Carbon-containing nickel-cladded single-walled carbon nanotube composite, and preparation method and application thereof

A technology for single-walled carbon nanotubes and composite materials, which is applied in the field of carbon-containing nickel-coated single-walled carbon nanotube composite materials and their preparation, can solve the problems of complex synthesis and purification, cumbersome processes, unfavorable promotion, etc. , Improve the active area, the effect of simple and easy operation

Active Publication Date: 2018-06-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the methods for preparing these materials usually involve complex synthesis and purification processes, which are not only cumbersome and time-consuming, but are not conducive to the promotion of large-scale industrialization

Method used

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  • Carbon-containing nickel-cladded single-walled carbon nanotube composite, and preparation method and application thereof
  • Carbon-containing nickel-cladded single-walled carbon nanotube composite, and preparation method and application thereof
  • Carbon-containing nickel-cladded single-walled carbon nanotube composite, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Preparation of carbon-containing nickel-coated single-walled carbon nanotube composites:

[0035] Mix graphite powder (purity 99%), catalyst yttrium-nickel alloy powder and accelerator ferrous sulfide powder in a certain proportion, and press it into a rod with a diameter of 6mm, and then fix one end of it in the sealed DC arc discharge chamber. The anode is used as an anode graphite rod; wherein, the nickel element is 4.0 at% relative to the total atomic percentage of graphite, and the sulfur element is 1 at% relative to the total atomic percentage of graphite. Fix one end of another pure graphite rod with a diameter of 8mm to the cathode of the DC arc discharge chamber, keeping the two ends of the two graphite rods facing each other horizontally. The DC arc discharge chamber was evacuated and filled with high-purity helium to keep the initial pressure of the helium atmosphere at 0.7 bar. Then maintain a DC discharge current of 80A for discharge and arc start. Duri...

Embodiment 2

[0042]The difference between embodiment 2 and embodiment 1 is that in the anode graphite rod, the atomic percentage of nickel element relative to graphite is 8 at%, the atomic percentage of sulfur element relative to graphite is 1 at%, the initial voltage of helium atmosphere is adjusted to 0.5 bar, and the discharge The current was maintained at 60A; the entire discharge process was about 10 minutes, and the discharge chamber obtained a black solid substance in the form of a network, which was the prepared carbon-containing nickel-coated single-walled carbon nanotube composite material, wherein the nickel metal content was about 40wt%.

[0043] Figure 4 Transmission electron micrograph of the carbon-containing nickel-coated single-walled carbon nanotube composite prepared in Example 2.

Embodiment 3

[0045] The difference between embodiment 3 and embodiment 1 is that the catalyst in the anode graphite rod is changed to nickel powder, the accelerator is changed to nickel sulfide powder, the atomic percentage of nickel element relative to graphite is 2at%, and the atomic percentage of sulfur element relative to graphite is 1at%. , the initial voltage of the helium atmosphere was adjusted to 1 bar, and the discharge current was maintained at 60A; the entire discharge process was about 10 minutes, and the discharge chamber also obtained a net-like black solid, wherein the content of nickel metal was about 9.5wt%.

[0046] Figure 5 Transmission electron micrograph of the carbon-containing nickel-coated single-walled carbon nanotube composite prepared in Example 3.

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Abstract

The invention belongs to the field of energy catalytic materials and particularly relates to a carbon-containing nickel-cladded single-walled carbon nanotube composite, and a preparation method and application thereof. An electrolysis water catalyst for the carbon-containing nickel-cladded single-walled carbon nanotube composite is prepared by one-step synthesis through a DC arc method. The wholeprocess is easy and convenient to operate and easy to carry out. Graphite, nickel metal and alloy are used as main raw materials. The electrolysis water catalyst is low in cost and beneficial to large-scale preparation. The prepared electrolysis water catalyst has a natural porous net structure with single-walled carbon nanotubes serving as a network framework. The electrolysis water catalyst is good in electric conductivity and quite beneficial to electronic transmission and gas precipitation in the electrolysis water reaction process. The composite as the electrolysis water anode catalyst has more excellent catalytic activity than an iridium oxide catalyst commonly used in the industry and also has the hydrogen evolution catalytic activity.

Description

technical field [0001] The invention belongs to the field of energy catalytic materials, in particular to a carbon-containing nickel-coated single-walled carbon nanotube composite material and its preparation method and application. Background technique [0002] Energy shortage is a challenge faced by the sustainable development of human society. The electrolysis of water to produce oxygen and hydrogen is an effective way to solve the problem of energy shortage. However, in the process of electrocatalytic water splitting, the kinetic process of electrocatalytic oxygen evolution reaction is much slower than that of hydrogen evolution reaction, which seriously hinders the improvement of water electrolysis efficiency. Therefore, the development of efficient oxygen evolution catalysts for water electrolysis is the key to improving the efficiency of water electrolysis. At present, iridium dioxide, ruthenium dioxide or platinum dioxide, which are commonly used in the industry fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C25B1/04C25B11/051C25B11/091Y02E60/36
Inventor 吴初新官轮辉张建硕
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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