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Porous dandelion-shaped Pd nanometer dendrite preparation method, material obtained with same, and application

A dandelion-like nano-technology, which is applied in nanotechnology, transportation and packaging, metal processing equipment, etc., can solve problems such as technical limitations and complex synthetic routes, and achieve a clear mechanism of the preparation process, a simple preparation method, and large-scale production. Effect

Active Publication Date: 2018-09-18
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain technical limitations in the preparation of hollow nanostructures in noble metal-based alloys by displacement reactions.
At the same time, the synthesis route of the sacrificial template method is relatively complicated, and the construction of porous structures using a more convenient method still needs further exploration

Method used

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  • Porous dandelion-shaped Pd nanometer dendrite preparation method, material obtained with same, and application
  • Porous dandelion-shaped Pd nanometer dendrite preparation method, material obtained with same, and application
  • Porous dandelion-shaped Pd nanometer dendrite preparation method, material obtained with same, and application

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Embodiment 1

[0029] A preparation method of porous dandelion-like Pd nano dendrites, comprising the following steps:

[0030] 1) Preparation of reaction solution: Accurately weigh 0.038mg N,N'-methylenebisacrylamide (MBAA), add 9.5mL H 2 O, make it fully dissolved, add 0.5mL 0.05M K 2 PdCl 4 Solution, fully ultrasonicated to make it evenly mixed.

[0031] 2) Preparation of porous dandelion-like Pd nanodendrites: the reaction solution was allowed to stand at room temperature (25°C) for 10 min to obtain a black precipitate. The black precipitate is centrifuged, washed, and dried to obtain the porous dandelion-like Pd nanodendrite.

Embodiment 2

[0033] A preparation method of porous dandelion-like Pd nano dendrites, comprising the following steps:

[0034] 1) Preparation of reaction solution: Accurately weigh 50 mg of N, N'-methylenebisacrylamide (MBAA), add 9.5 mL of H 2 O, make it fully dissolved, add 0.5mL 0.05M K 2 PdCl 4 Solution, fully ultrasonicated to make it evenly mixed.

[0035] 2) Preparation of porous dandelion-like Pd nanodendrites: the reaction solution was allowed to stand at room temperature (25°C) for 10 min to obtain a black precipitate. The black precipitate is centrifuged, washed, and dried to obtain the porous dandelion-like Pd nanodendrite.

Embodiment 3

[0037] A preparation method of porous dandelion-like Pd nano dendrites, comprising the following steps:

[0038] 1) Preparation of reaction solution: Accurately weigh 385.43 mg N, N'-methylenebisacrylamide (MBAA), add 9.5 mL H 2 O, make it fully dissolved, add 0.5mL 0.05M K 2 PdCl 4 Solution, fully ultrasonicated to make it evenly mixed.

[0039] 2) Preparation of porous dandelion-like Pd nanodendrites: the reaction solution was allowed to stand at room temperature (25°C) for 10 min to obtain a black precipitate. The black precipitate is centrifuged, washed, and dried to obtain the porous dandelion-like Pd nanodendrite.

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Abstract

The invention discloses a porous dandelion-shaped Pd nanometer dendrite preparation method, a material obtained with the porous dandelion-shaped Pd nanometer dendrite preparation method, and the application using the material as an oxygen reduction cathode catalyst. According to the porous dandelion-shaped Pd nanometer dendrite preparation method, N,N'-methylene bisacrylamide (MBAA) is used as a complexing agent, a structure-directing agent and a reducing agent, and metal precursors are quickly reduced into porous dandelion-shaped Pd nanometer dendrites by adopting a standing reduction methodin one step. The porous dandelion-shaped Pd nanometer dendrites obtained with the method have the advantages of being regular in morphology, ultrafine in grain size, high in electrocatalytic activityand the like, and show high catalytic activity and stability when serving as the oxygen reduction cathode catalyst. The porous dandelion-shaped Pd nanometer dendrite preparation method is simple, efficient and universal.

Description

technical field [0001] The invention relates to a method for preparing porous dandelion-like Pd nano dendrites and the obtained materials and applications thereof, belonging to the technical field of Pd nano dendrites. Background technique [0002] Facing the problems of energy shortage and environmental pollution, a large number of scientific researchers are devoted to the development and development of clean energy technology. Unlike other energy conversion devices, fuel cells can directly convert chemical energy into electrical energy, and have the advantages of no pollution, zero emissions, high efficiency, wide application, and diversified fuels. It is expected to become the most potential energy supply device in the future. However, there are still some urgent problems to be solved on the road to commercialization of fuel cells, the most prominent of which is the design and synthesis of low-platinum or non-platinum electrocatalysts with high catalytic activity and good...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y40/00
CPCB82Y40/00B22F9/24B22F2009/245B22F1/0553B22F1/07B22F1/054
Inventor 唐亚文江娴黄祯娜邓思辉孙境泽付更涛徐林孙冬梅
Owner NANJING NORMAL UNIVERSITY
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