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Electrode for electrochemical reduction of carbon dioxide, preparation method and application thereof

A CO2, Electrochemical Technology

Active Publication Date: 2019-05-28
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, preparation method and application thereof
  • Electrode for electrochemical reduction of carbon dioxide, preparation method and application thereof
  • Electrode for electrochemical reduction of carbon dioxide, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The carbon paper was treated in the air at 550°C, and then degreased and cleaned in ethanol and acetone as the substrate; the concentration was 0.25M SnSO 4 solution, with 0.7M H 2 SO 4 And the Trix100 of 0.06M, mix and obtain mixture solution as electrolyte solution; In electrolyte solution, in N 2 Constant current density-60mA cm was carried out under the protection of atmosphere -2 Constant potential deposition for 2000s; 0.5M NaHCO in post-treatment electrolyte 3 The electrolytic solution was reduced with -1.2V for 900s; the Sn nanorod catalyst was prepared after washing and drying. from Figure 5 It shows that compared with Comparative Example 1, the performance of the electrode in Example 1 is significantly improved.

Embodiment 2

[0040] The carbon paper was treated in the air at 550°C, and then degreased and cleaned in ethanol and acetone as the substrate; the concentration was 0.25M SnSO 4 solution, with 0.8M H 2 SO 4 and 0.06 2M OP, mix well to obtain a mixture solution as an electrolyte solution; in the electrolyte solution, in N 2 Constant current density-60mA cm was carried out under the protection of atmosphere -2 Constant potential deposition for 2000s; 0.5M NaHCO in post-treatment electrolyte 3 The electrolytic solution was reduced with -1.2V for 900s; the Sn nanorod catalyst was prepared after washing and drying.

Embodiment 3

[0042] The carbon paper was treated in the air at 550°C, and then degreased and cleaned in ethanol and acetone as the substrate; the concentration was 0.25M SnSO 4 solution, with 0.8M H 2 SO 4 And the gelatin of 0.06M, mix to obtain mixture solution as electrolyte solution; In electrolyte solution, in N 2 Constant current density-60mA cm was carried out under the protection of atmosphere -2 Constant potential deposition for 2000s; 0.5M NaHCO in post-treatment electrolyte 3 The electrolytic solution was reduced with -1.2V for 900s; the Sn nanorod catalyst was prepared after washing and drying.

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Abstract

The invention discloses an electrode for electrochemical reduction of carbon dioxide and its preparation and application. It includes a base layer and a Sn catalyst nano-layer attached to the base layer. cm-2, the Sn in the electrode is composed of one or more of 1nm-500nm nanowires, nanorods, and nanofibers. The invention significantly increases the specific surface area and active area of ​​the electrode by in-situ growing Sn nanorods with abundant edge active sites on the substrate, and improves the Faradaic efficiency of the electrode for electrochemically reducing carbon dioxide to formic acid.

Description

technical field [0001] The invention relates to an electrode for electrochemical reduction of carbon dioxide, a preparation method and an application thereof, and belongs to the field of resource utilization of carbon dioxide. Background technique [0002] In recent years, with the rapid development of the economy, environmental problems and energy shortages have become increasingly serious. Among them, global warming has also become an urgent problem to be solved by countries all over 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 emissions have aroused widespread concern. [0003] At present, people adopt a variety of methods to reduce CO 2 emissions, including CO 2 Capture fixation and conversion utilization. CO 2 The conversion and utilization of CO include catalytic hydrogenation, catalytic reforming, electrochemical or chemical reduction conversion, etc., to r...

Claims

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Application Information

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Patent Type & Authority Patents(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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