Chiral [Mo3S4H3(diphosphine)3]+Hydrido Clusters and Study of the Effect of the Metal Atom on the Kinetics of the Acid-Assisted Substitution of the Coordinated Hydride: Mo vs W

2010 ◽  
Vol 49 (13) ◽  
pp. 5935-5942 ◽  
Author(s):  
Andrés G. Algarra ◽  
Manuel G. Basallote ◽  
M. Jesús Fernández-Trujillo ◽  
Marta Feliz ◽  
Eva Guillamón ◽  
...  
Keyword(s):  
Metal Atom ◽  
Kinetics Of

Kinetics of Metal Atom Oxidation Reactions

1972 ◽  
Author(s):  
Arthur Fontijn ◽  
William Felder ◽  
James J. Houghton
Keyword(s):  
Metal Atom ◽  
Oxidation Reactions ◽  
Kinetics Of

Metal complex catalyzed reactions of anils. III. Kinetic and mechanistic studies

1977 ◽  
Vol 55 (12) ◽  
pp. 2432-2441 ◽  
Author(s):  
A. R. Boate ◽  
D. R. Eaton
Keyword(s):  
Aqueous Solution ◽  
Metal Complex ◽  
Metal Atom ◽  
Nucleophilic Attack ◽  
Mechanistic Studies ◽  
Acetone Molecule ◽  
Rate Determining Step ◽  
Catalyzed Reactions ◽  
Kinetics Of ◽  
Hydrolysis Of

The kinetics of the homogeneously catalyzed formation and hydrolysis of anils in non-aqueous solution have been studied. The catalysts used are zinc complexes of thiourea. It is shown that all the evidence obtained, kinetic and otherwise, is consistent with a model in which the rate determining step for anil formation is nucleophilic attack by an aniline held in the second coordination sphere of the metal complex on an acetone molecule directly bound to the metal atom. Analogous mechanisms are suggested for anil hydrolysis and for transimination.

Reactivity of 4Fe+(CO)n=0–2 + O2: oxidation of CO by O2 at an isolated metal atom

2017 ◽  
Vol 19 (13) ◽  
pp. 8768-8777 ◽  
Author(s):  
Shaun G. Ard ◽  
Oscar Martinez ◽  
Steven A. Brown ◽  
Jordan C. Sawyer ◽  
P. B. Armentrout ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Noble Metal ◽  
Metal Atom ◽  
Bond Cleavage ◽  
Oxidation Of Co ◽  
Kinetics Of

The kinetics of Fe+(CO)n + O2 yield insight on the mechanism of O2 bond cleavage and CO oxidation occurring at a single non-noble metal atom.

Graphene supported single metal atom catalysts for efficient hydrogen oxidation reaction in alkaline media

2021 ◽  
Author(s):  
Lianming Zhao ◽  
Xiaonan Han ◽  
Weichao Kong ◽  
Yanfu Tong ◽  
Yanping Ding ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Metal Atom ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Alkaline Media ◽  
Single Atom ◽  
Alkaline Fuel Cell ◽  
Hydrogen Oxidation Reaction ◽  
Kinetics Of

The sluggish kinetics of the hydrogen oxidation reaction (HOR) results in an ultra-high Pt loading on the anode of alkaline fuel cell (AFC) systems. The single-atom catalyst (SAC) can maximize...

Direct observations of radiation-enhanced transformations in glass

1983 ◽  
Vol 41 ◽  
pp. 354-355
Author(s):  
J. F. DeNatale ◽  
D. G. Howitt
Keyword(s):  
Glass Matrix ◽  
Diffusion Mechanism ◽  
Bubble Formation ◽  
Silicate Glasses ◽  
Phase Decomposition ◽  
Direct Observations ◽  
Thin Foils ◽  
Oxygen Bubble ◽  
Electron Energy Loss ◽  
Kinetics Of

The electron irradiation of silicate glasses containing metal cations produces various types of phase separation and decomposition which includes oxygen bubble formation at intermediate temperatures figure I. The kinetics of bubble formation are too rapid to be accounted for by oxygen diffusion but the behavior is consistent with a cation diffusion mechanism if the amount of oxygen in the bubble is not significantly different from that in the same volume of silicate glass. The formation of oxygen bubbles is often accompanied by precipitation of crystalline phases and/or amorphous phase decomposition in the regions between the bubbles and the detection of differences in oxygen concentration between the bubble and matrix by electron energy loss spectroscopy cannot be discerned (figure 2) even when the bubble occupies the majority of the foil depth.The oxygen bubbles are stable, even in the thin foils, months after irradiation and if van der Waals behavior of the interior gas is assumed an oxygen pressure of about 4000 atmospheres must be sustained for a 100 bubble if the surface tension with the glass matrix is to balance against it at intermediate temperatures.

Irradiation behavior of pyrolytic silicon carbide

1983 ◽  
Vol 41 ◽  
pp. 72-73
Author(s):  
R. J. Lauf
Keyword(s):  
Silicon Carbide ◽  
Fission Products ◽  
Thermodynamics And Kinetics ◽  
Neutron Fluences ◽  
Fuel Particles ◽  
Sic Coatings ◽  
Irradiation Behavior ◽  
Kinetics Of ◽  
Htgr Fuel

Fuel particles for the High-Temperature Gas-Cooled Reactor (HTGR) contain a layer of pyrolytic silicon carbide to act as a miniature pressure vessel and primary fission product barrier. Optimization of the SiC with respect to fuel performance involves four areas of study: (a) characterization of as-deposited SiC coatings; (b) thermodynamics and kinetics of chemical reactions between SiC and fission products; (c) irradiation behavior of SiC in the absence of fission products; and (d) combined effects of irradiation and fission products. This paper reports the behavior of SiC deposited on inert microspheres and irradiated to fast neutron fluences typical of HTGR fuel at end-of-life.

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