Synthesis of Co0.5 Mn0.1 Ni0.4 C2 O4 ⋅n H2 O Micropolyhedrons: Multimetal Synergy for High-Performance Glucose Oxidation Catalysis.

Owing to the synergy between metals, trimetal oxalate micropolyhedrons have been synthesized by means of a room-temperature coprecipitation strategy. The effect of their nanoscale size on their electrochemical performance toward glucose oxidation was investigated. In particular, the Co0.5 Mn0.1 Ni0.4 C2 O4 ⋅n H2 O micropolyhedrons illustrated prominent electrocatalytic activity for the glucose oxidation reaction. Additionally, the Co0.5 Mn0.1 Ni0.4 C2 O4 ⋅n H2 O micropolyhedrons, when used as an electrode material, illustrated an excellent lower limit of detection (1.5 μm), a wide detection concentration range (0.5-5065.5 μm), and a high sensitivity (493.5 μA mm-1  cm-2 ). Further analysis indicated that the effectively improved conductivity may have been due to the small size of the materials, and it was easier to form a flat film when Nafion was coated onto the glassy carbon electrode.