Isotope effects in hydrogen adsorption on Ni(111): Direct observation of a molecular precursor state

1986 ◽  
Vol 85 (11) ◽  
pp. 6792-6802 ◽  
Author(s):  
J. N. Russell ◽  
S. M. Gates ◽  
J. T. Yates
Keyword(s):  
Direct Observation ◽  
Hydrogen Adsorption ◽  
Isotope Effects ◽  
Precursor State ◽  
Molecular Precursor

Atomically Smooth Ultrathin Oxide Layers on SI(113)

1999 ◽  
Vol 567 ◽  
Author(s):  
H.-J. Müssig ◽  
J. Dabrowski ◽  
S. Hinrich
Keyword(s):  
Elevated Temperatures ◽  
Oxidation Mechanism ◽  
Dissociative Chemisorption ◽  
Initial Oxidation ◽  
Precursor State ◽  
Oxide Layers ◽  
Adsorption Sites ◽  
Molecular Precursor ◽  
Diffusion Paths ◽  
Ultrathin Oxide

ABSTRACTWe report the first direct observation of dissociative chemisorption of oxygen molecules on a silicon surface at room temperature via a molecular precursor state. We link this to the fact that smooth oxide layers can be grown easily on Si(113). The process of initial oxidation is discussed in terms of surface diffusion paths and surface stress. First ab initiocalculations help elucidate the favored adsorption sites and the oxidation mechanism. Experimental evidence was found for bond geometries resulting in the quasi-epitaxial growth of a chemisorption layer on the substrate at elevated temperatures (600°C). In contrast to the first stages of Si(001) oxidation, neither defects nor the ejection of Si atoms plays a significant role during the initial oxidation of Si(113).

Direct observation and modelling of ordered hydrogen adsorption and catalyzed ortho–para conversion on ETS-10 titanosilicate material

2007 ◽  
Vol 9 (21) ◽  
pp. 2753-2760 ◽  
Author(s):  
Gabriele Ricchiardi ◽  
Jenny G. Vitillo ◽  
Donato Cocina ◽  
Evgueni N. Gribov ◽  
Adriano Zecchina
Keyword(s):  
Direct Observation ◽  
Hydrogen Adsorption

Isotope effects and the manifestation of 2D phase transitions in the kinetics of low-temperature (down to 5 K) hydrogen adsorption

2001 ◽  
Vol 27 (9) ◽  
pp. 843-849 ◽  
Author(s):  
V. D. Osovskiı̆ ◽  
Yu. G. Ptushinskiı̆ ◽  
V. G. Sukretnyi ◽  
B. A. Chuı̆kov
Keyword(s):  
Phase Transitions ◽  
Low Temperature ◽  
Hydrogen Adsorption ◽  
Isotope Effects ◽  
Kinetics Of

Mechanisms of N-Demethylations Catalyzed by High-Valent Species of Heme Enzymes:  Novel Use of Isotope Effects and Direct Observation of Intermediates

1998 ◽  
Vol 120 (41) ◽  
pp. 10762-10763 ◽  
Author(s):  
Yoshio Goto ◽  
Yoshihito Watanabe ◽  
Shunichi Fukuzumi ◽  
Jeffrey P. Jones ◽  
Joseph P. Dinnocenzo
Keyword(s):  
Direct Observation ◽  
Isotope Effects ◽  
Heme Enzymes ◽  
High Valent

Infrared studies of isotope effects for hydrogen adsorption on zinc oxide

1972 ◽  
Vol 94 (13) ◽  
pp. 4429-4436 ◽  
Author(s):  
R. J. Kokes ◽  
A. L. Dent ◽  
C. C. Chang ◽  
L. T. Dixon
Keyword(s):  
Zinc Oxide ◽  
Hydrogen Adsorption ◽  
Isotope Effects ◽  
Infrared Studies

The role of the precursor state and the mutual interaction in hydrogen adsorption on thin iron films

1985 ◽  
Vol 151 (2-3) ◽  
pp. L166-L170 ◽  
Author(s):  
E. Nowicka ◽  
Z. Wolfram ◽  
W. Lisowski ◽  
R. Duś
Keyword(s):  
Hydrogen Adsorption ◽  
Mutual Interaction ◽  
Iron Films ◽  
Precursor State
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