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Multivalent copper nano-material, preparation method thereof and application of multivalent copper nano-material as electrocatalyst in carbon capture technology

A copper nanometer and multivalent state technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems that hinder the industrialization process of resource utilization, the selectivity of reduction products is not high, and the range of catalysts is limited, so as to achieve good conversion effect, Suitable for popularization and application, the effect of simple method

Pending Publication Date: 2021-12-31
王荔 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Often not very selective for specific reduction products, especially complex reduction products
(4) There are side reactions
This pair of contradictory factors greatly limits the range of optional catalysts. Among many metals, the surface of Cu has a moderate affinity for CO, so most of the catalysts that can catalyze CO coupling are Cu-based catalysts.
Polycrystalline Cu, as the only one experimentally confirmed so far to be able to efficiently catalyze CO 2 Metals that are reduced to hydrocarbons still face problems such as easy deactivation, poor selectivity, and large overpotential, which hinder CO 2 Industrialization Process of Resource Utilization

Method used

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  • Multivalent copper nano-material, preparation method thereof and application of multivalent copper nano-material as electrocatalyst in carbon capture technology
  • Multivalent copper nano-material, preparation method thereof and application of multivalent copper nano-material as electrocatalyst in carbon capture technology
  • Multivalent copper nano-material, preparation method thereof and application of multivalent copper nano-material as electrocatalyst in carbon capture technology

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Effect test

Embodiment 1

[0036] This embodiment provides the activation treatment steps of activated carbon, specifically: select Valcan XC-72 Carbon as the carrier, place the activated carbon in a suitable glass reaction vessel, and add 50wt% HNO 3 The solution was heated and stirred at 90° C. for 3 hours, then washed with water, dried, and passed through a 200-mesh sieve for later use. The purpose is to change the internal structure of the carbonized material, expand the specific surface area, increase the specific surface area of ​​the activated carbon material and modify the surface structure, and finally improve the adsorption performance of the activated carbon material.

Embodiment 2

[0038] This embodiment provides a method for preparing multivalent copper nanomaterials, using sodium borohydride reduction, comprising the following steps:

[0039] Step S1: Take a dilute copper chloride solution with a molar concentration of 1mol / L, and add a complexing agent ethylenediaminetetraacetic acid (EDTA) with a concentration of 1mol / L to complex CuCl 2 Solution, forming the complex of copper salt precursor;

[0040] Step S2: Add the activated carbon pre-treated in Example 1 to the complex obtained in the step S1, the carbon load can be 10%, add 10mL high-purity water, mix well, then add 5mL stabilizer ammonia water and mix well;

[0041] Step S3: Add 10 mL of sodium borohydride solution dropwise to the product obtained in step S2 using a peristaltic pump or a flow injector. The ratio of the concentration of the sodium borohydride solution to the concentration of the reactants is 1:10, and the reduction is carried out in an ice-water bath React for 1 hour. After th...

Embodiment 3

[0044] The polyvalent copper nanomaterial prepared in Example 2 is used for electrocatalysis of CO 2 . Figure 5 It is a schematic structural diagram of the H-type electrolytic cell used in Example 3 of the present application. see Figure 5 , this embodiment adopts the laboratory self-constructed CO 2 Captured reaction system device, H-type electrolytic cell. The H-type electrolytic cell includes an anode chamber and a cathode chamber, and the tops of the anode chamber and the cathode chamber are provided with polytetrafluoroethylene covers with gas inlets and gas outlets to ensure airtightness. The anode chamber and the cathode chamber are separated by a proton exchange membrane, ions can pass through freely, but molecules cannot pass through, and KHCO is added to both the anode chamber and the cathode chamber 3 Electrolyte solution, the working electrode and the reference electrode are placed in the cathode chamber, the counter electrode is placed in the anode chamber, ...

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Abstract

The invention discloses a multivalent copper nano-material, a preparation method thereof and application of the multivalent copper nano-material as an electrocatalyst in a carbon capture technology. The preparation method comprises the following steps of: taking a dilute solution of copper salt, and adding a complexing agent to form a complex of a copper salt precursor; adding activated carbon, adding high-purity water, performing fully and uniformly mixing, and then adding a stabilizer; and adding a sodium borohydride solution drop by drop, carrying out reduction and ice-water bath reaction, and after the reaction is completed, washing and drying to obtain the multivalent copper nano-material. When the multivalent copper alloy nano-material is used as an electrocatalyst for a carbon dioxide capture reaction, the conversion effect is good, the methanol conversion efficiency is high, conversion can be completed under the conditions of a water phase, normal temperature and normal pressure, and the multivalent copper alloy nano-material has very high practical application value; and the multivalent copper alloy catalyst can selectively reduce carbon dioxide into methanol, and the Faraday efficiency of the multivalent copper alloy catalyst can reach 75%.

Description

technical field [0001] The invention relates to a multivalent copper nanometer material, its preparation method and its application as an electrocatalyst in carbon capture technology. Background technique [0002] Since the industrial revolution, the main way for human beings to obtain energy is to burn fossil fuels, and the resulting excessive exhaust emissions have led to carbon dioxide (CO 2 ) content rose to about 410 ppm (parts per million, 2019), bringing a series of potential threats such as climate change and ocean acidification. [0003] Currently proposed techniques for artificial carbon fixation include thermocatalytic CO 2 Reduction, electrocatalysis of CO 2 Reduction, photocatalysis of CO 2 Reduction, etc., from the perspective of technical difficulty, maturity, and economy, thermocatalytic CO 2 Reduction usually requires maintaining high temperature and pressure, photocatalytic CO 2 The reduction principle usually requires a photosensitizer or even an elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/054C25B11/091C25B3/03C25B3/07C25B3/26
CPCC25B11/054C25B11/091C25B3/07C25B3/03C25B3/26
Inventor 王荔杨雁泽
Owner 王荔
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