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Bifunctional carbon-based iron phosphide nano material based on microbial synthesis as well as preparation method and application thereof

A technology for microbial synthesis and carbon-based materials, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. , to achieve the effect of low preparation cost, easy control of the reaction process, and great potential for catalytic application.

Pending Publication Date: 2020-08-18
长沙瑞庭科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Utilizing the above methods will cause the following problems: ① usually need to add organic solvent; ② high energy consumption
The conditions for the synthesis of carbon-based iron phosphide by these methods are very harsh, and the catalysts synthesized by the above methods are difficult to meet the high-efficiency catalysis of OER and HER reactions in the same solvent.

Method used

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  • Bifunctional carbon-based iron phosphide nano material based on microbial synthesis as well as preparation method and application thereof
  • Bifunctional carbon-based iron phosphide nano material based on microbial synthesis as well as preparation method and application thereof
  • Bifunctional carbon-based iron phosphide nano material based on microbial synthesis as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A bifunctional carbon-based iron phosphide nanomaterial based on microbial synthesis, including a carbon-based material obtained by carbonization of Escherichia coli BL21 and iron phosphide nanoparticles uniformly distributed on the surface of the carbon-based material. The bifunctional carbon-based iron phosphide nanomaterial is adsorbed by the living microorganism Escherichia coli BL21 to the iron ions in the ferric chloride solution, and then transmembrane transported into the cell. be made of.

[0046] Concrete preparation method comprises the following steps:

[0047] 1) Escherichia coli (Escherichia coli BL21) was inoculated and expanded into 1 L of LB medium under sterile conditions, and cultured with shaking at 20°C for 72 hours to reach the logarithmic phase, then centrifuged at 10,000 rpm for 15 minutes to obtain wet cells;

[0048] The formula of LB medium is as follows: tryptone 10g / L, yeast extract 5g / L, sodium chloride 10g / L, and NaOH is used to adjust th...

Embodiment 2

[0057] A bifunctional carbon-based iron phosphide nanomaterial based on microbial synthesis, including a carbon-based material obtained by carbonization of Shewanella oneidensis MR-1 and iron phosphide nanoparticles uniformly distributed on the surface of the carbon-based material. The bifunctional carbon-based iron phosphide nanomaterial is absorbed by the living microorganism Shewanella oneidensis MR-1 on iron ions in iron sulfate solution, and then transmembrane transported into the cell. Made by high temperature carbonization.

[0058] Concrete preparation method comprises the following steps:

[0059] 1) Under sterile conditions, inoculate and expand Shewanella oneidensis MR-1 into 1L of LB medium, shake culture at 30°C for 48 hours to reach the logarithmic phase, and centrifuge at 8000rpm for 15min to obtain wet bacteria body;

[0060] The formula of LB medium is as follows: tryptone 10g / L, yeast extract 5g / L, sodium chloride 10g / L, and NaOH is used to adjust the pH of...

Embodiment 3

[0067] A bifunctional carbon-based iron phosphide nanomaterial based on microbial synthesis, comprising a carbon-based material obtained by carbonization of Bacillus subtilis and iron phosphide nanoparticles uniformly distributed on the surface of the carbon-based material. The bifunctional carbon-based iron phosphide nanomaterial is adsorbed by the living microorganism Bacillus subtilis on iron ions in ferric nitrate solution and then transported across the membrane to the intracellular, and redox reactions occur in vivo and in vitro, and then produced by high-temperature carbonization. have to.

[0068] Concrete preparation method comprises the following steps:

[0069] The preparation method of carbon-based iron phosphide nanomaterial in the present embodiment comprises the following steps:

[0070] 1) Under sterile conditions, inoculate and expand Bacillus subtilis into 1 L of LB medium, culture at 25°C for 48 hours to logarithmic phase, and centrifuge at 10,000 rpm for 1...

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Abstract

The invention discloses a bifunctional carbon-based iron phosphide nano-material based on microbial synthesis, which comprises a carbon-based material and iron phosphide nano-particles uniformly distributed on the surface of the carbon-based material, and the bifunctional carbon-based iron phosphide nano-material is prepared by adsorbing iron ions by living microorganisms with phosphate groups onthe surface and then carbonizing. The nano material has excellent OER and HER reaction catalytic activity in the same electrolyte, and is good in catalytic performance and huge in application potential. The invention also discloses a preparation method of the nano-material, wherein with microorganism as a carrier, weak interaction force between rich groups on the surface of the microorganism and iron ions is used as a link; according to the method, the phosphorus source and other chemical reagents do not need to be added, so that the method has characteristics of simple process, low cost and environmental protection, and is a novel carbon-based iron phosphide nanometer material. The invention also discloses an application of the difunctional carbon-based iron phosphide nano material.

Description

technical field [0001] The invention belongs to the field of preparation of new materials, and in particular relates to a bifunctional carbon-based iron phosphide nanomaterial based on microbial synthesis, a preparation method thereof and its application in electrocatalytic OER and HER reactions. Background technique [0002] The depletion of fossil fuels and the development and utilization of new energy have always been a problem that plagues human development. Hydrogen production by electrolysis of water is an advanced new energy conversion technology that can produce clean and sustainable fuels. However, due to the low efficiency of water electrolysis, electrocatalysts with lower overpotentials are required to efficiently catalyze water splitting at high current densities and low cell voltages. At present, the electrocatalysts with excellent performance are precious metal catalysts such as platinum, palladium, ruthenium, rubidium, iridium, etc., but the reserves of precio...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/02B01J37/08B01J37/36C25B1/02C25B11/12C25B11/06
CPCB01J27/1853B01J37/36B01J37/084B01J37/082C25B1/02C25B11/051C25B11/057C25B11/075B01J35/50B01J35/33B01J35/40
Inventor 谢建平范炜刘新星邱冠周
Owner 长沙瑞庭科技有限公司
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