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Palladium nano film preparation method and palladium/platinum nano film preparation method

A nano-palladium and nano-platinum technology, applied in the field of nano-film, can solve the problem of not preparing palladium/platinum bimetal nano-film and the like, and achieve the effects of simple preparation steps, high activity and good film quality

Active Publication Date: 2015-04-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the preparation of independent palladium / platinum bimetallic nanofilms with high catalytic activity in the prior art

Method used

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  • Palladium nano film preparation method and palladium/platinum nano film preparation method
  • Palladium nano film preparation method and palladium/platinum nano film preparation method
  • Palladium nano film preparation method and palladium/platinum nano film preparation method

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preparation example Construction

[0047] The invention discloses a preparation method of a palladium nano film, comprising the following steps:

[0048] Hydroxylamine hydrochloride is added to the mixed solution of palladium chloride and sodium citrate, and palladium nano film is obtained after reaction, and the molar ratio of the palladium chloride and sodium citrate is 1: (1-2.5).

[0049] The present invention uses sodium citrate (Na 3 CA) as a protective agent, hydroxylamine hydrochloride (NH 2 OH·HCl) as reducing agent, by reducing palladium chloride (PdCl 2 ) to obtain palladium nanoparticles, and then the synthesized palladium nanoparticles self-assemble rapidly at the water-air interface to form independent palladium nanofilms.

[0050] Wherein, palladium chloride is used as a palladium source compound, and sodium citrate is used as a protective agent. The concentration of palladium chloride in the mixed solution of described palladium chloride and sodium citrate is preferably 0.01~0.05g / L, more pre...

experiment example 1

[0064] The preparation of experimental example 1 independent palladium nano film

[0065] 10 ml of newly configured palladium chloride (PdCl 2 ) and sodium citrate (Na 3 The mixed solution of CA) is placed in a 50 ml beaker, and its PdCl 2 and Na 3 The dosages of CA were 0.20 mg and 0.50 mg, respectively, and then heated to boiling, followed by the rapid addition of 1.4 g / L of hydroxylamine hydrochloride (NH 2 OH·HCl), its consumption is 100 microliters; After continuing heating and boiling for 15 minutes, a palladium nanofilm visible to the naked eye will be produced at the water-air interface, and its film can cover the surface of the entire beaker liquid, and the palladium nanofilm obtained is for The mass current density in ethanol catalysis is about 2.1 times that of commercially available Pd / C.

experiment example 2

[0066] The preparation of experimental example 2 independent palladium nano film

[0067] 10 ml of newly configured palladium chloride (PdCl 2 ) and sodium citrate (Na 3 The mixed solution of CA) is placed in a 50 ml beaker, and its PdCl 2 and Na 3 The dosages of CA were 0.25 mg and 0.60 mg, respectively, and then heated to boiling, followed by the rapid addition of 1.4 g / L of hydroxylamine hydrochloride (NH 2 OH·HCl), its consumption is 150 microliters; After continuing heating and boiling for 15 minutes, a palladium nanofilm visible to the naked eye will be produced at the water-air interface, and its film can cover the surface of the entire beaker liquid, and the palladium nanofilm obtained is for The mass current density in ethanol catalysis is about 1.7 times that of commercially available Pd / C.

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Abstract

The invention discloses a preparation method of a palladium nano film, which comprises the following steps: adding hydroxylamine hydrochloride in a mixed solution of palladium chloride and sodium citrate and reacting to obtain the palladium nano film. According to the invention, sodium citrate (Na3CA) is taken as a protective agent, hydroxylamine hydrochloride (NH2OH.HCl) is taken as a reducing agent, palladium chloride (PdC12) is reduced to obtain the palladium nano particles, then synthesized palladium nano particles enable self assembly on a water-air interface to form the independent palladium nano film. The preparation method of the palladium nano film has the advantages of simple step and short time consuming, the prepared palladium nano film has good quality and high activity on catalysis of an alcohols oxidation reaction. The invention also provides the preparation method of palladium / platinum nano film, the preparation method has the advantages of simple step, short time consuming and good film quality, and the prepared palladium / platinum bimetallic nano film has high activity on the catalysis of the alcohols oxidation reaction.

Description

technical field [0001] The invention relates to the technical field of nanometer films, more specifically, to a preparation method of a palladium nanometer film and a preparation method of a palladium / platinum nanometer film. Background technique [0002] As an important catalyst, palladium-based nanomaterials have become a hot topic in scientific research in the fields of organic synthesis and fuel cells (Nature 2002, 418, 164), and are gradually being valued by industrial production. In order to optimize the catalytic activity of palladium-based nanomaterials, factors such as the size, shape and composition of the material itself are particularly important, for example, highly ordered palladium nanowire arrays (Adv.Mater.2007,19,4256) and have high Palladium nanoparticles (J.Am.Chem.Soc.2010, 132, 7580) with crystalline facets all exhibit good catalytic activity in ethanol fuel cells. Recently, related researchers have prepared a hexahedral palladium nanosheet with indepe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/44
Inventor 金永东吴昊曦
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI