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Soybean biological base fuel cell oxygen reduction catalyst and preparation method and application thereof

A fuel cell, bio-based technology, applied in fuel cells, battery electrodes, circuits, etc., can solve problems such as hindering the development of fuel cells and high cost of Pt, and achieve the effects of saving raw materials, improving yield, and good activity

Inactive Publication Date: 2018-08-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Pt and its alloys are still the most effective ORR catalysts, but further development of fuel cell technologies based on these materials is hampered by the scarcity of Pt and the consequent high cost [Steele B C H, Heinzel A. Materials for fuel-cell technologies[M] / / Materials For Sustainable Energy:ACollection of Peer-Reviewed Research and Review Articles from Nature Publishing Group.2011:224-231.]

Method used

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  • Soybean biological base fuel cell oxygen reduction catalyst and preparation method and application thereof
  • Soybean biological base fuel cell oxygen reduction catalyst and preparation method and application thereof
  • Soybean biological base fuel cell oxygen reduction catalyst and preparation method and application thereof

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preparation example Construction

[0039] The preparation of graphene oxide of the present invention is improved on the basis of the Hummers method; what the raw material of existing Hummers method prepares graphene oxide adopts four kinds of graphite powder, potassium nitrate, potassium permanganate and concentrated sulfuric acid, and the reaction time is as long as 24h, the graphene loss after preparation is serious, for example preparation 3g graphene can only obtain 2g graphene oxide product; And the raw material that the improved Hummers method of the present invention adopts is graphite powder, potassium permanganate and the vitriol oil, has saved Potassium nitrate is oxidized by the strong oxidizing ability of potassium permanganate and concentrated sulfuric acid. Through the ratio developed and designed by the laboratory, the reaction only takes 12 hours, which saves raw materials and shortens the reaction time. The preparation of 3g graphene can 2.5-2.6 g of graphene oxide is obtained, and the yield is ...

Embodiment 1

[0050] Graphene is to utilize natural graphite powder to adopt improved Hummers method to prepare, and the steps are as follows: Weigh 3g graphite powder, 114g concentrated sulfuric acid and slowly add in dry 500mL beaker, under stirring, slowly add 15g potassium permanganate, then react for 12h ; Slowly pour the viscous dark green reactant into 200mL of pure water, and add 15mL of 30% hydrogen peroxide solution dropwise. At this time, the color of the solution turns bright yellow and bubbles come out, and then use deionized water successively. 3% dilute sulfuric acid and ethanol were centrifuged and washed three times each; the precipitate was collected and purified water was added to 500mL to prepare a 3g / 500mL graphene oxide dispersion for later use.

[0051] The preparation of soybean bio-based fuel cell oxygen reduction catalyst, that is, nitrogen-doped carbon biomass-derived carbon-based catalyst, the steps are as follows: soybeans are ground in a soymilk machine to form ...

Embodiment 2

[0058] Graphene is to utilize natural graphite powder to adopt improved Hummers method to prepare, and the steps are as follows: Weigh 3g graphite powder, 114g concentrated sulfuric acid and slowly add in dry 500mL beaker, under stirring, slowly add 15g potassium permanganate, then react for 12h ; Slowly pour the viscous dark green reactant into 200mL of pure water, and add 15mL of 30% hydrogen peroxide solution dropwise. At this time, the color of the solution turns bright yellow and bubbles come out, and then use deionized water successively. 3% dilute sulfuric acid and ethanol were centrifuged and washed three times each; the precipitate was collected and purified water was added to 500mL to prepare a 3g / 500mL graphene oxide dispersion for later use.

[0059] The preparation of oxygen reduction catalyst for soybean bio-based fuel cell, that is, nitrogen-doped carbon biomass-derived carbon-based catalyst, the steps are as follows: 70g of soybean is ground in a soymilk machine...

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Abstract

The invention discloses a soybean biological base fuel cell oxygen reduction catalyst and a preparation thereof. The preparation method comprises the following steps of 1) preparing graphene oxide; 2)taking graphene oxide as a carrier and taking soybean as a carbon source, performing carbonization treatment through a hydrothermal method to obtain a precursor; and 3) performing pyrolysis and reduction on the precursor in an ammonia gas atmosphere to obtain the soybean biological base fuel cell oxygen reduction catalyst. The soybean biological base fuel cell oxygen reduction catalyst is used for catalyzing an oxygen reduction reaction of a fuel cell. The soybean biological base fuel cell oxygen reduction catalyst is prepared through a simple method by taking low-cost natural biomass soybeanas the raw material and by taking graphene as the carrier for performing pyrolysis and reduction in the ammonia gas atmosphere at a temperature of 800 DEG C. The catalyst is excellent in oxygen reduction performance and can be widely applied to the fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cell oxygen reduction catalysts, in particular to a soybean bio-based fuel cell oxygen reduction catalyst and its preparation method and application. Background technique [0002] The current use of coal-based fossil fuels will cause corresponding pollution after combustion due to the degree of combustion and the quality of coal mines. As the degree of pollution deepens, it will lead to global warming. The global climate problem is one of the most complex challenges faced by human beings in the 21st century. Therefore, the search for green energy has become the theme of the current development of human society. Way. At present, the fuel cell, characterized by large capacity, high energy utilization efficiency and less environmental pollution, is a potential form of energy utilization. It can use the stored fuel to realize the conversion of chemical energy into electrical energy[Liu Z, Wimberly M C ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083H01M2008/1095Y02E60/50
Inventor 孙玥黄太仲
Owner UNIV OF JINAN
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