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A method for synthesizing dodecahedral PTCU nanoframe materials by a template-free solvothermal method

A dodecahedron, solvothermal technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, can solve the problems of poor stability, slow reaction kinetics, high price of Pt catalysts, etc. Achieve the effect of improving catalytic activity and simple preparation method

Active Publication Date: 2020-11-03
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is well known that Pt nanomaterials are the most efficient catalysts in many important applications, but Pt catalysts are expensive, have slow reaction kinetics and poor stability

Method used

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  • A method for synthesizing dodecahedral PTCU nanoframe materials by a template-free solvothermal method
  • A method for synthesizing dodecahedral PTCU nanoframe materials by a template-free solvothermal method
  • A method for synthesizing dodecahedral PTCU nanoframe materials by a template-free solvothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Reagents and instruments

[0016] Cetyltrimethylammonium chloride, platinum acetylacetonate, copper chloride (CuCl 2 2H 2 O), ethanolamine, oleylamine, simethicone, ethanol, and cyclohexane were purchased from Shanghai Chemical Plant, and all reagents were of analytical grade. Scanning electron microscopy (SEM, JSM-6390LV, JEOL, Japan), transmission electron microscopy (TEM, JEM-2100, JEOL, Japan), accelerating voltage at 200 kV, chemical composition of PtCu DNFs material by energy dispersive spectroscopy (EDX, Oxford) , determined by X-ray diffraction (XRD).

[0017] Add the regulatory molecule cetyltrimethylammonium chloride (CTAC 25mM) into the solvent oleylamine (20mL) and mix evenly, stir and sonicate. After it dissolves, add metal precursors platinum acetylacetonate and copper chloride CuCl 2 2H 2 O and reducing agent allantoin, wherein the molar concentration of platinum acetylacetonate is 2mM, the molar concentration of copper chloride is 2mM, and the molar ...

Embodiment 2

[0023] In this example, the concentration of regulatory molecule CTAC was changed (10mM, 35mM), and other experimental conditions were kept unchanged as in Example 1. The prepared PtCu NPs material was shown in the text. Incomplete, when the concentration of regulatory molecules is increased to 35mM, the agglomeration phenomenon is more serious.

Embodiment 3

[0025] In this example, another reducing agent, 6-aminouracil, was used to replace allantoin. Other experimental conditions were kept unchanged with reference to Example 1. The prepared PtCu NPs material was displayed in the support material, and the morphology No longer a hollow cubic structure.

[0026] According to Examples 1-3, it can be known that the control of the reaction time, the concentration of the control molecule (CTAC) and the type of the reducing agent is crucial in the construction process of the dodecahedral nanoframe.

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Abstract

The invention discloses a method for synthesizing a dodecahedral PtCu nano frame material by a template-free solvothermal method, and belongs to the technical field of synthesis of dodecahedral nano frame materials. The key points of the technical scheme of the present invention are: adding the regulatory molecule cetyltrimethylammonium chloride into the solvent oleylamine, mixing evenly, stirring, ultrasonication, and after being completely dissolved, adding metal precursors platinum acetylacetonate and copper chloride CuCl 2 2H 2 O and reducing agent allantoin, put the mixed solution into the reaction kettle, fully react at 180°C for 10h, discharge the material and wash it several times with the mixed solution of ethanol and cyclohexane, and dry to obtain the dodecahedral PtCu nano frame material . The PtCu dodecahedron nano-frame material prepared by the invention can significantly improve its catalytic activity for hydrogen evolution reaction (HER) in acidic and alkaline media.

Description

technical field [0001] The invention belongs to the technical field of synthesis of dodecahedral nano-frame materials, and in particular relates to a method for synthesizing dodecahedral PtCu nano-frame (PtCu DNFs) materials by a template-free solvothermal method. Background technique [0002] A series of problems caused by energy consumption and fossil fuel combustion have received extensive attention, and the development of renewable green energy is an important strategic route to solve these problems. It is well known that Pt nanomaterials are the most effective catalysts in many important applications, but Pt catalysts are expensive, have slow reaction kinetics and poor stability. Therefore, for a long time, the challenge of preparing nanocatalysts is how to improve the catalytic activity and metal utilization of Pt-based catalysts. [0003] At present, the solution is mainly based on the following aspects: 1) Alloying with transition metals, reducing the amount of nobl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0549B22F1/0553B22F1/07B22F1/054
Inventor 王爱军张小芳冯九菊黄先燕
Owner ZHEJIANG NORMAL UNIVERSITY