The Decomposition of Nitrous Oxide on the Surface of Platinum. I. The Retarding Effect of Oxygen

1934 ◽  
Vol 2 (9) ◽  
pp. 585-589 ◽  
Author(s):  
E. W. R. Steacie ◽  
J. W. McCubbin
Keyword(s):  
Nitrous Oxide ◽  
Retarding Effect ◽  
Effect Of Oxygen ◽  
Decomposition Of Nitrous Oxide

The decomposition of nitrous oxide catalysed by palladium-gold alloy wires

1966 ◽  
Vol 294 (1436) ◽  
pp. 1-19 ◽  
Keyword(s):  
Activation Energy ◽  
Nitrous Oxide ◽  
Fermi Level ◽  
Apparent Activation Energy ◽  
Frequency Factor ◽  
Kcal Mole ◽  
Dissociative Chemisorption ◽  
Retarding Effect ◽  
Effect Of Oxygen ◽  
Decomposition Of Nitrous Oxide

The rate of decomposition of nitrous oxide has been examined by pressure measurements, at temperatures between 500 and 900 °C and pressures between 10 -2 and 1 torr. The reaction is first order, but shows retardation by oxygen, but not nitrogen. Over the range of alloys, from Pd to nearly 40 at. % Pd, the velocity at 650 °C falls by a factor of 104, the apparent activation energy falls from 30 to 13 kcal/mole, and the retarding effect of oxygen falls to zero. Over this range of alloys the Fermi level which lies in the d band hardly changes but the concentration of the d band vacancies falls to zero. Over the range of alloys from 40 at. % Pd to Au the velocity at 650 °C remains constant but the apparent activation energy and frequency factor, which show an abrupt increase at 40 at. % Pd, show a continuous fall. The retarding effect of oxygen remains zero. In this range the Fermi level has entered the s band and increases to Au. A steady state treatment of an irreversible dissociative chemisorption of nitrous oxide, together with an oxygen chemisorption equilibrium, yields an equation for the velocity in quantitative agreement with the results found. It is also possible to account for the increase in apparent activation energy with oxygen coverage of the surface. The heat of adsorption of oxygen is derived as 32-2±2 kcal/mole, and the activation energy for chemisorption of nitrous oxide as 12-7 ±0-5 kcal/mole.

Effect of oxygen on decomposition of nitrous oxide over various metal oxide catalysts

2001 ◽  
Vol 42 (15-17) ◽  
pp. 1997-2003 ◽  
Author(s):  
Atsushi Satsuma ◽  
Hajime Maeshima ◽  
Kiyoshi Watanabe ◽  
Tadashi Hattori
Keyword(s):  
Nitrous Oxide ◽  
Metal Oxide ◽  
Oxide Catalysts ◽  
Metal Oxide Catalysts ◽  
Effect Of Oxygen ◽  
Decomposition Of Nitrous Oxide

THE DECOMPOSITION OF NITROUS OXIDE ON THE SURFACE OF PLATINUM: II. THE EFFECT OF FOREIGN GASES

1936 ◽  
Vol 14b (3) ◽  
pp. 84-89 ◽  
Author(s):  
E. W. R. Steacie ◽  
J. W. McCubbin
Keyword(s):  
Nitrous Oxide ◽  
Inert Gases ◽  
Previous Conclusion ◽  
Retarding Effect ◽  
Kinetics Of ◽  
Decomposition Of Nitrous Oxide ◽  
Mechanism Of The Reaction

Further experiments have been made on the kinetics of the decomposition of nitrous oxide on the surface of platinum. Observations on the effect of foreign gases confirm the previous conclusion that inert gases may exert a surprisingly large retarding effect by hindering the diffusion of the reactant to the more remote parts of a porous catalyst.Adsorption measurements have also been made, and their bearing on the mechanism of the reaction is discussed.

Decomposition of nitrous oxide in excess oxygen over Co- and Cu-exchanged MFI zeolites

1996 ◽  
Vol 38 (1-2) ◽  
pp. 27-32 ◽  
Author(s):  
Consuelo Montes de Correa ◽  
Aida Luz Villa ◽  
Mauren Zapata
Keyword(s):  
Nitrous Oxide ◽  
Excess Oxygen ◽  
Mfi Zeolites ◽  
Decomposition Of Nitrous Oxide
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