Smart hydrogels offer several advantages in catalytic applications: 1. Enhanced Control: The responsiveness to external stimuli allows for precise control over the catalytic processes. 2. Reusability: Their reversible nature enables repeated use, reducing costs and environmental impact. 3. Selectivity: By adjusting the environmental conditions, these hydrogels can selectively target specific reactions or substrates. 4. Stability: Encapsulation within hydrogels can improve the stability of catalysts, protecting them from degradation.