Spectroscopic determination of flatband potentials for polycrystalline TiO[sub 2] electrodes in nonaqueous solvents

Journal Article · Wed Feb 17 23:00:00 EST 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100109a029· OSTI ID:6296744

Redmond, G; Fitzmaurice, D ^[1]

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1. University College, Dublin (Ireland)

The flatband potential V[sub fb] of a polycrystalline TiO[sub 2] electrode has been determined, using a newly developed spectroscopic technique, in a range of nonaqueous solvents (MeCN, THF, DMF, MeOH, and EtOH). It has been found that V[sub fb] is significantly more positive for water and nonaqueous protic solvents (MeOH and EtOH) than for nonaqueous aprotic solvents (MeCN, DMF, and THF) due to establishment of a proton adsorption-desorption equilibrium. Further, the authors observe that V[sub fb] is independent of the electrolyte used in nonaqueous protic solvents, but in nonaqueous aprotic solvents V[sub fb] may depend on the electrolyte cation. Cations which have been found to be potential determining are Li[sup +], Na[sup +], and Mg[sup +]. Results indicating that both cation adsorption and intercalation are important in determining V[sub fb] are presented. 23 refs., 4 figs., 4 tabs.

• OSTI ID: 6296744
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:7; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140500 -- Solar Energy Conversion
36 MATERIALS SCIENCE
360606 -- Other Materials-- Physical Properties-- (1992-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ACETONITRILE
ADSORPTION
ALCOHOLS
CHALCOGENIDES
CHARGED PARTICLES
CHEMISTRY
CONVERSION
DATA
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
ELECTRODES
ENERGY CONVERSION
ETHANOL
EXPERIMENTAL DATA
FURANS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
IONS
LITHIUM IONS
MAGNESIUM IONS
METHANOL
NITRILES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SODIUM IONS
SOLAR ENERGY CONVERSION
SOLVENTS
SORPTION
SPECTROSCOPY
TETRAHYDROFURAN
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS