Hexanuclear iridium clusters supported on magnesium oxide
نویسندگان
چکیده
منابع مشابه
Gold nanoparticles supported on magnesium oxide for CO oxidation
Au was loaded (1 wt%) on a commercial MgO support by three different methods: double impregnation, liquid-phase reductive deposition and ultrasonication. Samples were characterised by adsorption of N2 at -96°C, temperature-programmed reduction, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction. Upon loading with Au, MgO changed into Mg(...
متن کاملCO adsorption on neutral iridium clusters
The adsorption of carbon monoxide on neutral iridium clusters in the size range of n = 3 to 21 atoms is investigated with infrared multiple photon dissociation spectroscopy. For each cluster size only a single ν(CO) band is present with frequencies in the range between 1962 cm−1 (n = 8) and 1985 cm−1 (n = 18) which can be attributed to an atop binding geometry. This behaviour is compared to the...
متن کاملStable iridium dinuclear heterogeneous catalysts supported on metal-oxide substrate for solar water oxidation.
Atomically dispersed catalysts refer to substrate-supported heterogeneous catalysts featuring one or a few active metal atoms that are separated from one another. They represent an important class of materials ranging from single-atom catalysts (SACs) and nanoparticles (NPs). While SACs and NPs have been extensively reported, catalysts featuring a few atoms with well-defined structures are poor...
متن کاملThe nucleation, growth, and stability of oxide-supported metal clusters
The optimization of oxide-supported metal clusters as heterogeneous catalysts requires a detailed understanding of the metal cluster–oxide interface. Model catalysts, prepared by deposition of a catalytically active metal onto a thin film oxide support, closely mimic real-world catalysts, yet are amenable to study using surface sensitive techniques. Surface science methods applied to model cata...
متن کاملExafs Studies of Oxide Supported Osmium Carbonyl Clusters
The reactions of triosmium carbonyl clusters on functionalised high surface area silicas have been monitored by 0s L(II1) edge EXAFS. Interaction of [OS~(CO)~~] with HS(CH2)jSIL affords HOS~(CO)~~[S(CH~)~SIL], which was structurally characterised using spherical wave methods to analyse the EXAFS data. Subsequent thermolysis in vacuo yields a new material. Coordination to " ~ 2 CO groups, 0 oxyg...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of Physical Chemistry
سال: 1991
ISSN: 0022-3654,1541-5740
DOI: 10.1021/j100176a068