Multiwalled carbon nanotube-loaded PtCo catalyst based on deep eutectic solvent, and preparation method and application of catalyst

A technology of multi-walled carbon nanotubes and deep eutectic solvents, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the large-scale preparation and commercialization of catalysts In order to achieve the effects of improving dispersion and electrochemical active surface area, enhancing charge transfer interaction, and operating under mild operating conditions

Inactive Publication Date: 2015-05-13
GUANGXI NORMAL UNIV
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  • Claims
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Problems solved by technology

However, the preparation of fuel cell catalysts in DES reported in the above literature is limited to electrochemical methods, which will limit the large-scale preparation and commercial application of catalysts.
There are no literature and patent reports on the preparation of Pt-based catalysts by chemical reduction methods using DES as the medium and their application in direct methanol fuel cells.

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  • Multiwalled carbon nanotube-loaded PtCo catalyst based on deep eutectic solvent, and preparation method and application of catalyst
  • Multiwalled carbon nanotube-loaded PtCo catalyst based on deep eutectic solvent, and preparation method and application of catalyst
  • Multiwalled carbon nanotube-loaded PtCo catalyst based on deep eutectic solvent, and preparation method and application of catalyst

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Embodiment

[0016] Reference figure 1 , Using choline chloride / ethylene glycol DES as the medium to prepare MWCNTs-supported PtCo catalyst, the specific process is carried out in two steps: (1) Add 100 mg of ethanol to 100 mL of a mixed solvent with a volume ratio of ethanol / water = 1 / 1 Concentrated HNO 3 Acidified MWCNTs, ultrasonically dispersed for 30 min, add 20 mL 7.14 mg mL dropwise under magnetic stirring -1 Co(NO 3 ) 2 Solution, and then add 10 mL 0.1 M NaOH solution (containing 0.5 mg NaBH 4 After stirring for 30 minutes at room temperature, transfer the system to an oil bath and continue stirring. After raising the temperature to 120°C, add 10 mL of 50% hydrazine hydrate solution dropwise, and stir at reflux for 10 hours. The product is centrifuged, washed and After vacuum drying, a Co / MWCNTs composite material was obtained. (2) Add 10 mg of the Co / MWCNTs composite prepared above into 20 mL choline chloride / ethylene glycol DES, and add 100~700 μL 19.3 mM H dropwise after ultrasoni...

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Abstract

The invention discloses a multiwalled carbon nanotube-loaded PtCo catalyst based on a deep eutectic solvent and a preparation method and application of the catalyst, and relates to a simple and novel method for preparing an anode electrocatalyst for a direct formic acid fuel cell. According to the method, by taking a deep eutectic solvent as a medium, the catalyst is prepared by using a chemical reduction method. The preparation method of the catalyst is simple in process and mild and environmentally friendly in operating condition. The charge transfer interaction among components in a composite material catalyst can be obviously enhanced by using a deep eutectic solvent system, the dispersity of noble metals is improved, and the electrochemical activity surface area of the noble metals is improved, so that the electrocatalytic activity and stability of the catalyst on formic acid oxidation are hugely improved and the catalyst has the excellent anti-CO poisoning capacity.

Description

technical field [0001] The invention relates to the fields of electrocatalysis and fuel cells, in particular to a deep eutectic solvent-based multi-walled carbon nanotube-loaded PtCo catalyst, a preparation method thereof, and an application in direct methanol fuel cells. Background technique [0002] Deep eutectic solvents (DES) have unique physical and chemical properties such as low vapor pressure, non-toxicity, biodegradability, excellent solubility and conductivity, and wide electrochemical stability window, making them a promising green Solvents are widely used in the field of functional nanomaterial synthesis. At present, there are not many research literature reports on the preparation of fuel cell catalysts using deep eutectic solvent as the medium, and only a few literature reports are involved in the following: (1) In 2012, "Journal of Physical Chemistry C" reported a DES-based A novel method for the synthesis of high-surface-energy Pt nanocrystals by dielectric ...

Claims

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Application Information

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IPC IPC(8): B01J23/89H01M4/90
CPCY02E60/50
Inventor 樊友军孙胜男武丽娜王莉
Owner GUANGXI NORMAL UNIV
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