TIO2 – Catalysts dopped or impregnated with Pt on hydrogen production via water disociation using heterogeneous photocatalysis
June 19-24, 2016
Alternative energies among them, hydrogen production via water dissociation using heterogeneous photocatalysis offers special promise . Currently TiO2 is the most widely used photocatalyst. In the present study, experiments of hydrogen production via water splitting were developed using a Photo CREC Water II Reactor, with a specially adapted with H2 collector tank . Ethanol 2 vol.% was employed as a renewable hole (h+) scavenger. TiO2 was doped with Pt using different loadings of Pt. The following methodologies were used: incipient impregnation, wetness impregnation and sol-gel. The prepared photo catalysts were characterized by BET, UV-Vis-diffuse reflectance, X-ray diffraction (XRD). The near UV lamp employed was characterized with a spectrophotoradiometer.
The semiconductor prepared with gol gel displayed the highest specific superficial area (125 54 m2/g) and a reduced band gap (2.7 eV versus the 3.2 eV for DP25). The quantum yield reactor efficiency (QY) for hydrogen production was calculated, using QY=[dNi/dt]/Pa x 100. In all the cases, at pH = 4, the hydrogen profiles were linear. and produced with a 1.7% Pt loading and a 17% QY. QYs were constant throughout the experiment, as a result of the zero order hydrogen formation.
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Hugo de Lasa, Benito Serrano Rosales, Alan Ruben Calzada Hernandez, Jesus Fabricio Guayaquil, and Salvador Escobedo Salas, "TIO2 – Catalysts dopped or impregnated with Pt on hydrogen production via water disociation using heterogeneous photocatalysis" in "5th International Congress on Green Process Engineering (GPE 2016)", Franco Berruti, Western University, Canada Cedric Briens, Western University, Canada Eds, ECI Symposium Series, (2016). http://dc.engconfintl.org/gpe2016/22