Several methods can be employed to control air exposure:
Inert Atmosphere: Using an inert gas like nitrogen or argon to create an oxygen-free environment can prevent oxidation and other air-related issues. Sealing: Properly sealing the reaction vessel can minimize air ingress and protect the catalyst. Storage Conditions: Storing catalysts in airtight containers or under vacuum can help maintain their activity and longevity. Passivation: Some catalysts can be passivated by forming a thin, protective oxide layer that prevents further oxidation while maintaining catalytic activity.