High-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as preparation method and application thereof

A nano-composite material and composite material technology are applied in the field of nickel-iron-based oxygen evolution electrocatalytic materials and their synthesis, which can solve the problems of hindering the exposure of electron transport active sites, lack of oxygen evolution performance, uneven morphology, etc. Electron transfer, high electrochemical stability, effect of accelerating electron transport rate

Active Publication Date: 2020-08-28
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in the preparation process of iron (nickel) nanocomposites, due to the defects in the control of preparation process parameters, the traditional electrocatalytic composites have problems such as uneven morphology and easy accumulation, which hinder the transmission of electrons and the exposure of active sites. , resulting in a lack of oxygen evolution performance

Method used

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  • High-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as preparation method and application thereof
  • High-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as preparation method and application thereof
  • High-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1, nickel-based oxygen evolution electrocatalytic material (Ni 3 S 4 ) preparation

[0049] (1) Measure 30ml of deionized water in a clean beaker, add 0.2mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) Stir the mixture with magnetic force for 10 minutes, then add 1 mmol urea and stir evenly to form an alkaline environment until a transparent light green solution is obtained. Then, the solution was transferred into a 50 mL Teflon-lined autoclave and kept at 120 °C for 6 h. After naturally cooling to room temperature, the green powder was collected by centrifugation and vacuum-dried at 60°C to obtain the primary product.

[0050] (2) The initial product and 30mL containing 2mmol sodium sulfide (Na 2 S) The aqueous solutions are put together in an autoclave and kept at 90° C. for 9 hours. After the obtained black powder was cooled to room temperature, it was washed successively with deionized water and ethanol, and vacuum-dried at 60 °C for 12 h to ...

Embodiment 2

[0052] Embodiment 2, nickel-iron-based oxygen evolution electrocatalytic material (Ni 3 S 4 / FeS 2 ) preparation

[0053] (1) Measure 30ml of deionized water in a clean beaker, add 0.18mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) and 0.02mmol iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Stir the mixture with magnetic force for 10 minutes, then add 1 mmol urea and stir evenly to form an alkaline environment until a transparent light green solution is obtained. Then, the solution was transferred into a 50 mL Teflon-lined autoclave and kept at 120 °C for 6 h. After naturally cooling to room temperature, the green powder was collected by centrifugation and vacuum-dried at 60°C to obtain the primary product.

[0054] (2) The initial product and 30mL containing 2mmol sodium sulfur (Na 2 S) The aqueous solutions are put together in an autoclave and kept at 90° C. for 9 hours. After the obtained black powder was cooled to room temperature, it was washed successive...

Embodiment 3

[0055] Embodiment 3, nickel-iron-based oxygen evolution electrocatalytic material (Ni 3 S 4 / FeS 2 ) preparation

[0056] (1) Measure 30ml of deionized water in a clean beaker, add 0.167mmol nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) and 0.033mmol iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Stir the mixture with magnetic force for 10 minutes, then add 0.8mmol urea and stir evenly to form an alkaline environment until a transparent light green solution is obtained. Then, the solution was transferred into a 50 mL Teflon-lined autoclave and kept at 120 °C for 6 h. After naturally cooling to room temperature, the green powder was collected by centrifugation and vacuum-dried at 60°C to obtain the primary product.

[0057] (2) The initial product and 30mL containing 1.6mmol sodium sulfur (Na 2 S) The aqueous solutions are put together in an autoclave and kept at 90° C. for 9 hours. After the obtained black powder was cooled to room temperature, it was washed succe...

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Abstract

The invention relates to a high-performance ferronickel-based oxygen evolution electrocatalytic nano composite material as well as a preparation method and application thereof. The composite materialis composed of uniform nanosheets formed by mutually crosslinking nickel tetrasulfide and iron disulfide. The composite material contains high-valence metal ions Ni3+, so that the active sites of OERare increased, the coordination effect between ferronickel is enhanced, and the electro-catalytic performance is further improved. The composite material has the advantages of simple preparation process, high efficiency, mild synthesis conditions, environmental friendliness and the like, has higher catalytic activity and good electrochemical stability, is suitable for the field of electrochemistry, and has higher potential practical value.

Description

technical field [0001] The invention relates to the fields of new material technology and electrocatalysis, and belongs to the fields of polymer chemistry and nanometer materials. Specifically, it relates to a nickel-iron-based oxygen evolution electrocatalyst material and a synthesis method thereof, and its synthesized nickel-iron-based oxygen evolution electrocatalyst (Ni 3 S 4 / FeS 2 ) have good electrochemical properties. Background technique [0002] In today's society, the environmental pollution caused by dependence on fossil energy, the greenhouse effect and the energy crisis have aroused widespread concern around the world. Therefore, the development of greener new energy technologies has become one of the problems that human beings need to solve urgently. Due to its advantages of high energy, low density, various forms, convenient transportation, renewable and non-polluting, hydrogen energy is considered to be an ideal alternative energy source for human beings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C25B11/06C25B1/04
CPCB01J27/043B01J35/0033C25B11/04C25B1/04Y02E60/36
Inventor 周炎郭千瑜张军王雪媛王淑涛脱永笑贾翠萍
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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