نتایج جستجو برای: catalytic oxidation

تعداد نتایج: 187843  

Journal: :Chemical communications 2015
Peng Tan Hoi-Ki Kwong Tai-Chu Lau

An iron(iii) complex bearing a cross-bridged cyclam ligand (4,11-dimethyl-1,4,8,11-tetraazabicyclo[6.6.2]hexadecane) is an efficient catalyst for the oxidation of both water and alcohols using sodium periodate as the oxidant. In catalytic water oxidation a maximum turnover number (TON) of 1030 is achieved, while in catalytic alcohol oxidation >95% conversions and yields can be obtained.

Journal: :Chemical communications 2010
Hiroyuki Miyamura Kanako Maehata Shu Kobayashi

An in situ coupled oxidation cycle that allows catalytic oxidation of a substrate with catalytic amounts of o-chloranil and novel reusable polymer-immobilized platinum nanocluster catalysts using molecular oxygen as the terminal oxidant was developed.

Journal: :The Journal of General Physiology 2003
Charles J. Lyon

Arsenate exerts a catalytic effect on the oxidation of pyrogallol by atmospheric oxygen, on the catalytic oxidation of pyrogallol by metallic iron, and on the presumably enzymatic production of CO(2) by Elodea canadensis.

Ali Allahresani Heidar Raissi Mohammad Nasseri,

Nano-graphene oxide was synthesized by the oxidation of graphite powders. The structural nature of the nano-graphene oxide was characterized by a variety of techniques including XRD, TEM, FT-IR and UV/Vis. The functional groups on its basal planes and edges of nano-grahene oxide play important role in catalytic activity. The catalytic activity of nano-graphene oxide was investigated on Crossed-...

Journal: :iranian journal of catalysis 2014
golshan mazloom seyed mehdi alavi

effects of water on the catalytic performances of movtenbo catalyst in the oxidation of propane to acrylic acid have been investigated at different reaction temperatures and different steam contents. obtained results show that both catalytic performances and catalyst structure are very sensitive to the presence of water vapor in the reaction feed. presence of water induces some structural modif...

2014
Keshav Soni S Chandra Shekar

Palladium supported Al2O3 and SiO2 catalysts have been synthesized and evaluated for carbon monoxide oxidation in the presence of ozone. The factors affecting the CO oxidation such as Pd loading (wt%), contact time, reaction temperature and O3/CO molar ratio have been studied. The extent of ozone decomposition on Pd catalysts is proportional to the CO oxidation activity. High reaction temperatu...

2003
MARCEL DEKKER Shi-gang Zhang Heng Jiang Hong Gong Zhao-lin Sun

Synthesis of adipic acid by catalytic oxidation of cyclohexanone with 30% hydrogen peroxide in the presence of sodium tungstate catalyst can be well performed under reflux temperature. The adipic acid isolated yield reaches to 82.1%, and the purity of the product is also very high. The catalytic oxidation reaction takes place without any organic solvent and phase-transfer agent. The effects ove...

Journal: :Applied and environmental microbiology 1981
W N Shirey T A Hall E Hanel E B Sansone

Formaldehyde used for the disinfection of a laminar-flow biological safety cabinet was oxidatively degraded by using a catalyst. This technique reduced the formaldehyde concentration in the cabinet from about 5,000 to about 45 mg/m3 in 8 h. This technique should prove useful in other applications.

Journal: :Angewandte Chemie 2013
Manuel Jäger Marcel Hartmann Johannes G de Vries Adriaan J Minnaard

Discrimination among equals: A catalytic method for the selective oxidation of unprotected glycosides, both monosaccharides and disaccharides, has been developed. The resulting ketosaccharides are isolated in moderate to excellent yields. This approach provides a basis for protecting-group-free synthetic transformations of carbohydrates.

Journal: :Chemical communications 2014
Zuofeng Chen Javier J Concepcion Na Song Thomas J Meyer

Rates of electrocatalytic water oxidation to oxygen by Ru(II) polypyridyl complexes are enhanced by added NaCl. Observations based on the single-site catalyst [Ru(II)(Mebimpy)(bpy)(OH2)](2+) (Mebimpy is 2,6-bis(1-methylbenzimidazol-2-yl)pyridine; bpy is 2,2'-bipyridine) at pH 7.0 in a phosphate buffer suggest a mechanism involving initial oxidation of the catalyst to Ru(V)(O)(3+) followed by Cl...

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