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Derivative electrocatalyst for growing Prussian blue or Prussian blue analogues in situ on metal substrate and preparation method of derivative electrocatalyst

A Prussian blue, metal-based technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as low resistance and achieve effective, good Catalytic activity and stability, the effect of reducing resistance

Active Publication Date: 2019-11-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the construction of catalysts with simple preparation process, low electrical resistance, high catalytic activity and in situ growth remains a serious challenge.

Method used

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  • Derivative electrocatalyst for growing Prussian blue or Prussian blue analogues in situ on metal substrate and preparation method of derivative electrocatalyst
  • Derivative electrocatalyst for growing Prussian blue or Prussian blue analogues in situ on metal substrate and preparation method of derivative electrocatalyst
  • Derivative electrocatalyst for growing Prussian blue or Prussian blue analogues in situ on metal substrate and preparation method of derivative electrocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A preparation method for in-situ growth of copper-iron Prussian blue oxide derivative electrocatalyst on foamed copper, the steps are as follows:

[0050] (1) Ultrasonicate the foamed copper with acetone for 1h, dry it, dissolve 5g of potassium ferricyanide in 1L of water, and ultrasonically form a uniform potassium ferricyanide aqueous solution, immerse the foamed copper in the potassium ferricyanide aqueous solution, add hydrochloric acid 10mL , at 10°C, treated for 0.3h, after the reaction was completed, the foamed copper was washed and dried to obtain the foamed copper that grew copper-iron Prussian blue analogues;

[0051] Electron micrographs and X-ray diffraction patterns of copper foam grown with copper-iron Prussian blue analogues figure 1 , figure 2 shown by figure 2 It can be seen that its diffraction peaks coincide with the standard card of the Prussian blue analogue, proving the formation of the Prussian blue analogue.

[0052] (2) Put the copper foam ...

Embodiment 2

[0055] A kind of preparation method of electrocatalyst of in-situ growth nickel-iron Prussian blue oxide derivatives on nickel foam, the steps are as follows:

[0056] (1) Ultrasonicate the nickel foam with acetone for 5 hours, dry it in the air, dissolve 10g of potassium ferricyanide in 1L of water, and ultrasonically form a uniform potassium ferricyanide aqueous solution, immerse the foam nickel in the potassium ferricyanide aqueous solution, add 50mL of hydrochloric acid , at 10° C., treated for 1 h, after the reaction was completed, the foamed nickel was washed and dried to obtain foamed nickel that grew nickel-iron-Prussian blue analogues;

[0057] (2) Put the nickel foam grown on nickel-iron Prussian blue analogue into a tube furnace, and calcinate it at 350°C for 3h in the air atmosphere, with a heating rate of 2°C / min, to obtain in-situ growth of nickel-iron Prussian blue oxidation on the foamed nickel derivative electrocatalysts.

Embodiment 3

[0059] A method for preparing an electrocatalyst for in-situ growth of copper-iron Prussian blue phosphide derivatives on foamed copper, the steps are as follows:

[0060] (1) Ultrasonicate the copper foam with acetone for 2 hours, dry it, dissolve 15g of potassium ferricyanide in 1L of water, and form a uniform potassium ferricyanide aqueous solution by ultrasonication, immerse the foam copper in the potassium ferricyanide aqueous solution, add 10mL of hydrochloric acid , at 60 ° C, treated for 1 h, after the reaction was completed, the foamed copper was washed and dried to obtain the foamed copper that grew copper-iron Prussian blue analogues;

[0061] (2) Put the foamed copper that grows copper-iron Prussian blue analog into a tube furnace, add 200 mg of sodium hypophosphite to the magnetic boat, and calcinate at 345°C for 3h with a heating rate of 10°C / min to obtain foamed copper In situ growth of copper-iron Prussian blue phosphide derivative electrocatalysts.

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Abstract

The invention relates to a derivative electrocatalyst for growing Prussian blue or Prussian blue analogues in situ on a metal substrate and a preparation method of the derivative electrocatalyst. Themethod comprises the following steps: pre-treating the metal substrate, immersing the metal substrate into a metal cyanate aqueous solution or a metal cyanate alcoholic solution, and adding an acid into the system so as to obtain a substrate on which Prussian blue or Prussian blue analogues grow; and calcining the substrate so as to obtain the derivative electrocatalyst for growing Prussian blue or Prussian blue analogues in situ on the metal substrate. According to the method disclosed by the invention, in-situ growth of derivatives of the Prussian blue or Prussian blue analogues can be realized on multiple metal substrates, varieties of metal cyanide ions are regulated, products of different morphologies, compositions and physicochemical properties can be obtained, the prepared electrocatalyst can directly serve as an electrode, use of an adhesive is avoided, the preparation process is simplified, the resistance is reduced, and rapid electron transfer and effective mass transfer processes can be ensured, so that the catalytic activity is improved.

Description

technical field [0001] The invention relates to a derivative electrocatalyst for in-situ growth of Prussian blue or Prussian blue analogs on a metal substrate and a preparation method thereof, belonging to the fields of catalyst, electrochemical energy conversion and storage. Background technique [0002] With the rapid development of human society and the world economy, energy consumption and environmental degradation have become serious problems faced by human beings. People urgently need to develop new and renewable energy sources so as to reduce their dependence on traditional fossil energy sources. Among them, electrochemical energy conversion and storage technologies (such as fuel cells, metal-air batteries, and electrolyzed water, etc.) have attracted widespread attention due to their high energy conversion efficiency and environmental friendliness. Oxygen evolution reaction is a thermodynamic reaction involving the transfer of multiple protons and electrons, but its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/755B01J27/185B01J23/75C25B11/06C25B1/04
CPCB01J23/745B01J23/755B01J27/1853B01J23/75C25B11/04C25B1/04B01J35/33Y02E60/36
Inventor 张进涛王月青马继臻陈思
Owner SHANDONG UNIV
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