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Nano-porous palladium metal catalyst and preparing method thereof

A metal catalyst, nano-palladium technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problem of increasing precious metal loss, unfavorable synthesis and application, and reducing catalytic efficiency and other issues, to achieve the effect of improving catalytic activity, reducing loss, and increasing specific surface area

Inactive Publication Date: 2010-02-17
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of such catalysts is generally complicated, and the particles are easy to aggregate and difficult to recycle, thereby reducing the catalytic efficiency, which increases the loss of precious metals to a certain extent, which is not conducive to large-scale synthesis and application.

Method used

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  • Nano-porous palladium metal catalyst and preparing method thereof
  • Nano-porous palladium metal catalyst and preparing method thereof
  • Nano-porous palladium metal catalyst and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation method of porous nano-palladium metal catalyst:

[0023] (1) An alloy containing an atomic number ratio of Cu:Pd of 75:25 (Cu 75 Pd 25 ) The sheet is mechanically polished with 3500-mesh sandpaper, then put into deionized water for ultrasonic 10min and taken out and dried with nitrogen for subsequent use;

[0024] (2) Using the alloy sheet processed in step (1) as a working electrode in a three-electrode system, using a platinum sheet as a counter electrode and pure copper as a reference electrode, in the electrolytic cell of the three-electrode system, a room temperature ionic liquid ( 1-butyl-3-methylimidazolium tetrafluoroborate) was used as the electrolyte, and the potentiostatic method was used to selectively corrode and dissolve copper at a potential of 0.5V and 22 ° C. After 2 hours, the alloy flakes after dissolving copper were taken out, It was repeatedly rinsed with deionized water and dried with nitrogen to obtain Pd-rich porous nanostructured m...

Embodiment 2

[0027] Preparation method of porous nano-palladium metal catalyst:

[0028] (1) An alloy containing an atomic number ratio of Cu:Pd of 75:25 (Cu 75 Pd 25 ) The sheet is mechanically polished with 3500-mesh sandpaper, then put into deionized water for ultrasonic 10min and taken out and dried with nitrogen for subsequent use;

[0029] (2) Using the alloy sheet processed in step (1) as a working electrode in a three-electrode system, using a platinum sheet as a counter electrode and pure copper as a reference electrode, in the electrolytic cell of the three-electrode system, a room temperature ionic liquid ( 1-butyl-3-methylimidazolium tetrafluoroborate) was used as the electrolyte, and the potentiostatic method was used to selectively corrode and dissolve the copper at a potential of 1V and 10 °C. It was repeatedly rinsed with deionized water and dried with nitrogen to obtain Pd-rich porous nanostructured materials (such as figure 2 shown);

[0030] (3) immersing the Pd-ric...

Embodiment 3

[0032] The dechlorination efficiency of the porous nano-palladium metal catalyst prepared by the present invention is shown in Table 1 after the electrolysis of carbon tetrachloride and chlorobenzene at different potentials in an acidic medium. Nano-palladium is the working electrode, platinum sheet is the counter electrode, and the electrolyte solution is 5-50 mg L -1 Carbon tetrachloride and 0.5mol dm -3 H 2 SO 4 mixed solution or 5~50mgL -1 Chlorobenzene and 0.5mol dm -3 H 2 SO 4 The mixed solution was subjected to potentiostatic electrolysis at different potentials shown in Table 1. Experiments show that the porous nano-palladium metal catalyst has a good degradation effect on chlorine-containing organic compounds.

[0033] Table 1

[0034]

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PUM

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Abstract

The invention discloses a nano-porous palladium metal catalyst having an even three-dimensional continuous mesh-shaped porous structure. The nano-porous palladium metal catalyst is prepared by that analloy flake containing Cu and Pd according to atom number of 75:25 is performed with selective corrosion of dissolved copper with a constant potential method; then, the obtained product is dipped inPdCl2 and HClO4 mixture solution for replacement reaction to remove residual copper atom so as to prepare the nano-porous palladium metal catalyst. The nano-porous palladium metal catalyst has big specific surface area, greatly improves catalytic activity in catalysis application, needs no substrate loading and has simple preparing method and technology and relatively low cost.

Description

technical field [0001] The invention relates to a metal catalyst, in particular to a porous nano-palladium metal catalyst and a method for preparing the porous nano-palladium metal catalyst by electrochemically corroding an alloy in an ionic liquid at room temperature. Background technique [0002] As a transition metal material, palladium has very good catalytic activity. Its most notable feature is its excellent hydrogen storage performance. Palladium metal materials, especially palladium nanostructured materials, can absorb a large amount of active hydrogen. It plays an extremely important role in the hydrogenolysis reaction. [0003] In recent years, more and more attention has been paid to the synthesis and application of palladium nanomaterials. The preparation of palladium nanomaterials with controllable shape, stable performance and high specific surface area has been the focus of researchers. We found that the current research on palladium nanomaterials Most of the...

Claims

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Application Information

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IPC IPC(8): B01J35/10B01J23/44B01J37/34B01J37/02C25C5/02C25B11/08A62D3/115A62D101/22
Inventor 黄理辉马厚义李文静邱翠翠孙媛媛
Owner SHANDONG UNIV
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