An ITO bipolar array for electrochemiluminescence imaging of H2O2

An ITO bipolar array for electrochemiluminescence (ECL) imaging of H2O2 was reported. Silver nanoparticle-reduced graphene oxide (AgNP-rGO) composites were simultaneously coated on the cathodes of a bipolar array via a one-step electrodeposition approach. Compared to naked ITO, the above composites exhibited notable electrocatalytic activity to H2O2. The concentration of H2O2 could be indicated by the ECL image of Ru(bpy)32 +/2-(dibutylamino) ethanol (DBAE) at anodes based on charge balance. This chip system, not only provides a fast manner to prepare nanocomposites on bipolar electrodes (BPEs), but also can realize high-throughput visual detection.