Modification of Nanocrystalline WO3 with a Dicationic Perylene Bisimide: Applications to Molecular Level Solar Water Splitting

6533b7defe1ef96bd1276958

RESEARCH PRODUCT

Modification of Nanocrystalline WO3 with a Dicationic Perylene Bisimide: Applications to Molecular Level Solar Water Splitting

Maurizio Prato Roberto Argazzi Stefano Caramori Zois Syrgiannis Carlo Alberto Bignozzi Vito Cristino Federico Ronconi Aurelio Bonasera

subject

Models Molecular Molecular Conformation Nanoparticle Imides Photochemistry Biochemistry Tungsten Catalysis NO Catalysi Electron Transport chemistry.chemical_compound Colloid and Surface Chemistry TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY WO3 ComputingMethodologies_SYMBOLICANDALGEBRAICMANIPULATION perylene Photoelectrochemical cell IrO2 Quenching (fluorescence)Chemistry (all)charge transfer Water Oxides General Chemistry Photoelectrochemical cell Photochemical Processes Solar fuel Chemistry (all); Catalysis; Biochemistry; Colloid and Surface Chemistry Nanocrystalline material perylene WO3 charge transfer IrO2 Microsecond chemistry Water Splitting Sunlight VISIBLE-LIGHT; ARTIFICIAL PHOTOSYNTHESIS; PHOTOELECTROCHEMICAL CELL; OXIDATION CATALYSTS; ELECTRON-TRANSFER; FABRICATION Nanoparticles Perylene bisimide Water splitting Perylene MathematicsofComputing_DISCRETEMATHEMATICS

description

[(N,N?-Bis(2-(trimethylammonium)ethylene) perylene 3,4,9,10-tetracarboxylic acid bisimide)(PF6)2] (1) was observed to spontaneously adsorb on nanocrystalline WO3 surfaces via aggregation/hydrophobic forces. Under visible irradiation (? > 435 nm), the excited state of 1 underwent oxidative quenching by electron injection (kinj > 108 s-1) to WO3, leaving a strongly positive hole (Eox ? 1.7 V vs SCE), which allows to drive demanding photo-oxidation reactions in photoelectrochemical cells (PECs). The casting of IrO2 nanoparticles (NPs), acting as water oxidation catalysts (WOCs) on the sensitized electrodes, led to a 4-fold enhancement in photoanodic current, consistent with hole transfer from oxidized dye to IrO2 occurring on the microsecond time scale. Once the interaction of the sensitizer with suitable WOCs is optimized, 1/WO3 photoanodes may hold potentialities for the straightforward building of molecular level devices for solar fuel production.

year	journal	country	edition	language
2015-01-01

10.1021/jacs.5b01519 http://www.cnr.it/prodotto/i/343045