Low density, elongation, and suppression of the shrimp-like structures in the resistance-potential phase diagrams have been observed in the oscillatory dissolution of nickel.

For the past 10 years, the Virtual Tournament of Chemistry, TVQ, has been held in Brazil, engaging high school students with challenging questions that require cooperation, effort, and a literature search, while exploring the advantages of the Internet as a tool for self-instruction. The tournament has worked both as a way of narrowing the gap between high school and college chemistry and as a talent scout for STEM undergraduate programs.

The oscillatory electro-deposition of Cu/Sn in the presence of a surfactant shows quasiperiodic behavior, which is described by the coupling between a mainly activation and a mainly diffusion-controlled processes.

Li-ion battery voltage oscillations during galvanostatic operation were recently reported for the first time. Although the oscillations were found to be induced after a chemical modification on the electrode's surface, the electrochemical properties that allowed for the emergence of oscillations were not further investigated. To contribute to this direction, we conduct numerical simulations of oscillating batteries using multiphase porous electrode theory, and the simulated results are compared with experimental oscillation reports. In both, the (dis)charge rate increase promoted an oscillation frequency decrease, and simulation data was used to describe this trend as means of local current distribution. The oscillation property dependence on operation direction was also reproduced in the simulations. It is shown and discussed how exchange current models impact the oscillation morphology and frequency, and the experimental reports are reinterpreted with this finding.

This work reports the observation of quasiperiodic behavior during the oscillatory electrodeposition of Cu/Sn multilayers. By employing a wavelet transform on the current from the time-series, and by varying the temperature, it was possible to extract two apparent activation energies from the oscillation frequencies, of two different domains: one believed to be mainly activation limited (near 50 kJ/mol), extracted from a higher frequency oscillation, and one thought to be mainly diffusion limited (near 20 kJ/mol), extracted from a lower frequency oscillation. These energies are comparable to those calculated using current values from the cyclic voltametry in different temperatures.