Mechansim of propylene oxidation on modified cobalt molybdate catalysts

1977 ◽  
Vol 26 (3) ◽  
pp. 473-477
Author(s):  
M. Yu. Kutyrev ◽  
B. V. Rozentuller ◽  
O. V. Isaev ◽  
L. Ya. Margolis ◽  
O. V. Krylov
Keyword(s):  
Propylene Oxidation ◽  
Cobalt Molybdate

Dependence of the catalytic properties of cobalt molybdate in propylene oxidation on the surface reduction and oxygen bond energy

1977 ◽  
Vol 7 (2) ◽  
pp. 187-191 ◽  
Author(s):  
T. V. Andrushkevich ◽  
G. K. Boreskov ◽  
Yu. D. Pankratiev ◽  
G. Ya. Popova ◽  
O. N. Kozmenko ◽  
...  
Keyword(s):  
Bond Energy ◽  
Catalytic Properties ◽  
Propylene Oxidation ◽  
Surface Reduction ◽  
Cobalt Molybdate ◽  
Oxygen Bond

Adsorption and reactivity of some sulphur-containing compounds on a mixed-oxide « cobalt molybdate » type catalyst

1975 ◽  
Vol 72 ◽  
pp. 1059-1064 ◽  
Author(s):  
David Dollimore ◽  
Andrew Galwey ◽  
Graham Rickety
Keyword(s):  
Mixed Oxide ◽  
Cobalt Molybdate

Propylene Oxidation Mechanisms and Intermediates Using in Situ Soft X-ray Fluorescence Methods on the Pt(111) Surface

2000 ◽  
Vol 122 (1) ◽  
pp. 143-149 ◽  
Author(s):  
Aaron M. Gabelnick ◽  
Adam T. Capitano ◽  
Sean M. Kane ◽  
John L. Gland ◽  
Daniel A. Fischer
Keyword(s):  
Propylene Oxidation ◽  
X Ray ◽  
Fluorescence Methods ◽  
Oxidation Mechanisms

scholarly journals Evidence that a Linear Megaplasmid Encodes Enzymes of Aliphatic Alkene and Epoxide Metabolism and Coenzyme M (2-Mercaptoethanesulfonate) Biosynthesis in XanthobacterStrain Py2

2001 ◽  
Vol 183 (7) ◽  
pp. 2172-2177 ◽  
Author(s):  
Jonathan G. Krum ◽  
Scott A. Ensign
Keyword(s):  
Ring Opening ◽  
Methanogenic Archaea ◽  
Hypothetical Protein ◽  
Epoxide Ring ◽  
Coenzyme M ◽  
Epoxide Ring Opening ◽  
Propylene Oxidation ◽  
Key Enzymes ◽  
Genes Encoding ◽  
Key Enzyme

ABSTRACT The bacterial metabolism of propylene proceeds by epoxidation to epoxypropane followed by a sequence of three reactions resulting in epoxide ring opening and carboxylation to form acetoacetate. Coenzyme M (2-mercaptoethanesulfonic acid) (CoM) plays a central role in epoxide carboxylation by serving as the nucleophile for epoxide ring opening and the carrier of the C3 unit that is ultimately carboxylated to acetoacetate, releasing CoM. In the present work, a 320-kb linear megaplasmid has been identified in the gram-negative bacterium Xanthobacter strain Py2, which contains the genes encoding the key enzymes of propylene oxidation and epoxide carboxylation. Repeated subculturing of Xanthobacter strain Py2 under nonselective conditions, i.e., with glucose or acetate as the carbon source in the absence of propylene, resulted in the loss of the propylene-positive phenotype. The propylene-negative phenotype correlated with the loss of the 320-kb linear megaplasmid, loss of induction and expression of alkene monooxgenase and epoxide carboxylation enzyme activities, and the loss of CoM biosynthetic capability. Sequence analysis of a hypothetical protein (XecG), encoded by a gene located downstream of the genes for the four enzymes of epoxide carboxylation, revealed a high degree of sequence identity with proteins of as-yet unassigned functions in the methanogenic archaeaMethanobacterium thermoautotrophicum andMethanococcus jannaschii and in Bacillus subtilis. The M. jannaschii homolog of XecG, MJ0255, is located next to a gene, MJ0256, that has been shown to encode a key enzyme of CoM biosynthesis (M. Graupner, H. Xu, and R. H. White, J. Bacteriol. 182: 4862–4867, 2000). We propose that the propylene-positive phenotype of Xanthobacter strain Py2 is dependent on the selective maintenance of a linear megaplasmid containing the genes for the key enzymes of alkene oxidation, epoxide carboxylation, and CoM biosynthesis.

Electrochemical performance of an asymmetric supercapacitor based on graphene and cobalt molybdate electrodes

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16319-16327 ◽  
Author(s):  
Ganesh Kumar Veerasubramani ◽  
Karthikeyan Krishnamoorthy ◽  
Sang Jae Kim
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Performance ◽  
Reduced Graphene Oxide ◽  
Negative Electrode ◽  
Positive Electrode ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Reduced Graphene ◽  
Cobalt Molybdate

In this article, we report the fabrication and electrochemical performance of asymmetric supercapacitors (ASCs) based on a reduced graphene oxide (rGO) negative electrode and a cobalt molybdate (CoMoO4) positive electrode.

Propylene Oxidation over Poly(azomethines) Doped with Heteropolyacids

2000 ◽  
Vol 189 (2) ◽  
pp. 297-313 ◽  
Author(s):  
Wincenty Turek ◽  
Edyta-Stochmal-Pomarzańska ◽  
Adam Proń ◽  
Jerzy Haber
Keyword(s):  
Propylene Oxidation

Propylene oxidation on TeO2 a SiO2 catalysts

1975 ◽  
Vol 39 (2) ◽  
pp. 213-224 ◽  
Author(s):  
A CASTELLAN
Keyword(s):  
Propylene Oxidation

ChemInform Abstract: Mechanism for Propylene Oxidation to Acrolein on Bi2Mo3O12: A Quantum Chemical Study.

1986 ◽  
Vol 17 (6) ◽  
Author(s):  
A. B. ANDERSON ◽  
D. W. EWING ◽  
Y. KIM ◽  
R. K. GRASSELLI ◽  
J. D. BURRINGTON ◽  
...  
Keyword(s):  
Quantum Chemical ◽  
Quantum Chemical Study ◽  
Chemical Study ◽  
Propylene Oxidation
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