Nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation and application thereof

An oxygen evolution electrode, nickel molten iron technology, applied in the direction of electrode, electrode shape/type, electrolysis process, etc., can solve the problems of affecting the catalytic activity and life of the electrode, hindered charge transfer, complicated process, etc., to ensure charge transfer efficiency, improve Structural stability, simple and fast operation

Inactive Publication Date: 2018-06-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis methods of such materials reported at this stage and the methods of electrode preparation have limitations, such as the use of solvothermal method, high temperature tempering method and other synthesis methods, complex process, high energy consumption, and unfriendly environment; in addition, usually Loading the prepared electrocatalyst...

Method used

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  • Nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation and application thereof
  • Nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation and application thereof
  • Nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation and application thereof

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Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of a nickel-iron hydrotalcite-based electrocatalytic oxygen evolution electrode is carried out according to the following steps.

[0026] (1) Nickel foam was ultrasonically cleaned in acetone for 10 minutes, cleaned in ultrapure water for 10 minutes, and repeated twice, ultrasonically in 1mol / L hydrochloric acid for 10 minutes, and finally cleaned in ultrapure water for 10 minutes, And repeat twice.

[0027] (2) Electrolyte preparation: directly dissolve nickel nitrate and ferrous sulfate in ultrapure water. The sum of the molar concentrations of nickel and iron elements is 50mmol / L, and the molar content of iron elements is 25%.

[0028] (3) With the nickel foam electrode processed in step (1) as the working electrode and the counter electrode, the saturated calomel electrode as the reference electrode, and the solution prepared in the step (2) as the electrolyte, assembled into a standard three-electrode system.

[0029] (4) Connect the three-e...

Embodiment 2

[0038] A preparation method of a nickel-iron hydrotalcite-based electrocatalytic oxygen evolution electrode is carried out according to the following steps.

[0039] (5) Nickel foam was ultrasonically cleaned in acetone for 10 minutes, cleaned in ultrapure water for 10 minutes, and repeated twice, ultrasonically in 1mol / L hydrochloric acid for 10 minutes, and finally cleaned in ultrapure water for 10 minutes, And repeat twice.

[0040] (6) Electrolyte preparation: directly dissolve nickel nitrate and ferrous sulfate in ultrapure water. The sum of the molar concentrations of nickel and iron elements is 50mmol / L, and the molar content of iron elements is 25%.

[0041] (7) With the nickel foam electrode processed in step (1) as the working electrode and the counter electrode, the saturated calomel electrode as the reference electrode, the solution prepared in the step (2) as the electrolyte, assembled into a standard three-electrode system.

[0042] (8) Connect the three-elect...

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Abstract

The invention belongs to the technical fields of material sciences and electro-catalytic hydrogen production, and particularly relates to a nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode and preparation thereof, wherein the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode can be used in an electrolytic water oxygen evolution reaction in an alkaline medium. An electrode system takes a nickel-iron hydrotalcite structure as a catalytic activity center and takes nickel foam as an electrode material; in the alkaline medium, the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode can efficiently electrolyze water to prepare oxygen, the overall overcurrent polishing of electrolytic water is reduced greatly, and good stability is showed; according to the preparation technology of the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode, a nickel-iron hydrotalcite composite structure is grownon the nickel foam base through an in-situ electrodeposition method; and the resources of required raw materials are wide, the price is low, the technology is mature and stable, operation is easy, convenient and fast, controllability is high, the process does not produce poison, and the nickel-iron hydrotalcite based electro-catalytic oxygen evolution electrode is suitable for mass production andthe industrial electrolytic water reaction.

Description

technical field [0001] The invention belongs to the technical field of material science and the technical field of electrocatalytic hydrogen production, and specifically relates to a nickel-iron hydrotalcite-based electrocatalytic oxygen evolution electrode capable of efficiently electrolyzing water to produce hydrogen in an alkaline medium and its preparation. Background technique [0002] Hydrogen is an important clean energy, and it is considered as a promising new energy to replace fossil energy, and has been widely concerned all over the world. In recent years, with the continuous development of new power generation technologies and the continuous optimization and upgrading of power grid systems, the advantages of electrolytic water hydrogen production technology have been further amplified, and it has even been widely praised as "the most ideal industrial hydrogen production method". However, in the process of electrocatalytic water splitting, the kinetic hindrance of ...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/03C25B1/04C25D9/04
CPCC25B1/04C25D9/04C25B11/031C25B11/051C25B11/075Y02E60/36
Inventor 黄延强王发楠何杨华徐金铭张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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