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Porous Ni-S/TiO2 composite hydrogen evolution electrode and preparation method thereof

A hydrogen evolution electrode and composite electrodeposition technology, which is applied in the field of electrocatalytic hydrogen production and material science, can solve the problems of high cost, poor stability, and low catalytic activity of hydrogen evolution electrodes, and achieve improved mechanical stability, good stability, and hydrogen evolution catalysis good performance

Inactive Publication Date: 2018-05-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low cost, high catalytic activity and high stability porous Ni-S / TiO 2 Composite hydrogen evolution electrode and its preparation method solve the shortcomings of existing hydrogen evolution electrodes such as high cost, low catalytic activity and poor stability

Method used

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  • Porous Ni-S/TiO2 composite hydrogen evolution electrode and preparation method thereof
  • Porous Ni-S/TiO2 composite hydrogen evolution electrode and preparation method thereof

Examples

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Embodiment 1

[0025] In this embodiment, the composite electrodeposition method is mainly used to deposit the nickel-sulfur coating on the surface of the three-dimensional nickel foam. At the same time, in the electroplating process, the nano-sized TiO in the composite plating solution is mixed by magnetic stirring 2 Doped into the nickel-sulfur coating, the specific steps are as follows:

[0026] (1) Selection and pretreatment of nickel foam

[0027] The purity of the three-dimensional porous nickel foam is 99.9wt%, and the surface density is 480g / m 2 . At room temperature, degrease and degrease the nickel foam in acetone for 10 minutes, and clean it with ultrapure water; then, put it into 3M (molar concentration) hydrochloric acid for acidification and activation treatment for 5 minutes; finally, put it into ultrapure water for ultrasonic cleaning for 5 minutes and bake Dry and set aside.

[0028] (2) Preparation of Ni-S / TiO 2 Compound electrode

[0029] The nickel foam pretreated i...

Embodiment 2

[0035] In this embodiment, the composite electrodeposition method is mainly used to deposit the nickel-sulfur coating on the surface of the three-dimensional nickel foam. At the same time, in the electroplating process, the nano-sized TiO in the composite plating solution is mixed by magnetic stirring 2 Doped into the nickel-sulfur coating, the specific steps are as follows:

[0036] (1) Selection and pretreatment of nickel foam

[0037] The purity of the three-dimensional porous nickel foam is 99.9%, and the surface density is 550g / m 2 . At room temperature, the nickel foam was degreased and degreased in acetone for 5 minutes, and cleaned with ultrapure water; then, it was acidified and activated in 3M hydrochloric acid for 5 minutes; finally, it was ultrasonically cleaned in ultrapure water for 5 minutes and dried for use.

[0038] (2) Preparation of Ni-S / TiO 2 Compound electrode

[0039] The nickel foam pretreated in the step (1) is put into the composite plating solut...

Embodiment 3

[0043] In this embodiment, the composite electrodeposition method is mainly used to deposit the nickel-sulfur coating on the surface of the three-dimensional nickel foam. At the same time, in the electroplating process, the nano-sized TiO in the composite plating solution is mixed by magnetic stirring 2 Doped into the nickel-sulfur coating, the specific steps are as follows:

[0044] (1) Selection and pretreatment of nickel foam

[0045] The purity of the three-dimensional porous nickel foam is 99.9%, and the surface density is 500g / m 2 . At room temperature, the nickel foam was degreased and degreased in acetone for 15 minutes, and cleaned with ultrapure water; then, it was acidified and activated in 3M hydrochloric acid for 5 minutes; finally, it was ultrasonically cleaned in ultrapure water for 5 minutes and dried for use.

[0046] (2) Preparation of Ni-S / TiO 2 Compound electrode

[0047] The nickel foam pretreated in step (1) is put into the composite plating solution...

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Abstract

The invention relates to a porous Ni-S / TiO2 composite hydrogen evolution electrode and a preparation method thereof, and belongs to the field of the material science and technology and the field of electro-catalysis hydrogen production. According to the electrode, three-dimensional foamed nickel is adopted as a carrier to provide a porous structure, a nickel-sulfur plating layer is adopted as a surface active layer, TiO2 is doped in the nickel-sulfur plating layer in a composite manner through a composite electrodeposition method, and the foamed nickel based Ni-S / TiO2 composite hydrogen evolution electrode with the porous structure is formed. The composite electrodeposition method is adopted, and nickel-sulfur plating layer deposition is carried out on the surface of the three-dimensionalfoamed nickel. Meanwhile, in the electrodeposition process, the nanoscale TiO2 in composite plating liquid is doped in the nickel-sulfur plating layer through magnetic stirring. The prepared hydrogenevolution electrode has the advantages of being low in overpotential, high in electrode stability and the like, the preparation process is simple, cost is low, and the electrode is suitable for large-scale production.

Description

technical field [0001] The invention relates to a porous Ni-S / TiO 2 The composite hydrogen evolution electrode and its preparation method belong to the field of material science and technology and the field of electrocatalytic hydrogen production. Background technique [0002] As an efficient, clean and ideal secondary energy, hydrogen energy will occupy an increasing proportion in the future energy system, and has attracted the attention of countries all over the world. Although hydrogen production from fossil fuels represented by steam methane reforming is currently the most economical hydrogen production method, it not only consumes a large amount of fossil fuels but also produces a large amount of carbon dioxide during the production process, which cannot fundamentally solve the energy crisis and environmental problems. Alkaline electrolyzed water, as the oldest and most technologically mature method of electrolyzed water, is the most potential low-cost, high-efficiency...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03C25B1/04C25D15/00C25D3/56
CPCC25B1/04C25D3/562C25D15/00C25B11/031C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 张开悦刘伟华张博刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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