Investigation on morphologies and supporter of cerium dioxide nanostructure on oxime based electrochemical sensors for organophosphorus detection

•An oxime-based sensor was designed to detect OP without electrocatalytic activity.•CeO2 rods with larger specific surface and better electrocatalytic activity exhibit the best performance.•CA large specific surface area and excellent adsorption properties enhances further the sensor’s performance.•The sensor shows low detection limit of 3.4 × 10−12 M and good practicality toward chlorpyrifos.