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- Title
Increased Water Reduction Efficiency of Polyelectrolyte-Bound Trimetallic [Ru,Rh,Ru] Photocatalysts in Air-Saturated Aqueous Solutions.
- Authors
Canterbury, Theodore R.; Arachchige, Shamindri M.; Moore, Robert B.; Brewer, Karen J.
- Abstract
The groundbreaking use of polyelectrolytes to increase the efficiency of supramolecular photocatalysts in solar H2 production schemes under aqueous aerobic conditions is reported. Supramolecular photocatalysts of the architecture [{(TL)2Ru(BL)}2RhX2]5+ (BL=bridging ligand, TL=terminal ligand, X=halide) demonstrate high efficiencies in deoxygenated organic solvents but do not function in air-saturated aqueous solution because of the quenching of the metal-to-ligand charge-transfer (MLCT) excited state under these conditions. The new photocatalytic system incorporates poly(4-styrenesulfonate) (PSS) into aqueous solutions containing [{(bpy)2Ru(dpp)}2RhCl2]5+ (bpy=2,2′-bipyridine, dpp=2,3-bis(2-pyridyl)pyrazine). PSS has a profound impact on the photocatalyst efficiency, increasing H2 production over three times that of deoxygenated aqueous solutions alone. H2 photocatalysis proceeds even under aerobic conditions for PSS-containing solutions, an exciting consequence for solar hydrogen-production research.
- Subjects
POLYELECTROLYTES; PHOTOCATALYSTS; SATURATION (Chemistry); ANALYTICAL chemistry; AQUEOUS solutions; SUPRAMOLECULAR chemistry; CHARGE transfer
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 43, p13010
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201506567