Rare-earth doped titanium-base SnO2 electrolytic electrode and its preparation

A technology of rare earth doping and electrocatalysis, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor catalytic degradation ability, easy falling off, low specific surface area, etc., and achieve improved current efficiency, reduced power consumption, and organic matter The effect of strong degradability

Active Publication Date: 2007-01-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The currently used DSA electrode has low oxygen evolution potential and poor catalytic degradation ability for organic matter. The electrocatalytic performance of the electrode cannot meet the actual needs of wastewater treatment, and the surface coating of the electrode is not dense, easy to fall off, and has a low specific surface area. Active components are not stable, easy to precipitate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0012] Specific implementation mode 1: The rare earth-doped titanium-based SnO in this implementation mode 2 Electrocatalytic electrode composed of titanium matrix and rare earth doped SnO 2 Coating composition, in which rare earth doped SnO 2 The molar ratio of Sn, rare earth and Sb in the coating is 75-99.8:0.1-10:0.1-15.

[0013] In this embodiment, the rare earth is one or a mixture of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy.

specific Embodiment approach 2

[0014] Specific Embodiment 2: The difference between this embodiment and Specific Embodiment 1 is that the rare earth doped SnO 2 The molar ratio of Sn, rare earth and Sb in the coating is 75:10:15.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the rare earth doped SnO 2 The molar ratio of Sn, rare earth and Sb in the coating is 99.8:0.1:0.1.

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PUM

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Abstract

A rare earth-doped Ti-base SnO2 electrocatalytic electrode relates to one type of DSA electrode and its preparing process. The rare earth-doped electrode in this invention is composed of the Titanium substrate and the rare earth-doped SnO2 coat in which the mol ratio of Sn, rare earth elements and Sb is 75-99.8:0.1-10:0.1-15. In this process the Titanium electrode is polished, washed with alkaline and acid, then undergoes delaminated impregnation and gradient temperature rise to realize the formation of the functionally gradient membrane that endows the electrode with relatively high potential of oxygen evolution, strong degrading ability of organic compounds and inert composition without dissolving out. The electrode has strong degrading ability especially of the materials persistent to biodegration or toxic to organisms.

Description

technical field [0001] The invention relates to an electrocatalytic (DSA) electrode and a preparation method thereof. Background technique [0002] The currently used DSA electrode has low oxygen evolution potential and poor catalytic degradation ability for organic matter. The electrocatalytic performance of the electrode cannot meet the actual needs of wastewater treatment, and the surface coating of the electrode is not dense, easy to fall off, and has a low specific surface area. Active components are not Stable and easy to precipitate. It is generally used in sulfuric acid and chlor-alkali industries, and its main function is to analyze oxygen and chlorine. Contents of the invention [0003] The object of the present invention is to provide a rare earth doped SnO 2 Composition and preparation method of electrocatalytic electrode. The electrode is doped with rare earth, which increases the effective content of the active components of the electrocatalytic electrode....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B11/10
Inventor 冯玉杰崔玉虹刘峻峰
Owner HARBIN INST OF TECH
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