Local electrochemical formation and selective detection of reactive oxygen species

Oxygen reduction reaction (ORR) is undeniable the most common reactions taking place in our environment within biological or technical systems. However, the reduction reaction of dioxygen produces not only hydrogen peroxide (uptake of 2 electrons) or water (uptake of 4 electrons) but also a broad range of oxygen-derived species. These products are characterized by their short lifetime and high reactivity and are named reactive oxygen species (ROS). This thesis describes different approaches to produce and detect the formation of ROS during ORR.