Search results for "Redox couple"

showing 3 items of 3 documents

Cobalt Electrolyte/Dye Interactions in Dye-Sensitized Solar Cells: A Combined Computational and Experimental Study

2012

We report a combined experimental and computational investigation to understand the nature of the interactions between cobalt redox mediators and TiO2 surfaces sensitized by :ruthenium and organic dyes, and their impact on. the performance of the corresponding dye-sensitized solar cells (DSSCs). We : focus: on different ruthenium dyes and fully organic dyes, to understand the dramatic loss of efficiency observed for the prototype Ru(II) N719 dye in conjunction with :Cobalt: electrolytes. Both N719- and Z907-based DSSCs showed an increased lifetime in iodine-based electrolyte compared to the cobalt-based redox-shuttle; While the organic D21L6 and D25L6 cycles endowed.With long alkoxy chains,…

COLLOIDAL TIO2 FILMSinorganic chemicalsLOW QUANTUM YIELDSInorganic chemistrychemistry.chemical_element02 engineering and technologyElectrolyte010402 general chemistryPhotochemistry01 natural sciencesBiochemistryRedoxREDOX COUPLECatalysisEFFECTIVE CORE POTENTIALSDENSITY-FUNCTIONAL THEORYColloid and Surface ChemistryDENSITY-FUNCTIONAL THEORY; EFFECTIVE CORE POTENTIALS; INTRAMOLECULAR ELECTRON-TRANSFER; TRANSITION-METAL-COMPLEXES; COLLOIDAL TIO2 FILMS; LOW QUANTUM YIELDS; MOLECULAR CALCULATIONS; REDOX COUPLE; MAGNETIC-PROPERTIES; PHOTOVOLTAIC CELLSMAGNETIC-PROPERTIESPHOTOVOLTAIC CELLSLigandGeneral Chemistry021001 nanoscience & nanotechnologyMOLECULAR CALCULATIONSTRANSITION-METAL-COMPLEXES0104 chemical sciencesMarcus theoryRutheniumDye-sensitized solar cellchemistryAlkoxy groupINTRAMOLECULAR ELECTRON-TRANSFER0210 nano-technologyCobalt
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INVESTIGATION OF ELECTRODE MATERIAL-REDOX COUPLE FOR REVERSE ELECTRODYALISIS PROCESSES. PART I: IRON REDOX COUPLES.

2012

The performances of electrodialysis (ED) and reverse electrodialysis (RED) processes depend on several factors, including the nature of the electrode material and of the redox couple adopted to make possible the conversion between electric power and chemical potential. In this paper, the possible utilization of iron-based redox couples (FeCl3/FeCl2, hexacyanoferrate(III)/hexacyanoferrate(II) and Fe(III)-EDTA/Fe(II)-EDTA) on graphite and DSA electrodes for RED processes was studied by a detailed experimental investigation. The hexacyanoferrate(III)/hexacyanoferrate(II) system was stable for lonf time (more than 12 days) in the absence of light and oxygen at high redox couple concentrations a…

Electrode reactionRedox couple Iron complexesReverse ElectrodialysiElectrodialysi
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A chemical and electrochemical multivalent memory made from FeNi3-graphene nanocomposites

2014

FeNi3-graphene nanocomposites present in acetonitrile solutions a redox couple with an electrochemical hysteresis of 2.4 V between the oxidation and the reduction maxima. In view of the high energy required for the reverse transitions, they are here proposed as chemical multilevel memories: permanent, after drying, or erasable in electrolytes, respectively. Keywords: FeNi3-graphene nanocomposites, Voltammetry, Coulovoltammetry, Redox couple, Redox hysteresis

Redox hysteresisHigh energyMaterials scienceInorganic chemistryRedox coupleFeNi3-graphene nanocompositesElectrolyteElectrochemistryRedoxlcsh:ChemistryHysteresischemistry.chemical_compoundlcsh:Industrial electrochemistrylcsh:QD1-999Graphene nanocompositeschemistryChemical engineeringCoulovoltammetryElectrochemistryVoltammetryAcetonitrileVoltammetrylcsh:TP250-261Electrochemistry Communications
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