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A method for preparing carbon monoxide by electrochemical reduction of carbon dioxide

A carbon dioxide and carbon monoxide technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problem of scarcity of catalytic materials, and achieve the effect of inhibiting hydrogen evolution reaction, reducing hydrogen evolution reaction and catalyst deactivation effect, and increasing contact area.

Active Publication Date: 2021-12-31
SINOPEC NANJING RES INST OF CHEM IND CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the products of electrochemical reduction of carbon dioxide are mainly carbon monoxide, formic acid, methanol, etc. However, catalytic materials that can convert carbon dioxide into carbon monoxide with high selectivity and high efficiency are still very scarce.

Method used

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  • A method for preparing carbon monoxide by electrochemical reduction of carbon dioxide
  • A method for preparing carbon monoxide by electrochemical reduction of carbon dioxide
  • A method for preparing carbon monoxide by electrochemical reduction of carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: catalyst preparation

[0043] Preparation concentration is that the sodium borohydride solution of 0.075%, the trisodium citrate solution that concentration is 1%, the chloroauric acid solution that concentration is 10% and the silver nitrate solution that concentration is 10%, place 100mg multi-walled carbon nanotubes 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, call...

Embodiment 2

[0044] Embodiment 2: catalyst preparation

[0045] 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

[0046] Embodiment 3: catalyst preparation

[0047] 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 method for preparing carbon monoxide by electrochemical reduction of carbon dioxide, comprising: adopting an H-type double electrochemical cell reactor, separated by a proton exchange membrane into a cathode chamber and an anode chamber; feeding carbon dioxide gas into the cathode chamber before the reaction; using three electrodes The system uses a gas diffusion electrode as a working electrode, a platinum electrode as an auxiliary electrode, and a silver / silver chloride electrode as a reference electrode; the gas diffusion electrode includes a gas diffusion electrode body and a carbon dioxide electrochemical reduction catalyst loaded on the gas diffusion electrode body ; The carbon dioxide electrochemical reduction catalyst is a gold-based bimetal supported by multi-walled carbon nanotubes. This method can improve the faradaic efficiency of the product carbon monoxide.

Description

technical field [0001] The invention relates to the technology of electrochemically reducing carbon dioxide, in particular to a method for preparing carbon monoxide by electrochemically reducing carbon dioxide. Background technique [0002] At present, about 80% of the energy needed in the world is obtained by burning fossil fuels, and the combustion process causes the world to emit about 34 billion tons of CO into the atmosphere every year. 2 . Due to CO 2 The thermal power is very low, it is difficult to be reduced to a renewable product, making most of the CO 2 Exhausted as waste gas, for example a lignite power station can produce a total of 50,000 tons of CO per day 2 . In addition CO 2 Belonging to greenhouse gases, it causes global warming, ocean acidification, and soil desertification, causing great negative effects on the environment. [0003] CO 2 The conversion is to reduce CO 2 One of the effective measures of displacement. It can be mainly carried out b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/23C25B9/19C25B11/032C25B11/091
CPCC25B1/00
Inventor 毛松柏傅杰李海涛黎梓浩汪东吕秀阳陈曦郭本帅
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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