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Preparation method and application of amorphous composite electrode for electrocatalytic dechlorination

A composite electrode and amorphous technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problems of low electrode stability, large electrode catalyst loading, high cost, etc., and achieve multiple surface defects , high catalytic activity and stability

Active Publication Date: 2019-03-29
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems that the existing electrode catalysts for electrocatalytic reduction dechlorination have large loading capacity, low electrode stability, high cost and difficulty in wide application, the present invention provides an amorphous composite electrode for electrocatalytic dechlorination The preparation method and the method for treating chlorinated organic matter in water, the amorphous composite electrode prepared by the method has the advantages of good conductivity, high catalytic activity, low cost and good stability

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  • Preparation method and application of amorphous composite electrode for electrocatalytic dechlorination
  • Preparation method and application of amorphous composite electrode for electrocatalytic dechlorination
  • Preparation method and application of amorphous composite electrode for electrocatalytic dechlorination

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Embodiment 1

[0032] 1. Preparation of amorphous composite electrode

[0033] Foam Ni (20mm×25mm) was put into 0.5mol / L hydrochloric acid and ultrasonically oscillated for 5min to remove impurities. After rinsing with distilled water, put it into absolute ethanol for 10min sonication. After rinsing, ultrasonically 3 times with distilled water and then dried. Weigh 0.20g of RuCl 3 After the powder and 10mL of pyrrole are fully dissolved, the volume is adjusted to a 500ml volumetric flask to make a solution containing N-RuCl 3 Mix the electrolyte solution. The pretreated foamed Ni electrode was used as the cathode, the platinum sheet was used as the anode, and the N-RuCl 3 The solution is an electrolyte, and the current density is 0.2mA / cm 2 , Electrodeposition for 40min, then electrochemical deposition made amorphous Ru-N / foam nickel electrode. like figure 1 Shown is a schematic diagram of the preparation device for the amorphous composite electrode.

[0034] figure 2 It is the SEM i...

Embodiment 2

[0040] 1. Preparation of amorphous composite electrode

[0041] Soak foamed nickel (20mm×25mm) in 0.5mol / L sulfuric acid and sodium hydroxide solution and oscillate for 5 minutes to remove impurities. Rinse with distilled water and put it in absolute ethanol for 10 minutes. After rinsing, use distilled water to sonicate 3 times Then dry. Weigh 0.1gPdCl 2 Dissolve the powder in water, add a small amount of hydrochloric acid to make PdCl 2 Completely dissolve, then add 3.551g of anhydrous sodium sulfate and 2-5g of boric acid, after fully dissolving, set the volume to 500ml to form a mixed solution with different boron content. The pretreated nickel foam is used as the cathode, the platinum sheet is used as the anode, and the PdCl 2 -B solution is the electrolyte, the current density is 0.2mA / cm 2 , Electrodeposited for 40min, then the Pd-B / foam nickel amorphous composite electrode was prepared by electrochemical deposition.

[0042] Image 6 It is the SEM picture of the amo...

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Abstract

The invention relates to a preparation method and an application of an amorphous composite electrode for electrocatalytic dechlorination, and belongs to the technical field of electrochemical water treatment. The purpose of the invention is to solve the problems of high load, poor electrode stability and high cost of electrode catalysts for electrocatalytic reduction and dechlorination. The preparation method comprises the following steps: pretreatment of a matrix; and preparation of the amorphous composite electrode in a three-electrode electrochemical system under constant current conditionsunder the assistance of ultrasonic waves with the pretreated matrix as the working electrode, NaSO4 as the electrolyte and a noble metal salt and a non-noble metal salt containing N, B or P as a reaction liquid. A method for electrocatalytic reduction and dechlorination treatment of chlorinated organic compounds in water is characterized in that the amorphous composite electrode is used as the working electrode, a Pt piece is used as the counter electrode, a saturated calomel electrode is used as the reference electrode, a constant voltage mode is adopted, a H2SO4 solution is adopted as the anodolyte, and NaSO4 is adopted as the catholyte. The amorphous composite electrode prepared in the invention has the advantages of good conductivity, high catalytic activity, low cost and good stability.

Description

technical field [0001] The invention belongs to the technical field of electrochemical water treatment, and in particular relates to a preparation method and application of an amorphous composite electrode for electrocatalytic dechlorination. Background technique [0002] Most of the chlorinated organic compounds are toxic, and have a stable structure, long half-life, and are difficult to degrade in the natural environment. The key step for detoxification and destruction decomposition is dechlorination. Electrocatalytic reduction dechlorination is a relatively clean and efficient treatment method. The electrode used for electrocatalytic reduction dechlorination mainly loads crystalline noble metal Pd on different substrates, such as Pd / activated carbon electrode, Pd / Ti electrode, Pd / polypyrrole / Ni electrode, etc., but there is a large amount of catalyst loading (2mg / cm 2 , Electrochemical Society, 150 (2) D17-D24 (2003), Electrochimica Acta 69 (2012) 389–396), the problem...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F101/36
CPCC02F1/4676C02F2101/36
Inventor 崔春月王婧郑庆柱辛言君马东张雪
Owner QINGDAO AGRI UNIV
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