Method for preparing Pd/CuO composite nanometer porous material by using amorphous alloy for dealloying

An amorphous alloy, nanoporous technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high cost and low catalytic activity of noble metal catalysts , to achieve the effect of low production cost, small pore size and large specific surface area

Inactive Publication Date: 2015-04-01
TIANJIN UNIV
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Problems solved by technology

However, the catalytic activity of bulk nobl

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  • Method for preparing Pd/CuO composite nanometer porous material by using amorphous alloy for dealloying
  • Method for preparing Pd/CuO composite nanometer porous material by using amorphous alloy for dealloying

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[0015] Example 1:

[0016] The method for preparing Pd / CuO composite nano-porous structure material by using amorphous alloy dealloying includes the following steps:

[0017] Step 1. Prepare Ti-Cu-Pd amorphous alloy according to the following components and atomic percentage content: Ti content is 30%, Cu content is 65%, and Pd content is 5%;

[0018] Step two, the Ti obtained in step one 30 Cu 65 Pd 5 The amorphous alloy is cut into strips with a thickness of 10μm-30μm, a width of 15mm-20mm, and a length of 1cm-3cm; the strip is sonicated in absolute ethanol for 5 minutes, washed in deionized water and dried in air for use;

[0019] Step three, take the Ti obtained in step two 30 Cu 65 Pd 5 Amorphous alloy strip with a mass of 0.1g and 46ml of a 1.25M hydrochloric acid aqueous solution with a molar concentration of 1.25M are placed in a closed container and placed in a 90℃ drying box for 5 hours of heat preservation and reaction. After the reaction, the sample prepared is deionized wa...

Example Embodiment

[0022] Example 2:

[0023] The preparation process is basically the same as that of Example 1, with the only difference being: in step 3, the molar concentration of the aqueous hydrochloric acid solution is 1.25M, the reaction temperature is 90°C, and the reaction time is 5h. figure 1 (B) shows the SEM image of the Pd / CuO composite nanoporous structure material prepared in Example 2. figure 2 The dotted line in shows the cycle Fuan curve of the Pd / CuO composite nanoporous structure material prepared in Example 2.

Example Embodiment

[0024] Example 3:

[0025] The preparation process is basically the same as that of Example 1, except that: in step 3, the molar concentration of the aqueous hydrochloric acid solution is 5M, the reaction temperature is 90°C, and the reaction time is 5h. figure 1 (C) shows the SEM image of the Pd / CuO composite nanoporous structure material prepared in Example 3. figure 2 The dotted line in the middle shows the cyclic Fu'an curve of the Pd / CuO composite nanoporous structure material prepared in Example 3.

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Abstract

The invention discloses a method for preparing a Pd/CuO composite nanometer porous material by using amorphous alloy. The method comprises: preparing Ti-Cu-Pd amorphous alloy according to the following atomic percent content: 20%-30% of Ti, 40%-65% of Cu, and 5%-20% of Pd; cutting the Ti-Cu-Pd amorphous alloy into a strip with the thickness of 10 mu m-30 mu , the width of 15 mm-20 mm and the length of 1 cm-3 cm; performing ultrasonic processing in anhydrous ethanol for 5 min, cleaning with deionized water, and drying for usage; putting the strip and a hydrochloric acid aqueous solution with the molar ratio of 1.25 M-5 M in an enclosed container for reaction, and controlling the reaction temperature to be 70 DEG C-180 DEG C and the reaction time of 4 h-10 h, flushing the prepared sample after the reaction is finished, and drying, so as to obtain the Pd/CuO composite nanometer porous material. The Pd/CuO composite nanometer porous material has a composite nanometer porous structure with large specific surface area and electrocatalytic activity. The method is low in enforcement cost, simple to operate and short in time consumption, and is efficient and economic.

Description

technical field [0001] The invention relates to a novel nanometer material, which is mainly used as an anode catalyst material in a fuel cell system. Background technique [0002] In recent years, fuel cells are regarded as a promising clean energy source and have gradually become a research hotspot at home and abroad. Platinum and platinum-based alloys, as the most commonly used fuel cell catalysts, have attracted extensive attention from researchers. Platinum-based nanowires, nanoflowers and various supported platinum-based catalysts have been prepared by chemical methods, electrodeposition and other methods. However, the preparation cost of traditional platinum-based catalysts is high, and its stability is low. Therefore, it is of great significance to develop new anode catalysts with high activity and low cost in the field of fuel cells. Palladium has similar properties to platinum, but is less expensive than platinum, and palladium-based catalysts also exhibit higher c...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/10H01M4/92
CPCY02E60/50
Inventor 徐文策朱胜利李朝阳崔振铎杨贤金井上明久
Owner TIANJIN UNIV
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