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Method for preparing anode-catalyzed electrode for electrolyzing slurry coal

A catalytic electrode and anode technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of short service life of electrodes, unsuitable for large-scale application, low catalytic activity, etc., and achieve extended service life, high stability, and improved The effect of catalytic activity

Inactive Publication Date: 2010-06-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the electrolysis of coal under alkaline conditions, the anode catalytic electrodes used are metal electrodes such as copper, nickel, lead, and platinum, but their catalytic activity is not high, and it is not suitable for large-scale application. During use, it is easy to be corroded, and the service life of the electrode is not long

Method used

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  • Method for preparing anode-catalyzed electrode for electrolyzing slurry coal
  • Method for preparing anode-catalyzed electrode for electrolyzing slurry coal
  • Method for preparing anode-catalyzed electrode for electrolyzing slurry coal

Examples

Experimental program
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Effect test

Embodiment 1

[0032] This embodiment is the preparation of Ti / Pt-CO3O4 anode catalytic electrode, and its preparation steps are as follows:

[0033] (1) Pretreatment of the electrode metal titanium substrate: first, polish it with metal phase sandpaper from coarse to fine until it is bright and uniform; rinse it with deionized water, and then ultrasonically clean it in ethanol or acetone to remove oil stains, and then use Rinse with deionized water, then use 4% HF to remove oxide impurities, then rinse with hot double distilled water and place in ethanol for later use;

[0034] (2) Electrodeposition of metal on the metal titanium substrate: in the electrolytic cell, the platinum plate electrode is used as the anode, and the above-mentioned treated metal titanium substrate is used as the working electrode; the catalytic layer electrodeposition is carried out on the metal titanium substrate; the catalytic layer Electrode deposition adopts step-by-step constant current deposition; the steps ar...

Embodiment 2

[0039] This embodiment is the preparation of the anode catalytic electrode of Ti / Pt-NiO, and its preparation steps are as follows:

[0040] (1) The pretreatment of the metal titanium substrate is the same as that of the above-mentioned embodiment 1.

[0041] (2) Electrodeposition of the metal on the metal titanium substrate is exactly the same as that of the above-mentioned embodiment 1. The difference is that in the second step, nickel is redeposited, and the electroplating solution used is a mixed solution of nickel sulfate heptahydrate with a concentration of 200g / L, boric acid of 30g / L and sodium chloride of 15g / L.

[0042](3) The pre-heating treatment and post-heating treatment after metal electrodeposition on the metal titanium substrate are exactly the same as those in the above-mentioned embodiment 1.

[0043] Ti / Pt-NiO was finally prepared as a titanium-based anode catalytic electrode.

Embodiment 3

[0045] This embodiment is Ti / Pt-CO 3 o 4 -The preparation of NiO anode catalytic electrode, its preparation steps are as follows:

[0046] (1) The pretreatment of the metal titanium substrate is the same as that of the above-mentioned embodiment 1.

[0047] (2) Electrodeposition of the metal on the metal titanium substrate is exactly the same as that of the above-mentioned embodiment 1. The difference is: in the second step, two metals, cobalt and nickel, are simultaneously deposited; A mixed solution of boric acid and 15g / L sodium chloride.

[0048] (3) The pre-heating treatment and post-heating treatment after metal electrodeposition on the metal titanium substrate are exactly the same as those in the above-mentioned embodiment 1.

[0049] Ti / Pt-CO 3 o 4 -NiO.

[0050] The instrument detection result that above-mentioned embodiment product is done, has done the detection and the test of I-V change characteristic etc. when SEM, XRD and electrolytic coal slurry are done...

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Abstract

The invention relates to a method for preparing an anode-catalyzed electrode for electrolyzing slurry coal, i.e. a method for preparing an alloy electrode of which the metallic titanium base material is coated with cobalt and nickel oxides and platinum, belonging to the technical field of chemical material preparation process. The method comprises the following steps of: (1) pretreating a metallic titanium substrate; (2) generating a platinum-cobalt-nickel alloy catalyst layer on the titanium substrate by a constant-current and stepped electrolytic deposition method; and (3) after the electrolytic deposition of the metal on the titanium substrate, heat-pretreating in an oven and heat-posttreating in a muffle furnace with a treating temperature of 400-600 DEG C. The main electrolytic deposition process is carried out in an electrolytic bath, and main salts for depositing platinum, cobalt and nickel are respectively H2PtCl6.6H2O, CoSO4.6H2O and NiSO4.7H2O. Ti / Pt-CO3O4, Ti / Pt-NiO and Ti / Pt-CO3O4-NiO catalyzed electrodes prepared by the method can provide the current density and the current efficiency in the electrolytic process and have higher catalytic activity.

Description

technical field [0001] The invention relates to a method for preparing an anode catalytic electrode for electrolytic coal slurry, that is, a method for preparing an alloy electrode coated with cobalt-nickel oxide and platinum on a metal titanium substrate, belonging to the technical field of electrochemical material preparation technology . Background technique [0002] Coal electrolysis utilization technology has been reported since the middle of the 20th century, but its development has been hindered due to low efficiency. It was not until 1979 that Coughlin and Farooque published an article on hydrogen production by coal electrolysis in journals such as Nature that the research in this area had great development. He found that in acidic medium, the cell voltage for hydrogen production by electrolysis of coal slurry is only half of the voltage of the cell for hydrogen production by electrolysis of water, which greatly reduces the energy consumption of the whole process. ...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B11/10
Inventor 印仁和赵永刚刘怀有王昊民曹为民
Owner SHANGHAI UNIV
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