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A preparation method and application of an amorphous composite electrode for electrocatalytic dechlorination

A composite electrode, amorphous technology, applied in chemical instruments and methods, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problem of low electrode stability and large loading capacity of electrode catalysts , high cost and other issues, to achieve the effect of many surface defects, high catalytic activity and stability

Active Publication Date: 2021-06-11
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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  • A preparation method and application of an amorphous composite electrode for electrocatalytic dechlorination
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  • A preparation method and application of an amorphous composite electrode for electrocatalytic dechlorination

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Embodiment 1

[0032] 1. Preparation of amorphous composite electrodes

[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. Such as figure 1 Shown is a schematic diagram of the preparation device for the amorphous composite electrode.

[0034] figure 2 It is the S...

Embodiment 2

[0040] 1. Preparation of amorphous composite electrode

[0041] Soak nickel foam (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 to sonicate. 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] Figure 6 It is the SEM image o...

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Abstract

The invention relates to a preparation method and application of an amorphous composite electrode for electrocatalytic dechlorination, which belongs to the technical field of electrochemical water treatment, and aims to solve the problem that the electrode catalyst load for electrocatalytic reduction dechlorination is large and the electrode The problem of low stability and high cost. The preparation method comprises the following steps: substrate pretreatment; in a three-electrode electrochemical system, the pretreated substrate is used as a working electrode, and NaSO 4 As an electrolyte, a noble metal salt and a non-noble metal salt containing N, B or P are used as a reaction solution, and the amorphous noble metal composite electrode is prepared under the condition of constant current under the assistance of ultrasonic waves. The method of electrocatalytic reduction dechlorination to treat chlorinated organic compounds in water: the above-mentioned amorphous composite electrode is used as the working electrode, the Pt sheet is used as the counter electrode, and the saturated calomel electrode is used as the reference electrode. In the constant voltage mode, the anode electrolyte is H 2 SO 4 solution, the catholyte uses NaSO 4 . The amorphous compound electrode prepared by the invention has good electrical 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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Patent Type & Authority Patents(China)
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