PdFe Ultrathin Nanosheets for Highly Sensitive Detection of Nitrite

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 mu M (S/N=3), with a linear relationship between nitrite concentration and response current in the range of 1-160 mu M. The nitrite sensor was applied to analysis of nitrite in tap water and sausage successfully.