Photocatalytic activity of anatase-type TiO2 nanoparticles with different shape, prepared by gel-sol method, was evaluated Particle morphology, that is, the main surface crystal plane was found critically decisive for the photocatalytic activity for H-2 evolution from aqueous ethanol Namely, the activity of cubic particles bound by {100} and {001} faces, estimated from high-resolution TEM images. showed highest activity among one tested