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Application of CuO-CuCo2O4 catalyst in electrochemical CO2 reduction

A cuo-cuco2o4, 1.cuo-cuco2o4 technology is applied in the application field of CuO-CuCo2O4 catalyst in electrochemical reduction of CO2, achieving the effects of excellent electrochemical performance, broad application prospects and large specific surface area

Active Publication Date: 2018-10-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Katherine B.Holt in (Wang L, et al.In situ spectroscopic monitoring of CO 2 reduction at copper oxide electrode[J].Faraday discussions,2017,197:517-532.) Using CuO as electrode to catalyze CO by in situ preparation method 2 reduction to formic acid, but only CO 2 Catalytic reduction to one product only progresses to CO 2 The first step of catalytic reduction does not continue to catalyze it into alcohols, aldehydes and other products with more research and practical value

Method used

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  • Application of CuO-CuCo2O4 catalyst in electrochemical CO2 reduction
  • Application of CuO-CuCo2O4 catalyst in electrochemical CO2 reduction
  • Application of CuO-CuCo2O4 catalyst in electrochemical CO2 reduction

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Experimental program
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Effect test

Embodiment 1

[0037] Solvothermal Synthesis of CuO-CuCo in Isopropanol / Glycerol Mixed Solvent System 2 o 4 The preparation method of catalyst comprises the following steps:

[0038] Step 1: Weigh 0.107g of cobalt nitrate trihydrate and 0.072g of copper nitrate trihydrate into a 100mL beaker, then add 36mL of isopropanol, then add 18mL of glycerin, and magnetically stir until the reactants are completely dissolved;

[0039] The second step: transfer the solution obtained in the first step to a 100mL hydrothermal kettle, and react at a constant temperature of 180°C for 12h;

[0040] Step 3: Cool the reaction product of the second step to room temperature, then centrifuge, wash, and dry;

[0041]Step 4: Take out 50 mg of the dried product in the third step and put it in a quartz magnetic boat, and then calcinate at a constant temperature of 600 °C for 2 hours at a heating rate of 1 °C / min in an air atmosphere to obtain a hollow structure CuO-CuCo 2 o 4 catalyst.

[0042] Prepared CuO-CuCo...

Embodiment 2

[0044] Solvothermal Synthesis of CuO-CuCo in Isopropanol / Ethylene Glycol Mixed Solvent System 2 o 4 The preparation method of catalyst comprises the following steps:

[0045] Step 1: Weigh 0.87g of cobalt acetate and 0.051g of copper chloride dihydrate into a 100mL beaker, then add 45mL of isopropanol, then add 5mL of ethylene glycol, and stir magnetically until the reactants are completely dissolved;

[0046] The second step: transfer the solution obtained in the first step to a 100mL hydrothermal kettle, and react at a constant temperature of 180°C for 12h;

[0047] Step 3: Cool the reaction product of the second step to room temperature, then centrifuge, wash, and dry;

[0048] The fourth step: take out 50 mg of the dried product in the third step and put it in a quartz magnetic boat, and then calcinate at a constant temperature of 450°C for 2 hours at a heating rate of 2°C / min in an air atmosphere to obtain CuO-CuCo 2 o 4 catalyst.

[0049] figure 2 a and image 3 ...

Embodiment 3

[0051] Solvothermal Synthesis of CuO-CuCo in Ethanol / Glycerol Mixed Solvent System 2 o 4 The preparation method of catalyst comprises the following steps:

[0052] Step 1: Weigh 0.087g of cobalt nitrate hexahydrate and 0.048g of copper sulfate into a 100mL beaker, then add 30mL of ethanol, then add 30mL of glycerin, and stir magnetically until the reactants are completely dissolved;

[0053] The second step: transfer the solution obtained in the first step to a 100mL hydrothermal kettle, and react at a constant temperature of 180°C for 12h;

[0054] Step 3: Cool the reaction product of the second step to room temperature, then centrifuge, wash, and dry;

[0055] Step 4: Take out 50 mg of the dried product in the third step and put it in a quartz magnetic boat, and then calcinate at a constant temperature of 400°C for 2 hours at a heating rate of 5°C / min in an air atmosphere to obtain CuO-CuCo 2 o 4 catalyst.

[0056] figure 2 b and image 3 b is the CuO-CuCo prepared i...

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Abstract

The invention discloses an application of a CuO-CuCo2O4 catalyst in electrochemical CO2 reduction. During the process of electrochemical CO2 reduction, the CuO-CuCo2O4 catalyst is dispersed in an isopropanol solution, then a Nafion solution (5 wt.%) is added, then ultrasonic dispersion is performed to obtain uniform slurry; the slurry is painted on the surface of a preprocessed electrode, then nitrogen is introduced into electrolyte to remove oxygen, CO2 is introduced into the electrolyte to obtain electrolyte with saturated CO2, finally, a three-electrode test system is adopted, the slurry coated electrode is taken as a work electrode, and CO2 is electrochemically reduced by a linear sweep voltammetry method or a controlled potential electrolysis method. The CuO-CuCo2O4 catalyst can effectively and electrochemically reduce CO2 into liquid fuels namely formic acid (C1) and ethanol (C2), the selectivity is high, CO2 is converted into more valuable alcohols and aldehydes, and the catalyst has a wide application prospect in fields such as catalysis, energy storage, energy conversion, and the like.

Description

technical field [0001] The invention belongs to the technical field of new energy materials and relates to a CuO-CuCo 2 o 4 Catalysts in the electrochemical reduction of CO 2 in the application. Background technique [0002] Energy shortage and environmental pollution have become important issues facing society today. With the continuous reduction of non-renewable energy sources, atmospheric CO 2 The content of increasing, so the reduction of CO 2 The preparation of clean energy has become a technological hotspot of global concern today. [0003] Currently, reducing CO 2 The methods mainly include chemical method, electrochemical method and photocatalytic method. The electrochemical reduction of CO 2 The required experimental device is simple, easy to operate, and easy to carry out large-scale expansion; temperature has little effect on the reaction, and it is also possible to easily change the test conditions to control the type of reduction products, and adjust the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C25B3/04C25B11/06C25B3/25
CPCB01J23/75C25B3/25C25B11/091B01J35/33B01J35/60
Inventor 郝青丽范佳维叶海涛焦新艳雷武夏锡锋
Owner NANJING UNIV OF SCI & TECH
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