Polypyrrole-modified ag-pd bimetallic composite electrocatalytic cathode and its preparation method and application

A technology of polypyrrole and electrocatalysis, applied in chemical instruments and methods, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problem of high price of electrocatalytic cathode, low catalyst efficiency, Short service life and other problems, to achieve good electrocatalytic reduction degradation effect, strong binding force, and improve catalytic performance

Active Publication Date: 2021-04-27
HENAN UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the technical problems of the electrocatalytic cathode in the prior art, such as high price, poor stability, short service life and low catalyst efficiency

Method used

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  • Polypyrrole-modified ag-pd bimetallic composite electrocatalytic cathode and its preparation method and application

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preparation example Construction

[0039] A preparation method of a polypyrrole-modified Ag-Pd bimetallic composite electrocatalytic cathode, comprising the following steps:

[0040] Step 1, the Ti sheet was polished with 100-grit sandpaper, and then ultrasonically cleaned in acetone, absolute ethanol and deionized water for 10 min for decontamination, and then placed in a mixed solution of boiled concentrated hydrochloric acid and water with a volume ratio of 1:2 for 15 min, and finally rinsed with deionized water to obtain a Ti matrix.

[0041] Step 2, using water as a solvent, prepare a mixed solution containing 90-100 mmol / L of pyrrole, 3-7 mmol / L of sodium dodecylbenzene sulfonate, and 0.2-0.5 mmol / L of sulfuric acid as a sedimentation solution, using the obtained solution in step 1. The titanium sheet is the anode and the platinum sheet is the cathode. Under the conditions of a deposition current of 12-15 mA and a deposition time of 10-12 min, a polypyrrole / Ti supporting electrode is obtained by electrode...

Embodiment 1

[0052] A polypyrrole-modified Ag-Pd bimetallic composite electrocatalytic cathode, the specific preparation steps of which are as follows:

[0053] Step 1, the Ti sheet was polished with 100-grit sandpaper, and then decontaminated by ultrasonic cleaning in acetone, absolute ethanol and deionized water for 10 minutes, and then placed in a mixed solution of boiling hydrochloric acid: water = 1:2 for 15 minutes, Finally, it was cleaned with deionized water to obtain a Ti substrate.

[0054] Step 2, using water as a solvent, prepare a mixed solution containing 90 mmol / L of pyrrole, 3 mmol / L of sodium dodecyl benzene sulfonate, and 0.2 mmol / L of sulfuric acid as a deposition solution, using the titanium sheet obtained in step 1 as an anode, platinum The sheet is the cathode, and under the conditions of deposition current of 12mA and deposition time of 10min, the polypyrrole / Ti supporting electrode was obtained by electrodeposition.

[0055] Step 3, place the polypyrrole modified e...

Embodiment 2

[0060] A polypyrrole-modified Ag-Pd bimetallic composite electrocatalytic cathode, the specific preparation steps are as follows:

[0061] Step 1: Polish the Ti sheet with 100-grit sandpaper, then ultrasonically clean it in acetone, absolute ethanol and deionized water for 10 min to decontaminate, and then place it in a mixed solution of boiling concentrated hydrochloric acid: water = 1:2 for 15 min , and finally cleaned with deionized water to obtain a Ti substrate.

[0062]Step 2, using water as a solvent, prepare a mixed solution containing 95 mmol / L of pyrrole, 5 mmol / L of sodium dodecyl benzene sulfonate, and 0.3 mmol / L of sulfuric acid as a deposition solution, using the titanium sheet obtained in step 1 as an anode, platinum The sheet is the cathode, and under the conditions of deposition current of 13mA and deposition time of 11min, the polypyrrole / Ti supporting electrode was obtained by electrodeposition.

[0063] Step 3, place the polypyrrole modified electrode obta...

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Abstract

A polypyrrole-modified Ag-Pd bimetallic composite electrocatalytic cathode, the electrocatalytic cathode includes a substrate and a catalyst layer attached to the outer surface of the substrate, the substrate is made of a Ti sheet modified with polypyrrole on the outer surface, and the catalyst layer includes sequential deposition Ag and Pd on the substrate. The present invention prepares a polypyrrole-modified Ag-Pd bimetallic composite electrocatalytic cathode through a unique preparation process. The electrode has high catalytic activity, good stability, good effect in degrading and reducing chlorophenol wastewater, and low cost of raw materials. Better economic benefits. The technical problems of high price, poor stability, short service life and low catalyst efficiency in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of electrochemical water treatment, in particular to a polypyrrole-modified Ag-Pd bimetallic composite electrocatalytic cathode, a preparation method thereof, and an application thereof in the electrocatalytic degradation of refractory organics such as chlorophenol. Background technique [0002] Chlorinated organic compounds, especially chlorophenols (CPs) compounds are important chemical raw materials and intermediates, widely used in agriculture, medicine, polymer materials and other fields. Most chlorophenol compounds are highly toxic, difficult to biodegrade, have "three causes" (carcinogenic, teratogenic, mutagenic) effects and genotoxicity, and have a long degradation cycle. They are a typical type of persistent organic pollutants. [0003] Generally speaking, the more chlorine atoms in chlorophenol compounds, the more toxic they are and the more difficult they are to degrade. In recent years, electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/467C02F101/36
CPCC02F1/4678C02F2001/46142C02F2101/36
Inventor 魏学锋万晓阳苗娟张瑞昌勾明雷牛青山
Owner HENAN UNIV OF SCI & TECH
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