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Improved Ru-Ce coated electrode

A coating electrode, ru-ce technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of low hydrogen evolution potential, serious weight loss rate of coating, whitening and other problems

Inactive Publication Date: 2018-12-14
JIANGYIN ANCAN ELECTROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

with Raney Nickel, RuO 2 , NiO-RuO 2 Compared with the Ru-Ce coated electrode, the active cathode material has a lower hydrogen evolution potential, which is beneficial to energy saving and consumption reduction. However, the coating weight loss rate of the coated electrode is serious in practical applications, and the coating has the same marks as water stains. It may cause color difference such as whitening and flowering in some places

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0018] A preferred embodiment: first dissolve the precursor compounds of ruthenium, cerium and silver in a solvent to obtain a coating solution, and then apply the coating solution on the surface of the electrode substrate. The solvent can be water or n-butanol.

[0019] A preferred embodiment: the precursor compound of ruthenium is ruthenium nitrate or ruthenium trichloride, the precursor compound of cerium is cerium nitrate or cerium chloride, and the precursor compound of silver is silver nitrate.

[0020] Preferred embodiment: the sintering temperature is 400-600° C., and the time is 5-60 minutes.

[0021] In the air atmosphere, the precursor compounds of ruthenium and cerium are decomposed and oxidized by high temperature to generate corresponding ruthenium oxide and cerium oxide, and the precursor compound of silver is decomposed into simple silver (silver oxide will decompose rapidly above 300°C).

[0022] The loading capacity of the present invention is relative to th...

Embodiment 1

[0024] Preparation of Ru-Ag-Ce coated electrodes:

[0025] According to the mass ratio of Ru:Ag:Ce = 10:2.25:2.25, dissolve ruthenium trichloride, silver nitrate and cerium nitrate in water, mix them evenly to obtain a coating solution, and then apply the coating solution to a conventional nickel mesh electrode Substrate, the coating amount of each coating solution is about 15 ~ 25ml / m 2 After coating, dry at 150°C for 5 minutes, then fire at 600°C (air) for 5 minutes, and repeat the coating until the Ru load = 10.0g / m 2 , Ag load = 2.25g / m 2 , Ce load = 2.25g / m 2 .

Embodiment 2

[0027] Preparation of Ru-Ag-Ce coated electrodes:

[0028] According to the mass ratio of Ru:Ag:Ce = 8:2.5:2.5, dissolve ruthenium trichloride, silver nitrate and cerium nitrate in water, mix them evenly to obtain a coating solution, and then apply the coating solution to a conventional nickel mesh electrode Substrate, the coating amount of each coating solution is about 15 ~ 25ml / m 2 After coating, dry at 150°C for 5 minutes, then fire at 600°C (air) for 5 minutes, and repeat the coating until the Ru load = 8.0g / m 2 , Ag load = 2.5g / m 2 , Ce load = 2.5g / m 2 .

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PUM

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Abstract

The invention discloses an improved Ru-Ce coated electrode. The coated electrode comprises an electrode base and a Ru-Ce coating covering the surface of the electrode base; elements Ru and Ce exist inthe form of oxides. The coated electrode is characterized in that the Ru-Ce coating comprises an element A9 and / or graphene. By adding the element A9 and / or the graphene in the conventional Ru-Ce coating, the invention significantly improves the weightlessness resistance of the conventional Ru-Ce coated electrode and simultaneously improves the chromatic aberration of the conventional Ru-Ce coating.

Description

technical field [0001] The invention belongs to the field of electrode materials, in particular to an improved Ru-Ce coating electrode. Background technique [0002] The Ru-Ce coating electrode is the cathode for electrolysis that has been used in industry. It is mainly used in the cathode for electrolysis in the chlor-alkali industry and in ion-exchange membrane electrolysis devices. The coated electrode is on the surface of the electrode substrate (usually nickel or nickel alloy) A Ru-Ce coating in oxide form is applied. with Raney Nickel, RuO 2 , NiO-RuO 2 Compared with the Ru-Ce coated electrode, the active cathode material has a lower hydrogen evolution potential, which is beneficial to energy saving and consumption reduction. However, the coating weight loss rate of the coated electrode is serious in practical applications, and the coating has the same marks as water stains. It may cause color difference such as whitening and flowering in some places. Contents of ...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B1/46
CPCC25B1/46C25B11/093
Inventor 胡媛媛
Owner JIANGYIN ANCAN ELECTROCHEM EQUIP
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