Method for preparing electrocatalytic noble metal nanomaterial with three-dimensional network structure

An electrocatalytic material and network structure technology, applied in the field of preparation of noble metal nano-electrocatalytic materials, can solve the problems of not being widely applicable to a variety of noble metals and cumbersome preparation methods, and achieve adjustable size, simple equipment, and improved hydrogen storage performance Effect

Active Publication Date: 2011-08-31
太仓佳诚半导体设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparation methods are relatively cumbersome, and only for one kind of precious metal, and cannot be widely applied to many kinds of precious metals, so they have great limitations.

Method used

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  • Method for preparing electrocatalytic noble metal nanomaterial with three-dimensional network structure
  • Method for preparing electrocatalytic noble metal nanomaterial with three-dimensional network structure
  • Method for preparing electrocatalytic noble metal nanomaterial with three-dimensional network structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 0.005 gram of palladium acetate and 0.01 gram of DTAB (dodecyltrimethylammonium bromide) and put it into a reaction kettle with a volume of 50 ml (the mass ratio of palladium acetate and DTAB is 1: 2), add 20 ml of ethylene glycol (to make the mass fraction of palladium acetate 0.0224%), and magnetically stir to form a homogeneous suspension.

[0026] (2) Add 0.05 ml of formaldehyde to the stirred suspension, and magnetically stir for 5 minutes.

[0027] (3) The reaction kettle was sealed, placed in an oven, and reacted at 150° C. for 8 hours.

[0028] (4) Take out the reactor and cool it down to room temperature naturally.

[0029] (5) Transfer the reacted product from the reaction kettle to a centrifuge tube, alternately centrifuge and ultrasonically wash the product with acetone and absolute ethanol, repeat 5 times, and obtain pure three-dimensional network structure palladium.

[0030] The SEM photograph of embodiment 1 is attached figure 1 The first ph...

Embodiment 2

[0032] (1) Weigh 0.01 gram of palladium acetate and 0.02 gram of DTAB and put it into a 25 ml reaction kettle (the mass ratio of palladium acetate and DTAB is 1:2), add 10 milliliters of ethylene glycol (make the mass fraction of palladium acetate 0.0896%), magnetically stirred to form a homogeneous suspension.

[0033] (2) Add 0.1 ml of formaldehyde to the stirred suspension, and magnetically stir for 5 minutes.

[0034] (3) The reaction kettle was sealed, placed in an oven, and reacted at 150° C. for 8 hours.

[0035] (4) Take out the reactor and cool it down to room temperature naturally.

[0036] (5) Transfer the reacted product from the reaction kettle to a centrifuge tube, alternately centrifuge and ultrasonically wash the product with acetone and absolute ethanol, repeat 5 times, and obtain pure three-dimensional network structure palladium.

[0037] The SEM photo of Example 2 is similar to that of Example 1, but the size of the basic particle unit constituting the ne...

Embodiment 3

[0039] (1) Take by weighing 0.02 gram of palladium acetate and 0.04 gram of DTAB and put into a volume of 25 milliliters of reactor (the mass ratio of palladium acetate and DTAB is 1: 2), add 5 milliliters of ethylene glycol (the massfraction of palladium acetate is 0.3584%), magnetically stirred to form a homogeneous suspension.

[0040] (2) Add 0.2 ml of formaldehyde to the stirred suspension, and magnetically stir for 5 minutes.

[0041] (3) The reaction kettle was sealed, placed in an oven, and reacted at 150° C. for 8 hours.

[0042] (4) Take out the reactor and cool it down to room temperature naturally.

[0043] (5) Transfer the reacted product from the reaction kettle to a centrifuge tube, alternately centrifuge and ultrasonically wash the product with acetone and absolute ethanol, repeat 6 times, and obtain pure three-dimensional network structure palladium.

[0044] The SEM photo of Example 3 is similar to that of Example 1, but the size of the basic particle unit co...

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Abstract

The invention discloses a method for preparing an electrocatalytic noble metal nanomaterial with a three-dimensional network structure, and the method is implemented by using a one-step hydrothermal process. The method comprises the following steps: firstly, adding ethanediol, noble metal precursors and surfactants into a reaction kettle, and uniformly stirring the obtained mixture in the reaction kettle; then, adding formaldehyde into the reaction kettle, and evenly stirring the mixture in the reaction kettle; sealing the reaction kettle, putting the reaction kettle into a baking oven to react for 6-10 hours at a temperature of 130-200 DEG C; and finally, naturally cooling the reaction kettle to room temperature, then carrying out centrifugal washing on the reaction kettle. By using the method disclosed by the invention, the preparation of electrocatalytic noble metal nanomaterials with a three-dimensional network structure can be realized; in a porous network structure formed by themutual fusion of noble metal particles with a particle diameter of dozens of nanometers, the hole size is several nanometers to hundreds of nanometers, the attribute advantages of noble metals and the porous network structure are combined, and the one-step hydrothermal process is adopted; and compared with other existing methods, the method disclosed by the invention has the characteristics of simplicity, strong universality, simple instrument, high repeatability, and the like.

Description

technical field [0001] The invention relates to the technical field of functional materials, in particular to a method for preparing a noble metal nanometer electrocatalytic material. Background technique [0002] Precious metal elements include ruthenium, rhodium, palladium, gold, silver, platinum and other elements, which have excellent physical and chemical properties (high temperature oxidation resistance and corrosion resistance, etc.), electrical properties (excellent electrical conductivity, high temperature thermoelectric properties and stable Resistance temperature coefficient, etc.), high catalytic activity, strong coordination ability, etc., are widely used in industry. Noble metals are used as catalysts in many chemical reactions, especially platinum group metals have high catalytic activity, and their papers account for 70% of catalyst papers. Because noble metal elements belong to transition metal elements, they have empty d-band orbitals, so they have propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/52B01J35/10B82Y40/00
Inventor 张兵张晋崔建华张华侯双霞许友
Owner 太仓佳诚半导体设备有限公司
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