While AES is a powerful tool, it has some limitations: 1. Vacuum Requirement: AES requires a high vacuum environment, which may not always represent the actual conditions under which catalysts operate. 2. Sample Damage: The electron beam used in AES can sometimes damage sensitive samples, potentially altering the surface composition. 3. Complex Spectra: The interpretation of AES spectra can be complex, particularly for materials with overlapping Auger peaks.
