Fex@Co<1-x>P-RGO composite material as well as in-situ synthesis method and application thereof

A composite material and in-situ synthesis technology, which is applied in the field of hydrogen energy, can solve problems such as poor catalytic activity and stability, low specific surface area of ​​the carrier, and dangerous preparation methods, and achieve fast speed, high reactivity, and improved hydrogen evolution performance and stability. Effect

Active Publication Date: 2020-05-08
SHANGHAI INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the present invention is exactly to provide a kind of Fe in order to overcome the defective that above-mentioned prior art exists x @Co 1-x P-RGO composite material and its in-situ synthesis method and its application in electroca

Method used

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  • Fex@Co&lt;1-x&gt;P-RGO composite material as well as in-situ synthesis method and application thereof
  • Fex@Co&lt;1-x&gt;P-RGO composite material as well as in-situ synthesis method and application thereof
  • Fex@Co&lt;1-x&gt;P-RGO composite material as well as in-situ synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a kind of Fe x @Co 1-x P-RGO composite material, its preparation method is as follows:

[0044] 1) Mix 2mmol iron acetate, 2mmol cobalt acetate and 20ml 3g / L graphene oxide solution and ultrasonically disperse for 30min to completely dissolve the solid to obtain a solution, then add 8mmol phytic acid to the solution and ultrasonically stir and disperse at 50°C for 8h , to obtain the reaction solution;

[0045]2) Move the reaction solution into a hydrothermal autoclave and heat it under high temperature at 180°C for 12 hours, centrifuge the product solution after the hydrothermal reaction, collect the precipitate, and place the precipitate in a vacuum drying oven to dry at 60°C Dry for 16 hours to obtain the precursor;

[0046] 3) Put the precursor into a resistance furnace, pass through nitrogen, and calcinate at a high temperature of 800°C for 2 hours to obtain Fe x @Co 1- x P-RGO composites.

[0047] Prepared Fe x @Co 1-x The scanning electron microscope imag...

Embodiment 2

[0049] In this embodiment, the Fe prepared in Example 1 x @Co 1-x The electrocatalytic hydrogen evolution reaction of the P-RGO composite material includes the following steps:

[0050] 1) Fe prepared in Example 1 x @Co 1-x Grind the P-RGO composite material, and grind the surface of the glassy carbon electrode with 0.05 μm alumina to remove the residual sample, and rinse the glassy carbon electrode with ethanol and water in turn, and dry it;

[0051] 2) Prepare 1.0M potassium hydroxide solution, and feed nitrogen into the potassium hydroxide solution for 30 minutes to remove the air in the electrolyte, and obtain the electrolyte;

[0052] 3) Prepare 0.5wt% Nafion solution with anhydrous methanol, weigh 1mg Fe x @Co 1-x The P-RGO composite material was dissolved in 100 μL Nafion solution and ultrasonically dispersed for two hours to obtain a hydrogen evolution solution, and then absorbed 12 μL hydrogen evolution solution and drip-coated on the glassy carbon electrode, and...

Embodiment 3

[0056] a kind of Fe x @Co 1-x P-RGO composite material, its preparation method is as follows:

[0057] 1) Mix 0.25mmol iron acetate, 1.75mmol cobalt acetate and 30ml 3g / L graphene oxide solution and ultrasonically disperse for 20min to completely dissolve the solid to obtain a solution, then add 16mmol phytic acid to the solution and ultrasonically stir at 50°C Disperse for 8 hours to obtain a reaction solution;

[0058] 2) Move the reaction solution to a hydrothermal autoclave and heat it under high temperature at 120°C for 18 hours, centrifuge the product solution after the hydrothermal reaction, collect the precipitate, and dry the precipitate in a vacuum drying oven at 60°C Dry for 12 hours to obtain the precursor;

[0059] 3) Put the precursor into a resistance furnace, pass through nitrogen, and calcinate at a high temperature of 500 ° C for 2 hours to obtain Fe x @Co 1- x P-RGO composites.

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Abstract

The invention relates to a Fex@Co<1-x>P-RGO composite material and an in-situ synthesis method and application thereof. The preparation method comprises the steps: firstly, mixing an iron source, a cobalt source and a graphene oxide solution to obtain a solution, adding phytic acid into the solution with uniform mixing to obtain a reaction solution; sequentially carrying out high-temperature hydrothermal reaction, centrifugation and drying on the reaction solution to obtain a precursor; and finally, calcining the precursor to obtain the Fex@Co<1-x>P-RGO composite material, wherein the composite material can be applied to an electrocatalytic hydrogen evolution reaction. Compared with the prior art, the phytic acid is adopted as a phosphorus source, and compared with red phosphorus, white phosphorus and other materials, the phytic acid is higher in safety; besides, the reduced graphene oxide is used as a carrier, so that the contact area between the FeP active center and water and the contact area between the CoP active center and water are increased, and the reaction activity of the electrocatalytic hydrogen evolution reaction is higher.

Description

technical field [0001] The invention belongs to the technical field of hydrogen energy and relates to a Fe x @Co 1-x P-RGO composite material and its in situ synthesis method and application. Background technique [0002] The global energy crisis and its related environmental problems have created an urgent need for clean, economical and sustainable energy. Hydrogen is known as a clean energy in the 21st century, and is regarded as an ideal energy substitute for fossil fuels due to its high energy density and environmental friendliness. Electrocatalytic water splitting for large-scale hydrogen production from abundant water sources is considered to be a facile route to this end. Currently, Pt group metals have been proven to be the most efficient electrocatalysts for the hydrogen evolution reaction (HER). However, their low earth reserves and high cost greatly limit their widespread application. Therefore, it is highly desirable to develop alternative catalysts with low...

Claims

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Application Information

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IPC IPC(8): B01J27/185B01J35/10C25B1/04C25B11/06
CPCB01J27/1853B01J35/0033B01J35/1004C25B1/04C25B11/091Y02E60/36
Inventor 蒋继波陈宇凯丛海山唐佳斌胡晓敏王露露杨圆圆马健韩生
Owner SHANGHAI INSTITUTE OF TECHNOLOGY
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