Abstract

Photocurrent‐potential curves at polycrystalline electrodes in acidic solutions are reported to be similar to those found in basic solutions. Faradaic collection efficiency of 100% for photoelectrolyzed oxygen has been achieved in a closed cell configuration. Stable photocurrents has been demonstrated in various acidic media, and trace amounts of Fe(III) detected in the working solutions gave an indication of the dissolution rate. The stability of the electrode is discussed and compared to other metal oxide photoanodes.

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