Electrochemistry in near-critical and supercritical fluids. 3. Studies of Br/sup -/, I/sup -/, and hydroquinone in aqueous solutions

Journal Article · Thu Jul 31 04:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100407a066· OSTI ID:5469741

Flarsheim, W J; Tsou, Y M; Trachtenberg, I; Johnston, K P; Bard, A J

A new type of apparatus has been constructed for carrying out electrochemistry in near-critical and supercritical aqueous solutions. The following systems have been studied at a platinum electrode: H/sub 2/O/O/sub 2/, I/sup -//I/sub 2/, Br/sup -//Br/sub 2/, and hydroquinone/benzoquinone. The compact alumina flow cell can be heated or cooled quickly and can be recharged with fresh electrolyte solution while at high temperature and pressure. A large reduction in the potential required for the electrolysis of water was observed. Diffusivities have been measured for iodide ions and hydroquinone. General agreement with the Stokes-Einstein model was observed in the temperature range 25-375/sup 0/C.

• Research Organization: Univ. of Texas, Austin
• OSTI ID: 5469741
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:16; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ANIONS
AQUEOUS SOLUTIONS
AROMATICS
BENZOQUINONES
BROMINE
CHARGED PARTICLES
CHEMISTRY
CRITICAL PRESSURE
CRITICAL TEMPERATURE
DATA
DISPERSIONS
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
EXPERIMENTAL DATA
HALOGENS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
INFORMATION
IODINE
IONS
MEDIUM TEMPERATURE
METALS
MIXTURES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
QUINONES
SOLUTIONS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VOLTAMETRY
WATER