Piezocatalytic Pt@BMO‐Gel Dressing for In Situ Generation of H ₂ and NO to Treat Infectious Inflammation Related to Incontinence

Abstract Incontinence‐associated dermatitis (IAD) leads to persistent tissue damage, antibiotic‐resistant infections, and neurogenic inflammation, greatly impairing patients' quality of life. Current therapies fail to simultaneously eliminate resistant bacterial biofilms, neutralize alkaline conditions, and break the cycle of ammonia (NH 3 ) regeneration. Here, a piezoelectric gas therapy strategy based on platinum‐decorated bismuth molybdate load in gelatin methacrylate (GelMA) hydrogel (Pt@BMO‐Gel) is introduced. Under ultrasound excitation, Pt@BMO generates high piezoelectric potential to improve charge separation, selectively adsorbs NH 3 on BMO (001) crystal facets, efficiently degrades NH 3 to normalize pH, and enables sustained release of H 2 and NO for dual antibacterial and anti‐inflammatory effects. Mechanistic insights from theoretical calculations show that the Pt (111) and BMO (001) surfaces lower energy barriers for H 2 formation and N─H bond cleavage, conducive to the generation of NO and H 2 . Transcriptomic profiling reveals downregulation of key nitrogen metabolism genes (arcC/hutH) in methicillin‐resistant Staphylococcus aureus (MRSA) and disruption of the (p)ppGpp‐mediated stringent response, effectively eradicating bacterial persistence via metabolic reprogramming. This study establishes Pt@BMO as an efficient piezoelectric catalyst for wound therapy, presenting a novel approach in medicine that transforms harmful NH 3 into therapeutic H 2 and NO, offering a promising treatment paradigm for infected wounds, such as incontinence‐associated dermatitis.