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Three-dimensional porous gold-solver-platinum ternary alloy nanometer material as well as preparation method and application thereof

A ternary alloy, three-dimensional porous technology, applied in the direction of nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of low catalytic activity, long reaction cycle, poor stability, etc. Simple and easy to operate, the effect of improving catalytic activity

Active Publication Date: 2018-05-18
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve technical problems such as low catalytic activity, poor stability, complex processing and long reaction cycle of catalysts used in methanol fuel cells in the prior art, the present invention provides a three-dimensional porous gold-silver-platinum ternary alloy nanomaterial and its preparation Method and Application

Method used

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  • Three-dimensional porous gold-solver-platinum ternary alloy nanometer material as well as preparation method and application thereof
  • Three-dimensional porous gold-solver-platinum ternary alloy nanometer material as well as preparation method and application thereof
  • Three-dimensional porous gold-solver-platinum ternary alloy nanometer material as well as preparation method and application thereof

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preparation example Construction

[0033] Specifically, the preparation method of the three-dimensional porous gold-silver-platinum ternary alloy nanomaterial may include the following steps:

[0034] Step A. Mix potassium chloroplatinate, ascorbic acid, and gold@silver nanocube colloidal solution together so that the concentration of potassium chloroplatinate in the mixed liquid is 0.0001-0.0005mol / L, and the concentration of ascorbic acid is 0.001-0.004mol / L, and reacted for 0.5 to 1 hour to prepare a colloidal solution of gold@silver platinum nanocubes. Wherein, the gold@silver nanocube colloidal solution is a gold@silver nanocube colloidal solution in an ethylene glycol system. In practical applications, the preparation method of the gold@silver nanocube may include the following steps:

[0035](1) Step A1, adding chloroauric acid and polydiallyl dimethyl ammonium chloride with a molecular weight of 100,000 to 200,000 in the ethylene glycol solution, so that the concentration of chloroauric acid in the mi...

Embodiment 1

[0048] Such as figure 1 As shown, a three-dimensional porous gold-silver-platinum ternary alloy nanomaterial is prepared by following steps:

[0049] Step a, inject an appropriate amount of 20wt% polydiallyldimethylammonium chloride aqueous solution (wherein, the molecular weight of polydiallyldimethylammonium chloride is 100000~200000) into 70ml ethylene glycol solution, Add chloroauric acid solution and stir evenly, make the concentration of chloroauric acid in the liquid after mixing be 0.0005 mol / liter, the concentration of polydiallyl dimethyl ammonium chloride be 0.025 mol / liter, then at 220 ℃ Reaction under the conditions for 1 hour, naturally cooled to room temperature, thereby making gold nano-octahedral colloidal solution; wherein, the transmission electron micrograph of gold nano-octahedron can be as follows figure 1 as shown in a.

[0050] Step b, at room temperature, add silver nitrate and ascorbic acid aqueous solution to 70ml of the gold nano-octahedral colloi...

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Abstract

The invention discloses a three-dimensional porous gold-solver-platinum ternary alloy nanometer material as well as a preparation method and application thereof. The nanometer material comprises at least one three-dimensional porous gold-solver-platinum ternary alloy nanometer ball; each three-dimensional porous gold-solver-platinum ternary alloy nanometer ball is a nanometer ball having an alloyframework which is of a continuous structure; and a plurality of nanometer pore passages in three-dimensional distribution are arranged among the alloy frameworks. The preparation method of the nanometer material comprises the following steps: mixing potassium chloroplatinate, ascorbic acid and a gold@silver nanometer cube colloidal solution and reacting to prepare a gold@silver-platinum nanometercube colloidal solution; afterwards mixing the gold@silver-platinum nanometer cube colloidal solution with deionized water and performing laser irradiation to prepare a gold-silver-platinum ternary alloy nanometer ball colloidal solution; and finally adding an etching agent to remove some silver elements to obtain the three-dimensional porous gold-solver-platinum ternary alloy nanometer material.The three-dimensional porous gold-solver-platinum ternary alloy nanometer material disclosed by the invention is uniform in size and good in monodispersity, has a relatively large specific surface area and lots of active sites, has excellent electro-catalytic activity and stability on methanol and can greatly shorten the reaction time in a preparation process; and a processing process is simple and easy to operate.

Description

technical field [0001] The invention relates to the field of ternary alloy nanomaterials, in particular to a three-dimensional porous gold-silver-platinum ternary alloy nanomaterial and its preparation method and application. Background technique [0002] In recent years, with the rapid development of economy, my country's demand for energy is increasing day by day. Fossil energy, as the main energy consumed in the world at present, brings convenience to us, but also causes serious pollution to the earth's environment. Therefore, it is becoming more and more important to develop clean energy that can replace fossil energy. [0003] Among various clean energy sources, fuel cells have become an important way to solve energy and environmental problems. Methanol fuel cells are widely used in portable devices due to their high working efficiency and environmental friendliness. Compared with hydrogen energy, methanol is a cheaper liquid fuel, which is easy to store and transport...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07B22F1/065B22F1/054
Inventor 李越张涛柏彧孙一强刘迪龙
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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