A self-supporting nickel-oxygen co-doped carbon nanotube catalyst grown in situ and its preparation and application

A carbon nanotube, in-situ growth technology, applied in the field of electrochemistry, can solve the problems of high risk factor, a large amount of waste acid, increase process cost, etc., and achieve the effects of low energy consumption, uniform co-doping, and saving preparation process.

Active Publication Date: 2021-10-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the experiment, the oxidation reaction of carbon materials and strong oxidizing acids (such as nitric acid or sulfuric acid) is mainly used to obtain them under heating conditions. This operation process has a high risk factor and will produce a large amount of waste acid.
In addition, the carbon materials currently prepared are mainly powder samples, and the binder needs to be transferred to the conductive substrate during the test and actual application process, which will undoubtedly increase the process and cost.

Method used

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  • A self-supporting nickel-oxygen co-doped carbon nanotube catalyst grown in situ and its preparation and application
  • A self-supporting nickel-oxygen co-doped carbon nanotube catalyst grown in situ and its preparation and application
  • A self-supporting nickel-oxygen co-doped carbon nanotube catalyst grown in situ and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take a square nickel foam with a side length of 5 cm, wash it with 0.1M HCl solution and ultrapure water in order to remove the oxide layer and other impurities, and dry it at room temperature after washing. The dried nickel foam was calcined on an alcohol lamp (70% ethanol volume concentration) for 30 min to obtain a self-supporting nickel-oxygen co-doped carbon nanotube catalyst grown in situ.

[0030] figure 2 It is the topography figure of the self-supporting nickel-oxygen co-doped carbon nanotube catalyst obtained in this embodiment, wherein figure 2 (a) is the SEM picture, figure 2 (b) is a TEM image. It can be seen from the figure that the morphology of the obtained product is a three-dimensional network carbon nanotube structure.

[0031] image 3 It is the morphology and element distribution diagram of the self-supporting nickel-oxygen co-doped carbon nanotube catalyst obtained in this example, wherein image 3 (a) is the HRTEM map, image 3 (b) for ...

Embodiment 2

[0039] Take a square nickel foam with a side length of 10 cm, wash it successively with 0.1M HCl solution and ultrapure water to remove the oxide layer and other impurities, and dry it at room temperature after washing. The dried nickel foam was calcined on an alcohol lamp (80% ethanol volume concentration) for 40 min to obtain a self-supporting nickel-oxygen co-doped carbon nanotube catalyst grown in situ.

[0040] After characterization and testing, the catalyst obtained in this example also has a three-dimensional network carbon nanotube structure, and has excellent electrocatalytic H production 2 o 2 performance.

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Abstract

The invention discloses an in-situ-grown self-supporting nickel-oxygen co-doped carbon nanotube catalyst and its preparation and application. Nickel foam is used as a supporting electrode, and ethanol is used to burn insufficiently on the surface of nickel foam to make the foam nickel In-situ growth of nickel-oxygen co-doped carbon nanotube networks. The catalyst provided by the invention has the advantages of high hydrogen peroxide production, good stability, and simple preparation process, and is suitable for the field of hydrogen peroxide preparation.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an in-situ grown self-supporting nickel-oxygen co-doped carbon nanotube catalyst and a preparation method thereof. Background technique [0002] h 2 o 2 It is one of the 100 most important chemicals in the world and plays an important role in various industries such as paper making, pulp bleaching, chemical synthesis, sewage treatment and mining. 2024H 2 o 2 The production is estimated at 6 million tons, with a total value of up to $6.4 billion. The anthraquinone method is the production of H 2 o 2 The most general method, high construction cost and high pollution are the main disadvantages of this method, besides, operations such as storage, transfer and dilution are also dangerous and expensive. Preparation of H by electrochemical ORR method 2 o 2 It is a cost-effective and environmentally friendly method that has attracted much attention in recent years. Because there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J23/755B01J35/00B01J37/34C25B1/30C25B11/091
CPCB01J21/185B01J23/755B01J35/0033B01J37/349C25B1/30C25B11/04
Inventor 盛国平何磊
Owner UNIV OF SCI & TECH OF CHINA
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