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Method for electrocatalytic reduction of CO2 by using nitrogen-doped carbon nanotubes with different curvatures

A technology of nitrogen-doped carbon and electrocatalysis, which is applied in nanotechnology, chemical instruments and methods, nanotechnology, etc. for materials and surface science, and can solve the problems of unexplored substrate material tube diameter curvature, catalytic performance, electronic properties and catalytic properties. issues of nature

Active Publication Date: 2021-08-13
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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  • Method for electrocatalytic reduction of CO2 by using nitrogen-doped carbon nanotubes with different curvatures
  • Method for electrocatalytic reduction of CO2 by using nitrogen-doped carbon nanotubes with different curvatures
  • Method for electrocatalytic reduction of CO2 by using nitrogen-doped carbon nanotubes with different curvatures

Examples

Experimental program
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Effect test

Embodiment 1

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

[0033] Step 1: Pretreating the multi-walled carbon nanotubes (CNTs): soaking in deionized water treatment, ultrasonic treatment for 20-30 minutes, removing impurities on the surface and drying; the diameter of the CNTs is 27±4nm;

[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, pretreatment at 500°C for 1h; then at 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 minutes to obtain a dispersion of M-NCNT-1000, and then take it out with a pipette 30μL of M-NCNT-1000 dispersion solution, dr...

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 a method for electrocatalytic reduction of CO2 by using nitrogen-doped carbon nanotubes with different curvatures, and belongs to the technical field of electrocatalytic reduction of CO2. The method comprises the following steps: step 1, pre-treating a multi-walled carbon nanotube, wherein the diameter of the CNT ranges from 27 nm to 65 nm; step 2, preparing a nitrogen-doped carbon nanotube, namely putting the CNT into a tubular furnace, and carrying out ammonia gas etching treatment to obtain NCNT; step 3, preparing an electrode material; and step 4, subjecting CO2 to electrocatalytic reduction, namely conducting electrocatalytic reduction on CO2 with the prepared electrode material as a working electrode. The catalyst is an element-doped carbon nano tube material, the performance of electrocatalytic reduction of carbon dioxide is adjusted by controlling the curvature of the carbon nano tube, and the optimal carbon tube size and the size confinement mechanism are summarized; and a certain guiding effect is provided for the selection of the size of a catalyst of a carbon nanotube-based material in the aspect of electrocatalytic reduction of carbon dioxide.

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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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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