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The stability of TiO2 electrodes is studied by monitoring changes in the interracial charge distribution through impedance measurements and photochemical current-potential (photo i-V) characterization. Aging effects caused by prolonged photoelectrolysis in acidic and alkaline media, or by anodic biasing in the dark are examined for reduced ([001] and [011] orientations) and substitutionally doped (niobium-doped [001]) TiO2. Three factors which lead to time-and "historydependent" characteristics are: photocorrosion, slow ionization of deep donors, and field-aided diffusion. Prolonged photoelectrolysis in alkaline solutions results in undoping of the crystal and cleavage along crystallographic shear planes for the [001] orientation of reduced TiO2. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.171.57.189 Downloaded on 2015-07-01 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.171.57.189 Downloaded on 2015-07-01 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.171.57.189 Downloaded on 2015-07-01 to IP

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Electrochemical Vapor Deposition (EVD) refers to the growth of a metal oxide layer due to the presence of an electrochemical potential gradient. In the simplest case the oxide growth can be modeled with the Wagner oxidation theory for metals.In )this work the theory for the growth of ionically conducting Zr (Y) d2-x will be discussed along with the growth of electronically conducting LaCr03.Experimental parameters important to EVD growth along with results of the EVD grown films of stabilized zirconia will be presented.

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