Study of the electrochemically generated chemiluminescence of reactive oxygen species on indium tin oxide glass

Abstract A significant phenomenon is observed when indium tin oxide (ITO) glass is used as the anode in electrochemical studies. Notable luminescent signals are observed when a pulse potential is applied to an ITO electrode in alkaline solution in the absence of a luminescent reagent. This paper discusses the mechanism of this luminescence effect in detail. The investigation reveals that the reactive oxygen species (ROSs) generated during the electrolysis are O 2 − , OH and H 2 O 2. It was also found that the singlet oxygen ( 1 O 2 ) produced subsequently acted as the indispensable light-emitting entity and the ITO was a critical intensification determinant.