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Polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode as well as preparation method and application

A polypyrrole, electrocatalysis technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of expensive electrocatalytic cathode, low catalyst efficiency, short service life, etc., to achieve electrocatalytic Good reduction and degradation effect, strong binding force, and the effect of improving catalytic performance

Active Publication Date: 2018-06-22
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • 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 double-metal compound electro-catalytic cathode as well as preparation method and application
  • Polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode as well as preparation method and application
  • Polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode as well as 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: Polish the Ti sheet with 100-mesh sandpaper, then ultrasonically clean it in acetone, absolute ethanol and deionized water for 10 minutes to decontaminate, and then place it in a mixed solution of boiling concentrated hydrochloric acid and water with a volume ratio of 1:2 15 min, and finally cleaned with deionized water to obtain a Ti matrix.

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

[0042] S...

Embodiment 1

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

[0053] Step 1: Polish the Ti sheet with 100-mesh sandpaper, then ultrasonically clean it in acetone, absolute ethanol, and deionized water for 10 minutes to decontaminate, then place it in a mixed solution of boiling hydrochloric acid: water = 1:2 for 15 minutes, and finally Wash it with deionized water to obtain a Ti matrix.

[0054] Step 2, using water as a solvent, prepare a mixed solution containing 90mmol / L of pyrrole, 3mmol / L of sodium dodecylbenzenesulfonate, and 0.2mmol / L of sulfuric acid as a deposition solution, and use 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, polypyrrole / Ti supporting electrode is obtained by electrodeposition.

[0055] Step 3, place the polypyrrole modified electrode obtained in st...

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-mesh sandpaper, then ultrasonically clean it in acetone, absolute ethanol, and deionized water for 10 minutes to decontaminate, and then place it in a mixed solution of boiling concentrated hydrochloric acid: water = 1:2 for 15 minutes. Finally, it was cleaned with deionized water to obtain a Ti matrix.

[0062]Step 2, using water as a solvent, prepare a mixed solution containing 95mmol / L of pyrrole, 5mmol / L of sodium dodecylbenzenesulfonate, and 0.3mmol / L of sulfuric acid as a deposition solution, and use 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, polypyrrole / Ti supporting electrode is obtained by electrodeposition.

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

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Abstract

The invention provides a polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode. The electro-catalytic cathode comprises a matrix and a catalyst layer attached to the outer surfaceof the matrix, wherein the matrix is prepared from a Ti sheet with a polypyrrole modified outer surface; the catalyst layer comprises Ag and Pd, which are deposited on the matrix in sequence. The polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode is prepared through a unique reparation technology provided by the invention; the cathode has the advantages of high catalytic activity, good stability, good chlorophenol wastewater degradation and reduction effect and low raw material cost, and has relatively good economic benefits. The technical problems of an electro-catalytic cathode in the prior art that the price is expensive, the stability is poor, the service life is short, the efficiency of a catalyst is not high and the like 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 Applications(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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