Several factors must be considered for effective controlled storage:
1. Temperature Control: Catalysts often require storage at specific temperatures to prevent degradation. For example, some metal catalysts might need refrigeration, while others might be stable at room temperature.
2. Humidity Regulation: Moisture can cause hydrolysis or oxidation of certain catalysts, leading to deactivation. Desiccants or controlled humidity environments are used to mitigate this risk.
3. Atmosphere Control: Some catalysts are sensitive to air or oxygen and may require storage under inert gases like nitrogen or argon. This is particularly common with transition metal catalysts.
4. Light Exposure: Photocatalysts and other light-sensitive materials must be stored in dark conditions to prevent unwanted reactions.