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A kind of ni-cu-c electrocatalyst and its preparation method and application

An electrocatalyst, ni-cu-c technology, applied in the field of electrocatalysis, can solve problems such as high cost and instability, and achieve the effects of convenient operation, low cost and short cycle

Active Publication Date: 2021-02-05
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its high cost and instability in electrolysis hydrogen production devices are still the main challenges for using Pt catalysts.

Method used

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  • A kind of ni-cu-c electrocatalyst and its preparation method and application
  • A kind of ni-cu-c electrocatalyst and its preparation method and application
  • A kind of ni-cu-c electrocatalyst and its preparation method and application

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preparation example Construction

[0019] The invention provides a method for preparing a Ni-Cu-C electrocatalyst, comprising the following steps: electro-depositing a nickel sheet in an electrolytic solution to obtain a Ni-Cu-C electrocatalyst; the electrolytic solution includes ammonium chloride, Nickel Metal Salts, Copper Metal Salts, Sodium Chloride, Dextrose and Water.

[0020] In the present invention, without special instructions, the raw materials used are commercially available products well known in the art. When a certain raw material can also contain crystal water, the raw material in the present invention also includes its crystal hydrate, for example, when the present invention When nickel chloride is used, the nickel chloride also includes nickel chloride hexahydrate, which will not be repeated hereafter.

[0021] The present invention has no special requirements on the size of the nickel sheet, which can be selected by those skilled in the art according to actual needs. Before the electrodeposi...

Embodiment 1

[0027] The nickel sheet is placed in acetone (purity 99.5%), ethanol solution (volume concentration 95%) and hydrochloric acid (mass concentration 20%) to carry out ultrasonic cleaning for 30 minutes, rinse with deionized water and soak in ethanol solution to obtain Pure nickel sheet electrode; the composition of the electrolyte is 0.2M ammonium chloride, 0.1M nickel chloride hexahydrate, 0.2M sodium chloride, 0.03M copper chloride, glucose 0.005M, assemble the electrolytic cell, select carbon rod for the electrode, Seal one side of the nickel sheet with insulating tape, use a DC power supply for single-sided deposition, the current density is 10mA, and the time is 600s; the prepared sample is cleaned with distilled water, and then placed in a vacuum drying oven and kept at 60°C After 5h, the Ni-Cu-C electrocatalyst was obtained, which was denoted as Ni-Cu-C1.

Embodiment 2

[0029] The nickel sheet is placed in acetone (purity 99.5%), ethanol solution (volume concentration 95%) and hydrochloric acid (mass concentration 20%) to carry out ultrasonic cleaning for 30 minutes, rinse with deionized water and soak in ethanol solution to obtain Pure nickel sheet electrode; the composition of the electrolyte is 0.2M ammonium chloride, 0.1M nickel chloride hexahydrate, 0.2M sodium chloride, 0.03M copper chloride, glucose 0.01M, assemble the electrolytic cell, and select the carbon rod for the electrode. Seal one side of the nickel sheet with insulating tape, use a DC power supply for single-sided deposition, the current density is 10mA, and the time is 600s; the prepared sample is cleaned with distilled water, and then placed in a vacuum drying oven and kept at 60°C After 5h, the Ni-Cu-C electrocatalyst was obtained, which was denoted as Ni-Cu-C2.

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Abstract

The invention provides a Ni-Cu-C electrocatalyst and its preparation method and application, belonging to the technical field of electrocatalysis. The preparation method of the Ni-Cu-C electrocatalyst of the present invention comprises the following steps: electro-depositing a nickel sheet in an electrolytic solution to obtain a Ni-Cu-C electrocatalyst; the electrolytic solution includes ammonium chloride, nickel metal salt, Copper metal salts, sodium chloride, dextrose and water. The Ni-Cu-C electrocatalyst prepared by the method of the present invention has high activity and good stability; the results of the examples show that the overpotential of the Ni-Cu-C electrocatalyst prepared by the present invention can be as low as 87mV, at 10mA / cm 2 Under the current density, the stability test was carried out for 50 hours, and the performance drop was controlled within 10%. In addition, the preparation method of the present invention has simple flow, convenient operation, mild conditions, short cycle and low cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a Ni-Cu-C electrocatalyst and its preparation method and application. Background technique [0002] With the depletion of energy and the deterioration of the environment, it is becoming more and more important to seek alternative clean energy sources, and the use of electrochemical methods to produce H on a large scale 2 Due to the advantages of low energy consumption, high purity, and environmental friendliness, it has broad application prospects. Currently, platinum (Pt) is the best electrocatalyst for electrocatalytic hydrogen evolution (HER). However, its high cost and instability in electrolytic hydrogen production devices are still the main challenges for using Pt catalysts. Therefore, the development of electrocatalysts to replace Pt is still at the forefront of technological research. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/054C25B11/091C25B1/04C25D3/56C25D9/04B01J23/755
CPCC25B1/04C25D3/56C25D9/04B01J23/755C25B11/051C25B11/091B01J35/33Y02E60/36
Inventor 张新宇牛晶晶秦家千刘日平
Owner YANSHAN UNIV