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Method for synthesizing dodecahedral PtCu nanometer frame material through 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. Achieving the effect of simple preparation method and improved catalytic activity

Active Publication Date: 2018-07-24
ZHEJIANG NORMAL UNIVERSITY
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  • 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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  • Method for synthesizing dodecahedral PtCu nanometer frame material through template-free solvothermal method
  • Method for synthesizing dodecahedral PtCu nanometer frame material through template-free solvothermal method
  • Method for synthesizing dodecahedral PtCu nanometer frame material through 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, is used to replace allantoin. Other experimental conditions refer to Example 1 and remain unchanged. The prepared PtCu NPs material is displayed in the support material, and the morphology No longer a hollow cubic structure.

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

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Abstract

The invention discloses a method for synthesizing a dodecahedral PtCu nanometer frame material through a template-free solvothermal method, and belongs to the technical field of synthesis of the dodecahedral nanometer frame material. The invention has the technical scheme that the method comprises the steps of adding a regulation molecule i.e. hexadecyl trimethyl ammonium chloride into a solvent i.e. oleylamine to be uniformly mixed and stirred, and carrying out ultrasonic treatment; after full dissolving, adding metal precursors i.e. bisplatinum and copper chloride CuCl2.2H2O as well as a reducing agent i.e. allantoin, adding a mixed solution into a reaction kettle, fully reacting at 180 DEG C for 10 h, and discharging; and washing with a mixed solution of ethyl alcohol and cyclohexane multiple times, and drying to obtain the dodecahedral PtCu nanometer frame material. When the PtCu dodecahedral nanometer frame material prepared through the invention is applied to acid and alkaline media, the catalytic activity on hydrogen evolution reaction (HER) can be remarkably improved.

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 Applications(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
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