A three-dimensional nickel-doped iron-based oxygen evolution catalyst and its preparation method and application

A catalyst and three-dimensional technology, applied in the field of oxygen evolution catalysts, can solve the problems of low catalytic activity, high cost, complicated preparation, etc., and achieve the effects of excellent catalytic activity, improved catalytic activity and good stability

Active Publication Date: 2020-03-03
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the shortcomings of the above-mentioned oxygen evolution catalysts for electrolyzed water that are generally expensive, complicated to prepare, and have low catalytic activity in the prior art, the purpose of the present invention is to provide a three-dimensional nickel-doped iron-based oxygen evolution catalyst, which is different from other existing Compared with non-precious metal materials, it has extremely high catalytic activity, and its stability is better than other similar catalyst materials

Method used

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  • A three-dimensional nickel-doped iron-based oxygen evolution catalyst and its preparation method and application
  • A three-dimensional nickel-doped iron-based oxygen evolution catalyst and its preparation method and application
  • A three-dimensional nickel-doped iron-based oxygen evolution catalyst and its preparation method and application

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Effect test

Embodiment 1

[0044] 6cm -2 The foam iron was pretreated by ultrasonic cleaning in ethanol, acetone and deionized water for 30 minutes; 15mL of 0.3mol / L sodium sulfide was added to a 25mL polytetrafluoroethylene reactor, and then pretreated The foam iron was subjected to a hydrothermal reaction at a temperature of 120°C for 12 hours. After the reaction, it was cooled to room temperature and rinsed several times with deionized deionized water until the washing liquid became clear, and then vacuum-dried at 60°C. After drying overnight, the conductive ultrathin ferrous sulfide nanosheets grown in situ on the foamed iron were obtained as a three-dimensional conductive framework. At room temperature, soak the three-dimensional conductive framework in 25mL of 15mmol / L nickel chloride solution for 5 minutes, take it out and rinse it with deionized water several times until the washing solution becomes clear, then at 60°C, vacuum Dry overnight to obtain a three-dimensional nickel-doped iron-based ...

Embodiment 2

[0052] Other preparation processes are all the same as in Example 1, except that the sodium sulfide in Example 1 is replaced with thiourea, and the ferrous sulfide nanosheets obtained in situ on the foamed iron become smaller, and oxygen, iron, sulfur and The atomic percentages of nickel are 67.41%, 19.04%, 4.12% and 9.43%, respectively.

Embodiment 3

[0054] Other preparation processes are all the same as in Example 1, and the difference is that the sodium sulfide in Example 1 is replaced with thioacetamide, and the ferrous sulfide nanosheets obtained in situ on foam iron become smaller, and oxygen, iron, The atomic percentages of sulfur and nickel are 65.32%, 21.37%, 4.81% and 8.50%, respectively.

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Abstract

The invention discloses a three-dimensional nickel-doped iron-based oxygen evolution catalyst and preparation and application methods thereof. The three-dimensional nickel-doped iron-based oxygen evolution catalyst is prepared through simple hydrothermal reaction and ion exchange reaction. The prepared three-dimensional nickel-doped iron-based oxygen evolution catalyst is high in electrical conductivity, large in surface area, high in activity and dominant in iron. Mainly composed of iron element, the three-dimensional nickel-doped iron-based oxygen evolution catalyst is low in cost; the preparation method of the three-dimensional nickel-doped iron-based oxygen evolution catalyst is simple in process, convenient to operate, economical and applicable to large-scale industrialized production. The three-dimensional nickel-doped iron-based oxygen evolution catalyst can be applied as the anode catalyst of water electrolysis hydrogen production technology, have a potential replace noble metal catalysts, thereby having huge potential application value.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to an oxygen evolution catalyst for electrolyzing water, a preparation method and application thereof. Background technique [0002] As we all know, the energy crisis and environmental pollution are problems that countries all over the world need to solve urgently. The best way to solve this problem is to develop safe, clean, efficient and sustainable new energy. Wind energy, tidal energy, solar energy, hydrogen energy, etc. are new types of renewable energy, among which hydrogen energy is recognized as a zero-emission clean energy source, and its source is abundant water. A new energy technology combining hydrogen-oxygen fuel cells and water electrolysis, that is, through 2H 2 +O 2 →2H 2 O+ energy (hydrogen fuel cell), and 2H 2 O+energy→2H 2 +O 2 (Electrolysis of water) process can be recycled. Among them, the electrolytic water technology is based on the principle of el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04
CPCC25B1/04C25B11/031C25B11/051C25B11/057C25B11/091Y02E60/36
Inventor 胡劲松牛帅江文杰
Owner INST OF CHEM CHINESE ACAD OF SCI
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