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Method for enhancing electroreduction of carbon dioxide to generate carbon monoxide through external magnetic field

A carbon dioxide and carbon monoxide technology, applied in the field of electrochemistry, can solve the problems of inappropriateness, consumption of flow electrolytic cells, limited current density, etc., to achieve the effect of performance degradation, waste reduction, and permanent stability.

Active Publication Date: 2021-12-10
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the carbon dioxide electroreduction reaction, the current main way is through electrocatalysis and photocatalysis, and its current density is limited.
Although the use of a flow electrolytic cell can increase its current density, the flow electrolytic cell itself needs to consume extra power to make it run, so it is not suitable for practical applications.

Method used

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  • Method for enhancing electroreduction of carbon dioxide to generate carbon monoxide through external magnetic field
  • Method for enhancing electroreduction of carbon dioxide to generate carbon monoxide through external magnetic field
  • Method for enhancing electroreduction of carbon dioxide to generate carbon monoxide through external magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] First weigh Zn(NO 3 ) 2 ·6H 2 O1.5 mmol, dissolved in 3 ml of deionized water, weighed 2-methylimidazole (5.5 g) and dissolved in 20 ml of deionized water, then mixed the above two solutions, and stirred at room temperature for 6 h. After the stirring was completed, it was centrifuged several times, 3 times, at 5000 rpm, and then dried overnight in an oven at 80 °C for 12 h to obtain a solid sample. Then weigh an equal mass of Ni(NO 3 ) 2 ·6H 2 O, dissolved together with the solid sample in 10 ml of alcohol-water mixture (volume ratio of ethanol: water: 1:1), stirred at room temperature for 4 h, and dried overnight at 80 °C for 12 h. Finally put it at 900 °C, N 2 Under atmosphere protection, the heating rate was 2°C / min, fired for 3.5 h, cooled to room temperature, pickled with 1 M hydrochloric acid for 2 h, finally washed with water, filtered and dried. Obtain MOF-Zn / Ni.

[0044] Current density increase (Δ j ) reaches a maximum value of 1.97 mA cm -2 . This...

Embodiment 2

[0046] Another scheme for preparing the catalyst, first weigh the Co(NO 3 ) 2 ·6H 2 O 1.5 mmol was dissolved in 3 ml of deionized water, 5.5 g of 2-methylimidazole was dissolved in 20 ml of deionized water, and then the above two solutions were mixed and stirred at room temperature for 6 h. After the stirring was completed, it was centrifuged several times, 3 times, at 5000 rpm, and then dried overnight in an oven at 80 °C for 12 h to obtain a solid sample. Then weigh an equal mass of Ni(NO 3 ) 2 ·6H 2 O, dissolved together with the solid sample in 10 ml of alcohol-water mixture, the volume ratio of ethanol: water was 1:1, stirred at room temperature for 4 h, and dried overnight at 80 °C for 12 h. Finally put it at 900 °C, N 2 Under atmosphere protection, the heating rate was 2 ℃ / min, fired for 3.5 h, cooled to room temperature, pickled with 1 M hydrochloric acid for 2 h, finally washed with water, filtered and dried. Obtain MOF-Co / Ni.

Embodiment 3

[0048] First weigh Zn(NO 3 ) 2 ·6H 2 O0.5 mmol, and Co(NO 3 ) 2 ·6H 2 O1.0 mmol, dissolved in 3 ml of deionized water, 5.5 g of 2-methylimidazole, dissolved in 20 ml of deionized water, then mixed the above two solutions, stirred at room temperature for 6 h. After the stirring was completed, it was centrifuged several times, 3 times, at 5000 rpm, and then dried overnight in an oven at 80 °C for 12 h to obtain a solid sample. Then weigh an equal mass of Ni(NO 3 ) 2 ·6H 2 O, dissolved together with the solid sample in 10 ml of alcohol-water mixture with a volume ratio of ethanol:water of 1:1, stirred at room temperature for 4 h, and then dried overnight at 80 °C for 12 h. Finally put it at 900 °C, N 2 Under atmosphere protection, the heating rate was 2 ℃ / min, fired for 3.5 h, cooled to room temperature, pickled with 1 M hydrochloric acid for 2 h, finally washed with water, filtered and dried. Obtain MOF-Zn / Co / Ni.

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Abstract

The invention discloses a method for enhancing and promoting electroreduction of carbon dioxide to generate carbon monoxide through an external magnetic field, which provides the Faraday efficiency of applying external magnetic fields with different intensities to promote the electroreduction reaction of carbon dioxide to generate carbon monoxide, and obviously increases the current. According to the method, a metal organic framework material containing nickel metal is used as a magnetic response catalyst, a catalytic active center can exist, and response can be generated to an external magnetic field. According to the method, the energy utilization rate can be obviously increased, energy loss is reduced, the energy conversion efficiency is improved, and the method has wide application prospects in the energy field.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and relates to a method for strengthening by an external magnetic field, in particular to a method for strengthening the electroreduction of carbon dioxide to generate carbon monoxide by an external magnetic field. [0002] technical background [0003] Due to the growing global environmental crisis, the emission, transformation and storage of greenhouse gases have attracted increasing attention. Among these challenges, the CO 2 Converting to an efficient chemical energy source has become one of the great problems in modern chemistry. CO 2 The electrochemical reduction is an ideal technology to achieve sustainable development, because it can not only mitigate CO 2 The impact of transitional emissions on the environment is also a clean and alternative way of fossil raw materials. However, under practical conditions, CO 2 The reduced products are mainly limited by factors such as poor Faradaic e...

Claims

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Application Information

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IPC IPC(8): C25B1/23C25B1/50C25B9/60C25B9/63C25B15/02
CPCC25B1/23C25B1/50C25B15/02C25B9/60C25B9/63Y02E60/36
Inventor 徐朗魏仕林刘伟琪白沛瑶杨闯闯
Owner CHINA UNIV OF MINING & TECH
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