An electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures 2 Methods

A technology of nitrogen-doped carbon and electrocatalysis, which is applied in nanotechnology, chemical instruments and methods, nanotechnology, etc. for materials and surface science. It can solve the influence of electronic properties and catalytic properties, and the curvature of the tube diameter of the substrate material has not been explored. Catalytic performance etc.

Active Publication Date: 2022-04-12
CHINA TEST & CERTIFICATION INT GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electronic properties of NCNT are strongly dependent on its own size, so a slight change in its size will have a greater impact on the electronic and catalytic properties of NCNT.
Carbon nanotubes are used as the substrate material of the catalyst in the electrocatalytic reduction of carbon dioxide, but the influence of the curvature of the tube diameter of the substrate material itself on the catalytic performance has not been explored in the prior art

Method used

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  • An electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures <sub>2</sub> Methods
  • An electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures <sub>2</sub> Methods
  • An electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures <sub>2</sub> Methods

Examples

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Embodiment 1

[0032] An electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures 2 methods, including:

[0033] Step 1: Pretreat the multi-walled carbon nanotubes (CNTs): soak in deionized water, ultrasonically treat for 20-30 minutes, remove impurities on the surface and dry; the diameter of the CNTs is 27±4 nm;

[0034] Step 2: Preparation of nitrogen-doped carbon nanotubes (NCNTs): put the CNTs treated in step 1 into a tube furnace at a heating rate of 3°C / min, pretreat at 500°C for 1h; then use the same heating rate , heated up to 1000°C, and treated with ammonia gas for 2 hours to obtain NCNT, denoted as M-NCNT-1000;

[0035] Step 3: Preparation of electrode material: Sonicate 5 mg of M-NCNT-1000 prepared in step 2 with 100 μL of water, 400 μL of ethanol and 75 μL of nafion aqueous solution for 30 min to obtain a dispersion of M-NCNT-1000, and then use a pipette gun Take out 30μL of M-NCNT-1000 dispersion liquid and drop it on the cut 1*3cm 2 ...

Embodiment 2

[0039] In this example, the diameter of the CNT is 46±5nm, and the prepared NCNT is recorded as L-NCNT-1000; other conditions are the same as in Example 1.

Embodiment 3

[0041] In this example, the diameter of the CNT is 65±5nm, and the prepared NCNT is recorded as L2-NCNT-1000; other conditions are the same as in Example 1.

[0042] In order to further illustrate the beneficial effects of the present invention, comparative examples are provided as follows.

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Abstract

The invention relates to an electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures 2 The method belongs to the electrocatalytic reduction of CO 2 technology field. The above method includes: step 1: pretreating multi-walled carbon nanotubes; the diameter of the CNT is 27nm-65nm; step 2: preparation of nitrogen-doped carbon nanotubes: putting the CNTs into a tube furnace, ammonia gas Etching treatment to obtain NCNT; Step 3: Preparation of electrode materials; Step 4: Electrocatalytic reduction of CO 2 : With the prepared electrode material as the working electrode, the CO 2 Perform electrocatalytic reduction. The catalysis of the present invention is element-doped carbon nanotube material, which adjusts the performance of electrocatalytic reduction of carbon dioxide by controlling the curvature of carbon nanotubes, and summarizes the optimal carbon The selection of catalyst size of nanotube-based materials in the electrocatalytic reduction of carbon dioxide provides some guidance.

Description

technical field [0001] The present invention relates to electrocatalytic reduction of CO 2 Technical field, specifically providing a method for electrocatalytic reduction of CO using nitrogen-doped carbon nanotubes with different curvatures 2 Methods. Background technique [0002] CO in the air 2 Mainly from the combustion of fossil fuels and vehicle exhaust emissions, with the CO 2 The continuous accumulation in the air will cause irreversible impact on the surrounding environment, such as causing the greenhouse effect and global warming. will CO 2 Converting to important fuels or chemicals is a very good way, which can not only realize energy conversion but also solve the problem of environmental pollution. This conversion idea has attracted widespread attention of scientists at home and abroad. [0003] Electrocatalytic reduction of carbon dioxide (CO 2 RR) is considered as an easy way to store renewable resources in chemical form. CO 2 RR has the following charac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091B01J27/24C25B1/23B82Y40/00B82Y30/00
CPCC25B1/00B01J27/24B82Y40/00B82Y30/00
Inventor 吕奎霖朱英万德田包亦望李海燕杨树林
Owner CHINA TEST & CERTIFICATION INT GRP CO LTD
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