Au/TiO 2 , Au 0.75 Cu 0.25 /TiO 2 , Au 0.5 Cu 0.5 /TiO 2 and Au 0.25 Cu 0.75 /TiO 2 photocatalysts prepared from preformed Au and Au-Cu alloy nanoparticles of controlled composition and size were loaded over ceramic honeycombs (2 mg cm -2 ) and tested in an optical fiber photoreactor illuminated with UV LEDs (2.6 mW cm -2 ) to continuously produce hydrogen from water and ethanol mixtures in gas phase at W/F = 4 g min L -1 and 298 K (where W is the weight of the catalyst and F is the flow rate). The photocatalytic honeycombs were characterized by high resolution transmission electron microscopy, highangle annular dark-field imaging, energy dispersive X-ray, X-ray photoelectron spectroscopy, and UV-Vis spectroscopy. The yield of hydrogen generation was Au 0.75 Cu 0.25 / TiO 2 [ Au 0.5 Cu 0.5 /TiO 2 * Au/TiO 2 [ Au 0.25 Cu 0.75 /TiO 2 ) bare TiO 2 , thus demonstrating that the addition of small quantities of copper to conventional TiO 2 -supported gold photocatalysts promotes the photocatalyic activity, likely by providing effective charge transfer between Au and Cu in the alloy nanoparticles.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.