After the innovative method reported by Fujishima and Honda for hydrogen generation by the UV-light-induced electrochemical water splitting on TiO2 electrodes [1], many other approaches were developed using hot-carrier generation by light in various semiconductors and metallic nanostructures [2-4]. For example, as an alternative to electrochemical cell systems, semiconductor particles suspended in water became a new field of study [2], where photocatalysis takes place on the surface of the particles. Hydrogen evolution from plasmonic metal-semiconductor heterostructures has also been observed with Au nanorods partially coated with TiO2 which provide separated Au/TiO2 regions [3]. In this case, hot electrons are generated in the plasmonic Au nanorods upon light illumination and subsequently some of them filtered out through the Au/TiO2 Schottky barrier into TiO2 and become available for photoreduction.