Abstract

The effect of the shape of rhodium nanoparticles impregnated on TiO(2)on photocatalytic hydrogen generation using methanol as a sacrificial reagent has been investigated by using a simple home-made UV-LED light strip reactor to activate the catalyst surface. For rhodium nanocubes, the normalised rate of H(2)production was 22.4 mmol h(-1)m(-2)at 365 nm and 7.5 mmol h(-1)m(-2)at 400 nm. The normalised activity/surface area of the studied Rh nanoparticles showed a trend that led to establishing a relationship between the exposed [100] facets and photocatalytic activity. The Rh shape-dependent H(2)production follows a trend of cubic > spherical > octahedral, which is associated with a higher surface energy of the Rh nanoparticles.