Реферат: The reactions of NO + H2 and NO + NH3 on Pt(100) were studied in the 10-6 mbar range under constant flow conditions at 300-750 K with mass spectrometry, work function measurements, and video LEED. Multiple steady state and kinetic oscillations were found with each of the two reaction mixtures For the NO + H2 system, the primary reaction products were N2, H2O, and NH3, whereas for the NO + NH3 reactions, N2 and H2O were formed. Both systems exhibited a number of common features in their steady-state and oscillatory kinetics. The similarities include spike-like features in the N2 production rate which occur at 400-420 K, large variations in the work function signals as a function of temperature, and the occurrence of phase transitions between the 1×1 and hexagonal phases of Pt(100). Kinetic oscillations, as determined from variations in the N2, H2O, and work function signals, were found between 420 and 445 K. The similarities in the two systems are attributed to the relative insensitivity of NO to the nature of the reducing agent, either H2 or NH3, and to the presence of adsorbed NHx (x = 1-3) species whose concentration controls the availability of adsorbed H atoms for the removal of at. O. 1992:620927 117:220927

Библиографическая ссылка: Lombardo S.J. , Slinko M. , Fink T. , Loeher T. , Madden H.H. , Esch F. , Imbihl R. , Ertl G.
The NO + H2 and NO + NH3 reactions on Pt(100): steady state and oscillatory kinetics
Surface Science. 1992. V.269-270. NA. P.481-487. CAPlusCA

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Chemical Abstracts:	1992:620927
Chemical Abstracts (print):	117:220927