Electron Lever‐Assisted d‐Band Center Engineering in Intermetallic Alloy Nanozymes for Efficient Marine Microbiologically Influenced Corrosion Inhibition

ABSTRACT Microbiologically influenced corrosion (MIC) remains a persistent global challenge, with traditional inhibition strategies often constrained by limited efficiency, poor durability, and ecological toxicity. Herein, we propose a rational design that utilizes a heteroatom as an electronic lever to circumvent these constraints. By integrating heteroatom Ag into an FePt matrix, the d‐band center of the Pt active sites is upshifted, optimizing the adsorption energy of substrates and ensuring superior catalytic performance even in H 2 O 2 ‐limited marine environments. The resulting FePtAg ( L ‐FPA) nanozymes exhibited enhanced triple‐enzyme activities (haloperoxidase, nicotinamide adenine dinucleotide oxidase, and peroxidase), triggering a localized burst of reactive chlorine and oxygen species. This synergistic action effectively disintegrated the extracellular polymeric substance barrier and induced metabolic disruption, achieving an exceptional 99.9% biofilm inhibition rate and 99.3% MIC inhibition efficiency against Pseudomonas aeruginosa . Furthermore, the intermetallic structure promoted by heteroatom Ag provided outstanding durability of nanozymes, with their antibiofilm efficiency decreasing by only 3% for over 120 days. This work not only elucidates the intrinsic correlation between electronic modulation and inhibition efficiency in MIC inhibitors but also offers a rational framework for designing nanozymes tailored to challenging and hostile environments.