6533b86dfe1ef96bd12caa0f

RESEARCH PRODUCT

Enhancement of photoelectrochemical activity for water splitting by controlling hydrodynamic conditions on titanium anodization

Rita Sánchez TovarD.m. García-garcíaJosé García-antónR.m. Fernández-domene

subject

NanotubeNanostructureMaterials scienceAnalytical chemistryEnergy Engineering and Power Technologychemistry.chemical_elementElectrolyteINGENIERIA QUIMICAsymbols.namesakeElectrochemical Impedance SpectroscopyElectrical and Electronic EngineeringPhysical and Theoretical ChemistryWater splittingTiO2 nanostructuresRenewable Energy Sustainability and the EnvironmentAnodizingTitaniDielectric spectroscopyHydrodynamic conditionsElectroquímicaChemical engineeringchemistrysymbolsWater splittingMott–Schottky analysisAnodizationRaman spectroscopyTitanium

description

This work studies the electrochemical and photoelectrochemical properties of a new type of TiO2 nanostructure (nanosponge) obtained by means of anodization in a glycerol/water/NH4F electrolyte under controlled hydrodynamic conditions. For this purpose different techniques such as Scanning Electronic Microscopy (SEM), Raman Spectroscopy, Electrochemical Impedance Spectroscopy (EIS) measurements, Mott–Schottky (M−S) analysis and photoelectrochemical water splitting tests under standard AM 1.5 conditions are carried out. The obtained results show that electron–hole separation is facilitated in the TiO2 nanosponge if compared with highly ordered TiO2 nanotube arrays. As a result, nanosponges enhance the photoelectrochemical activity for water splitting.

yearjournalcountryeditionlanguage
2015-01-01
10.1016/j.jpowsour.2015.03.174https://hdl.handle.net/10550/76836