Ellipsometric and photocurrent characterization of oxide films formed on copper in borax solution with and without benzotriazol

Autor:	J.O. Zerbino
Rok vydání:	1999
Předmět:	Photocurrent Copper oxide Aqueous solution Borax General Chemical Engineering Inorganic chemistry Oxide chemistry.chemical_element Electrolyte Copper chemistry.chemical_compound chemistry Phase (matter) Electrochemistry
Zdroj:	Electrochimica Acta. 45:819-825
ISSN:	0013-4686
DOI:	10.1016/s0013-4686(99)00260-1
Popis:	The effect of the addition of benzotriazol on the passive behaviour of copper in borax solutions was analyzed in the potential region −0.32 to 0.71 V vs. RHE using voltammetric, photocurrent and ellipsometric techniques. Oxide formation can be explained as a sequence of Cu 2 O growth (inner layer ippl) and dissolution precipitation of Cu(II), (outer hydrated oxide layer (oppl)). The resulting photocurrent was proportional to the thickness of the ippl. However, significant variations in the amplitude and phase of the photocurrent were detected as a function of the potential region and the composition of the electrolyte. These effects are related to changes in the excess of cations accumulated in the ippl.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f0d3329a76e7326625d89bf61a531d47 https://doi.org/10.1016/s0013-4686(99)00260-1 Zobrazit plný text záznamu Full Text from ScienceDirect