In vitro analogues of photosystem. II. Combined flash photolytic and conductometric study of light-induced oxygen evolution from water mediated by colloidal RuO/sub 2//TiO/sub 2/
Journal Article
·
· J. Am. Chem. Soc.; (United States)
Colloidal TiO/sub 2/ particles (R/sub h/ = 200 A) when charged with ultrafine deposits of RuO/sub 2/ are extremely active catalysts for water oxidation. A photochemical model system consisting of aqueous Ru(bpy)/sub 3//sup 2 +/ and S/sub 2/O/sub 8//sup 2 -/ solutions is used to probe the mechanistic details of the oxygen evolution reaction 4Ru(bpy)/sub 3//sup 3 +/ + 2H/sub 2/O ..-->.. 4H/sup +/ + O/sub 2/ + 4Ru(bpy)/sub 3//sup 2 +/. Application of combined flash photolysis and conductance techniques shows that hole transfer from Ru(bpy)/sub 3//sup 3 +/ to the catalyst and proton release from water decomposition occur simultaneously and within milliseconds at 3 mg of RuO/sub 2//L. Mechanistic implications are discussed.
- Research Organization:
- Ecole Polytechnique Federale, Lausanne, Switzerland
- OSTI ID:
- 5748743
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 104:2; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Sat Dec 31 23:00:00 EST 1977
· Angew. Chem. Int. Ed. Engl.; (United States)
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OSTI ID:6455085
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Journal Article
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Thu Jul 07 00:00:00 EDT 1983
· J. Phys. Chem.; (United States)
·
OSTI ID:5747639
Related Subjects
08 HYDROGEN
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
ALKALI METAL COMPOUNDS
BIOMIMETIC PROCESSES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
HYDROGEN COMPOUNDS
KINETICS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
REACTION KINETICS
REDOX REACTIONS
RUBIDIUM COMPOUNDS
RUBIDIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WATER
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
ALKALI METAL COMPOUNDS
BIOMIMETIC PROCESSES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
HYDROGEN COMPOUNDS
KINETICS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
REACTION KINETICS
REDOX REACTIONS
RUBIDIUM COMPOUNDS
RUBIDIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
WATER