Pt-TiO₂ catalysts for glycerol photoreforming: comparison of anatase, brookite and rutile polymorphs

We compared the H-2 production from glycerol photoreforming for different TiO2 polymorphs, highlighting an increase of activity in the order Pt-rutile < Pt-P25 approximate to Pt-anatase < Pt-brookite with a different distribution of the reaction intermediates. We show that the highest ability to adsorb water and the different distribution of Pt active sites in brookite can positively influence its photoactivity.