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Copper-based carbon dioxide electro-catalytic material and preparation method thereof

A technology of electrocatalytic materials and carbon dioxide, applied in the field of electrocatalytic materials, can solve problems such as poor catalytic performance, achieve good uniformity, good catalytic performance, and improve catalytic performance

Active Publication Date: 2020-09-01
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a copper-based carbon dioxide electrocatalytic material and its preparation method, aiming at solving the problem of reducing the solid copper oxide precursor by using a negative voltage reduction method in the prior art, which leads to the production of Obtained OD-Cu CO 2 The problem of poor catalytic performance

Method used

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  • Copper-based carbon dioxide electro-catalytic material and preparation method thereof
  • Copper-based carbon dioxide electro-catalytic material and preparation method thereof
  • Copper-based carbon dioxide electro-catalytic material and preparation method thereof

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Embodiment 1

[0045] The experimental control group of OD-Cu carbon dioxide electrocatalytic material, its preparation method is: cut the 99.999% high-purity copper sheet to the size of 0.5cm×2cm, ultrasonic in deionized water, ethanol and acetone for 10 minutes, and then the copper sheet Polish for 3 minutes at +4V vs. RHE voltage. Immediately put the polished copper piece into the pre-prepared oxidant solution containing 1M potassium persulfate and 3M NaOH. After reacting for 60 minutes, the oxidized copper sheet was taken out and washed with deionized water. Then the samples were placed in a nitrogen atmosphere glove box for negative voltage electroreduction, and the reduction was performed at -1V vs. RHE voltage for 30min. After the reaction, the reduced copper sheet was taken out and washed with deionized water. That is, the OD-Cu material (experimental control group) was obtained.

Embodiment 2

[0047] A new strategy for the preparation of OD-Cu carbon dioxide electrocatalytic materials. The preparation method is as follows: cut 99.999% high-purity copper sheets to a size of 0.5 cm × 2 cm, ultrasonically in deionized water, ethanol and acetone for 10 minutes, and then The copper strips were polished for 3 minutes at +4Vvs.RHE voltage. Immediately put the polished copper piece into a pre-prepared oxidant solution containing 0.01M cetyltrimethylammonium bromide, 1M potassium persulfate and 3M NaOH. After reacting for 60 minutes, the oxidized copper sheet was taken out and washed with deionized water. Subsequently, the sample and the pre-prepared 0.1 M potassium bromide solution containing 5 mM sodium nitrilotriacetate were placed in a nitrogen atmosphere glove box, and reacted for 30 min under heating at 80°C and gentle stirring. After the reaction, the reduced copper sheet was taken out and washed with deionized water. That is, an OD-Cu material (0.01M ligand) was ob...

Embodiment 3

[0049] A new strategy for the preparation of OD-Cu carbon dioxide electrocatalytic materials. The preparation method is as follows: cut 99.999% high-purity copper sheets to a size of 0.5 cm × 2 cm, ultrasonically in deionized water, ethanol and acetone for 10 minutes, and then The copper strips were polished for 3 minutes at +4Vvs.RHE voltage. Immediately put the polished copper piece into a pre-prepared oxidant solution containing 0.1M cetyltrimethylammonium bromide, 1M potassium persulfate and 3M NaOH. After reacting for 60 minutes, the oxidized copper sheet was taken out and washed with deionized water. Subsequently, the sample and the pre-prepared 0.1 M potassium bromide solution containing 5 mM sodium nitrilotriacetate were placed in a nitrogen atmosphere glove box, and reacted for 30 min under heating at 80°C and gentle stirring. After the reaction, the reduced copper sheet was taken out and washed with deionized water. That is, an OD-Cu material (0.1M ligand) was obta...

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Abstract

The invention discloses a copper-based carbon dioxide catalytic material and a preparation method thereof. The method comprises the steps that: an oxidizing agent solution and an organic ligand solution are mixed, so that a first mixed solution is prepared; metal copper is put into the mixed solution, so that the organic ligand is adsorbed on the specific crystal face of the metal copper, and thecrystal face, not adsorbed by the organic ligand, of the metal copper is subjected to an oxidation reaction; cleaning treatment is carried out on the metal copper after the oxidation reaction, and theorganic ligand adsorbed on the crystal face of the metal copper can be removed; and the cleaned metal copper is immersed into a second mixed solution containing a reducing agent and halogen ion salt,mixed with the second mixed solution, and an obtained mixed solution is heated to react for a preset time, and the copper-based carbon dioxide electro-catalytic material can be obtained. By adoptingthe reduction method disclosed by the invention, a proper amount of halogen elements can be doped into the metal copper, so that the catalytic performance of the catalyst and the selectivity of a multi-carbon product are improved.

Description

technical field [0001] The invention relates to the field of electrocatalytic materials, in particular to a copper-based carbon dioxide electrocatalytic material and a preparation method thereof. Background technique [0002] As we all know, CO 2 The concentration in the atmosphere is increasing day by day, and has now exceeded the level of CO 2 The safe limit concentration (350ppm). CO 2 Theoretically, the emission and consumption of carbon dioxide should be in a state of dynamic balance, but the rapid development of the industrialization process accompanied by the massive consumption of fossil fuels makes CO 2 Excessive emissions and accumulation will lead to a series of negative effects, including the greenhouse effect, ocean acidification, melting glaciers, etc., which will destroy the environment in which humans live. CO 2 The reduction of a series of chemicals can be obtained, including CO, formic acid and multi-carbon organic compounds with higher energy density ...

Claims

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Application Information

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IPC IPC(8): B01J27/122B01J23/72B01J37/34B01D53/86B01D53/62C25B11/06C25B3/04C25B3/25
CPCB01J27/122B01J23/72B01J37/348B01D53/86B01D53/62C25B11/04B01D2257/504B01J35/33
Inventor 林鹏陈聪聪徐喆曾燮榕
Owner SHENZHEN UNIV