Multiwalled carbon nanotube-loaded PdSn 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 large-scale preparation and commercialization of catalysts To achieve the effect of increasing the electrochemical active surface area, enhancing the charge transfer interaction, and reducing the size of the chemical application limitations

Active Publication Date: 2015-05-13
GUANGXI NORMAL UNIV
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  • Abstract
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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

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

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Embodiment

[0019] refer to figure 1 , using choline chloride / urea DES as the medium to prepare multi-walled carbon nanotubes (MWCNTs) supported PdSn catalyst, the specific process is as follows: add 10 mg concentrated H to 20 mL choline chloride / urea DES 2 SO 4 or HNO 3 Acidified MWCNTs were ultrasonically dispersed for 2 h, and 56.4 mM PdCl with a mass ratio of PdSn / MWCNTs = 1 / 4 was added 2 and 42.1 mM SnCl 2 DES solution, control the mass ratio of Pd / Sn added to Pd / Sn = 1 / 0.1~1, add 100 mg NaBH after magnetic stirring for 1 h 4 solid, continue to stir for 10 min, then transfer the resulting suspension into a 25 mL reactor, and react at 80-200 °C for 12 h. After the reaction product is centrifuged, washed and vacuum-dried, the MWCNTs-supported PdSn catalyst is obtained.

[0020] XRD analysis showed that the size of Pd nanoparticles in this catalyst was significantly reduced, and its average size was 2.3 nm, which was significantly smaller than that in the Pd-supported MWCNTs catalys...

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Abstract

The invention discloses a multiwalled carbon nanotube-loaded PdSn 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 dimension of catalyzing nano-particles can be obviously reduced by using a deep eutectic solvent system, so that the metal nanoparticles grow along the surface of a carbon nano tube and are agglomerated to form a special chain-like cluster structure, the electrochemical activity surface area of noble metals is increased, and moreover, the charge transfer interaction among the components in a composite material catalyst is further enhanced. Therefore, 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 PdSn catalyst, a preparation method thereof, and an application in direct formic acid 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 dielectr...

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Application Information

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IPC IPC(8): B01J23/62H01M4/90
CPCY02E60/50
Inventor 樊友军梁芝熔王睿翔
Owner GUANGXI NORMAL UNIV
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