Influence of catalyst parameters and operational variables on the photocatalytic cleavage of water
- Univ. of Patras (Greece)
The photocatalytic cleavage of water over Pt-RuO[sub 2]/TiO[sub 2] catalysts under illumination in the near UV (250-400 nm) is investigated in a batch and in a semicontinuous flow photoreactor cell. The effects of operational variables and parameters related to chemical and physical characteristics of the catalyst on the rate of hydrogen production are investigated. It is shown that the rate of the process is insensitive to the details of surface structure of Pt; the rate exhibits a weak maximum at a Pt loading of 0.5 wt% and is independent of Pt loading when this exceeds 1 wt%. The rate of H[sub 2] production is strongly dependent on the pH of the slurry, increasing significantly at pH levels higher than 10. The rate was also observed to be a linear function of the intensity of illumination in the near UV.
- OSTI ID:
- 7189755
- Journal Information:
- Journal of Catalysis; (United States), Vol. 134:2; ISSN 0021-9517
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HYDROGEN PRODUCTION
PHOTOLYSIS
PLATINUM
CATALYTIC EFFECTS
WATER
CATALYST SUPPORTS
CATALYSTS
CHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
PARAMETRIC ANALYSIS
PH VALUE
PHYSICAL PROPERTIES
RUTHENIUM OXIDES
SOLAR ENERGY CONVERSION
SURFACE PROPERTIES
TITANIUM OXIDES
ULTRAVIOLET RADIATION
CHALCOGENIDES
CHEMICAL REACTIONS
CONVERSION
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY CONVERSION
HYDROGEN COMPOUNDS
KINETICS
METALS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PLATINUM METALS
RADIATIONS
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
RUTHENIUM COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
080106* - Hydrogen- Production- Biosynthesis & Photochemical Processes