Titanium Sub-oxide/Ruthenium Oxide Composite Electrode
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Solution Overview
Problem
Current electrocatalytic oxidation electrodes, particularly those made of titanium dioxide and traditional ruthenium dioxide, suffer from low electrocatalytic activity and short service life due to their structure and surface cracking, limiting their efficiency in treating organic wastewater.
Innovation Solution
A titanium sub-oxide/ruthenium oxide composite electrode is developed, featuring titanium-based titanium sub-oxide nanotubes as the bottom layer and doped ruthenium oxide as the surface composite active layer, prepared through anodizing and electrodeposition processes to enhance surface area and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional ruthenium dioxide electrodes are prepared by brush preparation method, then the preparation process is simple, but the electrode surface has cracks and active coatings easily fall off, resulting in short service life
Solution Approach 1:
The patent creates a composite electrode structure by combining titanium sub-oxide nanotubes as the base layer with ruthenium oxide as the surface active layer. This composite structure prevents the cracking and coating detachment issues of traditional ruthenium dioxide electrodes while maintaining the simplicity of the preparation process through sequential deposition methods.
Solution Approach 2:
The patent utilizes titanium sub-oxide nanotubes with a porous structure as the base layer. This nanotube structure provides a crack-free foundation that prevents active coating detachment, while the high surface area of the porous structure enhances the electrocatalytic performance and extends service life.
2Stability of the object's composition
If titanium dioxide is used directly as anode material, then the material is stable, but the electrocatalytic oxidation activity is low and oxidation efficiency is poor
Solution Approach 1:
The patent changes the oxidation state of titanium from Ti(IV) in titanium dioxide to Ti(III) in titanium sub-oxide through cathodic electrochemical reduction. This parameter change in oxidation state transforms the material from low electrocatalytic activity to high electrocatalytic oxidation activity while maintaining the stable titanium-based structure.
Solution Approach 2:
The patent creates a composite structure where titanium sub-oxide nanotubes provide high electrocatalytic oxidation activity and stability, while the doped ruthenium oxide surface layer enhances the oxidation capacity. This composite approach overcomes the low efficiency of pure titanium dioxide while maintaining material stability.
3Reliability
If titanium sub-oxide is used as anode material, then the electrocatalytic oxidation property is good, but the material oxidizes itself and service life is short
Solution Approach 1:
The patent creates a composite structure where titanium sub-oxide nanotubes provide high electrocatalytic oxidation activity, while the outer ruthenium oxide layer protects the titanium sub-oxide from self-oxidation. This composite structure maintains the excellent electrocatalytic properties while preventing material degradation and extending service life.
Solution Approach 2:
The ruthenium oxide surface layer acts as a protective intermediary between the titanium sub-oxide and the oxidizing environment. This intermediary layer allows the titanium sub-oxide to maintain its high electrocatalytic oxidation property while preventing direct oxidation of the titanium sub-oxide, thus extending service life.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite electrode exhibits improved electrocatalytic activity and significantly prolonged service life, achieving high COD removal rates in wastewater treatment, with enhanced durability and efficiency.
Implementation Method 1
anodizing a titanium substrate in a fluorine-containing ionic electrolyte
Implementation Method 2
anodizing a titanium substrate in a fluorine-containing ionic electrolyte
Implementation Method 3
performing cathodic electrochemical reduction in polarizing liquid
Implementation Method 4
performing electrodeposition in a ruthenium trichloride electrolyte doped with titanium sub-oxide powder
Implementation Method 5
heating and roasting the titanium substrate
Implementation Method 6
heating and roasting the titanium substrate
Data Source
AI summary
A titanium sub-oxide/ruthenium oxide composite electrode and a preparation method and application thereof. Titanium-based titanium sub-oxide nanotubes is taken as a bottom layer, and titanium sub-oxide doped ruthenium oxide is taken as a surface composite active layer. A titanium substrate is anodized in a fluorine-containing ionic electrolyte, taken out, subjected to heating and roasting, cooled and then subjected to cathodic electrochemical reduction in polarizing liquid, so that a titanium-based titanium sub-oxide nanotube electrode is obtained; and then the titanium-based titanium sub-oxide nanotube electrode is taken as a cathode to be electrodeposited in a ruthenium trichloride electrolyte doped with titanium sub-oxide powder, taken out and then subjected to heating and roasting, so that the titanium sub-oxide/ruthenium oxide composite electrode is obtained.