Share Email Print
cover

Proceedings Paper

Photoelectrochemical And Structural Behavior Of Manganese Oxide/N-Si Photoanodes
Author(s): R. C. Kainthla; B. Zelenay; J. O'M. Bockris
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

N-silicon photoanodes have been protected against photocorrosion, for use in photo-assisted water electrolysis photoelectrochemical cells, by chemically depositing a thin film of manganese oxide on the surface. Current-potential characteristics of the electrodes have been measured in 0.5 M K2SO4 solution and in 0.2 M NaOH solutions. The onset potential for photocurrent in these electrolytes occur at + 1.1 V and + 0.56 V (vs NHE), respectively. The occurrence of photocurrent due to the photoevolution of oxygen was confirmed by pH dependence of onset potential and the appearance of gas bubbles on the electrode surface. When used in 0.5 M K2SO4 solution, at ~ 1.1 mA.cm-2 photocurrent density, the electrode has shown complete stability, for continuous illumination of ~ 650 hours. The surface analysis of the electrode surface shows that manganese in the manganese oxide is present in + 3 state. The use of electrode for oxygen evolution in aqueous solution changes the Mn203 to MnO (OH) on the surface without affecting the bulk composition.

Paper Details

Date Published: 2 December 1985
PDF: 6 pages
Proc. SPIE 0562, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV, (2 December 1985); doi: 10.1117/12.966303
Show Author Affiliations
R. C. Kainthla, Texas A&M University (United States)
B. Zelenay, Texas A&M University (United States)
J. O'M. Bockris, Texas A&M University (United States)


Published in SPIE Proceedings Vol. 0562:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion IV
Carl M. Lampert, Editor(s)

© SPIE. Terms of Use
Back to Top