Catalyst for carbon dioxide reduction through electrocatalysis and preparation method thereof

A carbon dioxide and catalyst technology, which is applied in the field of electrocatalytic carbon dioxide reduction, can solve the problems of poor catalyst stability, low current efficiency, and low selectivity of target products, and achieve the effect of increasing the contact specific surface area and improving efficiency

Inactive Publication Date: 2019-09-27
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Abstract
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Problems solved by technology

[0004] Electrocatalyst is the key to realize the electrocatalytic reduction of carbon dioxide. At present, the choice of electrode materials is mostly concentrated in noble metals or transition metals with high prices, which greatly increases the cost of catalysts. At the same time, the electrocatalytic process also has poor catalyst stability and the target product Therefore, it is of great research significance to prepare efficient and cheap carbon dioxide electrochemical reduction catalysts.

Method used

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  • Catalyst for carbon dioxide reduction through electrocatalysis and preparation method thereof

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Effect test

Embodiment 1

[0021] The preparation method of the catalyst for the electrocatalytic carbon dioxide reduction comprises the following steps:

[0022] (1) Preparation of fiber membrane precursor: take 1g of polyacrylonitrile and 1g of ferric nitrate in 10mL of N,N-dimethylformamide, stir for 12 hours, take a uniform solution, and use an electrospinning machine to prepare the Inhale the homogeneous solution into the syringe, install a needle of type 20, exhaust the air bubbles, set the voltage to 10KV, the flow rate to 0.02mm / min, the spinning distance to 13cm, the humidity to 20%, and the temperature to room temperature, start electrospinning, After 12h, the fiber membrane precursor was obtained;

[0023] (2) Preparation of nitrogen-doped carbon nanofiber composite iron particles: the fiber film precursor prepared in step (1) was placed in a tube furnace, and calcined in a mixed gas atmosphere composed of argon and hydrogen. The heating rate of ℃ / min is raised to 500 ℃, and the temperature ...

Embodiment 2

[0026] The preparation method of the catalyst for the electrocatalytic carbon dioxide reduction comprises the following steps:

[0027] (1) Preparation of fiber membrane precursor: take 2g of polyacrylonitrile and 2g of ferric nitrate in 20mL of N,N-dimethylformamide, stir for 24 hours, take a uniform solution, and use an electrospinning machine to prepare the Inhale the homogeneous solution into the syringe, install a needle of type 20, exhaust the air bubbles, set the voltage to 20KV, the flow rate to 0.08mm / min, the spinning distance to 20cm, the humidity to 50%, and the temperature to room temperature, start electrospinning, After 24h, the fiber film precursor is obtained;

[0028] (2) Preparation of nitrogen-doped carbon nanofiber composite iron particles: the fiber film precursor prepared in step (1) was placed in a tube furnace, and calcined in a mixed gas atmosphere composed of argon and hydrogen. The heating rate of ℃ / min is raised to 1000 ℃, and the temperature is k...

Embodiment 3

[0031] The preparation method of the catalyst for the electrocatalytic carbon dioxide reduction comprises the following steps:

[0032] (1) Preparation of fiber membrane precursor: take 1.5g of polyacrylonitrile and 1.5g of ferric nitrate in 15mL of N,N-dimethylformamide, stir for 18 hours, take a uniform solution, and use an electrospinning machine to prepare Inhale a good homogeneous solution into the syringe, install a needle of type 20, discharge air bubbles, set the voltage at 20KV, flow rate at 0.02mm / min, spinning distance at 13-20cm, humidity at 50%, and temperature at room temperature, start Electrospinning, after 24h, the fiber film precursor is obtained;

[0033] (2) Preparation of nitrogen-doped carbon nanofiber composite iron particles: the fiber film precursor prepared in step (1) was placed in a tube furnace, and calcined in a mixed gas atmosphere composed of argon and hydrogen. The heating rate of ℃ / min is raised to 800 ℃, and the temperature is kept for 3 hou...

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Abstract

The invention belongs to the technical field of carbon dioxide reduction through electrocatalysis, and particularly relates to a catalyst for carbon dioxide reduction through electrocatalysis and a preparation method thereof. The catalyst is nitrogen-doped carbon nanofiber composite iron sulfide particles. The catalyst has high electrocatalytic activity and selectivity on the carbon dioxide reduction, in particular, can significantly improve the energy efficiency for carbon dioxide utilization; in addition, the preparation method of the catalyst has the advantages of simple operation, environmental friendliness, high yield, and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic carbon dioxide reduction, and in particular relates to a catalyst for electrocatalytic carbon dioxide reduction and a preparation method thereof. Background technique [0002] With the rapid development of industry, the earth's ecological environment is being severely damaged, and the most influential one is the so-called greenhouse effect. The most direct cause of the greenhouse effect is the increase of carbon dioxide in the atmosphere. It is reported that the current concentration of carbon dioxide in the atmosphere is about 350×10 -6 , and the annual emission of carbon dioxide in the world is about 2 billion tons. If the emission continues at this rate, it is estimated that by 2030 the content of carbon dioxide in the atmosphere will reach 560×10 -6 , As a result, the average temperature of the earth will rise by 1.5-4.5°C. Rising temperatures will desiccate subtropical regions, inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C25B1/04C25B11/06
CPCB01J27/24B01J35/0033B01J35/1004C25B1/04C25B11/04Y02E60/36Y02P20/10
Inventor 王新王加义
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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