The Role of Surface Defects in the Adsorption and Desorption of Hydrogen on Ni(111)

Klaus Rendulic; Adolf Winkler; Hans-Peter Steinrück

doi:10.1016/S0039-6028(87)80171-1

The Role of Surface Defects in the Adsorption and Desorption of Hydrogen on Ni(111)

Klaus Rendulic, Adolf Winkler, Hans-Peter Steinrück

Institut für Festkörperphysik (5130)

Publikation: Beitrag in einer Fachzeitschrift › Artikel › Begutachtung

Abstract

On a smooth Ni(111) surface both the β1 and the β2 state show activated adsorption. The desorption flux is highly peaked towards the surface normal. Defects introduce non-activated adsorption sites which lower the desorption temperatures in flash desorption. At the same time a cosine dependence of the desorption flux is obtained. Because of its small sticking coefficient the β1 state is already influenced by small defect concentrations; the β2 state is only affected on highly defective surfaces.

Originalsprache	englisch
Seiten (von - bis)	469-478
Fachzeitschrift	Surface Science
Jahrgang	185
Ausgabenummer	3
DOIs	https://doi.org/10.1016/S0039-6028(87)80171-1
Publikationsstatus	Veröffentlicht - 1987

Treatment code (Nähere Zuordnung)

Basic - Fundamental (Grundlagenforschung)
Experimental

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10.1016/S0039-6028(87)80171-1

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abstract = "On a smooth Ni(111) surface both the β1 and the β2 state show activated adsorption. The desorption flux is highly peaked towards the surface normal. Defects introduce non-activated adsorption sites which lower the desorption temperatures in flash desorption. At the same time a cosine dependence of the desorption flux is obtained. Because of its small sticking coefficient the β1 state is already influenced by small defect concentrations; the β2 state is only affected on highly defective surfaces.",

author = "Klaus Rendulic and Adolf Winkler and Hans-Peter Steinr{\"u}ck",

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year = "1987",

doi = "10.1016/S0039-6028(87)80171-1",

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AU - Steinrück, Hans-Peter

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PY - 1987

Y1 - 1987

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AB - On a smooth Ni(111) surface both the β1 and the β2 state show activated adsorption. The desorption flux is highly peaked towards the surface normal. Defects introduce non-activated adsorption sites which lower the desorption temperatures in flash desorption. At the same time a cosine dependence of the desorption flux is obtained. Because of its small sticking coefficient the β1 state is already influenced by small defect concentrations; the β2 state is only affected on highly defective surfaces.

U2 - 10.1016/S0039-6028(87)80171-1

DO - 10.1016/S0039-6028(87)80171-1

M3 - Article

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VL - 185

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EP - 478

JO - Surface Science

JF - Surface Science

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The Role of Surface Defects in the Adsorption and Desorption of Hydrogen on Ni(111)

Abstract

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