Local atomic order in low Pt-content nanocatalysts investigatedin situby XAS

Ultrathin Coating of Confined Pt Nanocatalysts by Atomic Layer Deposition for Enhanced Catalytic Performance in Hydrogenation Reactions.

Metal-support interfaces play a prominent role in heterogeneous catalysis. However, tailoring the metal-support interfaces to realize full utilization remains a major challenge. In this work, we propose a graceful strategy to maximize the metal-oxide interfaces by coating confined nanoparticles with an ultrathin oxide layer. This is achieved by sequential deposition of ultrathin Al2 O3 coats, P...

Tunable Pt nanocatalysts for the aerobic selox of cinnamyl alcohol.

The selective aerobic oxidation of cinnamyl alcohol over Pt nanoparticles has been tuned via the use of mesoporous silica supports to control their dispersion and oxidation state. High area two-dimensional SBA-15, and three-dimensional, interconnected KIT-6 silica significantly enhance Pt dispersion, and thus surface PtO2 concentration, over that achievable via commercial low surface area silic...

Local structure of random InxGa1 xAs alloys by full-profile fitting of atomic pair distribution functions

The local structure of random InxGa1 xAs alloys has been refined by fitting experimental high-resolution atomic pair distribution functions with the 8-atom unit cell of the zinc-blende lattice. Both metal and As atoms have been allowed to move off their ideal positions and so the local structural disorder due to the presence of two distinct bond lengths, Ga–As and In–As, has been quantified. It...

Efficient decomposition of formaldehyde at room temperature over Pt/honeycomb ceramics with ultra-low Pt content.

Pt/honeycomb ceramic (Pt/HC) catalysts with ultra-low Pt content (0.005-0.055 wt%) were for the first time prepared by an impregnation of honeycomb ceramics with Pt precursor and NaBH4-reduction combined method. The microstructures, morphologies and textural properties of the resulting samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), a...

Origin of the interlayer exchange coupling in [Co/Pt]/NiO/ [Co/Pt] multilayers studied with XAS, XMCD, and micromagnetic modeling