Figure 15.
Radioactive isotope tracer studies of the Co-OEC repair process. (a) Percentage of 57Co leached from films of Co-OEC on an electrode: with a potential bias of 1.3 V (NHE) turned on and off at the times designated () (the trace begins with the applied potential on); and without an applied potential bias (
). (b) 32P leaching from Co-OEC on an electrode with an applied potential of 1.3 V (NHE) (
) and without an applied potential bias (
). (c) Percentage of 57Co leached from a typical Co-oxide catalyst on an electrode under a potential bias of 1.3 V (
) and 1.5 V (
) (NHE) and an unbiased electrode (
). Pi was added at the time points indicated by the arrows. Figures adapted from ref. 158 and reproduced here with permission from the American Chemical Society.