The photocatalytic production of hydrogen on Pt-doped CdS/NaxH2-xTi3O7 nanotubes was investigated at circum-neutral pH in water in the presence of isoproponol. H2 production rates, Rs (in �mol-H2 h-1g-1) are found to be dependant on the Pt-loading level (a in wt%), peaking at R(a = 2)/R(a = 0) > 150.  Under optimal conditions, the rates achieved with Pt/CdS/TNTs are ~7 times larger than the corresponding rates obtained with CdS/TiO2 hybrid catalysts at the same doping levels.  Pt/CdS/TNTs hybrid catalysts are quite stable reaching a steady-state activity level after ~8 h of continuous irradiation.  In contrast, Pt/CdS/TiO2 hybrids reach peak H2 production activity after 4 h of continuous irradiation and then show a steady decreasing rate of production.  The kinetic observations appear to correlate with the relative extent of Pt(0) oxidation.

Photocatalytic hydrogen production on Pt/CdS attached to titanate nanotubes

243rd National Meeting (2012)

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