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Cobalt diselenide modified carbon fiber composite material and preparation method and application thereof

A technology of cobalt diselenide and composite materials, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of difficult synthesis, poor stability, low yield, etc., and achieve high activity and good stability. The effect of sex, synthesis method is simple

Active Publication Date: 2015-03-11
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these materials generally have disadvantages such as low yield, high consumption, difficult synthesis, and poor stability, which cannot be used for a long time under actual application conditions, and most of the synthetic materials still stay at the microscopic scale. How to achieve large-scale macroscale high stability at one time Catalysts are a major problem in the field of nanocatalysis

Method used

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  • Cobalt diselenide modified carbon fiber composite material and preparation method and application thereof
  • Cobalt diselenide modified carbon fiber composite material and preparation method and application thereof
  • Cobalt diselenide modified carbon fiber composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Carbon felt (a total of three pieces, the volume is 1 × 1 × 0.3cm 3 , 1×1.5×0.3cm 3 and 1×2×0.3cm 3 , with a total mass of about 0.2 g) placed in a mixed solution of ethanol and water to ultrasonically remove surface oil.

[0036] Weigh 1 mmol of cobalt acetate and 1 mmol of sodium selenite and dissolve in a mixed solvent composed of 26 mL of diethylenetriamine and 13 mL of water, and stir for 10 minutes. Soak the treated carbon fiber felt in it and stir for 1 hour to form a mixture. Transfer the above mixture to a PTFE-lined 50mL reactor and seal it, react in a temperature-controlled oven at 180°C for 16 hours, take it out after completing the reaction and cool to room temperature; Dry in a vacuum environment for 6 hours to obtain CoSe 2 / CF composites.

[0037] CoSe prepared in this example 2 SEM image of / CF composite material figure 1 As shown, the inset is a partially enlarged SEM image. As can be seen from the illustration, the carbon fiber surface is even...

Embodiment 2

[0039] The graphitized carbon fiber felt (three pieces in total, the volume is 1×1×0.5cm 3 , 1×1.5×0.5cm 3 and 1×2×0.5cm 3 , with a total mass of about 0.2 g) placed in a mixed solution of ethanol and water to ultrasonically remove surface oil.

[0040] Weigh 2 mmol of cobalt acetate and 2 mmol of sodium selenite and dissolve in a mixed solvent composed of 26 mL of diethylenetriamine and 13 mL of water, and stir for 10 minutes. Immerse the treated graphitized carbon fiber felt in it and stir for 1 hour to form a mixture.

[0041] The above mixture was transferred to a polytetrafluoroethylene-lined 50mL reactor and sealed, and then reacted in a temperature-controlled oven at 180°C for 16 hours. After the reaction was completed, it was taken out and cooled to room temperature; the product was washed with ethanol and heated at 60 ℃ in a vacuum environment for 6 hours to obtain CoSe 2 / CF composites.

[0042] CoSe prepared in this example 2SEM image of / CF composite material...

Embodiment 3

[0052] Pre-oxidized graphite felt (a total of three pieces, the volume is 1 × 1 × 0.5cm 3 , 1×1.5×0.5cm 3 and 1×2×0.5cm 3 , with a total mass of about 0.2 grams) placed in a mixed solution of ethanol and water to ultrasonically remove surface oil.

[0053] Weigh 3mmol of cobalt acetate and 3mmol of sodium selenite and dissolve in a mixed solution composed of 26mL of diethylenetriamine and 13mL of water, and stir for 10 minutes.

[0054] Soak the treated pre-oxidized graphite felt in the above mixed solvent and stir for 1 hour to form a mixture. The above mixture was transferred to a polytetrafluoroethylene-lined 50mL reactor and sealed, and then reacted in a temperature-controlled oven at 180°C for 16 hours. After the reaction was completed, it was taken out and cooled to room temperature; the product was washed with ethanol and heated at 60 ℃ in a vacuum environment for 6 hours to obtain CoSe 2 / CF composites.

[0055] Figure 11 CoSe prepared for this example 2 The SE...

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Abstract

The invention discloses a cobalt diselenide modified carbon fiber composite material and a preparation method and application thereof. The invention is characterized in that the cobalt diselenide modified carbon fiber composite material is formed by loading a cobalt diselenide nanobelt on the surface of a carbon fiber felt and is prepared by the following steps: dissolving cobalt acetate and sodium selenite in a mixed solvent consisting of diethylenetriamine and water, then adding the carbon fiber felt, conducting reaction for 12-18 hours at 150-200 DEG C, and washing and drying the product to obtain the cobalt diselenide modified carbon fiber composite material. The cobalt diselenide modified carbon fiber composite material can be used as a catalyst in a water electro-catalysis hydrogen evolution reaction. The cobalt diselenide modified carbon fiber composite material has a simple synthetic method, is lower in production cost and can be produced in a large scale. The prepared cobalt diselenide modified carbon fiber composite material can be used as a catalyst in the water electro-catalysis hydrogen evolution reaction and has high activity and favorable stability.

Description

technical field [0001] The invention relates to a novel ribbon-shaped cobalt diselenide modified carbon fiber (CoSe 2 / CF) composite material Background technique [0002] With the rapid development of the world economy, the global demand for energy is increasing. Hydrogen, as a clean, recyclable and ideal energy carrier, has attracted more and more attention. As one of the promising hydrogen production methods, electrocatalytic hydrolysis hydrogen production is still using precious metal materials represented by platinum as catalysts. key to practical application. [0003] Cobalt-based materials are widely used in the research of electrochemical reaction catalysts due to their abundant earth reserves, easy synthesis, and important potential applications in the field of energy storage and conversion. In particular, cobalt-based chalcogenides (cobalt sulfide, cobalt diselenide, etc.) have high catalytic activity in electrocatalytic water splitting hydrogen, but due to the...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J35/06C25B1/04C25B11/06
CPCY02E60/36
Inventor 俞书宏郑亚荣高敏锐
Owner UNIV OF SCI & TECH OF CHINA
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