A catalytic nanostructured cobalt oxide electrode enables positive potential operation for the cathodic electrogenerated chemiluminescence of Ru(bpy)3(2+) with dramatically enhanced intensity.
We report the first novel cathodic electrochemiluminescence of Ru(bpy)(3)(2+) at positive potential of +0.6 V (vs. Ag/AgCl) with a strong light emission clearly visible to the naked eye triggered by reactive oxygen species O(2)(-) on an in situ electrodeposited Co(3)O(4) nanostructured electrode.