Scientists achieve perfect efficiency for water-splitting half-reaction by Lisa Zyga , Phys.org Under visible light illumination, the nanoscale photocatalysts perform the water-splitting reduction half-reaction with 100% efficiency. Credit: Lilac Amirav, Technion-Israel Institue of Technology (Phys.org)—Splitting water is a two-step process, and in a new study, researchers have performed one of th