Electrolysis Anode Catalyst Layer Uniformity
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Solution Overview
Problem
Current anodes for brine electrolysis exhibit high overvoltage and limited lifetime, which hampers their efficiency and long-term use in commercial applications.
Innovation Solution
An anode with a catalyst layer containing ruthenium oxide, iridium oxide, palladium oxide, and titanium oxide, formed through electrostatic spray deposition, ensuring uniform distribution of active materials and reduced overvoltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mixed oxide catalyst layer of ruthenium, iridium, and titanium is used as the anode, then excellent chlorine generating reaction activity and stability are achieved, but high overvoltage occurs and energy consumption increases
Solution Approach 1:
The patent applies composite materials by combining ruthenium oxide (40-70 wt%), iridium oxide (5-30 wt%), and titanium oxide (5-30 wt%) in a specific composition ratio to form a catalyst layer that achieves both high stability and low overvoltage. This composite structure allows the anode to maintain excellent chlorine generating reaction activity while reducing energy consumption compared to conventional single-metal or binary oxide anodes.
Solution Approach 2:
The patent implements parameter changes by precisely controlling the composition ratios of ruthenium oxide (40-70 wt%), iridium oxide (5-30 wt%), and titanium oxide (5-30 wt%) in the catalyst layer. By optimizing these compositional parameters, the anode achieves reduced overvoltage and lower energy consumption while maintaining high stability and chlorine generating activity.
2Reliability
If a mixed oxide catalyst layer of ruthenium, iridium, and titanium is used as the anode, then excellent chlorine generating reaction activity and stability are achieved, but the anode is limited for long-term use
Solution Approach 1:
The patent uses composite materials comprising ruthenium oxide (40-70 wt%), iridium oxide (5-30 wt%), and titanium oxide (5-30 wt%) to create a catalyst layer that enhances both stability and lifetime. The synergistic effect of these three metal oxides in specific proportions improves the anode's durability for long-term operation while maintaining high chlorine generating activity.
Solution Approach 2:
The patent extends lifetime through parameter changes by optimizing the compositional ratios of the catalyst layer components. The specific composition range (ruthenium oxide 40-70 wt%, iridium oxide 5-30 wt%, titanium oxide 5-30 wt%) is designed to enhance the anode's long-term operational durability while maintaining stability and activity.
3Ease of manufacture
If conventional coating methods are used to apply catalyst layer, then manufacturing process is simple, but uniform distribution of active material is difficult to achieve
Solution Approach 1:
The patent replaces conventional mechanical coating methods with electrostatic spray deposition technology. This substitution enables precise control of the coating process, ensuring uniform distribution of active materials (ruthenium oxide, iridium oxide, and titanium oxide) throughout the catalyst layer while maintaining ease of manufacture through an automated deposition process.
Solution Approach 2:
The patent uses an organic solvent-based slurry as an intermediary medium to deliver the catalyst components during electrostatic spray deposition. This slurry formulation, containing the metal oxides dispersed in an organic solvent, enables uniform distribution of active materials while simplifying the manufacturing process through controlled spray application.
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 anode achieves reduced overvoltage and improved lifetime, making it suitable for high-efficiency brine electrolysis with uniform catalyst layer distribution and reduced energy consumption.
Implementation Method 1
the coating is conducted by electrostatic spray deposition in which an amount of the composition for forming a catalyst layer per spray and a spray rate are respectively adjusted
Implementation Method 2
an anode for electrolysis having reduced overvoltage and improved lifetime while exhibiting high efficiency
Implementation Method 3
a catalyst layer formed on at least one surface of the metal base, wherein the catalyst layer contains ruthenium oxide, iridium oxide, palladium oxide, and titanium oxide
Data Source
Figure 1
AI summary
The present invention relates to an anode for electrolysis having reduced overvoltage and improved lifetime while exhibiting high efficiency and a method of preparing the same. Since the anode for electrolysis according to the present invention is prepared by electrostatic spray deposition, an active material may be uniformly distributed in a catalyst layer, and thus, an overvoltage may be reduced and lifetime may be improved while exhibiting high efficiency.