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Preparation and application of a sn electrode for electrochemical reduction of carbon dioxide

A carbon dioxide and electrochemical technology, which is applied in the direction of electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of failure to conduct protons, electrode current density that cannot meet the use requirements, and large catalyst particles, so as to improve Faradaic efficiency, Effect of increasing effective active area and increasing reaction current density

Active Publication Date: 2021-06-29
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst particles prepared in this patent are relatively large, and the added organic additives do not play a role in conducting protons, so the electrode current density still cannot meet the requirements for use.

Method used

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  • Preparation and application of a sn electrode for electrochemical reduction of carbon dioxide
  • Preparation and application of a sn electrode for electrochemical reduction of carbon dioxide
  • Preparation and application of a sn electrode for electrochemical reduction of carbon dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The carbon felt or carbon paper treatment process is as follows: treatment in the air at 450°C, and then degreasing treatment and cleaning in ethanol and acetone; the Sn catalyst layer is obtained by electrochemical tin plating on the surface of the above substrate by means of potential; According to the mass ratio of Sn to sulfonate-containing polymer is 2:1, SnSO 4 with H 2 SO 4 The molar ratio of 1:2, the concentration of 0.25mol / L of SnSO 4 solution, with 0.5mol / L of H 2 SO 4 and 0.1mol / L perfluorosulfonic acid resin, mixed uniformly to obtain a mixture solution as an electrolyte solution; at a constant current density of -100mA / cm 2 , deposited for 600s, then at constant current density -60mA / cm 2 , deposited for 600s, and finally at a constant current density of -20mA / cm 2 , deposited for 300s; the substrate with the deposited Sn layer was reduced in 0.3mol / L KCl at -1.6V for 1800s; after washing and drying, it was placed in a vacuum oven at 150°C to obtain ...

Embodiment 2

[0052] The carbon felt or carbon paper treatment process is as follows: treatment in the air at 450°C, and then degreasing treatment and cleaning in ethanol and acetone; the Sn catalyst layer is obtained by electrochemical tin plating on the surface of the above substrate by means of potential; According to the mass ratio of Sn to sulfonate-containing polymer is 2:1, SnSO 4 with H 2 SO 4 The molar ratio is 1:2, the concentration is 0.25mol / LSnSO 4 solution, with 0.5mol / LH 2 SO 4 and 0.05mol / L sulfonated polysulfone resin, mixed evenly to obtain a mixture solution as an electrolyte solution; under N2, the constant current density is -100mA / cm 2 , deposited for 600s, then at constant current density -60mA / cm 2 , deposited for 800s, and finally at a constant current density of -20mA / cm 2 , deposited for 500s; the substrate with deposited Sn layer was placed in 0.3mol / L NaHCO 3 Reduction at -1.6V for 1800s; washing, drying, and drying in a vacuum oven at 150°C to prepare an...

Embodiment 3

[0056] The carbon felt or carbon paper treatment process is as follows: treatment in the air at 450°C, and then degreasing treatment and cleaning in ethanol and acetone; the Sn catalyst layer is obtained by electrochemical tin plating on the surface of the above substrate by means of potential; According to the mass ratio of Sn to sulfonate-containing polymer is 5:1, SnSO 4 with H 2 SO 4 The molar ratio of 1:2, the concentration of 0.25mol / L of SnSO 4 solution, with 0.4mol / L of H 2 SO 4 and 0.1mol / L sulfonated polysulfone resin, mixed evenly to obtain a mixture solution as an electrolyte solution; at a constant current density of -100mA / cm 2 , deposited for 600s, then at constant current density -60mA / cm 2 , deposited for 600s, and finally at a constant current density of -20mA / cm 2 , deposited for 300s; the substrate with deposited Sn layer was placed in 0.5mol / L KHCO 3 Reduction at -1.6V for 1800s; washing, drying, and drying in a vacuum oven at 150°C to prepare an el...

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Abstract

The invention relates to the preparation and application of a Sn electrode for electrochemical reduction of carbon dioxide, comprising a base layer and a Sn catalyst layer containing a sulfonate polymer material attached to the base layer. The preparation steps are: treating carbon felt or carbon paper , and then carry out degreasing treatment and cleaning in ethanol and acetone; electrochemical tin plating on the surface of the above-mentioned base layer by means of potential to obtain a Sn catalyst layer; under the protection of an inert atmosphere, the electrolyte solution is subjected to different constant current densities. Electrodeposit Sn on the bottom layer, and wash and dry the electrodeposited Sn catalyst layer with ethanol and water; perform a reduction reaction on the base layer on which the Sn catalyst layer is deposited in a post-treatment electrolyte; After drying in a vacuum oven, an electrode with a sulfonate-containing polymer-functionalized Sn catalyst was prepared. The invention can make the macromolecular material evenly grafted on the Sn surface, improve the stability of the electrode, and increase the proton concentration on the electrode surface.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of a Sn electrode for electrochemical reduction of carbon dioxide, and in particular relates to the preparation and application of a Sn electrode for electrochemical reduction of carbon dioxide. Background technique [0002] In terms of energy consumption and cost, the electrochemical reduction method has the advantages of being able to react at room temperature and pressure, low energy consumption, and high conversion efficiency. 2 One of the more feasible ways in transformation technology. ERC technology is the use of electricity to convert CO 2 Reduce to various organic small molecules or chemical products, effectively realize the greenhouse gas CO 2 A technology for resource utilization. With the rapid development of renewable energy power generation technology, the cost of power generation technology is expected to drop significantly. Use renewable energy to generate e...

Claims

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Application Information

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IPC IPC(8): C25B11/032C25B11/052C25B11/065C25B11/075C25B3/26C25D3/32C25D5/54C25D5/18C25D5/48C25B3/25
CPCC25D3/32C25D5/54C25D5/18C25D5/48C25B3/25C25B11/051C25B11/057C25B11/091
Inventor 钟和香潘立卫张晶
Owner DALIAN UNIV
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