Synthesis of Co 0.5 Mn 0.1 Ni 0.4 C 2 O 4 ⋅ n H 2 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 Co 0.5 Mn 0.1 Ni 0.4 C 2 O 4 ⋅ n  H 2 O micropolyhedrons illustrated prominent electrocatalytic activity for the glucose oxidation reaction. Additionally, the Co 0.5 Mn 0.1 Ni 0.4 C 2 O 4 ⋅ n  H 2 O micropolyhedrons, when used as an electrode material, illustrated an excellent lower limit of detection (1.5 μ m ), a wide detection concentration range (0.5–5065.5 μ m ), and a high sensitivity (493.5 μA m m −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.