“…Moreover, mesoporous silica shells allow molecular diffusion and transport of the reactants in catalysis between the exterior and interior environments. − Additionally, the easy modification properties of mesoporous silica shells render coated nanoparticles highly promising as ideal carriers for high-efficiency immobilization of functional species such as recognition antibodies, which allows sensitive diagnosis . On the other hand, noble metal nanomaterials (i.e., silver, gold, palladium, and platinum) have fascinated scientists for over a century due to their unique performance in catalysis, electronics, and biology. , Additionally, recently, small Pt nanoparticles have showed multiple enzyme-like activities under different conditions, for example, oxidase-like, peroxidase-like, superoxide dismutase (SOD)-like, and catalase-like activities. − Nowadays, platinum-based assays have been developed for ultrasensitive detection of small molecules, ions, nucleic acids, and proteins. − It is generally accepted that the characteristics of the catalytic activity basically depend on the size, microstructure, and surface state of Pt nanoparticles. − …”