Foamed nickel-molybdenum alloy doped with carbon quantum dots and preparation method

A technology of carbon quantum dots and foamed nickel, which is applied in the field of preparation of foamed nickel-molybdenum alloys, can solve problems such as limiting the application of nickel-molybdenum alloys and hydrogen evolution effects, and achieve the effects of strong stability, good coating quality, and high molybdenum content

Inactive Publication Date: 2021-05-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the content of molybdenum in nickel-molybdenum alloy is the key to determine the hydrogen evolution performance of the alloy, but it is difficult to achieve high concentration deposition by conventional methods, which limits the application and hydrogen evolution effect of nickel-molybdenum alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the preparation method of foamed nickel-molybdenum alloy doped with carbon quantum dots is to electrodeposit nickel-molybdenum alloy and doped with carbon quantum dots on the foamed nickel substrate. The electrodeposition solution formula used in this method includes nickel sulfate, molybdenum acid Ammonium, trisodium citrate, sodium chloride, ammonia water with a mass fraction of 25%, 1,4-butynediol, saccharin, glucose carbon quantum dots. The method includes the following steps:

[0026] (1) prepare an electroplating solution of an electrodeposited foamed nickel-molybdenum alloy according to a known formula, the main components of the electroplating solution are deionized water, nickel sulfate, ammonium molybdate, trisodium citrate, sodium chloride, 25% ammoniacal liquor ( mass fraction), 1,4-butynediol and saccharin;

[0027] (2) Glucose carbon quantum dot solution is prepared by glucose hydrothermal method;

[0028] (3) The glucose carbon quant...

Embodiment 2

[0037] Different from Example 1, the solution temperature in step (5) of the method is 35°C, and the apparent cathode current density is 110mA / cm 2 .

[0038] The quality of the electrodeposition layer obtained by the above method is good, the electrodeposition solution system is stable, the operation is convenient, the air pollution is small, and the cathode current density measured according to the polarization curve is 200A / m 2 When the standard potential can reach -0.1V, it can meet the needs of industrial production.

Embodiment 3

[0040] Different from Example 1, the solution temperature in step (5) of the method is 55°C, and the apparent cathode current density is 130mA / cm 2 .

[0041] The quality of the electrodeposition layer obtained by the above method is good, the electrodeposition solution system is stable, the operation is convenient, the air pollution is small, and the cathode current density measured according to the polarization curve is 200A / m 2 When the standard potential can reach -0.1V, it can meet the needs of industrial production.

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Abstract

The invention discloses a carbon quantum dot-doped foamed nickel-molybdenum alloy and a preparation method thereof. The method comprises the following steps: (1) preparing a part of electroplate liquid for electrodeposition of the foamed nickel-molybdenum alloy according to a known formula; (2) preparing a glucose carbon quantum dot solution by adopting a glucose hydrothermal method; (3) freezing and drying glucose carbon quantum dots into a carbon quantum dot solid, grinding the carbon quantum dot solid into carbon quantum dot powder, and adding the carbon quantum dot powder into the solution obtained in the step (1) to obtain an electro-deposition solution; (4) using nickel and molybdenum as anodes, foamed nickel as a cathode, placing the anodes and the cathodes in the electro-deposition solution, and performing electro-deposition in a single-cathode and double-anode mode; and (5) heating the solution to 35-55 DEG C, and carrying out electro-deposition under the condition that the apparent cathode current density is 110-130 mA/cm<2>. The foamed nickel-molybdenum alloy doped with the carbon quantum dots prepared by the method has the beneficial effects of good plating quality, good hydrogen evolution effect, high stability and high molybdenum content.

Description

technical field [0001] The invention relates to the technical field of hydrogen evolution material preparation, in particular to a method for preparing a foamed nickel-molybdenum alloy doped with carbon quantum dots. Background technique [0002] The continuous consumption of fossil energy has led to a gradual decline in reserves, which will eventually lead to its depletion, which prompts people to look for other types of new energy. Hydrogen is an ideal new energy that can replace some fossil fuels. Water electrolysis to generate hydrogen is one of the important methods to obtain hydrogen energy, but it requires high-performance electrocatalysts. Platinum and platinum-based metals have high electrocatalytic activity, but their application is limited by high cost. Therefore, there is an urgent need to develop durable, inexpensive catalytic materials with high hydrogen evolution reactivity. Recently, many efforts have been made to develop alloys of transition metals (eg, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/091C25B1/04C25D3/56C25D15/00
CPCC25B1/04C25D3/56C25D15/00Y02E60/36
Inventor 朱日龙李国希柳栋宝童春义王朝阳潘亮
Owner HUNAN UNIV
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