Solar-fuel synthesis based on colloidal and particulate semiconductors. Annual report (3rd) August 1, 1985-July 31, 1986
A new molecular water-oxidation catalyst that exhibits good durability and high activity is discussed. The catalyst is an oxo-bridged ruthenium dimer with 5,5'-dicarboxy-2,2'-bipyridyl ligands. The dimer is generated in situ from cis-RuL2(OH/sub 2/)/sub 3/. Mechanistic information has been obtained on H/sub 2/ production from water with (Pt(bpy)/sub 2/)(Pt(CN)/sub 4/) and the H/sub 2/ yield has been improved substantially. New linear chain compounds, having improved characteristics, were synthesized. Charged interfaces in colloidal semiconductor systems with appropriate electron relays improve dramatically charge separation and photosensitized H/sub 2/ evolution from water. The activity of surface-modified anatase particles was tested for water-splitting in a solar reactor. The activity of a new rhenium-based catalyst largely exceeds that of other noble metals commonly used to promote the photocleavage of H/sub 2/S. The activity of a tungstosilicic acid coating is found to be comparable to that of Pt for H/sub 2/ production.
- Research Organization:
- Solar Energy Research Inst., Golden, CO (USA)
- OSTI ID:
- 7060413
- Report Number(s):
- PB-87-144333/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved charge separation and photosensitized H/sub 2/ evolution from water with TiO/sub 2/ particles on colloidal SiO/sub 2/ carriers
A molecular water-reduction catalyst: Surface derivatization of TiO sub 2 colloids and suspensions with a platinum complex
Related Subjects
080104* -- Hydrogen-- Production-- Water Gas Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
CHEMICAL REACTIONS
ELEMENTS
ENERGY
ENERGY SOURCES
FUELS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
LIGANDS
NONMETALS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
RENEWABLE ENERGY SOURCES
SOLAR ENERGY
WATER