PdFe Ultrathin Nanosheets for Highly Sensitive Detection of Nitrite

Abstract

Abstract PdFe ultrathin nanosheets (NSs) were prepared by one‐step hydrothermal route. PdFe NSs showed superior catalytic activity towards the oxidation of nitrite due to the large surface area of 2 dimensional (2D) nanostructure and the synergetic effect between Pd and Fe. A sensitive and selective electrochemical nitrite sensing platform was designed base on PdFe NSs and the amperometric technique. The limit of detection (LOD) was found to be 0.12 μM (S/N=3), with a linear relationship between nitrite concentration and response current in the range of 1–160 μM. The nitrite sensor was applied to analysis of nitrite in tap water and sausage successfully.