227934-46-5Relevant articles and documents
Kinetics of thermal decomposition of polyfunctional substituted azido-1,2,4-triazoles
Kruglyakova,Stepanov
, (2012)
Abstract-The structural and kinetics regularities and the mechanism of the limiting step of thermal decomposition of the polyfunctional substituted 1,2,4-triazoles in the melt and in solutions of inert solvents were established. The activation parameters
Effects of Pd particle size and ceria loading on NO reduction with CO
Holles, Joseph H.,Davis, Robert J.,Murray, Thomas M.,Howe, James M.
, p. 193 - 206 (2000)
There has been significant interest in using Pd-only catalysts for automobile three-way exhaust gas conversion. Three-way converters are designed to reduce emissions of CO, NOx, and uncombusted hydrocarbons. These catalysts often contain noble metals, e.g., Pd, Pt, and Rh, with a ceria promoter supported on alumina. In view of this, the kinetics of the NO + CO reaction at 433-573 K were studied over supported palladium with and without ceria promotion. For the ceria promoted samples, the interface between ceria and palladium was changed by varying particle size and the quantity of ceria postdeposited on the Pd particles. The Pd particle size affected activity and apparent reaction orders. For the unpromoted catalyst, the Pd particle size of ~ 4-5 nm average dia had a lower turnover frequency than 1-nm size particles, indicating structure sensitivity of the NO + CO reaction. However, the ceria-promoted samples displayed a maximum in catalytic activity for 2-nm palladium. This maximum in reaction rate indicated a balance between the Pd/ceria interface that promotes NO dissociation and the Pd metal surface that catalyzes product formation. TPD results on adsorbed NO were consistent with this interpretation.
Mechanism of thermal decomposition of d-metals nitrates hydrates
Malecki,Gajerski,Labus,Prochowska-Klisch,Wojciechowski
, p. 17 - 23 (2008/10/08)
A series of six nitrates(V) hydrates of 4d-metals as well as mercury and cadmium thermal decomposition was examined by DTA, TG and EGA techniques. It was found that thermal decomposition of d-metals nitrate(V) hydrates proceeds in three stages: partial dehydration, oxo-nitrates and hydroxide nitrates formation and metal oxides formation. General chemical equations for all decomposition stages were proposed. It was found that dehydration of hydrated salts is accompanied by partial decomposition of nitrate(V) groups.
