Yes, SMSI can be controlled and, in some cases, reversed. The extent of SMSI can be controlled by adjusting the treatment conditions, such as temperature and atmosphere. For example, reducing the temperature or changing the atmosphere from reductive to oxidative can diminish the SMSI effect. In some cases, post-treatment in an oxidative environment can reverse the encapsulation, restoring the original catalytic activity by re-oxidizing the support and removing the overlayer from the metal particles.
