A method for preparing concave cubic platinum-rare earth alloy nanocrystals based on a eutectic solvent

A technology of deep eutectic solvent and rare earth alloy, which is applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science. layer and other problems, to achieve excellent electrocatalytic performance and enhance the effect of poisoning ability

Inactive Publication Date: 2018-11-06
XUZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the relatively negative standard reduction potential of rare earth metals and the poor atomic ratio between platinum and rare earth metals, the alloys have sequential and delaminated phenomena during the reduction process, making it difficult to form ideal alloys.
Therefore, it is a great challenge to prepare a platinum-rare earth alloy nanocrystal catalyst with a high-index facet structure.

Method used

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  • A method for preparing concave cubic platinum-rare earth alloy nanocrystals based on a eutectic solvent
  • A method for preparing concave cubic platinum-rare earth alloy nanocrystals based on a eutectic solvent
  • A method for preparing concave cubic platinum-rare earth alloy nanocrystals based on a eutectic solvent

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Embodiment 1

[0026] In this embodiment, the preparation method of platinum-rare earth alloy nanocrystals based on deep eutectic solvent concave cubes is realized in the following steps:

[0027] (1) Preparation of urea-choline chloride-based deep eutectic solvent: Add urea and choline chloride into a round-bottomed flask with a molar ratio of 1:2, seal it, place it in a glycerin bath at 80°C, and wait to form a molten state Afterwards, it was stirred by magnetic force until it became a colorless liquid, and the choline chloride-urea group deep eutectic solvent was obtained, which was set aside.

[0028] (2) Preparation of alloy plating solution: weigh 485.99mg potassium hexachloroplatinate and 44.47mg samarium nitrate, and dissolve them in the deep eutectic solvent prepared by the step (1) of 100ml, be mixed with 10mM hexachloroplatinum Potassium chloride and 1 mM samarium nitrate in a choline chloride-ureido deep eutectic solvent solution.

[0029] (3) Preparation of glassy carbon electr...

Embodiment 2

[0034] In this embodiment, the preparation method of platinum-rare earth alloy nanocrystals based on deep eutectic solvent concave cubes is realized in the following steps:

[0035] "44.47mg samarium nitrate" used in step (2) in Example 1 was changed to "45.14mg gadolinium nitrate". The remaining steps in this embodiment are the same as those in Example 1, and concave cubic Pt-Gd alloy nanocrystals can be prepared.

Embodiment 3

[0037] In this embodiment, the preparation method of platinum-rare earth alloy nanocrystals based on deep eutectic solvent concave cubes is realized in the following steps:

[0038] "44.47mg samarium nitrate" used in step (2) in Example 1 was changed to "32.49mg lanthanum nitrate". The remaining steps in this embodiment are the same as those in Example 1, and concave cubic Pt—La alloy nanocrystals can be prepared.

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Abstract

A method for preparing concave cubic platinum-rare earth alloy nanocrystals based on a eutectic solvent is disclosed, and belongs to the technical field of fuel cell catalyst preparation. The eutecticsolvent which is novel, green and non-aqueous is adopted as a medium to prepare the concave cubic platinum-rare earth alloy nanocrystals with a surface of a {hk0} high-index crystal face structure byelectrochemical cyclic voltammetry without the need of any surfactant. The high-index crystal face has an open type surface structure so that a high number of active sites can be provided and catalyst performance can be significantly improved through a double-function mechanism of an alloyed surface electron structure, and therefore, the nanocrystals have excellent electrocatalytic performance for fuel molecules such as formic acid, methanol and ethanol, and have broad application prospects in the field of fuel cells, the field of electrosynthesis, and the like.

Description

technical field [0001] The invention relates to a platinum-based alloy nanocrystal catalyst and a preparation method thereof, belonging to the field of fuel cell catalysts, in particular to a preparation method of a concave cubic platinum-rare earth alloy nanocrystal catalyst with a high-index crystal plane structure and its application in a fuel cell field applications. Background technique [0002] Due to its high energy conversion efficiency, low environmental pollution, low noise, wide fuel range, flexible load regulation, high reliability and easy construction, fuel cells have attracted people's attention. The most important new energy technology". The key material in fuel cell components is the electrocatalyst, which has a direct impact on the performance, stability, and cost of the cell. At present, fuel cell catalysts are mainly platinum-based nanomaterials, and their performance is affected by the size of the catalyst (ie quantum effect), surface structure (ie sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92B82Y30/00
CPCB82Y30/00H01M4/8853H01M4/9041H01M4/921Y02E60/50
Inventor 韦露毛宇杰胡玉里赵新生聂新明魏永生
Owner XUZHOU NORMAL UNIVERSITY
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