化学
极化(电化学)
铟
兴奋剂
氧化铟锡
电化学
阳极
无机化学
锡
光电化学
氧化物
电极
光电子学
物理化学
物理
有机化学
作者
Arno Kraft,Horst Hennig,Andreas Herbst,Karl‐Heinz Heckner
标识
DOI:10.1016/0022-0728(93)03056-u
摘要
Abstract Tin-doped indium oxide (ITO) layers are proposed as transparent conductive contact coatings on semiconductor materials for Schottky barrier photoanodes. ITO electrodes undergo substantial changes under high positive potentials (greater than 1.5 V vs. a saturated calomel electrode) in aqueous electrolytes. Longer potentiostatic stress leads to a decrease in the oxygen evolution reaction. The rate of this decrease increases with increasing electrode potential. Fluctuations of the current density are possible. It was found by a combination of radiochemical and electrochemical methods that the oxygen evolution is accompanied by electrode corrosion. After this process the electrode probably consists of an unchanged bulk and an SnO 2 coating; its quasi-metallic character has disappeared.
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