title: Noble metal-based bimetallic nanoparticles: the effect of the structure on the optical, catalytic and photocatalytic properties.
abstract: Nanoparticles composed of two different metal elements show novel electronic, optical, catalytic or photocatalytic properties from monometallic nanoparticles. Bimetallic nanoparticles could show not only the combination of the properties related to the presence of two individual metals, but also new properties due to a synergy between two metals. The structure of bimetallic nanoparticles can be oriented in random alloy, alloy with an intermetallic compound, cluster-in-cluster or core-shell structures and is strictly dependent on the relative strengths of metal-metal bond, surface energies of bulk elements, relative atomic sizes, preparation method and conditions, etc. In this review, selected properties, such as structure, optical, catalytic and photocatalytic of noble metals-based bimetallic nanoparticles, are discussed together with preparation routes. The effects of preparation method conditions as well as metal properties on the final structure of bimetallic nanoparticles (from alloy to core-shell structure) are followed. The role of bimetallic nanoparticles in heterogeneous catalysis and photocatalysis are discussed. Furthermore, structure and optical characteristics of bimetallic nanoparticles are described in relation to the some features of monometallic NPs. Such a complex approach allows to systematize knowledge and to identify the future direction of research.
authors.affiliation: Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63 Str., 80-308 Gdansk, Poland. Electronic address: adriana.zaleska@ug.edu.pl.
authors.forename: Adriana
authors.initials: A
authors.lastname: Zaleska-Medynska
authors.affiliation: Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63 Str., 80-308 Gdansk, Poland.
authors.forename: Martyna
authors.initials: M
authors.lastname: Marchelek
authors.affiliation: Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63 Str., 80-308 Gdansk, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Diak
authors.affiliation: Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza 63 Str., 80-308 Gdansk, Poland.
authors.forename: Ewelina
authors.initials: E
authors.lastname: Grabowska
keywords: Alloys; Bimetallic nanoparticles; Catalysis; Core–shell; Noble metal; Photocatalysis; Surface plasmon resonance (SPR)