Titanium anode containing ruthenium coating of high cerium content and its preparing method

A titanium anode and content technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of difficult control of oxide non-stoichiometric ratio, unclear contribution of electrocatalytic performance, uneven structure of coating, etc., to achieve operation Convenience, low electrode potential for chlorine evolution, and fine grain structure

Inactive Publication Date: 2007-01-24
FUZHOU UNIV
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AI Technical Summary

Problems solved by technology

During the preparation process of the thermal decomposition method, due to the inhomogeneous structure of the coating and the difficulty in controlling the non-stoichiometric ratio of oxides caused by the preparation method, it is difficult to control the performance of the coating.
In addition, the added CeO 2 The small amount leads to unclear contribution to the electrocatalytic performance

Method used

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  • Titanium anode containing ruthenium coating of high cerium content and its preparing method
  • Titanium anode containing ruthenium coating of high cerium content and its preparing method
  • Titanium anode containing ruthenium coating of high cerium content and its preparing method

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preparation example Construction

[0022] The preparation method steps of the ruthenium-containing coated titanium anode with high cerium content of the present invention are as follows:

[0023] e. Titanium-based pretreatment, that is, the titanium substrate is deesterified, degreased, pickled and etched with a cleaning agent;

[0024] f. Preparation of unit coating solution, including: preparation of CeO 2 Sol: Ce(NO 3 ) 3 ·6H 2 In the absolute ethanol solution of O, add the mixed solution of non-precipitating citric acid and ethylene glycol drop by drop, stir well; prepare RuO 2 Sol: heating, stirring RuCl without precipitation 3 ·3H 2 O ethanol solution, and at the same time, drop by drop the mixed solution of citric acid and ethylene glycol without precipitation, and keep it warm for more than 3 hours under the environment of 50~80°C;

[0025] g. Multi-component coating solution preparation, the CeO prepared in the above step b 2 and RuO 2 Mix the unit coating solution, continue to stir for more th...

Embodiment 1

[0031] A 20mm×40mm titanium plate (Tal) was degreased by alkaline washing powder, put into 10% (mass fraction) oxalic acid solution, boiled for 2 hours, taken out, rinsed with distilled water and dried, then put into ethanol solution for later use. Weigh a certain amount of Ce(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of absolute ethanol, and a mixed solution of citric acid and ethylene glycol was added drop by drop, fully stirred; a certain amount of RuCl was weighed 3 ·3H 2 O was put into a beaker, diluted with an appropriate amount of ethanol immediately, heated and stirred, and at the same time, a mixed solution of citric acid, ethylene glycol and nitric acid was dropped at a rate of 1 drop / second, and kept at 60°C for more than 3 hours. Form the above into CeO 2 and RuO 2 The solutions were mixed according to the required molar ratio (see Table 1), continued to stir for more than 3 hours, and stood still for 24h. The above-mentioned coating solution wa...

Embodiment 2

[0034] A 20mm×40mm titanium plate (Tal) was degreased by alkaline washing powder, put into 10% (mass fraction) oxalic acid solution, boiled for 2 hours, taken out, rinsed with distilled water and dried, then put into ethanol solution for later use. Weigh a certain amount of Ce(NO 3 ) 3 ·6H 2 O was dissolved in an appropriate amount of absolute ethanol, and a mixed solution of citric acid and ethylene glycol was added drop by drop, fully stirred; a certain amount of RuCl was weighed 3 ·3H 2 O was put into a beaker, diluted with an appropriate amount of ethanol immediately, heated and stirred, and at the same time, a mixed solution of citric acid, ethylene glycol and nitric acid was dropped at a rate of 1 drop / second, and kept at 60°C for more than 3 hours. Weigh a certain amount of SnCl 2 2H 2 O was dissolved in an appropriate amount of absolute ethanol, and the mixed solution of citric acid and ethylene glycol was added drop by drop, and fully stirred. Form the above int...

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Abstract

The present invention provides a high cerium content ruthenium coating contained titanium anode preparation method. Said ruthenium coating containing titanium anode includes titanium basal body, featuring said titanium basal body surface coating RuO 2 and CeO 2 ratio as 1 : 3-3 :1.Said preparation method includes using RuCl 3 H2 O, Ce(No3)3 as source substance, including titanium base preprocessing, unit coating liquid preparation, multielement coating liquid preparation and coating preparation. The present invention has simple technology, convenient operating, fine coated grain structure, and low chlorine separating potential.

Description

technical field [0001] The invention relates to a ruthenium-containing coated titanium anode with high cerium content for electrolysis of chlorine in aqueous solution and a preparation method thereof. Background technique [0002] Noble metal oxide-coated titanium anode (referred to as titanium anode) is a very important electrocatalytic functional electrode material. In order to reduce the chlorine evolution potential, the research on changing the coating formula has never been interrupted. From the analysis point of view, the active oxide RuO 2 is essential and the most suitable electrocatalytic center, TiO 2 It is considered to be the most suitable electrocatalytic support material. Derek pointed out that one mechanism for obtaining effective catalysis is that the properties of the catalyst center change during the reaction, resulting in a decrease in the strength of the oxide adsorption bond, so it can be predicted that the oxide formed by the rare earth element Ce wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/08C25B11/10
Inventor 唐电邵艳群张腾王小康
Owner FUZHOU UNIV
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