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Preparation method and application of platinum-carbon quantum dot/multi-walled carbon nanotube composite material

A technology of multi-walled carbon nanotubes and carbon quantum dots, which is applied in the field of electrocatalytic materials, can solve problems such as complex, time-consuming preparation process, and limit the application of composite materials, and achieve the effect of simple synthesis process

Pending Publication Date: 2020-11-10
山西师范大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is worth noting that for the synthesis of Pt, CQDs supported catalysts, Pt compound precursors (such as H 2 PtCl 6 ·6H 2 Co-reduction of O) and pre-preparation of CQDs, the complex and time-consuming preparation process severely limits the application of this composite.

Method used

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  • Preparation method and application of platinum-carbon quantum dot/multi-walled carbon nanotube composite material
  • Preparation method and application of platinum-carbon quantum dot/multi-walled carbon nanotube composite material
  • Preparation method and application of platinum-carbon quantum dot/multi-walled carbon nanotube composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The specific preparation steps of 1#Pt-CQDs / NWCNT composites are as follows:

[0063] (1) Two platinum wire electrodes were immersed in propylene carbonate (PC) solution together with tetrabutylammonium tetrafluoroborate (0.1M) and a voltage of 30V was applied for 12h.

[0064] (2) 30 mg of multi-walled carbon nanotubes (MWCNTs) were put into the electrolyte solution in (1) above and stirred for 12 hours.

[0065] (3) Transfer the solution obtained in step (2) to a polytetrafluoroethylene cup with a volume of 80mL, then put the polytetrafluoroethylene cup into a stainless steel autoclave, seal the autoclave, and ventilate the autoclave Pass the flow of Ar into the autoclave for 0.5 hours, remove the air in the solution, and close the vent after removing the air;

[0066] (4) Place the above-mentioned airtight autoclave at 160° C. and react by solvothermal process for 12 hours;

[0067] (5) Filter the sample treated in (4), and use propylene carbonate (PC) solution suc...

Embodiment 2

[0071] The specific preparation steps of 2#Pt-CQDs / NWCNT composites are as follows:

[0072] (1) Dip two platinum wire electrodes into the propylene carbonate (PC) solution together with tetrabutylammonium tetrafluoroborate (0.1M) and apply a voltage of 20V for 12h;

[0073] (2) putting 30mg of multi-walled carbon nanotubes (MWCNT) into the electrolyte solution in the above (1) and stirring for 12 hours;

[0074] (3) Transfer the solution obtained in step (2) to a polytetrafluoroethylene cup with a volume of 80mL, then put the polytetrafluoroethylene cup into a stainless steel autoclave, seal the autoclave, and ventilate the autoclave Pass the flow of Ar into the autoclave for 0.5 hours, remove the air in the solution, and close the vent after removing the air;

[0075] (4) Place the above-mentioned airtight autoclave at 160° C. and react by solvothermal process for 12 hours;

[0076](4) Solvothermal process was adopted to process the solution for 12 hours at a speed of 500 ...

Embodiment 3

[0081] The specific preparation steps of 3#Pt-CQDs / NWCNT composites are as follows:

[0082] (1) Dip two platinum wire electrodes into the propylene carbonate (PC) solution together with tetrabutylammonium tetrafluoroborate (0.1M) and apply a voltage of 10V for 12h;

[0083] (2) putting 30mg of multi-walled carbon nanotubes (MWCNT) into the electrolyte solution in the above (1) and stirring for 12 hours;

[0084] (3) Transfer the solution obtained in step (2) to a polytetrafluoroethylene cup with a volume of 80mL, then put the polytetrafluoroethylene cup into a stainless steel autoclave, seal the autoclave, and ventilate the autoclave Pass the flow of Ar into the autoclave for 0.5 hours, remove the air in the solution, and close the vent after removing the air;

[0085] (4) Place the above-mentioned airtight autoclave at 160° C. and react by solvothermal process for 12 hours;

[0086] (5) Filter the sample treated in step (4), and use propylene carbonate (PC) solution for su...

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Abstract

The invention provides a preparation method and application of a platinum-carbon quantum dot / multi-walled carbon nanotube composite material. According to the method, platinum nanoparticles (Pt NP) and carbon quantum dots (CQDs) are prepared in situ under the auxiliary action of an electric field, and the Pt NP and the CQDs are subjected to subsequent thermal adjustment in the process of loading the Pt NP and the tetrabutylammonium hydroxide (TBAOH) by controlling electrolytic voltages (30V, 20V, 10V and 5V) and electrolytes (tetrabutylammonium tetrafluoroborate (TBABF4), tetrafluoride (TBACF3SO3)) and tetrabutylammonium fluoride). Thus, the Pt-CQDs / MWCNT composite catalyst is obtained. The adopted synthesis process is simple, in-situ synthesis is adopted, the prepared platinum-carbon quantum dot / multi-walled nanotube composite material is an electrocatalyst, and the mass activity of a hydrogen evolution reaction (HER) and an ethanol oxidation reaction (EOR) of a PtCQDs / MWCNT catalystis 14.8 times higher than that of commercially available Pt / C (the overpotential is -40 mV) and 5.6 times higher than that of a front peak.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, in particular to a preparation method and application of a platinum-carbon quantum dot / multi-wall carbon nanotube composite material (Pt-CQDs / MWCNT). Background technique [0002] As an important half-reaction of water splitting, the electrocatalytic hydrogen evolution reaction (HER) provides a sustainable and clean energy production method for replacing fossil fuels in the future. Due to the slow kinetic process of HER on electrodes, there is an urgent need to develop efficient catalysts to accelerate electrochemical reactions for large-scale hydrogen production. Furthermore, direct ethanol fuel cells (DEFCs) have attracted worldwide attention for the use of electrochemical power generation methods in portable electronic devices due to their high energy density, low pollutant emissions, low operating temperature, and ease of operation. Platinum-based materials have been shown to be the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J21/18B01J37/34B01J37/10C25B11/08C25B1/04C25B3/02
CPCB01J23/42B01J21/185B01J37/348B01J37/10C25B1/04B01J35/393B01J35/23B01J35/33Y02E60/36
Inventor 肖何薛首峰赵曼贾建峰
Owner 山西师范大学
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