Iridium-Tantalum-Titanium (Ir-Ta-Ti) Anode

IrO₂ and Ta₂O₅ Mixed Metal Oxide (MMO) Anode
Excellent electrocatalytic activity in OER
Robust corrosion resistance
Long-term stability
High current density

Product Superiority

Iridium-Tantalum-Titanium (Ir-Ta-Ti) Anode

Iridium-Tantalum-Titanium (Ir-Ta-Ti) Anode, also known as an Iridium-Tantalum-Titanium oxide-coated titanium anode, is a specialized type of dimensionally stable anode (DSA). It incorporates a mixed-metal oxide (MMO) coating of iridium oxide (IrO₂) and tantalum oxide (Ta₂O₅) on a titanium (Ti) substrate. This configuration offers improved electrochemical performance, particularly in applications that require efficient oxygen evolution reactions (OER).

Specifications

Property	Specification
Base Material	Titanium (Grade 1 or Grade 2)
Coating Composition	Iridium Oxide (IrO₂) and Tantalum Oxide (Ta₂O₅)
Coating Thickness	Typically 6 to 15 microns
Noble Metal Content	Approximately 15–30 g/m²
Current Density	Up to 15,000 A/m²
Operating Temperature	Up to 80°C
pH Range	1–12
Electrical Conductivity	High, facilitating efficient electrochemical reactions
Common Forms	Mesh, plate, rod, wire, tubular, and linear
Lead Material	Titanium, nickel, or copper

Advantages of Iridium-Tantalum-Titanium (Ir-Ta-Ti) Anode

High corrosion resistance: Tantalum oxide is renowned for its exceptional resistance to corrosion in aggressive environments, even surpassing the stability of titanium. This makes Ta-Ir-Ti anodes potentially suitable for applications involving strong acids, high temperatures, or harsh chemical conditions.
Improved conductivity: Doping Ta2O5 with IrO2 can enhance the electrical conductivity of the oxide layer, improving the efficiency of electron transfer during electrochemical processes.
Catalytic activity: IrO2 provides electrocatalytic activity for reactions such as oxygen evolution. The role of Ta2O5 in catalysis is less explored but could contribute to specific functionalities.
Stability: Tantalum oxide is a highly stable oxide with good dielectric properties. This can contribute to the overall stability of the anode and potentially reduce unwanted side reactions.
Durability: The combination of oxides can offer good mechanical strength and durability.

Application Areas

Applications

1. Cathodic Protection Systems
Ir-Ta MMO anodes are extensively used in impressed current cathodic protection (ICCP) systems to prevent corrosion of submerged or buried metal structures. Their low consumption rate and stability in various environments, including soil, freshwater, and seawater, make them ideal for protecting pipelines, storage tanks, and offshore platforms.

2. Electrolytic Water Treatment
These anodes are employed in the production of sodium hypochlorite and other disinfectants through electrolysis. Their high electrocatalytic activity and resistance to chlorine evolution enhance the efficiency and longevity of electrochlorination systems used in swimming pools, sewage treatment, and industrial water purification.

3. Electrowinning and Electrorefining
In metal extraction processes, such as electrowinning, Ir-Ta MMO anodes provide stable performance and high current efficiency. They are particularly effective in environments with low chloride concentrations, offering advantages over other coatings, such as Ir-Ru, in specific applications.

4. Electroplating and Electrochemical Synthesis
Ir-Ta MMO anodes are utilized in electroplating industries for metal deposition processes. Their robust performance in corrosive environments and high current densities makes them suitable for applications requiring consistent and efficient electrochemical reactions.

5. Hydrogen Production via Electrolysis
In proton exchange membrane (PEM) electrolyzers, Ir-Ta mixed metal oxide (MMO) anodes contribute to efficient hydrogen production. Their stability and low overpotentials enhance the overall performance of electrolyzers, making them a preferred choice for sustainable hydrogen generation.

6. Chlor-Alkali Industry
These anodes are integral to the chlor-alkali process, which produces chlorine and sodium hydroxide from salt. Their resistance to chlorine evolution and high current efficiency improve the overall efficiency and lifespan of electrolytic cells in this industry.