Experimental and theoretical study of a surface stabilized monolayer phase of nickel oxide on Pd(100)

Article Abstract:

A surface stabilized monolayer phase of nickel oxide, c(4 x 2)-Ni (sub 3)O(sub 4), is found to grow expitaxially under reactive deposition conditions on Pd(100), in presence of other absorbed phases and in competition with them. Pd takes no active part in the growth of that phase, but its role is vital for two aspects, one is provision of an oxygen chemisorption structure with a distribution and density of surface oxygens, and, secondly, interaction with the absorbed species to make the formation reaction feasible.

Analysis, Monomolecular films, Epitaxy

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Proton diffusion determination and dual structure model for nickel hydroxide based on potential step measurements on single spherical beads

Article Abstract:

Potential step measurement is performed on single beads of spherical nickel hydroxide to determine the proton diffusion coefficient (D) and concentration of the effective proton vacancies (C). The semi-infinite diffusion equation for the initial stage and the finite diffusion equation for the long-term of the current response to potential step are used for deducing the D and C values.

Chemical reactions, Hydroxides

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Ab initio simulation of carbon clustering on an Ni(111) surface: A model of the poisoning of nickel-based catalysts

Article Abstract:

A study of the poisoning of the nickel(111) surface due to the formation of carbon clusters is illustrated. The Ni(111) surface is a particularly favorable surface to create a graphene overlayer since there is a good geometrical matching between the lattice parameters of Ni(111) and the graphene monolayer.

Clusters (Chemistry), Structure

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