Preparation of urchin-like Pd-Pt-Ir nanozymes and their application for the detection of ascorbic acid and hydrogen peroxide

摘要

The urchin-like trimetallic nanozyme Pd-Pt-Ir was firstly prepared through atomic replication. Due to the high affinity to H2O2, the activity of Pd-Pt-Ir is higher than that of Pd-Pt. Based on this concept, Pd-Pt-Ir was applied for the detection of ascorbic acid and hydrogen peroxide. The linear range of ascorbic acid and hydrogen peroxide were 25-800 mu M and 3.9-62.5 mM, respectively, and the LODs were11.7 mu M and 3.6 mM, respectively. Furthermore, the Pd-Pt-Ir nanozyme was applied for the rapid detection of ascorbic acid, and a test strip was built. Ascorbic acid concentrations ranging from 0 to 31.2 mM were observed. Based on this work, the simple and rapid method proposed offers excellent application prospects for the detection of ascorbic acid and hydrogen peroxide.