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Self-supporting oxygen reduction/oxygen evolution double-effect oxygen electrode catalyst and preparation method therefor

A dual-effect oxygen electrode, self-supporting technology, used in battery electrodes, circuits, electrical components, etc., can solve the problems of inability to large-scale application, lattice changes, poor stability, etc., and achieve excellent oxygen reduction and oxygen evolution performance, good Oxygen evolution performance, effect of good mechanical properties

Inactive Publication Date: 2017-04-26
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they are prone to redox reactions, which lead to lattice changes, swelling, and poor stability, making them unable to be used as oxygen reduction / precipitation dual-effect catalysts for large-scale application.

Method used

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  • Self-supporting oxygen reduction/oxygen evolution double-effect oxygen electrode catalyst and preparation method therefor
  • Self-supporting oxygen reduction/oxygen evolution double-effect oxygen electrode catalyst and preparation method therefor
  • Self-supporting oxygen reduction/oxygen evolution double-effect oxygen electrode catalyst and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] From the 0.3mm thick hydrophilic carbon paper, cut a small piece of carbon paper (CP) with a length of 12mm and a width of 10mm. Soak a small piece of carbon paper in aqua regia for 6 hours at room temperature, then take out the carbon paper and wash it with a large amount of distilled water.

[0036] 7.6g (100mmol) of thiourea, 0.25g of ferric chloride and 0.284g of nickel acetate tetrahydrate were dissolved in 60ml of deionized water, and stirred evenly to obtain a solution.

[0037] Put the treated carbon paper into a 100ml hydrothermal reaction kettle, pour the above solution into the reaction kettle, react in an oven at 200°C for 12h, and cool naturally after the reaction.

[0038] After cooling, take out the carbon paper, wash it several times with distilled water and ethanol, then soak it in 1mol / L sulfuric acid for 10h, and then wash it with deionized water.

[0039] Put the carbon paper in an oven and dry it at 60°C for 10 hours to obtain carbon paper (Fe-Ni-N...

Embodiment 2

[0041] From the 0.3mm thick hydrophilic carbon paper, cut a small piece of carbon paper with a length of 12mm and a width of 10mm. Soak a small piece of carbon paper in aqua regia for 6 hours at room temperature, then take out the carbon paper and wash it with a large amount of distilled water.

[0042] 7.6g (100mmol) of thiourea, 0.25g of ferric chloride and 0.194g of cobalt chloride were dissolved in 60ml of deionized water, and stirred evenly to obtain a solution.

[0043] Put the treated carbon paper into a 100ml hydrothermal reaction kettle, pour the above solution into the reaction kettle, react in an oven at 180°C for 18h, and cool naturally after the reaction.

[0044] After cooling, take out the carbon paper, wash it several times with distilled water and ethanol, then soak it in 2mol / L hydrochloric acid for 6h, and then wash it with deionized water.

[0045] Put the carbon paper in an oven and dry it at 120°C for 6 hours to obtain carbon paper co-doped with nitrogen...

Embodiment 3

[0047]From the 0.3mm thick hydrophilic carbon paper, cut a small piece of carbon paper with a length of 12mm and a width of 10mm. Soak a small piece of carbon paper in mixed acid (concentrated sulfuric acid: concentrated nitric acid = 3:1) for 1 hour at room temperature, then take out the carbon paper and wash it with a large amount of distilled water.

[0048] 7.6 g (100 mmol) of thiourea and 0.5 g of ferric chloride were dissolved in 60 ml of deionized water, and stirred evenly to obtain a solution.

[0049] Put the treated carbon paper into a 100ml hydrothermal reaction kettle, pour the above solution into the reaction kettle, react in an oven at 180°C for 18h, and cool naturally after the reaction.

[0050] After cooling, take out the carbon paper, wash it several times with distilled water and ethanol, soak it in 2mol / L sulfuric acid for 6h, and then wash it with deionized water.

[0051] Put the carbon paper in an oven and dry it at 100°C for 6 hours to obtain carbon pa...

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Abstract

The invention discloses a self-supporting oxygen reduction / oxygen evolution double-effect oxygen electrode catalyst and a preparation method therefor, and belongs to the fields of catalysis and materials. A certain amount of nitrogen source, sulfur source and transitional metal salt are dissolved in a water solution; and meanwhile, carbon paper is added to further synthesize a nitrogen, sulfur and transitional metal co-doped self-supporting oxygen reduction / oxygen evolution double-effect oxygen electrode through a hydrothermal reaction in one step. The method is simple and convenient to operate; the reaction is completed in one step; the adopted raw materials are common reagents used in laboratories, so that low manufacturing cost, short reaction period and high repeatability are realized; and the electrode represents high oxygen reduction and oxygen evolution double-effect property in electro-catalysis, is long in cycling life, and can be applied to many fields of a metal air cell, an integrated regenerative fuel cell, a zinc air flow cell and the like.

Description

technical field [0001] The invention belongs to the field of catalysis and materials, and specifically relates to a self-supporting oxygen reduction / precipitation double-effect oxygen electrode catalyst and a preparation method thereof. The electrode catalyst can be widely used in metal-air batteries, integrated renewable fuel cells, and zinc-air liquid flow batteries and many other fields. Background technique [0002] Energy is the basis and driving force for human progress. Currently, 78% of energy comes from fossil fuels such as coal, oil and natural gas. But these fossil energy reserves are limited and non-renewable. It is urgent to develop renewable energy and increase its proportion in energy consumption. However, energy sources such as solar energy, tidal energy, and wind energy are unstable and uncontrollable, which makes wind and light curtailment serious. Energy storage equipment is a key technology to solve the problem of unstable and uncontrollable renewable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 向中华李东明程元徽
Owner BEIJING UNIV OF CHEM TECH
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