HYDROGEN EVOLUTION ON SURFACE-MODIFIED SILICON POWDER PHOTOCATALYSTS IN AQUEOUS ETHANOL SOLUTIONS

Abstract
Illumination of n-type Si powder photocatalysts whose anodic surfaces and cathodic surfaces were coated with polypyrrole and platinized Ag, respectively, caused hydrogen evolution from aqueous ethanol for longer than 150 h with a quantum efficiency of 2.1 % at 550 nm.