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A preparation method of carbon nanotube film, functionalized carbon nanotube film and its application in electrocatalytic hydrogen production

A technology of carbon nanotube film and functionalization, which is applied in the direction of carbon compounds, chemical instruments and methods, electrodes, etc., can solve the problems of high price and achieve the effects of avoiding waste, realizing atom economy and excellent stability

Active Publication Date: 2022-05-13
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, noble metal electrocatalysts such as Pt have the highest activity, but are expensive; therefore, finding cheap and efficient electrocatalysts that can replace noble metals has become a current research hotspot.

Method used

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  • A preparation method of carbon nanotube film, functionalized carbon nanotube film and its application in electrocatalytic hydrogen production
  • A preparation method of carbon nanotube film, functionalized carbon nanotube film and its application in electrocatalytic hydrogen production
  • A preparation method of carbon nanotube film, functionalized carbon nanotube film and its application in electrocatalytic hydrogen production

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preparation example Construction

[0029] The invention provides a method for preparing a carbon nanotube film, comprising the following steps:

[0030] Using ferrocene and sulfur powder with a mass ratio of (90-95): 1 as a catalyst, the catalyst is first heated to a temperature of 95-100°C, and then methane gas is used as a raw material gas, in an argon atmosphere, the Under the action of the catalyst, the temperature is raised to 1000-1100° C. for reaction deposition for a certain period of time, and the crude carbon nanotube film containing iron is obtained by peeling off.

[0031] Based on some problems in the current preparation methods of carbon-based electrocatalysts, the present invention first synthesizes a crude carbon nanotube film, and then functionalizes it, which is expected to obtain a cheap and flexible electrocatalytic film for industrial large-scale hydrogen production .

[0032] The preparation of carbon nanotubes by chemical vapor deposition (CVD) is a method of catalytically decomposing ca...

Embodiment 1

[0051] a. First prepare the catalyst for carbon tubes: mix ferrocene and high-purity sulfur powder evenly at a mass ratio of 93:1, and grind them in a mortar for 30 minutes. Then prepare the carbon nanotube film:

[0052] Using a double-layer quartz tube, weigh an appropriate amount of the catalyst obtained above and put it on the front end of the quartz tube, then purge it with argon for 15 minutes, and start the temperature program at a rate of 35°C / min. When the programmed temperature reaches 1050°C, start heating the catalyst part at the front end of the quartz tube and keep the temperature at 100°C. When the temperature program raises the temperature of the quartz tube to 1100°C and the catalyst heating temperature is also stable to 100°C, start to feed high-purity CH 4 Gas (4.5 sccm). At this temperature, continue to pass CH 4 After the gas was maintained for 2 hours, the methane gas was turned off, but the Ar gas atmosphere was maintained by continuously feeding the ...

Embodiment 2

[0063] This embodiment is different from Example 1 in that: the NaH 2 PO 2 ·H 2 O quality is changed into 1.25g; Others are identical with embodiment 1.

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Abstract

The present invention relates to the green synthesis and application field of new composite materials (hydrogen catalysts). The present invention provides a preparation method of carbon nanotube film, functionalized carbon nanotube film and its application in electrocatalytic hydrogen production. The invention first utilizes an improved CVD method to obtain iron-containing rough carbon nanotube film. Under the guidance of the concept of green chemistry, the present invention adopts an atom-economic direct one-step P conversion method to in situ convert the iron remaining in the crude single-walled carbon nanotubes, and obtain a P‑rSWCNT electrocatalytic film with uniform morphology. Under neutral conditions at more than 120mA / cm 2 The performance of continuous electrolysis for more than 8 days remains almost unchanged at a high current density, showing super excellent electrocatalytic hydrogen production performance. In addition, the present invention successfully applies it to solar cell-driven electrocatalytic cracking of lake water, showing great industrial application prospects.

Description

technical field [0001] The present invention relates to the technical field of green synthesis of new composite materials (hydrogen catalyst) and its application design (green synthesis of functional materials, photoelectric catalysis, energy conversion, storage, photoelectrochemistry of functional composite materials, flexible electronics industry, environment, etc.), Specifically, it relates to a preparation method of a carbon nanotube film, a functionalized carbon nanotube film and its application in electrocatalytic hydrogen production. Background technique [0002] h 2 It is considered to be the ultimate solution to the energy crisis, "How to achieve the unification of large-scale, low energy consumption, and high stability in the large-scale production of hydrogen from renewable energy by electrolysis of water?" It is one of the major scientific issues and engineering technical problems. Forced by the importance of fresh water resources to life, industrial electrolyz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/162C01B32/174C25B11/065C25B1/04
CPCC01B32/162C01B32/174C25B1/04Y02E60/36
Inventor 曹登丰圣蓓蓓陈双明宋礼
Owner UNIV OF SCI & TECH OF CHINA
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