In-situ characterization of metal/electrolyte interfaces: sulfate adsorption on Cu(111)

As a prototypical example of a metal-electrolyte interface the adsorption of sulfate on well defined Cu(111) single crystal electrodes from a 5mM H2SO4 soln. was studied by in-situ electrochem. scanning tunneling microscopy (EC-STM) and IR reflection absorption spectroscopy (IRAS). The EC-STM images show the formation of the known Moire-like structure upon adsorption of sulfate on the Cu(111) surface. While IR frequency data fail to provide information about the anion adsorption site, high-resoln. STM images taken under specific tunneling conditions also clearly reveal the C2v symmetry and the 2-fold bridging coordination of the sulfate adsorption complex. Anal. of the IR intensities, however, does show that the sulfate adsorption starts at a potential noticeably lower (less anodic) than the potential of 1st Moire formation. In this potential region the adsorbed sulfate is very mobile on the surface and difficult to image by STM. Adsorption rate and sulfate coverage are strongly dependent on the electrode potential. The slow adsorption process leading to a well ordered Moire structure is compared to a fast adsorption process by applying potential steps. Under the latter conditions no or only barely ordered sulfate adlayers are obsd. with STM. As shown by the IR measurements, however, the satn. coverage is hardly affected by the adsorption rate. [on SciFinder(R)]     «

As a prototypical example of a metal-electrolyte interface the adsorption of sulfate on well defined Cu(111) single crystal electrodes from a 5mM H2SO4 soln. was studied by in-situ electrochem. scanning tunneling microscopy (EC-STM) and IR reflection absorption spectroscopy (IRAS). The EC-STM images show the formation of the known Moire-like structure upon adsorption of sulfate on the Cu(111) surface. While IR frequency data fail to provide information about the anion adsorption site, high-resol...     »

Scanning tunneling microscopy (electrochem. in in-situ characterization of metal/electrolyte interfaces by sulfate adsorption on Cu(111) electrode) Adsorption (electrochem. of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces) Interface (electrolyte-metal in-situ characterization of) IR spectra (in adsorption of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces) Adsorbed substances (morphol. and IR spectra of adsorbed sulfate on copper electrode) Interfacial structure (of sulfate adlayer on copper electrode) metal electrolyte interface characterization sulfate adsorption copper electrode     «

Scanning tunneling microscopy (electrochem. in in-situ characterization of metal/electrolyte interfaces by sulfate adsorption on Cu(111) electrode) Adsorption (electrochem. of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces) Interface (electrolyte-metal in-situ characterization of) IR spectra (in adsorption of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces) Adsorbed subs...     »

CAN 136:44522 72-2 Electrochemistry Institut fur Physikalische und Theoretische Chemie, Universitat Bonn, Bonn, Germany. Journal 0031-8965 7664-93-9 (Sulfuric acid) Role: CPS (Chemical process), NUU (Other use, unclassified), PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process), USES (Uses) (adsorption of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces); 7440-50-8 (Copper) Role: DEV (Device component use), PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process), USES (Uses) (adsorption of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces); 14808-79-8 (Sulfate) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (adsorption of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces)     «

CAN 136:44522 72-2 Electrochemistry Institut fur Physikalische und Theoretische Chemie, Universitat Bonn, Bonn, Germany. Journal 0031-8965 7664-93-9 (Sulfuric acid) Role: CPS (Chemical process), NUU (Other use, unclassified), PEP (Physical, engineering or chemical process), PRP (Properties), PROC (Process), USES (Uses) (adsorption of sulfate by copper electrode in sulfuric acid soln. in in-situ characterization of metal/electrolyte interfaces); 7440-50-8 (Copper) Role: DEV (Device component use...     »