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In$_2$O$_3$-based catalysts have shown high activity and selectivity for CO$_2$ hydrogenation to methanol, however the origin of the high performance of In$_2$O$_3$ is still unclear. To elucidate the initial steps of CO$_2$ hydrogenation…

The structural, vibrational, energetic and electronic properties of hydrogen at the stoichiometric RuO2(110) termination are studied using density functional theory. The oxide surface is found to stabilize both molecular and dissociated H2.…

Materials Science · Physics 2007-05-23 Qiang Sun , Karsten Reuter , Matthias Scheffler

At the high densities and low temperatures found in star forming regions, all molecules other than H2 should stick on dust grains on timescales shorter than the cloud lifetimes. Yet these clouds are detected in the millimeter lines of…

The adsorption kinetics of the cationic surfactant dodecyltrimethylammonium bromide at the air-water interface has been studied by the maximum bubble pressure method at concentrations below the critical micellar concentration. At short…

Soft Condensed Matter · Physics 2011-03-25 Hernan Ritacco , Dominique Langevin , Haim Diamant , David Andelman

The electronic structure and optical absorption spectrum of V^{0} and V^{-} center in MgO are investigated using first-principles calculations based on density functional theory. It is demonstrated that the configuration with distortion is…

Materials Science · Physics 2017-03-16 Jie Zhang , Xian Long Wang , Kai Shuai Yang , Ya Cheng , Chuan Guo Zhang , Zhi Zeng , Xian Ming Zhou , Hai Qing Lin

It is commonly believed that organic molecules are physisorbed on the ideal non-polar surfaces of wide band gap insulators with limited variation of the electronic properties of the adsorbate molecule. On the basis of first principles…

Materials Science · Physics 2010-06-10 Wei Chen , Christoph Tegenkamp , Herbert Pfnür , Thomas Bredow

Molecular clouds are the cold regions of the Milky Way where stars form. They are enriched by rather complex molecules. Many of these molecules are believed to be synthesized on the icy surfaces of the interstellar submicron-sized dust…

Astrophysics of Galaxies · Physics 2020-07-08 Stefano Pantaleone , Joan Enrique-Romero , Cecilia Ceccarelli , Piero Ugliengo , Nadia Balucani , Albert Rimola

Surface states refer to electronic states emerging as a solid material terminates at a surface, and can be present in many systems. Despite their spatial proximity to material surfaces, surface states have been largely overlooked in…

Materials Science · Physics 2013-05-29 Hua Chen , Wenguang Zhu , Di Xiao , Zhenyu Zhang

Surface chemistry on interstellar dust grains is recognized as a central component in astrochemical models, representing a plausible formation route for many of the observed complex molecular species. However, key parameters governing…

Astrophysics of Galaxies · Physics 2026-01-22 Francesco Benedetti , Mauro Satta , Tommaso Grassi , Stefan Vogt-Geisse , Stefano Bovino

In this study, we investigated the physisorption mechanisms of O2, H2O, CH4, and CO2 molecules on alumina and their effect on electronic properties. We employed quantum-classical molecular dynamics simulations and the self-consistent-charge…

In surface catalysis, the adsorption of carbon monoxide on transition-metal electrodes represents the prototype of strong chemisorption. Notwithstanding significant changes in the molecular orbitals of adsorbed CO, spectroscopic experiments…

Materials Science · Physics 2015-06-05 Ismaila Dabo

We show, with both experiment and theory, that adsorption of $CO_2$ is sensitive to charge on a capturing model carbonaceous surface. In the experiment we dope superfluid helium droplets with $C_{60}$ and $CO_2$ and expose them to ionising…

Atomic and Molecular Clusters · Physics 2016-09-06 Stefan Ralser , Alexander Kaiser , Michael Probst , Johannes Postler , Michael Renzler , Diethard K. Bohme , Paul Scheier

In ceria-based catalysis, the shape of the catalyst particle, which determines the exposed crystal facets, profoundly affects its reactivity. The vibrational frequency of adsorbed carbon monoxide (CO) can be used as a sensitive probe to…

Molecular adsorbates on metal surfaces exchange energy with substrate phonons and low-lying electron-hole pair excitations. In the limit of weak coupling, electron-hole pair excitations can be seen as exerting frictional forces on…

Materials Science · Physics 2016-09-28 Reinhard J. Maurer , Mikhail Askerka , Victor S. Batista , John C. Tully

We consider a Hubbard-Anderson model which describes localized orbitals in five different sites hybridized both among themselves and with a continuum of extended states. A square planar geometry with an atom at the center is used to…

Strongly Correlated Electrons · Physics 2011-06-24 M. Romero , A. A. Aligia

Experiments on the hydrogenation of CO on crystalline and amorphous ice at 15 K were carried out to investigate the structural effects of the ice surface. The effective rate of H atom addition to CO on the amorphous ice was found to be…

Astrophysics · Physics 2008-05-23 H. Hidaka , N. Miyauchi , A. Kouchi , N. Watanabe

Equilibrium atomic configurations and electron energy structure of ethanol adsorbed on the Si (111) surface are studied by the first-principles density functional theory. Geometry optimization is performed by the total energy minimization…

Computational Physics · Physics 2008-02-11 A. V. Gavrilenko , C. E. Bonner , V. I. Gavrilenko

Low-energy structures of a hybrid system consisting of a polymer and an attractive nanowire substrate as well as the thermodynamics of the adsorption transition are studied by means of Monte Carlo computer simulations. Depending on…

Soft Condensed Matter · Physics 2011-07-05 Thomas Vogel , Michael Bachmann

The geometrical and electronic properties of the monolayer (ML) of tetracene (Tc) molecules on Ag(111) are systematically investigated by means of DFT calculations with the use of localized basis set. The bridge and hollow adsorption…

Mesoscale and Nanoscale Physics · Physics 2016-11-09 N. L. Zaitsev , I. A. Nechaev , U. Höfer , E. V. Chulkov

The moir\'e superstructure of graphene grown on metals can drive the assembly of molecular architectures, as iron-phthalocyanine (FePc) molecules, allowing for the production of artificial molecular configurations. A detailed analysis of…

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