The first part of this report studies the electrochemical properties single-crystal platinum electrodes in acetonitrile electrolytes by means cyclic voltammetry. Potential difference infrared spectroscopy conjunction with linear voltammetry was used to obtain a molecular-level picture interface. second hydrogen evolution and oxidation reactions on three low-index faces Pt electrolytes. data (CVs IR spectra) strongly suggest that CN(-) molecules are adsorbed range -1.5 0.3 V versus Ag/AgCl....

In this paper, the electrochemical oxidation of hydrogen at interface between single-crystal platinum electrodes and imidazolium-type room-temperature ionic liquids (RTILs) is studied. This first report about properties in contact with liquids. It was found that imidazolium cation can be reduced to 1-alkyl-3-methylimidazol-2-ylidene species on basal plane presence increases reversibility process, suggesting it a proton-coupled electron-transfer reaction. On other hand, H2 surface...

Poly(3,4-ethylenedioxythiophene) (PEDOT) was galvanostatically synthesized and studied on a Pt(111) electrode in the following ionic liquids: 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Emim][NTf2]), 1-ethyl-2,3-dimethylimidazolium ([Emmim][NTf2]), 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([Bmim][OTf]) 1-butyl-2,3-methylimidazolium ([Bmmim][NTf2]) by cyclic voltammetry, chronoamperometry electrochemical impedance spectroscopy. The thin films prepared with...

Thin films of PEDOT synthesized on platinum single electrodes in contact with the ionic liquid 1-ethyl-2,3-dimethylimidazolium triflimide ([EMMIM]Tf 2 N) were studied by cyclic voltammetry, chronoamperometry, infrared spectroscopy and atomic force microscopy. It was found that polymer grows faster Pt(111) than Pt(110) or Pt(100) redox reactions associated p-doping process are much more reversible [EMMIM]Tf N acetonitrile. Finally, ion exchange charge carriers’ formation during reaction using...

In this paper the electrochemical properties of polythiophene thin films synthesized on single-crystal platinum electrodes are studied. It was found that properties, ion transport kinetics, and morphology depend surface orientation electrode used for their electropolymerization. Different oxidation levels, regarded as neutral, polaron, bipolaron, metallic states, usually in conjugated heterocyclic polymers. However, transitions between different levels were never clearly observed cyclic...

This communication shows experimental results that clearly demonstrated the influence of crystalline surface structure platinum electrode on early stages electropolymerization pyrrole in aqueous media. The determines adhesion, coverage level, charge transfer properties as well bulk synthesized film like morphology and ion exchange kinetics during its reduction oxidation. It is proven Pt(110) an Pt(111) surfaces are more suitable for obtain polypyrrole films with higher conductivity...

The first part of this communication studies the electrochemical properties thin films poly(3,4-ethylenedioxythiophene) (PEDOT) grown on three basal plane platinum electrodes via cyclic voltammetry, chronoamperometry, impedance spectroscopy and in situ FTIR spectroelectrochemistry. In second work redox reaction 2,5-dimercapto-1,3,4-thiadiazole (DMcT) at these modified is investigated voltammetry order to elucidate effect some polymer its electrocatalytic behavior, such as ionic resistance,...

The interface between two immiscible electrolyte solutions (ITIES) is ideally suited to detect redox-inactive ions by their ion transfer. Such electroanalysis, based on the Nernst-Donnan equation, has been predominantly performed using amperometry, cyclic voltammetry, or differential pulse voltammetry. Here, we introduce a new electroanalytical method alternating-current (AC) voltammetry with inherent advantages over traditional approaches such as avoidance of positive feedback iR...

The interface between two immiscible electrolyte solutions (ITIES) is a close approximation of an ideally polarisable interface, being non-equilibrated upon formation. Despite this, the formalism equilibrium thermodynamics, e.g., electrocapillary equations, are universally applied to interpret electrochemical processes at ITIES. This communication shows that interfacial energy measurements in real time during step potential experiments useful tool detect transient changes structure ITIES,...

The sonochemiluminescence (SCL) of luminol reaction was studied in alkaline medium using a dissolution luminol, sodium carbonate, hydrogen peroxide and carbon tetrachloride. presence tetrachloride enhances the SCL up to allow study real time cell phone video camera. This experimental setup allows cavitation dynamics through all reactor, including homogeneous heterogeneous zones. Finally, it tested effect ethanol, ionic strength pH on SCL.

The lack of an artificial system that mimics elemental sulfur (S8) oxidation by microorganisms inhibits a deep mechanistic understanding the cycle in biosphere and metabolism sulfur-oxidising microorganisms. In this article, we present biphasic biochemical under ambient conditions using liquid|liquid (L|L) electrochemical cell gold nanoparticles (AuNPs) as interfacial catalyst. interface between two solvents very different polarity is ideal environment to oxidise S8, overcoming incompatible...

The commercial use of Lithium-sulfur batteries has been limited by their short service life due to the shuttle effect polysulfides, which is transport polysulfides towards anode and formation highly resistive deposits that passivate electrodes. This problem can be solved decreasing these species from cathode simultaneously improving kinetics electron transfer reactions. work studies electrochemical impedance spectroscopy cyclic ac voltammetry redox reactions elemental sulfur in either...