A composite material with electrocatalytic carbon dioxide reduction performance, preparation method and application thereof

A carbon composite material, carbon dioxide technology, applied in chemical instruments and methods, physical/chemical process catalysts, electrodes, etc., can solve the problems of expensive raw materials, low Faradaic efficiency, high overpotential, and achieve low cost, high mechanical strength, phase Good capacitive effect

Active Publication Date: 2019-10-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The electrocatalytic reduction of carbon dioxide studied by the predecessors is usually realized by noble metals such as Ag, Pd, Pt and highly toxic Pb electrodes, which face problems such as expensive raw materials, high overpotential, and low Faradaic efficiency.

Method used

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  • A composite material with electrocatalytic carbon dioxide reduction performance, preparation method and application thereof
  • A composite material with electrocatalytic carbon dioxide reduction performance, preparation method and application thereof
  • A composite material with electrocatalytic carbon dioxide reduction performance, preparation method and application thereof

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Embodiment 1

[0040] A cobalt-carbon composite material of the present invention, the cobalt-carbon composite material has a three-dimensional network structure. Humic acid-phenolic resin foam is used as a three-dimensional porous carbon support, and cobalt ions are adsorbed on the three-dimensional porous carbon support, and then Co-C active catalytic sites are formed by high-temperature heat treatment in a reducing atmosphere.

[0041] The preparation method of this cobalt-carbon composite material is as follows:

[0042] (1) Preparation of phenolic resin foam

[0043] With phenol, 37% formaldehyde aqueous solution and humic acid as raw material, be 20% sodium hydroxide aqueous solution as catalyst with mass fraction, add phenol in the four-necked flask that agitator, reflux condenser and thermometer are housed (heating and melting in advance ), humic acid and 37% formaldehyde aqueous solution, add sodium hydroxide aqueous solution under stirring, heat up to 90 ° C, react for 2-3 hours, ...

Embodiment 2

[0060] A cobalt-carbon-oxygen composite material of the present invention, the cobalt-carbon-oxygen composite material has a three-dimensional network structure. Using humic acid-phenolic resin foam as a three-dimensional porous carbon support, cobalt ions are adsorbed on the three-dimensional porous carbon support, and then the Co-C active catalytic center is formed by high-temperature heat treatment in a reducing atmosphere, and then reacted with oxygen at high temperature to incorporate oxygen. atoms, forming Co-C-O active catalytic sites.

[0061] The preparation method of the cobalt-carbon-oxygen composite material is as follows:

[0062] (1) Preparation of phenolic resin foam

[0063] With phenol, 37% formaldehyde aqueous solution and humic acid as raw material, be that 20% sodium hydroxide aqueous solution is made catalyst with mass fraction, add phenol in the four-necked flask that stirrer, reflux condenser and thermometer are housed (heating and melting in advance )...

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Abstract

The invention discloses a composite material with electrocatalytic carbon dioxide reduction performance, a preparation method and an application thereof. Wherein, the composite material is a three-dimensional network structure, including a three-dimensional porous carbon support, and cobalt elements are loaded on the three-dimensional porous carbon support to form a cobalt-carbon active catalytic center, or cobalt is loaded on the three-dimensional porous carbon support. element and oxygen, forming a cobalt-carbon-oxygen active catalytic center. The cobalt-carbon active catalytic center is formed by humic acid-phenolic resin foam and water-soluble cobalt salt through hydrothermal reaction and then heat treatment, and the cobalt-carbon-oxygen active catalytic center is formed by humic acid-phenolic resin foam and water-soluble cobalt The salt is formed by hydrothermal reaction and heat treatment, and then reacts with oxygen. The composite material has good stability, good electrochemical performance, low production cost and is suitable for large-scale preparation.

Description

technical field [0001] The invention relates to the technical field of electrochemistry and carbon dioxide electrocatalytic reduction, in particular to a composite material with the performance of electrocatalytic reduction of carbon dioxide and its preparation method and application. Background technique [0002] After the industrial revolution in the 19th century, fossil fuels (such as coal, oil, and natural gas) were developed by us as the main energy source for maintaining human social and economic development. The uncontrolled use of fossil fuels has brought us a series of problems. On the one hand, with the rapid economic development and rapid population increase, the global demand for energy continues to grow. However, fossil fuels are non-renewable energy sources, and the number is quite limited, so the energy crisis is becoming more and more serious. On the other hand, the use of large amounts of fossil fuels makes atmospheric CO 2 The gas builds up year after yea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/20B01J27/22H01M4/90C25B3/04C25B11/06C25B3/25
CPCH01M4/9041C25B11/04B01J27/20B01J27/22B01J35/0033B01J35/026C25B3/25Y02E60/50
Inventor 张翼吴慧琼武荣兰刘杰
Owner CENT SOUTH UNIV
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