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Method for preparing palladium carried metal-based electrode used for electro-catalysis of chlore-aromatics for dechlorination

A chlorinated aromatic hydrocarbon and electrocatalysis technology, which is applied to electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of simple process, inability to effectively control palladium deposition morphology, electrocatalytic electrode fabrication, etc., and achieve high catalytic activity and improve economy. and practicality, the effect of simple and easy process

Inactive Publication Date: 2006-09-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a big difference between the surface morphology formed by thin-layer electroplating of palladium on the metal and the loading conditions required for electrocatalytic dechlorination. The ideal state is that palladium particles are highly dispersed on the surface of the metal substrate, the particles are small and compact, and the substrate has a certain density. exposure, and the interface between the palladium particles and the substrate is the highly active area of ​​the dechlorination process, so these electroplating processes cannot be directly used for the production of electro-dechlorination catalytic electrodes
In addition, there are also individual studies using titanium mesh for palladium electrodeposition loading to make electrocatalytic dechlorination electrodes for the removal of chlorophenols, but the process is too simple and cannot effectively control the deposition morphology of palladium and is suitable for a variety of metal porous materials Fabrication of electrocatalytic electrodes to reflect the dechlorination effect of different metal substrates
In conclusion, there is no report on the development of an electrodeposition process for palladium-modified high-efficiency dechlorination electrodes suitable for various metal substrates.

Method used

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  • Method for preparing palladium carried metal-based electrode used for electro-catalysis of chlore-aromatics for dechlorination
  • Method for preparing palladium carried metal-based electrode used for electro-catalysis of chlore-aromatics for dechlorination

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment one: palladium loading of foamed nickel base material

[0030] The cutting size is 1.6mm thick and the specific surface area is 1.35×10 6 m 2 / m 3 Nickel foam is loaded according to the following steps:

[0031] 1) Prepare a mixed deposition solution of palladium chloride with a concentration of 5mM and sodium acetate with a concentration of 50mM at a molar ratio of 1:10, in a water bath at 60°C, ultrasonic for about 1 hour, the color of the solution changes from yellow to dark brown at last , and then moved to a single-chamber electrolytic cell using a three-electrode system. Put it into acetone solution for 40 minutes to remove oil, take it out, rinse it with water, put it into 80g / L sulfuric acid solution for ultrasonic etching for 30s, take it out, wash it with water and drain it, and then use it as the working electrode of the three-electrode system. In the deposition solution, and connect the counter electrode (platinum black) and reference electrode...

Embodiment 2

[0033] Embodiment two: palladium loading of foamed copper matrix material

[0034] The cutting size is 1.6mm thick and the specific surface area is 1.35×10 6 m 2 / m 3 The foamed copper matrix material is loaded according to the following steps:

[0035] 1) Prepare a mixed deposition solution of palladium chloride with a concentration of 5mM and sodium acetate with a concentration of 75mM at a molar ratio of 1:15. Under a water bath at 60°C, ultrasonically for about 1 hour, the color of the solution changes from yellow to dark brown at the end , and then moved to a single-chamber electrolytic cell using a three-electrode system. Put it into acetone solution for 40min to remove oil, take it out, rinse it with clean water, put it into 80g / L sulfuric acid solution for 5s etching, take it out, wash it with clean water and drain it, and then use it as the working electrode of the three-electrode system for immersion deposition solution, and connect the counter electrode (platinu...

Embodiment 3

[0037] Embodiment three: palladium loading of industrial titanium mesh matrix material

[0038] Cut out an industrial titanium mesh with a size of 40 mesh and a wire diameter of 0.17mm, and load it according to the following steps:

[0039] 1) Prepare a mixed deposition solution of palladium chloride with a concentration of 5mM and sodium acetate with a concentration of 100mM at a molar ratio of 1:20. Under a water bath at 60°C, ultrasonically for about 1 hour, the color of the solution changes from yellow to dark brown at last , and then moved to a single-chamber electrolytic cell using a three-electrode system, the amount of liquid added is based on the final metal substrate that can be completely immersed in the desired deposition, and kept stirring and heating (40 ° C), during which the industrial titanium mesh substrate material to be loaded Put into 5% (mass percentage) Na 2 CO 3 Boil in the solution for 30 minutes to remove oil, take it out, rinse it with clean water,...

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Abstract

The invention discloses a manufacture method for Pb load metal base electrode using for dechloridizing in chloroaryl hydrocarbons electrocatalysis. It includes electric sediment liquid mixing process and sediment process. Pouring palladium chloride and sodium acetate into pure water to make mixing sediment liquid of 5mM palladium solution and 50mM-100mM sodium acetate solution, taking heating super sound dissolving to make the color turning to nigger-brown from yellow, adding the liquid and metal base into tri-electrode system single room electric settling basin to take heating and whisking, taking low current sediment for several times and each changing the surface, the electrode loading Pb would be formed and could be taken out to use. The invention has simple technology process, and high controllability.

Description

technical field [0001] The invention belongs to the technology of environmental restoration and the production technology of palladium-modified electrodes, and particularly relates to a method for repairing main environmental media (soil, sediment and groundwater) polluted by persistent chlorinated aromatic hydrocarbons and removing other chlorinated aromatic hydrocarbon pollutants. A method for preparing a palladium-loaded metal-based electrode for electrocatalytic dechlorination of chlorinated aromatic hydrocarbons. Background technique [0002] Chlorinated hydrocarbons are the main toxic and refractory pollutants in the environment. In recent years, as people worldwide have paid increasing attention to such organic pollutants (especially highly toxic and highly residual chlorinated aromatics, such as the 12 persistent organic compounds listed in the Stockholm Convention), palladium-catalyzed dechlorination The application of technology in the field of environmental resto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/08
Inventor 杨波余刚邓述波
Owner TSINGHUA UNIV
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