Deciphering Pyridinic N−Mediated Inhibition Mode in Platinum Nanozymes for Pesticide Distinction

Le résumé fourni par la source

Abstract Developing high‐performance nanozymes with efficient H 2 O 2 activation capacity for biosensing still faces a great challenge. Here, Pt nanoparticles on a porous nitrogen−doped carbon carrier (Pt─N p ─C) are prepared as efficient nanozymes. By optimizing the pyridinic N content in the carbon carrier, a positive correlation has been found between the pyridinic N content and the peroxidase−like activity of Pt─N p ─C nanozymes. Additionally, chlorpyrifos, a common pesticide, exerts reversible mixed inhibition on the peroxidase−like activity of Pt─N p ─C nanozymes, characterized by inhibition constants K I ′ of 0.180 mM and K I of 0.147 mM. By combining the inhibition effect with array technology, a three−channel colorimetric sensor array capable of precisely discrimination five pesticides is constructed. The study provides fundamental insights into nanozyme inhibition modes and advanced pesticide sensing applications.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.