Underpotential deposition of Cu on boron-doped diamond thin films

Article Abstract:

Experiments were performed to investigate the electrochemical deposition of copper on three kinds of boron-doped diamond thin film electrodes. Microwave-assisted chemical vapor deposition was utilized in preparing the diamond thin films, while electrochemical measurements were performed in a glass cell. Electrodes A and B exhibited spectral peaks at 1332 cm-1. The crystallites showed a (111) orientation. A prewave peak at a more positive potential than the peak for the deposition of bulk copper was attributed to the underpotential deposition of copper on crystalline defects.

Usage, Electric properties, Thin films, Copper, Chemical vapor deposition, Diamond films

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Potential-step chronocoulometric and quartz crystal microbalance investigation of underpotentially deposited Tl on Au(111) electrodes

Article Abstract:

A study investigated thallium (Tl) underpotentially deposited (upd) on Au(111) to determine the coverage of Tl. This research employed the methods of potential-step chronocoulometry and electrochemical quartz crystal microbalance. Findings revealed that the presence of an anion affects the development of Tl upd adlayers, with coadsorbed hydroxide anions stabilizing the positive-charge layer of Tl islands at anodic potentials. Moreover, the Tl upd system share similar electrochemical and structural qualities with the Pb system.

Quartz crystals, Thallium, Coulometry

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Anion effects on the kinetics of mercury underpotential deposition on Au(111) electrodes

Article Abstract:

The mechanism and kinetics of mercury underpotential deposition on Au(111) electrodes were investigated in the presence and absence of strongly interacting anions. Experimental results showed that the mercury underpotential deposition process is generally regulated by mercury-gold surface interactions in the absence of strongly interacting anions. On the other hand, the presence of sulfuric acid in the supporting electrolyte changes the kinetics of the initial and final stages of mercury deposition/dissolution.

Mercury, Mercury (Metal)

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