The kinetics and mechanisms of the photo-assisted reactions of hybrid catalysts: H/sub 2/O/sub 2/ production and SO/sub 2/ oxidation
There has been considerable interest in semiconductor materials because of their potential applications in fuel synthesis and as catalysts for redox reactions. The authors describe here the development of a semiconductor-transitional metal complex system, namely, titanium dioxide supported cobalt-tetrasulfophthalocyanine (TiO/sub 2/-CoTSP). They demonstrate its ability to convert light energy into redox potential and thereby achieve catalytic redox reaction (i.e. H/sub 2/O/sub 2/ production by O/sub 2/ reduction). The basic operating principle is that in order to utilize light efficiently, the light generated electron-hole pair in the semiconductor material must be attenuated long enough to be used in the desired reaction. CoTSP proves to serve this function because of its well known ability to undergo reversible changes between Co(I)TSP, Co(II)TSP and Co(III)TSP. An important objective of this study is to establish viable pathways through which atmospheric H/sub 2/O/sub 2/ may be formed.
- Research Organization:
- California Institute of Technology, Keck Labs., Pasadena, CA 91125
- OSTI ID:
- 5655165
- Report Number(s):
- CONF-860425-
- Journal Information:
- Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States), Vol. 31:2; Conference: 191. American Chemical Society national meeting, New York, NY, USA, 13 Apr 1986
- Country of Publication:
- United States
- Language:
- English
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ACID RAIN
ATMOSPHERIC CHEMISTRY
HYDROGEN PEROXIDE
CHEMICAL REACTION KINETICS
PHOTOCHEMISTRY
PRODUCTION
SULFUR DIOXIDE
OXIDATION
CATALYSTS
CHEMICAL REACTION YIELD
COBALT COMPLEXES
CYANIDES
PHTHALATES
REDOX REACTIONS
SEMICONDUCTOR MATERIALS
TITANIUM OXIDES
ATMOSPHERIC PRECIPITATIONS
CARBOXYLIC ACID SALTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
HYDROGEN COMPOUNDS
KINETICS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
RAIN
REACTION KINETICS
SULFUR COMPOUNDS
SULFUR OXIDES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
YIELDS
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