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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalytic activity of bulk noble metal catalysts is low and the cost is high

Method used

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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

Examples

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Embodiment 1

[0016] A method for preparing a Pd / CuO composite nanoporous structure material by dealloying an amorphous alloy comprises the following steps:

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

[0018] Step 2, the Ti obtained in step 1 30 Cu 65 PD 5 The amorphous alloy is cut into strips with a thickness of 10 μm-30 μm, a width of 15 mm-20 mm, and a length of 1 cm-3 cm; the strips are ultrasonicated in absolute ethanol for 5 minutes, washed in deionized water and dried in air for later use;

[0019] Step 3, get the Ti obtained by step 2 30 Cu 65 PD 5 Put 0.1g of amorphous alloy strip mass and 46ml of hydrochloric acid aqueous solution with a molar concentration of 1.25M in a closed container, and put it in a 90°C drying oven, keep it warm for 5h, and use deionized water to prepare the sample after the reaction After washing an...

Embodiment 2

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

Embodiment 3

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