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A bimetallic gas diffusion electrode and its preparation method and application

A gas diffusion electrode and bimetal technology, applied in the field of electrochemical catalysis, can solve the problems of low energy utilization rate, poor product selectivity, and easy deactivation of catalysts in electrochemical reduction of carbon dioxide, thereby increasing the catalytic activity of electrochemical reduction, inhibiting Hydrogen evolution reaction and the effect of improving Faradaic efficiency

Active Publication Date: 2021-11-12
SINOPEC NANJING RES INST OF CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the low energy utilization rate of electrochemical reduction of carbon dioxide, poor product selectivity, and easy deactivation of catalysts are the main factors that limit its application. The key to solving this problem is to develop electrode materials with specific selectivity and high catalytic activity.

Method used

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  • A bimetallic gas diffusion electrode and its preparation method and application
  • A bimetallic gas diffusion electrode and its preparation method and application
  • A bimetallic gas diffusion electrode and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1: catalyst preparation

[0046] Preparation concentration is 0.075% sodium borohydride solution, concentration is 1% trisodium citrate solution, concentration is 10% chloroauric acid solution and concentration is 10% silver nitrate solution, 100mg multi-walled carbon nanotubes are placed in Put in a beaker containing 50mL deionized water and ultrasonically disperse for 30min, measure 150mL deionized water and add it to a 500mL round bottom flask, add 1mL chloroauric acid solution and 1mL silver nitrate solution, add 2mL trisodium citrate solution and 2mL Sodium borohydride solution, finally add multi-walled carbon nanotubes after ultrasonic dispersion, stir evenly in ice-water bath for 2h, the stirring rate is 500rpm, after centrifugation, washing, vacuum drying, the gold-silver bimetallic catalyst supported by multi-walled carbon nanotubes is obtained , which is the electrochemical reduction catalyst of carbon dioxide, called AuAg / CNTs catalyst.

Embodiment 2

[0047] Embodiment 2: catalyst preparation

[0048] The specific preparation process is as shown in Example 1. Only changing the type of the precursor solution of the second metal, adding 1 mL of copper acetylacetonate solution with a concentration of 10%, can obtain the gold-copper bimetallic catalyst supported by multi-walled carbon nanotubes , called AuCu / CNTs catalyst.

Embodiment 3

[0049] Embodiment 3: catalyst preparation

[0050] The specific preparation process is as shown in Example 1. Only changing the type of the precursor solution of the second metal, adding 1 mL of nickel chloride solution with a concentration of 10%, can obtain the gold-nickel bimetallic catalyst supported by multi-walled carbon nanotubes , called AuNi / CNTs catalyst.

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Abstract

The invention relates to a gas diffusion electrode, its preparation method and its application in the preparation of carbon monoxide by electrochemical reduction of carbon dioxide. The gas diffusion electrode includes a gas diffusion electrode body, and a carbon dioxide electrochemical reduction catalyst supported on the gas diffusion electrode body; the carbon dioxide electrochemical reduction catalyst is a multi-walled carbon nanotube loaded gold-based bimetal, and the gold-based bimetal It is composed of one of silver, copper, nickel, bismuth, zinc, iron, indium, cobalt and gold. The gas diffusion electrode can improve the faradaic efficiency of producing carbon monoxide in the electrochemical reduction of carbon dioxide, and can effectively inhibit the hydrogen evolution reaction.

Description

technical field [0001] The invention relates to the field of electrochemical catalysis, in particular to a gas diffusion electrode, a preparation method thereof and an application in preparation of carbon monoxide by electrochemical reduction of carbon dioxide. Background technique [0002] Carbon dioxide electrochemical reduction is an important direction of carbon dioxide resource utilization technology, which can convert carbon dioxide into gaseous carbon monoxide, methane, ethylene, ethane, propylene, propane and liquid formic acid, methanol, formaldehyde, acetic acid, ethanol, ethane Aldehyde, ethylene glycol, oxalic acid and other substances produce economically valuable chemicals while slowing down the greenhouse effect brought by carbon dioxide. They have dual benefits of environment and economy, and have received extensive attention in recent years. [0003] Carbon dioxide is the product of the highest oxidation stage of carbon. From the perspective of chemical chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/23C25B11/032C25B11/052C25B11/054C25B11/065C25B11/091B01J23/89B01J23/52B01J23/66B01J23/68
CPCB01J23/52B01J23/66B01J23/681B01J23/8906B01J23/8926C25B1/00
Inventor 毛松柏傅杰李海涛黎梓浩黄汉根吕秀阳汪东陈曦郭本帅
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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