Development of a carbon composite electrode made from polyethylene and graphite powder modified with copper(I) oxide

摘要: Abstract Solid carbon composite electrodes (CCEs) prepared by copper(I) oxide (Cu 2 O) dispersed in polyethylene and graphite powder have been investigated for use as working electrode amperometric flow-through detection alkaline solutions. The effects of matrix composition, electrocatalyst loading, short- long-term stability, noise current, sensitivity were assessed using d -mannitol a model compound. Excellent accompanied low residual current was observed with 50% (w/w) Cu O loading level the paste matrix. An estimate value double layer capacitance, evaluated cyclic voltametry 0.48 M NaOH, about 1360 μF/mm . Upon optimizing sensing terms formulation, hydroxide ion concentration, operating potential, limit flow injection mode, wall-jet cell, 5 μM 50 μl injections. bulk O-CCEs exhibit good mechanical stability under forced hydrodynamic conditions, overall offers advantage very background current. additional inherent feature these catalyst-modified is their renewal capability; surface can rapidly be renewed simple polishing procedure making sensor attractive routine quantitative measurements.