Nanometer tin based catalyst for electrochemical reduction carbon dioxide reaction and preparation method and application thereof

A technology of tin dioxide and carbon dioxide, applied in the direction of tin oxide, nanotechnology for materials and surface science, nanotechnology, etc., can solve the problems of tin-based catalysts with insufficient selectivity and low current density, so as to increase activity, Effect of increasing active sites and increasing specific surface area

Inactive Publication Date: 2018-08-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the selectivity of the tin-based catalyst prepared by the above method is not good enough, and the Faraday efficiency of the product is usually lower than 90%; the current density is also very small, usually less than 10mA cm -2

Method used

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  • Nanometer tin based catalyst for electrochemical reduction carbon dioxide reaction and preparation method and application thereof
  • Nanometer tin based catalyst for electrochemical reduction carbon dioxide reaction and preparation method and application thereof
  • Nanometer tin based catalyst for electrochemical reduction carbon dioxide reaction and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Dissolve 1.0g polyvinylpyrrolidone (PVP, Mw=1,300,000) and 1.0g stannous chloride dihydrate in 5ml dimethylformamide (DMF) and 5ml ethanol mixed solvent, and stir at room temperature for 24h to obtain The spinning solution, which was transferred into a syringe, was placed on the syringe pump, and a piece of conductive carbon was placed 18 cm opposite to serve as the electrospinning receiver. Connect the high voltage power supply to the syringe needle and the ground wire to the conductive carbon. Apply high voltage of 15kV, the flow rate of the syringe pump is 0.3ml h -1 , after collecting for 4 hours, a composite fiber film of stannous chloride / polyvinylpyrrolidone / dimethylformamide / ethanol was obtained.

[0041] (2) Put the composite fiber film obtained in step (1) into a tube furnace and calcined for 2 hours in an air atmosphere, the calcining temperature was 500°C, and the heating rate was 5°C min -1 . Polyvinylpyrrolidone / dimethylformamide / ethanol will be dec...

Embodiment 2

[0048] (1) Mix 2.0g polyacrylonitrile (PAN, Mw=1,500,00) with 2.0g stannous acetate, 3ml N,N-dimethylformamide and 7ml dimethyl sulfoxide in a mixed solvent, stir at room temperature for 24h Finally, the spinning solution is obtained, which is transferred to a syringe, placed on a syringe pump, and a piece of conductive carbon is placed on the opposite side at 18 cm as an electrospinning receiving device. Connect the high voltage power supply to the syringe needle and the ground wire to the conductive carbon. Apply 20kV high voltage, the flow rate of the syringe pump is 0.4ml h -1 , after 4 hours of collection, the composite fiber film of stannous acetate / polyacrylonitrile / N,N-dimethylformamide / dimethyl sulfoxide was obtained.

[0049] (2) Put the composite fiber film obtained in step (1) into a tube furnace and calcinate for 1 h under air atmosphere, the calcining temperature is 400°C, and the heating rate is 5°C min -1 . N,N-dimethylformamide / dimethyl sulfoxide will be de...

Embodiment 3

[0053] (1) 0.5g polyvinyl alcohol (PAN, Mw=9,500,0) and 0.5g stannous sulfate are dissolved in 10ml water and 1ml ethanol mixed solvent, after stirring at room temperature for 24h, spinning solution is obtained, which is transferred to In the syringe, put it on the syringe pump, and place a piece of conductive carbon at the opposite side 18cm, as the electrospinning receiving device. Connect the high voltage power supply to the syringe needle and the ground wire to the conductive carbon. Apply high voltage of 15kV, the flow rate of the syringe pump is 0.5ml h -1 , after collecting for 4 hours, a stannous sulfate / polyvinyl alcohol / water / ethanol composite fiber film was obtained.

[0054] (2) Place the composite fiber film obtained in step (1) in a tube furnace and calcinate for 5 hours under air atmosphere, the calcining temperature is 650°C, and the heating rate is 5°C min -1 . The polyvinyl alcohol / water / ethanol will be decomposed and volatilized, the stannous sulfate will...

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Abstract

The invention discloses a nanometer tin based catalyst for an electrochemical reduction carbon dioxide reaction and a preparation method and application thereof. The nanometer tin based catalyst is ofa one-dimensional structure composed of a stannic oxide nanotube and a stannic oxide nanowire. The stannic oxide nanotube is arranged on the outer portion of the stannic oxide nanowire in a sleevingmanner. The nanometer tin based catalyst is prepared and obtained through combination of the one-step electrostatic spinning process and calcining treatment. The nanometer tin based catalyst in the special shape can be used for catalyzing the electrochemical reduction carbon dioxide reaction, and the Faradic efficiency and the current density of the reaction can be obviously improved.

Description

technical field [0001] The invention relates to the field of electrocatalytic reduction of carbon dioxide, in particular to a nano tin-based catalyst for electrochemical reduction of carbon dioxide and its preparation method and application. Background technique [0002] In view of climate change due to rising levels of carbon dioxide in the atmosphere, it is desirable to use advanced technologies to convert carbon dioxide. An ideal solution is to convert atmospheric carbon dioxide into carbon-products with higher energy density, such as carbon monoxide, formic acid, methanol, methane, and other usable renewable energy sources. Such a strategy would not only reduce the accumulation of carbon dioxide in the atmosphere, but also produce fuels and useful industrial chemicals, alleviating our dependence on traditional fossil resources. To this end, various CO2 reduction methods, including electrochemical, photochemical, biochemical, and thermochemical methods, have been propose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C25B3/04C25B11/06C01G19/02B82Y40/00B82Y30/00C25B3/25
CPCC25B1/00B82Y30/00B82Y40/00C01G19/02C01P2004/13C01P2004/16C25B3/25C25B11/077
Inventor 陆盈盈李中坚范磊夏峥
Owner ZHEJIANG UNIV
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