For long-term storage, additional precautions are necessary. Here are some strategies:
1. Inert Atmosphere: Store the catalysts in an inert atmosphere, such as under nitrogen or argon, to prevent oxidation and other unwanted reactions.
2. Cryogenic Storage: For extremely sensitive catalysts, cryogenic storage (using liquid nitrogen) can be employed to halt any chemical reactions and maintain the catalyst's properties indefinitely.
3. Regular Monitoring: Periodically check the condition of the stored catalysts. Look for signs of degradation such as color changes, clumping, or changes in texture.
