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Preparation method of foamed nickel-loaded amorphous phosphorus-doped nickel molybdate bifunctional electrocatalytic electrode and application thereof

A foamed nickel, amorphous technology, applied in catalyst activation/preparation, chemical instruments and methods, electrodes, etc., can solve the problems of high energy consumption, unfavorable large-scale industrialization, cumbersome preparation process, etc., and achieves simple preparation process and convenient industrialization. The effect of simple application and preparation process

Active Publication Date: 2020-09-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the above-mentioned preparation process is cumbersome and energy-consuming, which is not conducive to large-scale industrialization.

Method used

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  • Preparation method of foamed nickel-loaded amorphous phosphorus-doped nickel molybdate bifunctional electrocatalytic electrode and application thereof
  • Preparation method of foamed nickel-loaded amorphous phosphorus-doped nickel molybdate bifunctional electrocatalytic electrode and application thereof
  • Preparation method of foamed nickel-loaded amorphous phosphorus-doped nickel molybdate bifunctional electrocatalytic electrode and application thereof

Examples

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preparation example Construction

[0052] Such as Figure 1 to Figure 15 As shown, the preparation method of a foam nickel-loaded amorphous phosphorus-doped nickel molybdate bifunctional electrocatalytic electrode involved in this embodiment, the specific steps of the preparation method are as follows:

[0053] Step 1. Soak the nickel foam in 0.5-5mol / L hydrochloric acid aqueous solution at room temperature to remove the metal oxides on the surface. The soaking time is 10-60 minutes. Take out the nickel foam and rinse it with deionized water;

[0054] Step 2. Immerse the pickled nickel foam into 10-100mg / mL phosphomolybdic acid aqueous solution, the reaction temperature is room temperature, and the soaking time is between 12-48 hours. Take out the foam nickel and rinse it with deionized water, dry it for later use. Amorphous phosphorus-doped nickel molybdate nanostructures supported by nickel foam were prepared.

[0055] Application of an amorphous phosphorus-doped nickel molybdate nanostructure bifunctional e...

Embodiment 1

[0059] The concentration of phosphomolybdic acid in this example is 20mg / mL, and concrete preparation steps are as follows:

[0060] First, immerse a nickel foam with a size of 2cm×5cm in 3mol / L HCl for 10min to remove the oxides on the surface. After finishing, rinse the nickel foam with deionized water. At room temperature, soak the above-mentioned nickel foam from which surface metal oxides have been removed in 10 milliliters of phosphomolybdic acid aqueous solution, the concentration of phosphomolybdic acid is 20 mg / mL, and the soaking time is 24 hours. After the reaction, rinse it with deionized water and dry it for later use.

[0061] In the embodiment, the schematic diagram of redox reaction is as figure 1 shown.

[0062] In the embodiment, the surface morphology of the metal oxide on the surface of nickel foam is removed and analyzed by FEI Quanta 200 scanning electron microscope, such as figure 2 , showing a smooth surface.

[0063] In the embodiment, the surfac...

Embodiment 2

[0069] The concentration of phosphomolybdic acid in this example is 10mg / mL, and concrete preparation steps are as follows:

[0070] First, immerse a nickel foam with a size of 2cm×5cm in 3mol / L HCl for 10min to remove the oxides on the surface. After finishing, rinse the nickel foam with deionized water. At room temperature, soak the above-mentioned nickel foam from which the surface metal oxide has been removed in 10 ml of phosphomolybdic acid aqueous solution, the concentration of phosphomolybdic acid is 10 mg / mL, and the soaking time is 24 hours. After the reaction, rinse it with deionized water and dry it for later use.

[0071] In the embodiment, the surface morphology of the metal oxide on the surface of nickel foam is removed and analyzed by FEI Quanta 200 scanning electron microscope, such as Figure 9 As shown, a grid-like nanostructure is displayed.

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Abstract

The invention provides a preparation method of a foamed nickel-loaded amorphous phosphorus doped nickel molybdate bifunctional electrocatalytic electrode and an application thereof, and belongs to thetechnical field of hydrogen energy and fuel cells. The preparation method comprises the following steps: soaking foamed nickel into an HCl solution, removing metal oxide on the surface, soaking the pickled foamed nickel into a phosphomolybdic acid aqueous solution, carrying out a spontaneous oxidation-reduction reaction, taking out, washing with deionized water, and drying for later use, therebyobtaining the foamed nickel-loaded amorphous phosphorus-doped nickel molybdate nanostructure. The foamed nickel is etched by using the phosphomolybdic acid aqueous solution, and can be directly used after drying, the material can be used as a bifunctional electrode material for urea electrooxidation and water and electricity reduction; a urea electrooxidation reaction with low oxidation potentialis used for replacing an electrocatalytic oxygen evolution reaction, a two-electrode urea auxiliary electrolysis hydrogen production system based on a bifunctional electrocatalyst is constructed in analkaline solution, low-cost, low-energy-consumption and stable electrochemical hydrogen production is achieved, and the method is suitable for large-scale industrial electrochemical hydrogen production application.

Description

technical field [0001] The invention relates to a preparation method and application of a foam nickel-loaded amorphous phosphorus-doped nickel molybdate bifunctional electrocatalytic electrode, which belongs to the technical field of hydrogen energy and fuel cells. Background technique [0002] The depletion of fossil energy and the deteriorating environment urgently require people to develop renewable and clean energy. Hydrogen energy is a clean secondary energy source and an important technical research direction for improving the environment. Hydrogen production by electrolysis of water is currently one of the most promising hydrogen production technologies (Science 2017, 355, eaad4998). The water electrolysis process includes two processes, the electrochemical hydrogen evolution reaction (HER) and the electrochemical oxygen evolution reaction (OER). The limited reaction kinetics often requires a high overpotential to generate hydrogen, resulting in serious power loss (Ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B11/06B01J27/19B01J37/02C25B1/04C25B3/02C25B11/03C25B3/23
CPCC25B11/03C25B1/04B01J27/19B01J37/0201B01J35/33B01J35/40Y02E60/36
Inventor 邱云峰马卓应余欣朱忆雪蒋轶男纪心阳
Owner HARBIN INST OF TECH
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