Solar-fuel synthesis based on colloidal and particulate semiconductors. Annual report (3rd) August 1, 1985-July 31, 1986

Technical Report · Wed Jan 01 00:00:00 EST 1986

OSTI ID:7060413

Frank, A J; Graetzel, M

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
• Resource Relation: Other Information: See also report dated 15 Aug 85, PB86-132826
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
14 SOLAR ENERGY
HYDROGEN PRODUCTION
PHOTOCHEMICAL REACTIONS
SOLAR ENERGY
FUELS
HYDROGEN
LIGANDS
WATER
CHEMICAL REACTIONS
ELEMENTS
ENERGY
ENERGY SOURCES
HYDROGEN COMPOUNDS
NONMETALS
OXYGEN COMPOUNDS
RENEWABLE ENERGY SOURCES
080104* - Hydrogen- Production- Water Gas Processes
140505 - Solar Energy Conversion- Photochemical
Photobiological
& Thermochemical Conversion- (1980-)