The whole range of processes occurring at a single crystal Cu(111) electrode in a sulfuric acid electrolyte (5 mM H2SO4) between hydrogen evolution and copper dissoln. has been studied using a combination of Cyclic Voltammetry (CV), in situ Scanning Tunneling Microscopy (STM), and in situ Fourier Transform IR Spectroscopy (FTIR) as well as ex situ characterization by means of Auger Electron Spectroscopy (AES), XPS and LEED (LEED). In particular, in situ STM measurements with at. resoln., carried out under various conditions, namely in the potentiostatic, potentiodynamic and quasi-spectroscopic mode, provide very detailed and direct information about the following interfacial properties and processes: the adsorption and desorption kinetics of the sulfate anions; the structure of the sulfate adlayer and the reconstruction of the copper surface underneath including drastic morphol. changes of the electrode surface; the abs. adsorption geometry of individual SO2-4 anions; the anodic copper corrosion and redeposition as well as the formation of cationic adsorbate (probably hydronium) layers in the regime of hydrogen evolution. Altogether the results demonstrate that already a relatively simple system such as Cu(111) in sulfuric acid soln. may exhibit a surprisingly high degree of complexity. [on SciFinder(R)]     «

The whole range of processes occurring at a single crystal Cu(111) electrode in a sulfuric acid electrolyte (5 mM H2SO4) between hydrogen evolution and copper dissoln. has been studied using a combination of Cyclic Voltammetry (CV), in situ Scanning Tunneling Microscopy (STM), and in situ Fourier Transform IR Spectroscopy (FTIR) as well as ex situ characterization by means of Auger Electron Spectroscopy (AES), XPS and LEED (LEED). In particular, in situ STM measurements with at. resoln., carried...     »

Surface structure (STM image of Cu(111) electrode in dil. sulfuric acid soln.) Electrodes Electronic structure (at. structure of Cu(111) electrode surfaces in dil. sulfuric acid soln.) Adsorbed substances (at. structure of sulfate adsorbate layer of Cu(111) electrode in dil. sulfuric acid soln.) Sorption (electrosorption adsorption-desorption kinetics of sulfate ions on Cu(111) electrode surfaces in dil. sulfuric acid soln.) Auger electron spectra Cyclic voltammetry IR spectroscopy Scanning tunneling microscopy X-ray photoelectron spectra (of Cu(111) electrode in dil. sulfuric acid soln.) Desorption (recombinative, kinetics adsorption-desorption kinetics of sulfate ions on Cu(111) electrode surfaces in dil. sulfuric acid soln.) atomic structure copper electrode surface sulfuric acid soln     «

Surface structure (STM image of Cu(111) electrode in dil. sulfuric acid soln.) Electrodes Electronic structure (at. structure of Cu(111) electrode surfaces in dil. sulfuric acid soln.) Adsorbed substances (at. structure of sulfate adsorbate layer of Cu(111) electrode in dil. sulfuric acid soln.) Sorption (electrosorption adsorption-desorption kinetics of sulfate ions on Cu(111) electrode surfaces in dil. sulfuric acid soln.) Auger electron spectra Cyclic voltammetry IR spectroscopy Scanning tunn...     »

CAN 138:326818 65-3 General Physical Chemistry Institut fur Physikalische und Theoretische Chemie, Universitat Bonn, Bonn, Germany. Journal 0303-4216 14808-79-8 (Sulfate) Role: PEP (Physical, engineering or chemical process), PYP (Physical process), PROC (Process) (adsorption-desorption kinetics on Cu(111) electrode surfaces in dil. sulfuric acid soln.); 7664-93-9 (Sulfuric acid) Role: NUU (Other use, unclassified), USES (Uses) (at. structure of Cu(111) electrode surfaces in dil. sulfuric acid soln.); 7440-50-8 (Copper) Role: DEV (Device component use), USES (Uses) (single crystal; at. structure of Cu(111) electrode surfaces in dil. sulfuric acid soln.)     «

CAN 138:326818 65-3 General Physical Chemistry Institut fur Physikalische und Theoretische Chemie, Universitat Bonn, Bonn, Germany. Journal 0303-4216 14808-79-8 (Sulfate) Role: PEP (Physical, engineering or chemical process), PYP (Physical process), PROC (Process) (adsorption-desorption kinetics on Cu(111) electrode surfaces in dil. sulfuric acid soln.); 7664-93-9 (Sulfuric acid) Role: NUU (Other use, unclassified), USES (Uses) (at. structure of Cu(111) electrode surfaces in dil. sulfuric acid...     »