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Electrode for electrochemical reduction of carbon dioxide, as well as preparation method and application of electrode

A carbon dioxide and electrochemical technology, applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of cumbersome electrode production process, complicated preparation method, and decreased activity ratio, so as to improve the effective active area, simple preparation method, and simple method Effect

Active Publication Date: 2017-06-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation method is more complicated, and the performance of the electrode is lower (Faraday efficiency is less than 60%)
In addition, the above-mentioned electrodes mainly prepare Sn catalysts on tin foil and glassy carbon electrodes by various methods. In the actual application process, the prepared catalysts need to be scraped off the electrodes, and then coated on the surface of the carbon substrate with a binder. , resulting in a cumbersome electrode fabrication process, and the preparation of the catalyst due to the coating of the binder, the activity specific surface area decreases, resulting in a decrease in activity

Method used

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  • Electrode for electrochemical reduction of carbon dioxide, as well as preparation method and application of electrode
  • Electrode for electrochemical reduction of carbon dioxide, as well as preparation method and application of electrode
  • Electrode for electrochemical reduction of carbon dioxide, as well as preparation method and application of electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Treat the carbon paper in the air at 550°C, then degrease in ethanol and acetone and clean it as the substrate; set the concentration to 0.25M SnSO 4 Solution, with 0.7M H 2 SO 4 And 0.06M Trix100, mix evenly to obtain the mixture solution as the electrolyte solution; in the electrolyte solution, in the N 2 Constant current density -60mA cm under atmosphere protection -2 Constant potential deposition for 2000s; 0.5M NaHCO in the post-treatment electrolyte 3 Reduced with -1.2V in the electrolyte solution for 900s; washed and dried to prepare the Sn nanorod catalyst. From Figure 5 It shows that compared with Comparative Example 1, the electrode performance in Example 1 is significantly improved.

Embodiment 2

[0040] Treat the carbon paper in the air at 550°C, then degrease in ethanol and acetone and clean it as the substrate; set the concentration to 0.25M SnSO 4 Solution, with 0.8M H 2 SO 4 And 0.06 2M OP, mix evenly to obtain the mixture solution as the electrolyte solution; in the electrolyte solution, in the N 2 Constant current density -60mA cm under atmosphere protection -2 Constant potential deposition for 2000s; 0.5M NaHCO in the post-treatment electrolyte 3 Reduced with -1.2V in the electrolyte solution for 900s; washed and dried to prepare the Sn nanorod catalyst.

Embodiment 3

[0042] Treat the carbon paper in the air at 550°C, then degrease in ethanol and acetone and clean it as the substrate; set the concentration to 0.25M SnSO 4 Solution, with 0.8M H 2 SO 4 And 0.06M gelatin, mix evenly to obtain the mixture solution as the electrolyte solution; in the electrolyte solution, in N 2 Constant current density -60mA cm under atmosphere protection -2 Constant potential deposition for 2000s; 0.5M NaHCO in the post-treatment electrolyte 3 Reduced with -1.2V in the electrolyte solution for 900s; washed and dried to prepare the Sn nanorod catalyst.

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Abstract

The invention discloses an electrode for electrochemical reduction of carbon dioxide, as well as preparation and application of the electrode. The electrode comprises a basal layer and a Sn catalyst nanolayer attached to the basal layer, wherein the carrying capacity of a Sn catalyst is 1mg / cm<-2> to 6mg / cm<-2>; and Sn in the electrode is composed of one, two or more of 1-500nm nanowire, nanorod and nanofiber. According to the invention, the Sn nanorod with rich edge active sites grows on a base in situ, so that the specific area and active area of the electrode are remarkably increased, and the Faraday efficiency of electrochemical reduction of carbon dioxide into formic acid by the electrode is improved.

Description

Technical field [0001] The invention relates to an electrode for electrochemical reduction of carbon dioxide, a preparation method and application thereof, and belongs to the field of carbon dioxide resource utilization. Background technique [0002] In recent years, with the rapid economic development, environmental problems and energy shortages have become increasingly serious. Among them, global warming has also become an urgent problem to be solved by all countries in the world, and CO 2 The large amount of emissions is one of the main causes of global warming. Therefore, how to effectively use CO 2 And reduce CO 2 The emissions caused widespread concern. [0003] Currently, people use a variety of methods to reduce CO 2 Emissions, including CO 2 Capture fixation and transformation utilization. CO 2 The conversion and utilization of CO include catalytic hydrogenation, catalytic reforming, electrochemical or chemical reduction conversion, etc., to achieve CO 2 Activation and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/12
CPCC25B11/04C25B11/043C25B11/051C25B11/073C25B11/075
Inventor 钟和香张华民邱艳玲邓呈维李先锋
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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