Sol‐gel‐derived cobalt phthalocyanine‐dispersed carbon composite electrodes for electrocatalysis and amperometric flow detection

A new sol‐gel‐derived electrocatalytic carbon composite electrode was prepared by dispersing cobalt phthalocyanine (CoPC) in a carbon ceramic network. The performance of the CoPC‐modified sol‐gel carbon composite electrode compares favorably with that of common CoPC‐containing carbon pastes in term of electrocatalytic properties and short‐ and long‐term stability. The greatly improved stability and electrocatalytic action are illustrated in cyclic‐voltammetric and flow injection amperometric measurements of hydrogen peroxide, hydrazine, oxalic acid, cysteine and thiourea. Such improvements are coupled with the versatility, mechanical stability and renewability features of sol‐gel carbon composites.