ITO Electrode Modified by α‐K6[P2W18O62] Hybrid Nanofibers for Nitrite Determination

A promising nitrite sensor based on one‐dimensional polyoxometalate hybrid nanofibers was prepared and developed by electrospinning of a mixture of poly(vinyl alcohol) and α‐K₆P₂W₁₈O₆₂]?14H₂O (P₂W₁₈) onto the surface of an indium tin oxide (ITO) electrode. After thermal crosslinking, the P₂W₁₈ hybrid nanofibers are insoluble in aqueous solutions even after a period of 24 hours, which ensures the electrochemical stability of the P₂W₁₈ hybrid nanofiber‐modified ITO electrode. The cyclic voltammetry results have demonstrated that the P₂W₁₈ hybrid nanofiber‐modified ITO electrode exhibits excellent electrocatalytic activity toward the reduction of nitrite in acidic solutions. Additionally, long‐term stability and reproducibility have been observed.