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Preparation, electrode and application of an electrode for electrochemical reduction of carbon dioxide

A carbon dioxide, electrochemical technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve problems such as high toxicity and limitation, and achieve the effect of improving lifespan, improving stability, and simple and controllable preparation.

Active Publication Date: 2018-08-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since Pb, Hg and other metals are heavy metals, their toxicity is relatively high, which limits their practical application. 2 There are few studies on the preparation of organic acids by electrochemical reduction

Method used

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  • Preparation, electrode and application of an electrode for electrochemical reduction of carbon dioxide
  • Preparation, electrode and application of an electrode for electrochemical reduction of carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Toray060 carbon paper was treated in the air at 500°C, and then degreased and cleaned in ethanol or acetone as the substrate; in the presence of 0.04M Bi(NO 3 ) 3 With 25.4ml 36.5% HCl electrolyte solution at 30mA cm -2 Carry out metal deposition for 200s; wash and dry to finally obtain the electrode and oxidize it in the air at 20°C for 20min; place it in H 2 Reduction at 300°C for 60 minutes in a gas mixture with a volume ratio of 1:4 to Ar; after washing and drying, the electrode was finally obtained.

[0038] figure 1 It can be seen that the prepared electrode is a nanofibrous catalyst grown on carbon paper.

[0039] figure 2 The result in shows, embodiment 1 electrode has higher catalytic activity;

Embodiment 2

[0041] The carbon felt with a thickness of 200 μm was treated in the air at 550 ° C, and then degreased and cleaned in ethanol and acetone as the substrate; 3 ) 3 with 20.4ml of 36.5% HCl electrolyte solution at 120mAcm -2 Carry out metal deposition for 30s; wash and dry to finally obtain the electrode and oxidize it in air at 20°C for 60min; place it in H 2 Reduction at 300°C for 60 minutes in a gas mixture with a volume ratio of 1:4 to Ar; after washing and drying, the electrode was finally obtained.

Embodiment 3

[0043] Carbon paper with a thickness of 100 μm was treated in the air at 450 ° C, and then degreased in ethanol and acetone and cleaned as a substrate; 3 with 20.4ml of 36.5% HCl in electrolyte solution at 10mA cm -2 Carry out metal deposition for 30s; wash and dry to finally obtain the electrode and oxidize it in air at 400°C for 240min; place it in H 2 Reduction at 300°C for 60 min in a mixed gas with a volume ratio of 1:1 to Ar; after washing and drying, the electrode was finally obtained.

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Abstract

The invention relates to a method for preparing an electrode for electrochemical reduction of carbon dioxide, the electrode and its application. The electrode preparation method is to treat carbon felt and carbon paper in the air at 200-600 ° C, and then carry out the process in ethanol and acetone After degreasing treatment and cleaning, it is used as a substrate; metal deposition is carried out in an electrolyte solution at 5 mA cm-2 to 150 mA cm-2 for 1 to 3000 s; washing and drying are finally obtained. min-600 min; reduce it in H2 or a mixture of H2 and inert gas at 100-600°C for 30 min-240 min; wash and dry to finally obtain the electrode. The electrode prepared by the invention has controllable structure, high specific surface area and excellent selectivity for preparing formic acid by CO2 electrochemical reduction. This electrode has excellent ERC stability.

Description

technical field [0001] The invention relates to a preparation method and an application of an electrode for electrochemical reduction of carbon dioxide, and belongs to the field of resource utilization of carbon dioxide. Background technique [0002] Energy is an important material basis for national economic development and people's lives. At present, my country's economy and society are in a stage of rapid development, and the demand for energy continues to increase. CO 2 Gas emissions are also increasing. According to the latest report of the International Energy Agency (IEA), the global CO 2 Emissions reached 31.6 billion tons; by 2030, annual carbon dioxide emissions are expected to increase to 43 billion tons, an increase of 60%. Therefore, how to reduce CO 2 emissions, effective use of CO 2 It has become a research hotspot in recent years. [0003] CO 2 There are three main methods of emission reduction and utilization: (1) capture and storage, CO 2 Undergroun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B11/12
Inventor 钟和香张华民邱艳玲李先锋刘鑫
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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