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Experimental investigations of the catalytic CO oxidation on a Pd( 110) surface revealed that the temporal oscillations in the reaction rate (measured in a range 10 -3 Torr

Experiments performed on the electrodissolution of a copper rotating disk in a H2S04/NaCl solution are presented. Time series, attractors, next-maximum maps, and return maps are used as evidence for the existence of Shil'nikov chaos. Also, the development of the chaos is compared to the behavior of a set of model equations as a bifurcation parameter is varied.

The dynamic behavior of the electrodissolution of copper in acidic chloride solution is studied. We show transitions from two-to one-band chaos and from a chaotic attractor to a torus. All the examples were observed during the course of a single experiment, and the transitions take place as the nature of the electrode surface changed slowly relative to the characteristic time of the dynamic behavior.

We use density functional theory (DFT) calculations to determine the interaction between phenyl-modified silicene nanosheets. The adhesion energy curves between the nanosheets are compared for different van der Waals density functional (vdW-DF) functionals and the DFT-D2 Grimme method. Our results show that there is a weak attraction between the sheets at close separations, that is stronger when vdWs forces are included. Without including vdWs forces the interaction is negligible and occurs at a much larger separation, highlighting the need to include such forces when modelling these nanosheets. Of the vdWs methods, the optB88 functional gives the strongest interaction energy while the Grimme gives the weakest, with the separation at which the nanosheets adhere more strongly varying between 10.04 and 11.24 Å, as measured by the distance between the silicene layers. As the modified nanosheets are brought closer together at separations as close at ∼8 Å, the phenyl groups on the bottom of one nanosheet can fit in between the phenyl groups on the top of the 5

The electrodissolution of copper in solutions of IN H2SO4 and 0.1M NaC1 is studied. Results were obtained under potentiostatic conditions with a rotating disk anode at 200 and 1000 rpm over the potential range 100-1100 mV vs. a saturated calomel electrode. Potentiostatic current oscillations were observed for 300 mV -< E -< 1050 mV at 1000 rpm while oscillations were observed for 275 mV -< E -650 mV at 200 rpm. We describe the general changes in electrode surface morphology and in the film which covers the electrode surface during the course of the experiments, which exhibit oscillatory behavior, and we relate the nature of the film and surface morphology to the characteristics of the current oscillations. Some general conclusions are drawn about the features of this oscillatory system including the role of mass transfer and electrochemical reaction.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 61.129.42.15 Downloaded on 2015-05-15 to IP

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