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Flowing electrolysis method for stably realizing efficient electro-catalysis carbon dioxide reduction under large current condition

A technology of electrocatalytic carbon dioxide and electrolysis method, which is applied in the direction of electrolysis process, electrolysis components, electrolysis organic production, etc., and can solve the problems of low catalytic selectivity and poor system stability

Active Publication Date: 2021-05-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention will solve the existing electrocatalytic CO 2 In order to solve the problems of low catalytic selectivity and poor system stability in reduction technology, a flow electrolysis method for stably realizing high-efficiency electrocatalytic carbon dioxide reduction under high current conditions is provided

Method used

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  • Flowing electrolysis method for stably realizing efficient electro-catalysis carbon dioxide reduction under large current condition
  • Flowing electrolysis method for stably realizing efficient electro-catalysis carbon dioxide reduction under large current condition
  • Flowing electrolysis method for stably realizing efficient electro-catalysis carbon dioxide reduction under large current condition

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specific Embodiment approach 1

[0029] Specific implementation mode one: combine figure 1 Specifically, this embodiment is a flow electrolysis method applied to stably realize high-efficiency electrocatalytic carbon dioxide reduction under high current conditions, which is completed according to the following steps:

[0030] 1. Preparation of gas diffusion electrode:

[0031] ① Weighing: Dissolve the copper salt and iron salt in the solvent, then add the surfactant, and stir and mix for 10min to 120min at a rotational speed of 500rpm to 1000rpm to obtain a reaction solution;

[0032] The molar ratio of the copper salt to the iron salt is (1~999):1; the volume ratio of the amount of the copper salt to the solvent described in step 1. is (0.5~2)mmol:100mL The volume ratio of the amount of the substance of the surfactant and the solvent described in step 1. is (0.5~2)mmol:100mL;

[0033] ②. Reduction: Under the condition of ice-water bath, pass argon or nitrogen gas into the reaction solution for 10-60 minute...

specific Embodiment approach 2

[0050] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the solvents described in step one 1. and step one 2. are all alcohol-containing organic solvents or water; the described alcohol-containing organic solvents are triethylene glycol Alcohol, ethylene glycol or glycerol; The solvent described in step one 5. is the mixed solution or ethanol of Virahol and Nafion; The volume ratio of Virahol and Nafion in the mixed solution of described Virahol and Nafion is ( 10~100):1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0051] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the copper salt described in Step 1. is copper nitrate, copper acetate, copper acetylacetonate, copper chloride, copper sulfate or acetic acid nitrite copper. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a flowing electrolysis method for stably realizing high-efficiency electro-catalysis carbon dioxide reduction under a high-current condition, and relates to an electro-catalysis carbon dioxide reduction method. The invention aims to solve the problems of low catalytic selectivity and poor system stability in the existing electrocatalytic CO2 reduction technology. The preparation method comprises the following steps: 1, preparing a gas diffusion electrode; 2, assembling equipment; 3, performing reduction. The flow electrolysis device is applied to flow electrolysis for stably realizing efficient electrocatalysis CO2 reduction under the condition of large current.

Description

technical field [0001] The invention relates to an electrocatalytic carbon dioxide reduction method. Background technique [0002] With the continuous development of society, human beings have an increasing demand for energy, but traditional fossil energy such as coal, oil, and natural gas is a primary energy source with limited reserves, and an energy crisis is inevitable. Moreover, the use of traditional fossil energy makes the CO in the atmosphere 2 Concentration continues to rise, resulting in increasing greenhouse effect, bringing a series of environmental problems, seriously affecting the normal life of human beings. [0003] Currently CO 2 Recycling technologies mainly include electrochemical reduction, thermal reduction and photochemical reduction. Due to CO 2 The bond energy of the carbon-oxygen bond (C=O) in the molecule is as high as 750kJ / mol, and the thermodynamic properties are stable, making CO 2 The reaction conditions required for the reduction are hars...

Claims

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Application Information

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IPC IPC(8): C25B3/03C25B3/26C25B11/032C25B11/089
Inventor 王志江时曜轩
Owner HARBIN INST OF TECH
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