Rate constants for recombination and hole transfer during oxygen evolution at illuminated alpha-Fe(2)O(3) electrodes were measured by intensity-modulated photocurrent spectroscopy and found to be remarkably low. Treatment of the electrode with a Co(II) solution suppressed surface recombination but did not catalyse hole transfer. Intermediates in the reaction were detected spectroscopically.
Cummings, C. Y., Marken, F., Peter, L. M., Tahir, A. A., & Wijayantha, K. G. U. (2012). Kinetics and mechanism of light-driven oxygen evolution at thin film α-Fe2O3 electrodes. Chemical Communications, 48(14), 2027-2029. https://doi.org/10.1039/c2cc16382a