Open Access BASE2015

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

Sánchez Tovar, Rita; Fernández Domene, Ramón Manuel; García-García, D.M; García Antón, José

Open Access

Abstract

224 231 286 ; S ; 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. Authors would like to express their gratitude for their financial support to the Generalitat Valenciana (PROMETEOII/2014/009), to Fundacion Iberdrola and to the Universitat Politecnica de Valencia. Sánchez Tovar, R.; Fernández Domene, RM.; García-García, D.; García Antón, J. (2015). Enhancement of photoelectrochemical activity for water splitting by controlling hydrodynamic conditions on titanium anodization. Journal of Power Sources. 286:224-231. doi:10.1016/j.jpowsour.2015.03.174

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