Investigation on Electronic Property of Passive Film on Nickel in Bicarbonate/Carbonate Buffer Solution

Autor:	Dangguo Li, Haosheng Chen, Jiadao Wang, Darong Chen
Rok vydání:	2011
Předmět:	Bicarbonate Inorganic chemistry Non-blocking I/O Analytical chemistry chemistry.chemical_element General Chemistry Buffer solution Acceptor Chloride chemistry.chemical_compound Nickel chemistry X-ray photoelectron spectroscopy medicine Carbonate medicine.drug
Zdroj:	Chinese Journal of Chemistry. 29:243-253
ISSN:	1001-604X
DOI:	10.1002/cjoc.201190073
Popis:	The electronic properties of passive film formed on nickel in bicarbonate/carbonate buffer solution were studied by electrochemical impedance spectra (EIS) and Mott-Schottky plot. The film composition was analyzed by X-ray photoelectron spectroscopy (XPS). The results showed that passive film exhibited p-type semi-conductive character, and the acceptor density (NA) decreased with increasing potential, prolonging time, decreasing temperature, increasing pH value and decreasing chloride/sulfur ions concentration. The transfer resistance and film resistance increased with the above factors changing. XPS results showed that passive film was composed of NiO and a little amount of Ni2O3.
Databáze:	OpenAIRE
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