Author:
Kankare Jouko J.,Ryan Douglas E.,Fürst Bernhard J.
Abstract
Cathodic luminescence of oxide covered aluminium and tantalum electrodes in various electrolyte solutions was measured at low amplitude (0 to 10 V) ac excitation. Oxygen or hydrogen peroxide are necessary constituents of the solution for high levels of light emission. For the aluminium electrode in tartrate solutions, copper enhanced light emission at concentrations down to 10 ppb.The tantalum electrode gave fairly high luminescence in solutions containing sodium perchlorate, perchloric acid, and hydrogen peroxide, but copper had no influence on the luminescence output. A mechanism based on the electrogeneration of singlet oxygen and its subsequent radiative transition to the triplet state is suggested.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis