An iron-based catalyst for alkaline fuel cell and a preparation method thereof

An iron-based catalyst and fuel cell technology, applied to battery electrodes, circuits, electrical components, etc., can solve the problems of unsatisfactory catalytic efficiency, complicated preparation process, and low catalytic activity, and achieve improved catalytic decomposition ability, simple preparation process, The effect of improving catalytic activity

Inactive Publication Date: 2018-12-18
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] It can be seen that the preparation process of platinum-based and other noble metal catalysts used in alkaline fuel cells in the prior art is complicated, the cost is high, and it is difficult to be widel

Method used

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  • An iron-based catalyst for alkaline fuel cell and a preparation method thereof

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Example Embodiment

[0030] Example 1

[0031] a. Add multi-walled carbon nanotube powder, glucose and sodium lauryl sulfonate into deionized water, stir and mix, and ultrasonically disperse to obtain a black suspension;

[0032] b. Add ferric nitrate to the black suspension obtained in step a, seal the solution after slight stirring, perform heat treatment, and further perform centrifugal separation, washing, and drying to obtain iron-based multi-walled carbon nanotube powder;

[0033] c. Place the iron-based multi-walled carbon nanotube powder prepared in step b in a vacuum furnace, and use a gas-loaded nitrogen source to perform high-temperature plasma heat treatment to prepare a modified iron-based catalyst.

[0034] In step a, the stirring speed is 250r / min, the frequency of ultrasonic dispersion is 70kHz, and the time is 30min; in step b, the speed of light stirring is 25r / min and the time is 2min, stirring in the same direction, and the heat treatment temperature is 200°C , The time is 12h; in step...

Example Embodiment

[0036] Example 2

[0037] a. Add multi-walled carbon nanotube powder, glucose and sodium lauryl sulfonate into deionized water, stir and mix, and ultrasonically disperse to obtain a black suspension;

[0038] b. Add ferric nitrate to the black suspension obtained in step a, seal the solution after slight stirring, perform heat treatment, and further perform centrifugal separation, washing, and drying to obtain iron-based multi-walled carbon nanotube powder;

[0039] c. Place the iron-based multi-walled carbon nanotube powder prepared in step b in a vacuum furnace, and use a gas-loaded nitrogen source to perform high-temperature plasma heat treatment to prepare a modified iron-based catalyst.

[0040] In step a, the stirring speed is 200r / min, the frequency of ultrasonic dispersion is 60kHz, and the time is 40min; in step b, the speed of light stirring is 20r / min and the time is 3min, stirring in the same direction, and the heat treatment temperature is 180°C , The time is 15h; in step...

Example Embodiment

[0042] Example 3

[0043] a. Add multi-walled carbon nanotube powder, glucose and sodium lauryl sulfonate into deionized water, stir and mix, and ultrasonically disperse to obtain a black suspension;

[0044] b. Add ferric nitrate to the black suspension obtained in step a, seal the solution after slight stirring, perform heat treatment, and further perform centrifugal separation, washing, and drying to obtain iron-based multi-walled carbon nanotube powder;

[0045] c. Place the iron-based multi-walled carbon nanotube powder prepared in step b in a vacuum furnace, and use a gas-loaded nitrogen source to perform high-temperature plasma heat treatment to prepare a modified iron-based catalyst.

[0046] In step a, the stirring speed is 300r / min, the frequency of ultrasonic dispersion is 80kHz, and the time is 20min; in step b, the rotation speed of light stirring is 30r / min and the time is 2min, and the stirring should be in the same direction, and the heat treatment temperature is 200 ℃...

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Abstract

The invention discloses an iron-based catalyst of an alkaline fuel cell and a preparation method thereof. The iron-based catalyst is prepared from the following steps: a, adding multi-wall carbon nanotube powder, glucose and sodium dodecyl sulfonate into deionized water, and mixing to obtain black suspension; B, adding ferric nitrate into the suspension, and heat treating to obtain the multi-wallcarbon nanotube powder loaded with iron base; (c) heat treat that powder plasma at a high temperature to prepare a modified iron-based catalyst. The method has the following beneficial effects: the interaction of C and Fe-N-C promotes the adsorption of oxygen molecules, thus effectively improves the catalytic decomposition ability of the catalyst for oxygen, improves the catalytic activity of thecatalyst, and has the advantages of simple preparation process, low cost, both high catalytic activity and low preparation cost, and has a very broad prospect in the industrial application of fuel cells.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the preparation of catalysts, in particular to an iron-based catalyst for alkaline fuel cells and a preparation method. Background technique [0002] A fuel cell is an electrochemical energy storage device that can directly convert chemical energy stored in fuel and oxygen into electrical energy. It has the advantages of high efficiency, greenness, and safety, and is considered to be a new energy star in the 21st century. Among the many types of fuel cells, alkaline fuel cell technology is the most mature. The electrolyte used is an aqueous solution or a stable potassium hydroxide matrix, and the electrochemical reaction is also slightly different from the movement of hydroxyl groups (-OH) from the cathode to the anode to react with hydrogen to form water and electrons. A resurgence in alkaline fuel cell research has come to the fore in recent years. [0003] The research on the catho...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9041H01M4/9083Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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