scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Defects on surfaces

01 Mar 1988-Bulletin of Materials Science (Springer India)-Vol. 10, Iss: 1, pp 161-172
TL;DR: A brief review of various types of defects on surfaces and their role in surface reactions is presented in this article, with particular emphasis on defects like steps/kinks and additives (promoters and poison).
Abstract: A brief review of various types of defects on surfaces and their role in surface reactions is presented. Particular emphasis is given on defects like steps/kinks and additives (promoters and poison).
Citations
More filters
Journal ArticleDOI
TL;DR: In this paper, a density functional theory study has been carried out to investigate the hydration kinetics of periclase (MgO) through the interaction between water and pericloase (0, 0, 1) and (1, 1, 1), 1) surfaces.

4 citations

References
More filters
Journal ArticleDOI
H-W Fink1
TL;DR: By field-ion microscopy techniques, stable tips whose very ends are made up of just one individual atom are created, deposited from the gas phase onto an upper terrace of a pyramidal (111)-oriented tungsten tip.
Abstract: By field-ion microscopy techniques, we have been able to create stable tips whose very ends are made up of just one individual atom, deposited from the gas phase onto an upper terrace of a pyramidal (111)-oriented tungsten tip. The first three layers of the tip consist of one, three, and seven atoms, respectively. Consequences of these observations for the understanding of energy transfer between gas-phase atoms and a solid surface are also discussed.

282 citations

Journal ArticleDOI
TL;DR: In this article, the authors report selfconsistent linearized-augmented-plane-wave calculations of the electronic structure perturbations induced by a catalytic "poison,'' S, on a Rh(001) surface, focusing particularly on their distance dependence.
Abstract: The authors report self-consistent linearized-augmented-plane-wave calculations of the electronic structure perturbations induced by a catalytic ''poison,'' S, on a Rh(001) surface, focusing particularly on their distance dependence. The S-induced charge density vanishes beyond the immediately adjacent Rh atoms. However, the Fermi-level density of states, which is not screened, and which governs the ability of the surface to respond to the presence of other species, is substantially reduced by the S even at nonadjacent sites.

227 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigated the reconstruction of the Au(100) surface with scanning tunneling microscopy and described the measured corrugation pattern by an isotropically contracted and slightly rotated, buckled hexagonal top layer, forming an incommensurate Au on Au structure.

218 citations

Journal ArticleDOI
TL;DR: In this paper, the authors evaluated the electronic perturbations induced on a thin Rh(001) film by the adsorption of 1/4 monolayer coverages of P, S, Cl or Li atoms.

203 citations

Journal ArticleDOI
TL;DR: In this paper, the role of potassium promoters in Ni(100) catalysts for CO hydrogenation has been studied, and the activation energy for methanation ( ∼ 25 kcal mole −1 ) does not depend upon potassium coverage, suggesting that K changes neither the reaction mechanism nor the rate limiting step.

147 citations