Electrochemical passivation of iron in NO3-, SO4(super 2-), and ClO4(super -) solutions

Article Abstract:

A study was conducted to analyze the electrochemical passivation of iron in NO3-, So4(super 2-) and ClO4(super -) solutions at various pH values. The anodic polarizion of iron was investigated in nitric acid, sulfuric acid and perchloric acid with pH values between 0 and 3. The potential/time decay for passivated iron was supported by switching off the potentiostat after the polarization of iron. Results indicated that passive film breakdown occurs before reaching the oxygen evolution potential in acid solutions correlated with the presence of ClO4-.

Iron, Iron (Metal)

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Electrochemical atomic layer epitaxy deposition of CdS on Ag(111): an electrochemical and STM investigation

Article Abstract:

Electrochemical atomic layer epitaxy experiments were conducted to investigate the deposits of CdS on silver (Ag 111) substrates through alternating underpotential deposition of sulfur and cadmium. Scanning tunneling microscopy was performed to analyze the structure of the first atomic layers deposited. An average charge of 73 microC cm-2 was assigned to Cd and S which corresponded to 0.165 monolayers to one monolayer in the Ag(111) substrate. The first S layer was identified as an interface between the metal and the compound semiconductor.

Monomolecular films, Cadmium, Surface chemistry, Atomic structure, Polycrystalline semiconductors

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Enhancement of electrochemical hot electron injection into electrolyte solutions at oxide-covered tantalum electrodes by thin platinum films

Article Abstract:

A study was conducted to improve the electrochemical hot electron injection into electrolyte solutions at oxide-covered tantalum electrodes using thin platinum films. The platinum thin films were prepared by sputtering platinum supporting different thicknesses on the tantalum electrode. Experimental results indicated the inefficiency of the process of electrochemicdal hot electron injection into electrolyte solutions at a TaTa2O3 electrode.

Platinum, Electrolytes, Tantalum

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