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Preparation method and application of PdSn-CuO composite material with nano-porous structure

A nano-porous and composite material technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of low catalytic performance and poor anti-poisoning ability of methanol fuel cell anode catalysts, so as to improve anti-poisoning ability and catalytic performance, High specific surface area, simple and easy-to-control process

Inactive Publication Date: 2017-12-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of low catalytic performance and poor anti-poisoning ability of methanol fuel cell anode catalyst, a kind of PdSn-CuO composite material with nanoporous structure proposed by the present invention is made of aluminum-tin-palladium-copper alloy strips containing tin, A composite material of palladium and copper oxide having a continuous nanoporous-ligament structure, the pore diameter of the nanoporous-ligament structure is 15nm-40nm, and the ligament width is 20nm-60nm

Method used

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  • Preparation method and application of PdSn-CuO composite material with nano-porous structure
  • Preparation method and application of PdSn-CuO composite material with nano-porous structure
  • Preparation method and application of PdSn-CuO composite material with nano-porous structure

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Embodiment 1

[0027] Embodiment 1: with Al 84 PD 5 sn 10 Cu 1 Preparation of PdSn-CuO composite material with nanoporous structure from amorphous alloy strips, the steps are as follows:

[0028] Step 1. Prepare Al with a thickness of about 20um according to the content of 10 atomic percent of Sn, 5 atomic percent of Pd, 84 atomic percent of Al, and 1 atomic percent of Cu. 84 PD 5 sn 10 Cu 1 Amorphous alloy strips.

[0029] Step two, the composition is Al 84 PD 5 sn 10 Cu 1 The amorphous alloy strips are cut into amorphous alloy splines with a width of 20 mm and a length of 2 cm.

[0030] Step 3, remove 0.1g and 40ml of aqueous sodium hydroxide solution with a molar concentration of 3 moles from the amorphous alloy sample strip obtained in step 2, and place them together in a closed container, and put them in a drying oven with a reaction temperature of 60°C, and keep them warm 48h.

[0031] Step 4: Wash the sample after the reaction in Step 3 repeatedly with deionized water and...

Embodiment 2

[0037] Embodiment 2: with Al 84 PD 5 sn 10 Cu 2 The preparation of nanoporous PdSn-CuO composite material from amorphous alloy strips is the same as step two and four in embodiment 1, except that the atomic percentage of Cu and the concentration of corrosive liquid sodium hydroxide aqueous solution in step one and step three different, namely:

[0038] The atomic percentage of Cu in step 1 is 2%, the concentration of sodium hydroxide solution in step 3 is 1 mole, the reaction temperature is 60°C, and the reaction time is 48h. figure 1 (b) shows the SEM image of the PdSn-CuO composite nanoporous structure material prepared in Example 2, the pore diameter is 20nm, and the ligament width is 36nm. The PdSn-CuO composite material prepared in this example was applied in the performance test of electrocatalyzing methanol under alkaline conditions. figure 2 The middle thick solid line shows the cyclic voltammetry curve of the nanoporous structure of the PdSn-CuO composite materi...

Embodiment 3

[0039] Embodiment 3: with Al 83 PD 5 sn 10 Cu 2 The preparation of nanoporous PdSn-CuO composite material from amorphous alloy strips is the same as step 2 and step 4 in embodiment 1, except that the atomic percentage of Cu in step 1 and the concentration of sodium hydroxide corrosion solution in step 3, the reaction The temperature and time are different, namely:

[0040] The atomic percentage content of Cu in step 1 is 2%, the concentration of sodium hydroxide aqueous solution in step 3 is 1 mole, the reaction temperature is 50°C, and the reaction time is 36h. figure 1 (c) shows the microscopic photo of the Pd-Sn composite material with nanoporous structure prepared in Example 3, the pore diameter is 24nm, and the ligament width is 31nm. The PdSn-CuO composite material prepared in this example was applied in the performance test of electrocatalyzing methanol under alkaline conditions. figure 2 The thick dotted line in shows the cyclic voltammetry curve of the nanoporou...

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Abstract

The invention discloses a preparation method of a PdSn-CuO composite material with a nano-porous structure. An Al-Pd-Sn-Cu amorphous alloy strip with the thickness of 10 to 30 [mu]m is prepared from the following components in percentage by atom: 81 to 84 percent of Al, 3 to 7 percent of Pd, 8 to 12 percent of Sn and 1 to 4 percent of Cu. The Al-Pd-Sn-Cu amorphous alloy strip is put into a hydrothermal reactor holding a certain amount of a corrosive liquid, an alloy is removed by using a hydrothermal reaction, and the PdSn-CuO composite material is obtained after the alloy-removed material is cleaned and dried. The composite material has large specific surface area and a stable structure; the interpenetration facilitates the transmission of electrons and ions. The preparation method has the advantages of simple operation, easiness in implementation, low cost, economy and high efficiency. The obtained composite material is used for electrocatalytic property of methanol; compared with a currently-used common commercial palladium carbon catalyst, the composite material has the advantages of higher electrocatalytic activity and long-term stability.

Description

technical field [0001] The invention relates to a method for preparing a PdSn-CuO composite material with a nanoporous structure and its application in the aspect of methanol electrocatalysis performance, belonging to the technical field of electrochemical new energy and new materials. Background technique [0002] Direct methanol fuel cells (DMFCs) have become a new battery device with advantages of low temperature operation, high energy efficiency and low emission among many kinds of fuel cells, and are applied in multifunctional portable mobile devices and various small electronic instruments. However, the current bottleneck of the widespread application of this technology lies in the high cost of market introduction and low long-term stability. By introducing metal oxide CuO into the noble metal Pd-based catalyst, the adsorption and dissociation of methanol molecules on the catalyst surface can be accelerated, the adsorption of carbon-containing intermediates and other i...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9025H01M4/905Y02E60/50
Inventor 朱胜利牛孟影杨贤金崔振铎
Owner TIANJIN UNIV
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