The role of adsorbate structure in the photodissociation dynamics of adsorbed species: Methyl iodide/MgO(100)

1995 ◽  
Vol 102 (18) ◽  
pp. 7267-7276 ◽  
Author(s):  
D. Howard Fairbrother ◽  
K. A. Briggman ◽  
P. C. Stair ◽  
Eric Weitz
Keyword(s):  
Methyl Iodide ◽  
Adsorbed Species ◽  
Adsorbate Structure

scholarly journals Effects of the Interfacial Structure on the Methanol Oxidation on Platinum Single Crystal Electrodes

Surfaces ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 177-192 ◽  
Author(s):  
Mohammad Kamyabi ◽  
Ricardo Martínez-Hincapié ◽  
Juan Feliu ◽  
Enrique Herrero
Keyword(s):  
Single Crystal ◽  
Methanol Oxidation ◽  
Interfacial Structure ◽  
Direct Oxidation ◽  
Adsorbed Species ◽  
Oxidation Of Methanol ◽  
Methanol Solutions ◽  
Platinum Single Crystal ◽  
The Right

Methanol oxidation has been studied on low index platinum single crystal electrodes using methanol solutions with different pH (1–5) in the absence of specific adsorption. The goal is to determine the role of the interfacial structure in the reaction. The comparison between the voltammetric profiles obtained in the presence and absence of methanol indicates that methanol oxidation is only taking place when the surface is partially covered by adsorbed OH. Thus, on the Pt(111) electrode, the onset for the direct oxidation of methanol and the adsorption of OH coincide. In this case, the adsorbed OH species are not a mere spectator, because the obtained results for the reaction order for methanol and the proton concentrations indicate that OH adsorbed species are involved in the reaction mechanism. On the other hand, the dehydrogenation step to yield adsorbed CO on the Pt(100) surface coincides with the onset of OH adsorption on this electrode. It is proposed that adsorbed OH collaborates in the dehydrogenation step during methanol oxidation, facilitating either the adsorption of the methanol in the right configuration or the cleavage of the C—H bond.

Role of adsorbate structure in the dynamics of surface photodissociation

1995 ◽  
Author(s):  
D. Howard Fairbrother ◽  
Victor P. Holbert ◽  
Kimberly A. Briggman ◽  
Peter C. Stair ◽  
Eric Weitz
Keyword(s):  
Adsorbate Structure

scholarly journals On the Structural Stability of MXene and the Role of Transition Metal Adatoms

Nanoscale ◽  
2018 ◽  
Vol 10 (23) ◽  
pp. 10850-10855 ◽  
Author(s):  
Justinas Palisaitis ◽  
Ingemar Persson ◽  
Joseph Halim ◽  
Johanna Rosen ◽  
Per O. Å. Persson
Keyword(s):  
Transition Metal ◽  
Structural Stability ◽  
Adsorbed Species ◽  
Over Time

We investigated the presence of adsorbed species on Nb2C MXene surfaces and their influence on the structural stability over time.

scholarly journals Location of O-methyl sugars in antigenic (lipo-)polysaccharides of photosynthetic bacteria and cyanobacteria

1978 ◽  
Vol 171 (2) ◽  
pp. 403-408 ◽  
Author(s):  
R N Tharanathan ◽  
H Mayer
Keyword(s):  
Cell Surface ◽  
Methyl Iodide ◽  
Photosynthetic Bacteria ◽  
Dry Weight ◽  
Methylation Analysis ◽  
Lipophilic Character

An attempt was made to localize a number of O-methyl sugars in lipopolysaccharides and antigenic polysaccharides isolated from photosynthetic bacteria and from cyano-bacteria. Methylation analysis with [2H3]methyl iodide as methylating agent was the method of choice. One has to differentiate between (lipo-)polysaccharides having only trace amounts (less than 1% of polymer dry weight) of O-methyl sugars and those having them in larger amounts (more than 4% of polymer dry weight). In the former case O-methyl sugars occupy either non-reducing or reducing terminals. When present in larger quantities they may be present as part of each repeating unit either in chain-linked or in terminal positions or in both. A possible role of O-methyl sugars in biosynthesis of O-chains, and their contribution to the lipophilic character of the cell surface are discussed.

Role of the support and of adsorbed species on the behavior of Cu-based catalysts for No conversion

1993 ◽  
Vol 17 (1-2) ◽  
pp. 159-166 ◽  
Author(s):  
G. Centi ◽  
C. Nigro ◽  
S. Perathoner ◽  
G. Stella
Keyword(s):  
Adsorbed Species ◽  
No Conversion

Methyl iodide toxicity in rat cerebellar granule cells in vitro: the role of glutathione

Toxicology ◽  
1999 ◽  
Vol 139 (1-2) ◽  
pp. 27-37 ◽  
Author(s):  
Mark P Chamberlain ◽  
Nicholas C Sturgess ◽  
Edward A Lock ◽  
Celia J Reed
Keyword(s):  
Methyl Iodide ◽  
Granule Cells ◽  
Cerebellar Granule Cells ◽  
Cerebellar Granule

scholarly journals A multifaceted role of a mobile bismuth promoter in alcohol amination over cobalt catalysts

2020 ◽  
Vol 22 (13) ◽  
pp. 4270-4278
Author(s):  
Feng Niu ◽  
Mounib Bahri ◽  
Ovidiu Ersen ◽  
Zhen Yan ◽  
Bright T. Kusema ◽  
...  
Keyword(s):  
Cobalt Catalysts ◽  
Coupling Reactions ◽  
Adsorbed Species ◽  
Amine Coupling

Bi as a mobile metal promoter on the surface of Co leads to multiple effects with enhancement of activity, selectivity and stability due to easy reduction, removal of strongly adsorbed species and suppression of amine coupling reactions.

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