Preparation method and application of Ce-Co-S-P nanocrystals

A ce-co-s-p, nanocrystalline technology, applied in the field of nanocrystalline, to achieve the effect of low reaction temperature, simple process and short time

Active Publication Date: 2021-07-16
NANJING XIAOZHUANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on triggering phosphide phase transition and regulating the performance of electrocatalysis by utilizing the rich redox properties, good electronic conductivity, and flexible coordination ability of rare earth element cerium.

Method used

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  • Preparation method and application of Ce-Co-S-P nanocrystals
  • Preparation method and application of Ce-Co-S-P nanocrystals
  • Preparation method and application of Ce-Co-S-P nanocrystals

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Experimental program
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Embodiment

[0026] At room temperature, weigh 203.5 mg (0.375 mmol) of cerium ammonium nitrate and 178.2 mg (0.7 mmol) of cobalt acetylacetonate, and add all the raw materials into a dry three-necked round-bottomed flask with a capacity of 250 mL, and then use a rubber-tip dropper Measure 1.5mL of oleic acid, 8mL of n-dodecanethiol and 5mL of tri-n-octylphosphine into a three-necked round-bottomed flask, and mix well to obtain a solution.

[0027] Transfer the three-neck round-bottom flask to a sand bath, raise the temperature at a rate of 7°C / min to 320°C under programmed temperature control and keep it warm for 30 minutes. Disperse with n-heptane and ethanol, and centrifuge to separate the solid. The product obtained after washing the solid was Ce-Co-S-P nanocrystal, which was vacuum-dried at 60° C. for analysis and characterization.

[0028] Using XRD, XPS, Mapping, TEM and HRTEM, EPR test to analyze the product respectively, the results are as follows Figure 1 to Figure 4 shown. f...

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Abstract

The invention provides a preparation method of Ce-Co-S-P nanocrystals. The method comprises the following steps: mixing ceric ammonium nitrate, cobalt acetylacetonate, oleic acid, n-dodecanethiol and tri-n-octylphosphine, heating to 320 DEG C, carrying out heat preservation reaction, and carrying out dispersion sedimentation and centrifugal separation on the obtained product to obtain the Ce-Co-S-P nanocrystals. The Ce-Co-S-P nanocrystals prepared in the invention have excellent OER performance, and can efficiently catalyze OER in a fuel cell. A one-pot method is adopted, Ce is used for effectively adjusting the phase change of Co-S-P nanosheets, meanwhile, the catalytic performance is adjusted, the process is simple, the reaction temperature is low, the reaction time is short, the method is suitable for batch production, and the method has important guiding significance on renewable energy technology development.

Description

technical field [0001] The invention relates to the technical field of nanocrystals, in particular to a preparation method and application of Ce-Co-S-P nanocrystals. Background technique [0002] As an ideal clean energy fuel, hydrogen not only has high energy density, but also has no carbon emissions and is environmentally friendly when applied to energy conversion devices such as fuel cells. Among many hydrogen production methods, hydrogen production by electrolysis of water has attracted widespread attention due to its green and high-efficiency characteristics. Hydrogen production by electrolysis of water mainly includes two half-reactions, the cathodic hydrogen evolution reaction (HER) and the anodic oxygen evolution reaction (OER), among which OER becomes the rate-determining step because of the slowest electrochemical kinetic process. At present, Pt-group active metal-based materials are still the most efficient catalysts for catalyzing HER (Pt, Ir, Ru, etc.) / OER (Ir / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B82Y40/00B82Y30/00
CPCH01M4/9091B82Y30/00B82Y40/00Y02E60/50
Inventor 封飞艳毛启昕钱春竹杨浩曹佳段海宝刘苏莉陈昌云
Owner NANJING XIAOZHUANG UNIV
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