Preventing metal sintering is critical for maintaining the longevity and performance of catalysts. Some strategies include:
Optimizing the Operating Temperature: Lowering the operating temperature can reduce the rate of sintering, although this must be balanced against the need for sufficient catalytic activity. Using Sintering-Resistant Supports: Certain support materials, such as ceria or zirconia, can help stabilize metal particles and prevent their migration. Adding Promoters or Inhibitors: Specific additives can be introduced to either inhibit the movement of metal particles or favor the formation of stable, small particles. Employing Core-Shell Structures: Encapsulating metal particles within a porous shell can physically restrict their movement, thus preventing sintering.
