Adsorption of pyridine on polycrystalline gold electrode studied by radioactive-labeling method
- Resource Type
- Technical Report
- Authors
- Source
- Other Information: Pub. in Langmuir, Vol. 6, 974-979(1990)
- Subject
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY GOLD
SORPTIVE PROPERTIES
PYRIDINE
ADSORPTION
ADSORPTION HEAT
ADSORPTION ISOTHERMS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
LABELLED COMPOUNDS
ORIENTATION
PLATINUM
POLYCRYSTALS
TRACER TECHNIQUES
AZINES
CHEMISTRY
CRYSTALS
ELEMENTS
ENTHALPY
HETEROCYCLIC COMPOUNDS
ISOTHERMS
ISOTOPE APPLICATIONS
METALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PLATINUM METALS
PYRIDINES
SORPTION
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS 400400* -- Electrochemistry
- Language
- English
Adsorption of pyridine on smooth polycrystalline gold was studied by the use of the radioactive-labeling method and electrochemistry. The adsorption is reversible and, in the range of the structural uniformity of the adsorbate, characterized by the standard Gibbs energy of adsorption of 30 KiloJoules per mole. Weak repulsive interactions between vertically adsorbed pyridine molecules were found. At low bulk concentrations of the adsorbate, a horizontally oriented pyridine occupies the surface and rearranges to the vertical form with the increase in the electrode potential. The contrasting cases of pyridine adsorption on gold from acidic and neutral solution and differences encountered in bonding of pyridine by polycrystalline gold and platinum are discussed.