  • Hollow Fe/N/C fuel cell oxygen reduction catalyst derived from MOFs (Metal Organic Frameworks), and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A method for preparing an oxygen reduction catalyst for a hollow Fe / N / C fuel cell derived from MOFs, the specific steps are as follows:

[0034] (1) Preparation of PS pellet template

[0035] Measure 21ml of styrene, 1.1ml of acrylic acid, 0.92ml of methyl methacrylate, and weigh 0.49g of ammonium bicarbonate and add it, and dissolve the mixture in 100ml of ultrapure water (H 2 (0), heat up to 70°C, add 0.53g ammonium persulfate, heat up to 80°C, stir for 12 hours, after the liquid in the flask is cooled, centrifuge at 8000rpm, then wash several times with a large amount of ultrapure water, freeze-dry for backup use.

[0036] (2) Preparation of Fe / N / C catalyst precursor

[0037]Weigh 594.98mg of zinc nitrate, 20.20mg of ferric nitrate and 691.28mg of 2-methylimidazole, and weigh 200mg of the product in step (1). Zinc nitrate and ferric nitrate were placed in a three-necked round-bottomed flask (referred to as bottle 1), and 2-methylimidazole and PS pellet templates w...

Embodiment 2

[0044] A method for preparing an oxygen reduction catalyst for a hollow Fe / N / C fuel cell derived from MOFs, the specific steps are as follows:

[0045] (1) Preparation of PS pellet template

[0046] Measure 20ml of styrene, 1ml of acrylic acid, 0.9ml of methyl methacrylate, and weigh 0.4g of ammonium bicarbonate and add it, and dissolve the mixture in 100ml of ultrapure water (H 2 (0), heat up to 50°C, add 0.5g ammonium persulfate, heat up to 90°C, stir for 6h, after the liquid in the flask is cooled, centrifuge at 8000rpm, then wash several times with a large amount of ultrapure water, freeze-dry for backup use.

[0047] (2) Preparation of Fe / N / C catalyst precursor

[0048] Weigh 297.49mg of zinc nitrate, 40.40mg of ferric nitrate and 328.4mg of 2-methylimidazole, and weigh 50mg of the product in step (1). Zinc nitrate and ferric nitrate were placed in a three-necked round-bottomed flask (referred to as bottle 1), and 2-methylimidazole and PS pellet templates were placed i...

Embodiment 3

[0052] A method for preparing an oxygen reduction catalyst for a hollow Fe / N / C fuel cell derived from MOFs, the specific steps are as follows:

[0053] (1) Preparation of PS pellet template

[0054] Measure 25ml of styrene, 1.5ml of acrylic acid, 1ml of methyl methacrylate, and weigh 0.5g of ammonium bicarbonate into it, and dissolve the mixture in 100ml of ultrapure water (H 2 (0), heat up to 60°C, add 0.6g of ammonium persulfate, heat up to 100°C, stir for 24 hours, after the liquid in the flask is cooled, centrifuge at 8000rpm, wash with a large amount of ultrapure water several times, freeze-dry for backup use.

[0055] (2) Preparation of Fe / N / C catalyst precursor

[0056] Weigh 297.49mg of zinc nitrate, 101.00mg of ferric nitrate and 1313.6mg of 2-methylimidazole, and weigh 500mg of the product in step (1). Zinc nitrate and ferric nitrate were placed in a three-necked round-bottomed flask (referred to as bottle 1), and 2-methylimidazole and PS pellet templates were pla...

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PUM

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Abstract

The invention relates to a hollow Fe / N / C fuel cell oxygen reduction catalyst derived from MOFs (Metal Organic Frameworks), and a preparation method thereof. The method comprises the following steps that: adopting a PS (Polystyrene) small sphere to serve as a template, taking 2-methylimidazole and Zn(NO3)2.6H2O as an MOFs ligand, using low-price Fe(NO3)3.9H2O as a metal source, and adopting a high-temperature calcination method to prepare the Fe / N / C hollow-structure catalyst with high catalytic activity for oxygen reduction reaction. Compared with the prior art, the catalyst has the advantagesof higher stability and methyl alcohol resistance, low raw material price, rich source, simple preparation process and high practical value and is favorable for scale production.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a hollow Fe / N / C fuel cell oxygen reduction catalyst derived from MOFs and a preparation method thereof. Background technique [0002] With the continuous development of human society, the energy crisis is gradually emerging, and it is imminent to develop a clean and efficient energy industry. A low-temperature fuel cell is an energy conversion device that directly converts the chemical energy of fuel into electrical energy. It has the advantages of abundant fuel sources, low price, safe and convenient portability and storage, and high energy density. It is considered to be an ideal portable power supply for civilian and military use. and vehicle power supplies. However, there are still many challenges for fuel cells to go to the market: high catalyst cost, low utilization rate, catalyst poisoning by methanol permeation, and difficulties in water management. Among them, the ...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/86H01M4/90
CPCH01M4/8605H01M4/8652H01M4/88H01M4/9041H01M4/9083Y02E60/50
Inventor 李巧霞马雨蒙李朋伟田明华罗莎莎
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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