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Cathode material for electrolysis of water, preparation method of cathode material, and application of cathode material in electro-catalytic hydrogenation reduction of dyes

A cathode material, a technology for electrolyzing water, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low overpotential, single, low current use efficiency, etc.

Active Publication Date: 2021-10-22
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the electrolyzed water cathode material existing in the prior art is single, and the price of platinum group elements (platinum, ruthenium, palladium etc.) is high, and is easy to lose active; transition metal elements (iron, cobalt, nickel, molybdenum, tungsten, etc.) electrolyzed water overpotential is high, the use efficiency of electric current is not high problem, provide a kind of electrolyzed water cathode material and its preparation method and this cathode material in electrolysis Application in catalytic hydrogenation and reduction of dyes. The cathode material for electrolysis of water contains three specific catalyst elements. Using this cathode material for electrocatalytic hydrogenation and reduction of dyes, the cathodic electrolysis of water has low overpotential and high current use efficiency, which can improve the hydrogenation reduction product. Conversion rate

Method used

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  • Cathode material for electrolysis of water, preparation method of cathode material, and application of cathode material in electro-catalytic hydrogenation reduction of dyes
  • Cathode material for electrolysis of water, preparation method of cathode material, and application of cathode material in electro-catalytic hydrogenation reduction of dyes
  • Cathode material for electrolysis of water, preparation method of cathode material, and application of cathode material in electro-catalytic hydrogenation reduction of dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0200] (1) pretreatment is carried out to the base material: 320 meshes and 600 meshes of SiC sandpaper are used to polish stainless steel successively, remove the surface layer, and then use a potentiostat to remove the surface oxide layer in the sulfuric acid solution of 1mol / L;

[0201] (2) Pre-nickel plating: Cut the pretreated stainless steel into 1 × 2 cm blocks, and then plated them in 1 mol / L NiCl 2 ·6H 2 -160 mA cm in O solution 2 Electrodeposition was performed for 20 minutes to obtain stainless steel with nickel coating;

[0202] (3) Preparation of Ni-Mo-P / stainless steel cathode material: prepare a catalyst plating solution containing Ni, Mo, and P, the composition of the catalyst plating solution is shown in Table 1, and then adjust the pH of the catalyst plating solution to 9, and then Using the three-electrode method, the stainless steel with nickel coating was placed in the catalyst bath at -100 mA cm 2 Under electroplating for 5 minutes, a Ni-Mo-P / stainless...

Embodiment 2

[0204] (1) Pretreatment of the base material: soak the nickel foil in a 1mol / L hydrochloric acid solution for 20 minutes;

[0205] (2) Pre-nickel plating: Cut the pretreated nickel foil into a 1×2cm block, and then plated it in 1.5mol / L NiCl 2 ·6H 2 -160 mA cm in O solution 2 Electrodeposition was performed for 15 minutes to obtain a nickel foil with a nickel coating;

[0206] (3) Preparation of Ni-Mo-P / nickel foil cathode material: prepare a catalyst plating solution containing Ni, Mo, and P, the composition of the catalyst plating solution is shown in Table 1, and then adjust the pH of the catalyst plating solution to 10, Then the three-electrode method was used to place the nickel foil with nickel coating in the catalyst bath at -100 mA cm 2 Under electroplating for 5 minutes, a Ni-Mo-P / nickel foil cathode material was obtained.

Embodiment 3

[0208] (1) Pretreatment of the base material: soak the copper foil in a 1.5mol / L hydrochloric acid solution for 15 minutes;

[0209] (2) Pre-nickel plating: Cut the pretreated copper foil into a 1×2cm block, and then immerse it in 0.5mol / L NiSO 4 ·6H 2 -160 mA cm in O solution 2 Electrodeposition was performed for 25 minutes to obtain copper foil with nickel plating;

[0210] (3) Preparation of Ni-Mo-P / copper foil cathode material: prepare a catalyst plating solution containing Ni, Mo, and P, the composition of the catalyst plating solution is shown in Table 1, and then adjust the pH of the catalyst plating solution to 9.5, Then, the copper foil with nickel coating was placed in the catalyst bath at -100 mA cm by the three-electrode method. 2 Under electroplating for 15 minutes, a Ni-Mo-P / copper foil cathode material was obtained.

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Abstract

The invention relates to the technical field of electrochemical hydrogenation reduction, and discloses a cathode material for electrolysis of water, a preparation method of the cathode material, and application of the cathode material in electro-catalytic hydrogenation reduction of dyes. The method comprises the following steps: (1) pretreating a substrate material; (2) cutting the pretreated substrate material into blocks, and then carrying out nickel pre-plating in a nickel salt solution; and (3) preparing a catalyst plating solution containing a first metal element, a second metal element and a non-metal element, adjusting the pH value of the catalyst plating solution to 8-11 by using an alkali solution, and then placing the substrate material with the nickel plating layer in the catalyst plating solution by using a three-electrode method for electroplating to obtain the cathode material, wherein the first metal element is at least one selected from the group consisting of Ni, Co and Fe, the second metal element is Mo and / or W, and the non-metal element is at least one selected from P, S and N. The cathode material prepared by using the method is relatively high in conversion rate of electro-catalytic hydrogenation reduction of dyes.

Description

technical field [0001] The invention relates to the technical field of electrochemical hydrogenation reduction, in particular to a cathode material for electrolysis water and a preparation method thereof, and the application of the cathode material in electrocatalytic hydrogenation reduction dyes. Background technique [0002] There are three methods for electrochemical reduction of dyes: direct electrochemical reduction, indirect electrochemical reduction, and electrocatalytic hydrogenation reduction. Direct electrochemical reduction has the disadvantages of low current efficiency and slow reduction rate. Indirect electrochemical reduction requires an electron mediator (Fe 2+ / Fe 3+ ), and a large amount of organic ligands must be added. At present, there are many studies on indirect electrochemical vat dyes, but the cost of organic ligands is high, and they cannot be reused, and the dyeing color difference of dyes is difficult to control, making it difficult to achieve ...

Claims

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Application Information

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IPC IPC(8): C25B11/091C25B1/04
CPCC25B11/091C25B1/04Y02E60/36
Inventor 魏冬刘自豪吴晨曦姜会钰彭俊军王振东吕少仿杨锋刘慧宏
Owner WUHAN TEXTILE UNIV
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