Ag@CuO@Cu(OH)2: A Synergistic Catalyst for H2O2 Detection with Peroxidase‐Mimic Activity without Interference of O2

Abstract

AbstractHerein, we present silver nanoparticle anchored on copper oxide and copper hydroxide (Ag@CuO@Cu(OH)2) by green synthetic approach. Interestingly, as‐obtained Ag@CuO@Cu(OH)2 not only enhances the peroxidase‐like activity but also eliminates oxidase‐like activity. The peroxidase‐like activity was enhanced mainly due to the abundance of Ag+ and Cu2+ vacant states, which populate reactive oxygen species (ROS). This prolonged peroxidase‐like activity of Ag@CuO@Cu(OH)2 was successfully recognized H2O2 and also have long stability and repeatability. The proposed strategy, finding nanozymes with single activity will open a new opportunity to enhance the performance of colorimetric sensors.