Abstract
The diffuse reflection spectra and the photoelectrochemical properties of the ferrites , , and with spinel structure are presented. A marked difference between the reflection spectra and the photocurrent action spectra is discussed. The onset wavelength of the photocurrent lies at about 550 nm. Steady‐state photocurrents are severely limited by a relatively low absorptivity in the visible region and by surface recombination at low potentials. From an admittance spectra analysis, a value for the flatband potential of was obtained, viz., −0.5V vs.SCE in .
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