Electrochemical sensor investigation of carbon-supported PdCoAg multimetal catalysts using sugar-containing beverages

Novel PdCoAg/C nanostructures were suc-cessfully synthesized by the polyol method in order to develop electrocatalysts,related to the glucose sensor performance of the high glycemic index in beverages.The characterization of this novel PdCoAg/C electrocatalyst was performed by X-ray diffraction,scanning electron microscopy,transmission clectron microscopy,and high-resolution transmission electron microscopy equipped with energy dispersive X-ray.The characterization results revealed that electronic state of the PdCoAg/C electro-catalyst was modified by the addition of the third metal.The electrochemical performances of the sensor were investigated by cyclic voltammetry and differential pulse voltammetry.The prepared enzyme-free sensor exhibited excellent catalytic activity against glucose with a wide detection range(0.005 to 0.35 mmol·L^-1),low limit of detection(0.003 mmol·L^-1),high sensitivity(4156.34μA·mmol^-1·L·cm^-3),and long-term stability(10 days)because of the synergistic effect between the termary metals.The glucose contents of several energy drinks,fruit juices,and carbonated beverages were analyzed using the novel PdCoAgNGCE/C sensor system.These results indicate the feasibility for applications in the foods industry.