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CA scanning assisted preparation method and applications of Pd-Cu/Ti electrode

An electrode, cuso4·5h2o technology, which is applied in the field of pentachlorophenol (PCP) dechlorination, can solve the problems such as the preparation of Pd-Cu/Ti electrodes that are not assisted by CV scanning, and the different purposes of use, etc., to increase the electrode surface area and Electrocatalytic active sites, fast dechlorination, and high dechlorination efficiency

Active Publication Date: 2013-10-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Documents ①, ②, and ③ all prepare nano-scale palladium-copper alloy catalysts. Compared with the above-mentioned documents, although they are all Pd-Cu alloys, they do not involve the preparation of CV scanning-assisted Pd-Cu / Ti electrodes and the CV The purpose of scanning auxiliary Pd-Cu / Ti electrodes is also different from them

Method used

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  • CA scanning assisted preparation method and applications of Pd-Cu/Ti electrode
  • CA scanning assisted preparation method and applications of Pd-Cu/Ti electrode
  • CA scanning assisted preparation method and applications of Pd-Cu/Ti electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) palladium chloride (PdCl 2 ) powder was dissolved in 3M hydrochloric acid (the concentration of palladium chloride is 1g palladium chloride / 100ml hydrochloric acid), diluted with deionized water to obtain 15mM PdCl 2 solution.

[0026] 2) Take 50mL of the palladium chloride solution in step 1), add 0.0625g CuSO to it 4 ·5H 2 O, stir evenly.

[0027] 3) Add NaOH to the mixed solution in step 2) to adjust the pH to 1.0.

[0028] 4) With the titanium mesh (2cm×2cm) as the cathode and the platinum sheet as the anode, a constant potential of -0.9V (relative to Hg / Hg 2 SO 4 Electrodes) were deposited in the solution in step 3) for 25min.

[0029] 5) The Pd-Cu / Ti electrode prepared in step (4) was heated in 0.5M H 2 SO 4 Carry out CV scanning in the medium, the potential scanning range is -800mV~700mV, the scanning speed is 50mV / s, scanning 20 circles, get CV20Pd-Cu / Ti electrode.

[0030] Add 30mL10mg / L PCP and 0.13g Na to the cathode chamber of the reactor 2 SO ...

Embodiment 2

[0033] 1) palladium chloride (PdCl 2 ) powder was dissolved in 3M hydrochloric acid (the concentration of palladium chloride is 1g palladium chloride / 100ml hydrochloric acid), diluted with deionized water to obtain 15mM PdCl 2 solution.

[0034] 2) Take 50mL of the palladium chloride solution in step 1), add 0.0625g CuSO to it 4 ·5H 2 O, stir evenly.

[0035] 3) Add NaOH to the mixed solution in step 2) to adjust the pH to 1.0.

[0036]4) With the titanium mesh as the cathode and the platinum sheet as the anode, a constant potential of -0.9V (relative to Hg / Hg 2 SO 4 electrode) in step 3) solution, deposited for 25min.

[0037] 5) The Pd-Cu / Ti electrode prepared in step (4) was heated in 0.5M H 2 SO 4 Carry out CV scanning in the medium, the potential scanning range is -800mV~700mV, the scanning speed is 50mV / s, scan 50 circles, obtain CV50Pd-Cu / Ti electrode.

[0038] Add 30mL10mg / L PCP and 0.13g Na to the cathode chamber of the reactor 2 SO 4 , add 30mL0.03M Na to ...

Embodiment 3

[0041] 1) palladium chloride (PdCl 2 ) powder was dissolved in 3M hydrochloric acid (the concentration of palladium chloride is 1g palladium chloride / 100ml hydrochloric acid), diluted with deionized water to obtain 15mM PdCl 2 solution.

[0042] 2) Take 50mL of the palladium chloride solution in step 1), add 0.0625g CuSO to it 4 ·5H 2 O, stir evenly.

[0043] 3) Add NaOH to the mixed solution in step 2) to adjust the pH to 1.0.

[0044] 4) With the titanium mesh as the cathode and the platinum sheet as the anode, a constant potential of -0.9V (relative to Hg / Hg 2 SO 4 electrode) in step 3) solution, deposited for 25min.

[0045] 5) The Pd-Cu / Ti electrode prepared in step (4) was heated in 0.5M H 2 SO 4 Carry out CV scanning in the medium, the potential scanning range is -800mV~700mV, the scanning speed is 50mV / s, scanning 65 circles, get CV65Pd-Cu / Ti electrode.

[0046] Add 30mL10mg / L PCP and 0.13g Na to the cathode chamber of the reactor 2 SO 4 , add 30mL0.03M Na t...

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Abstract

The invention discloses a CA scanning assisted preparation method and applications of a Pd-Cu / Ti electrode, and belongs to the field of electrochemical water treatment technologies. The CA scanning assisted preparation method comprises following steps: firstly, preparing a PdCl2 solution containing CuSO4, and adjusting the pH value of the solution to 1.0; taking a titanium mesh as a cathode, and a platinum sheet as an anode, and performing deposition with a constant potential so as to obtain the Pd-Cu / Ti electrode, wherein the constant potential relative to the potential of a Hg / Hg2SO4 electrode is -0.9V; and then subjecting the Pd-Cu / Ti electrode to CV scanning in a H2SO4 solution of 0.5M, wherein the potential scanning range is -800mV to 700mV, the scanning speed is 50Mv / S, and the scanning circles are 1 to 65. The Pd-Cu / Ti electrode can be used for electrocatalytic reductive dechlorination of PCP, and the reaction solution is close to neutral after the reaction by controlling an initial pH value, so that it is convenient for subsequent processing.

Description

technical field [0001] The invention assists in the preparation of a high specific surface Pd-Cu / Ti electrode by means of cyclic voltammetry (CV) and uses the electrode for dechlorination of pentachlorophenol (PCP), belonging to the technical field of electrochemical water treatment. Background technique [0002] Chlorophenols are a class of highly toxic and refractory biodegradable substances, which are extremely harmful to the environment. The technology of dechlorination can greatly reduce its harm to the environment. There are currently two main research directions for dechlorination: one is catalytic hydrodechlorination (HDC), using nano-catalysts such as Pd / Fe, Pd / SiO 2 etc. to replace the chlorine in chlorophenol; the second is electrocatalytic hydrogenation reduction dechlorination (ECH), depositing palladium and other substances on the surface of the substrate material, such as Pd / foam nickel electrode, Pd / Ti electrode. Catalysts in both research directions revolv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C02F1/461
Inventor 孙治荣沈海涛魏学锋
Owner BEIJING UNIV OF TECH
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