272 research outputs found
Au/TiO2(110) interfacial reconstruction stability from ab initio
We determine the stability and properties of interfaces of low-index Au
surfaces adhered to TiO2(110), using density functional theory energy density
calculations. We consider Au(100) and Au(111) epitaxies on rutile TiO2(110)
surface, as observed in experiments. For each epitaxy, we consider several
different interfaces: Au(111)//TiO2(110) and Au(100)//TiO2(110), with and
without bridging oxygen, Au(111) on 1x2 added-row TiO2(110) reconstruction, and
Au(111) on a proposed 1x2 TiO reconstruction. The density functional theory
energy density method computes the energy changes on each of the atoms while
forming the interface, and evaluates the work of adhesion to determine the
equilibrium interfacial structure.Comment: 20 pages, 11 figure
Thickness-Dependent Morphologies of Gold on N-Layer Graphenes
We report that gold thermally deposited onto n-layer graphenes interacts
differently with these substrates depending on the number layer, indicating the
different surface properties of graphenes. This results in thickness-dependent
morphologies of gold on n-layer graphenes, which can be used to identify and
distinguish graphenes with high throughput and spatial resolution. This
technique may play an important role in checking if n-layer graphenes are mixed
with different layer numbers of graphene with a smaller size, which cannot be
found by Raman spectra. The possible mechanisms for these observations are
discussed
High-Efficiency Photoelectrocatalytic Hydrogen Generation Enabled by Palladium Quantum Dots-Sensitized TiO 2
Kinetics of CO Oxidation Catalyzed by Supported Gold: A Tabular Summary of the Literature
?Catalytically active Au on Titania:? yet another example of a strong metal support interaction (SMSI)?
Room-Temperature Reaction of Oxygen with Gold: An In situ Ambient-Pressure X-ray Photoelectron Spectroscopy Investigation
Local Electronic Structure and Density of Edge and Facet Atoms at Rh Nanoclusters Self-Assembled on a Graphene Template
CO Oxidation Activity of Ag/TiO2 Catalysts Prepared via Oxalate Co-precipitation
Ag/TiO2 catalysts with different Ag loadings (2, 4, 7 and 10% (w/w)) have been prepared by means of co-precipitation of Ag- and TiO-oxalates followed by temperature programmed oxidation (TPO). The catalysts were subjected to CO oxidation in a flow reactor at atmospheric pressure and temperatures up to 573 K. Best conversion performance was obtained in a CO/O2 = 1:1 mixture over 10% Ag/TiO2 for which the temperature of 50% CO conversion was T50 = 333 K. The initial reaction rates were determined in a circulation reactor at low conversions and apparent activation energies between 13 and 25 kJ/mol were found for all catalysts. Transmission electron microscopy shows a broad range of nano-sized Ag particles on TiO2 (nearly pure anatase).info:eu-repo/semantics/publishe
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