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Sulfur-doped NiFe(CN) 5NO electrolyze water oxygen evolution catalyst by using solvothermal preparing method and application thereof

A solvothermal method and sulfur doping technology, which is applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of rare research reports on metal-organic framework materials, and achieve excellent electrocatalytic activity, good electrochemical stability, and excellent performance Effect

Active Publication Date: 2018-11-20
BEIJING CEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used catalysts (such as metal alloys, metal oxides, metal sulfur / phosphides, etc.) are mostly inorganic materials, and there are few research reports on metal organic framework materials as oxygen evolution catalysts.

Method used

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  • Sulfur-doped NiFe(CN) 5NO electrolyze water oxygen evolution catalyst by using solvothermal preparing method and application thereof
  • Sulfur-doped NiFe(CN) 5NO electrolyze water oxygen evolution catalyst by using solvothermal preparing method and application thereof
  • Sulfur-doped NiFe(CN) 5NO electrolyze water oxygen evolution catalyst by using solvothermal preparing method and application thereof

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Experimental program
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Effect test

preparation example Construction

[0029] NiFe(CN) 5 Preparation of NO nanoparticles:

[0030] Add an equal volume of Na 2 Fe(CN) 5 NO . 2H 2 O solution was added to Ni(NO 3 ) . 6H 2 O solution, stir evenly, let it stand for 8-12h, preferably 10h, the obtained precipitate is centrifuged, and after washing, vacuum-dry at 60°C for 12h to obtain NiFe(CN) 5 NO nanoparticles, where the Na 2 Fe(CN) 5 NO . 2H 2 O and Ni(NO 3 ) . 6H 2 The mass concentration ratio of O is 1:3.

Embodiment 1

[0032] 154 mg NiFe(CN) 5 Disperse NO in 60 mL of absolute ethanol with a concentration of 2.5 g / L. After the ultrasonic dispersion is uniform, add thiourea to control the concentration of thiourea to 8.2 g / L, continue ultrasonic dispersion, stir evenly, and transfer the mixture to a volume of 100 mL Reactor, at 140 o C for 12 h. After the reaction, cool naturally, the product is centrifuged, and the resulting precipitate is washed and vacuum-dried to obtain the dark green product S-NiFe(CN) 5 NO.

[0033] Weigh 4 mg of the catalyst and ultrasonically disperse it in 1 mL of 98% ethanol, then add 10 μL of 5% Nafion solution, and ultrasonicate for 30 minutes to form a uniform slurry. 5 μL of the catalyst slurry was dropped on a glassy carbon electrode with a diameter of 3 mm, and the oxygen evolution reaction was tested after the electrode was dried.

[0034] figure 1 is S-NiFe(CN) 5 XRD pattern of NO. All diffraction peaks are consistent with cubic NiFe(CN) 5 NO . 5H 2...

Embodiment 2

[0041] 154 mg NiFe(CN) 5 Disperse NO in absolute ethanol with a concentration of 2.5 g / L. After ultrasonic dispersion is uniform, add thiourea to control the concentration of thiourea to 4.1 g / L, continue ultrasonic dispersion, stir evenly, and transfer the mixture to a reaction chamber with a capacity of 100 mL. Kettle, at 140 o C for 12 h. After the reaction, cool naturally, the product is centrifuged, and the resulting precipitate is washed and vacuum-dried to obtain the dark green product S-NiFe(CN) 5 NO.

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Abstract

The invention belongs to the technical field of preparation of functional nano materials, and relates to preparation of an electrolytic water evolution oxygen catalyst, and in particular relates to asulfur-doped NiFe(CN) 5NO electrolyze water oxygen evolution catalyst by using a solvothermal preparing method and application thereof. The method comprises the following steps that equal volume of Na2Fe(CN)5 NO. 2H2O solution is added into a Ni(NO3).6H2O solution, and uniform stirring is performed, after leaving the solution to stand, centrifugal separation, washing and vacuum drying are carriedout on the precipitates, NiFe(CN)5NO nano-particles are obtained, and then the NiFe(CN)5NO nano-particles are ultrasonically dispersed in absolute ethyl alcohol, a sulfur source is added, after ultrasonically dispersing and uniformly stirring are performed, the mixture is transferred into a reaction kettle, wherein reaction time is carried out for 8-16 hours at the temperature of 120-200 DEG C, then naturally cooling is performed, a product S-NiFe(CN)5NO is obtainedthe after the centrifugal separation, the washing and the vacuum drying are performed on the product; the morphology of the prepared product is regular, and the particle size is about 40 micron; and the S-NiFe(CN)5NO has the advantages of excellent in electrocatalytic activity and good in stability when being used as an electrolytic oxygen evolution reaction catalyst. According to the method, compared with a commercial noble metal catalyst, the prepared electrolytic water oxygen evolution reaction catalyst has better catalytic performance; and the preparation method is simple, the controllability is good, the cost is low, and the industrial implementation is easy.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional nanomaterials, and relates to the preparation of electrolytic water oxygen evolution catalysts, in particular to the preparation of sulfur-doped NiFe(CN) by solvothermal method 5 Oxygen evolution catalyst for NO electrolysis and its application. Background technique [0002] Due to climate change and shortage of petrochemical resources, the research and development of clean energy has become an important scientific topic in recent years. The development of various new and renewable energy sources has been highly valued by researchers, such as solar energy, wind energy, nuclear energy, tidal energy, and hydrogen energy. Among them, hydrogen energy has attracted much attention due to its advantages of wide sources and high energy density. At present, hydrogen production by electrolysis of water has become a favored hydrogen production method. [0003] The Oxygen Evolution Reacti...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/075Y02E60/36
Inventor 沈小平宋春森季振源
Owner BEIJING CEI TECH
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