Advantages of Iridium Catalysts

Iridium, a member of the platinum group metals, offers several unique advantages:

High Stability: Iridium catalysts exhibit exceptional resistance to chemical and thermal degradation, making them suitable for harsh reaction conditions.
Superior Activity in Certain Reactions: For specific chemical reactions, such as C-H activation, iridium catalysts demonstrate higher activity than platinum or palladium.
Longevity: Due to their robustness, iridium catalysts often have a longer lifespan, reducing the need for frequent replacement.
Disadvantages of Iridium Catalysts
However, there are also drawbacks to consider:

Cost: Iridium is rarer and more expensive than platinum and palladium, making it a less economical choice for large-scale applications.
Limited Availability: The rarity of iridium can lead to supply constraints.
Lower Activity in Some Reactions: For certain reactions, like hydrogenation, platinum and palladium might be more effective.

Comparison with Platinum and Palladium
While platinum and palladium are more widely used due to their availability and cost-effectiveness, they may not match the durability and specific activity levels of iridium in certain reactions.