Isotherm for $Ni-O_2$ Adsorption System

The activation energy of dissociative adsorption of oxygen on polycrystalline nickel surface is calculated from adsorption isotherms obtained using X-ray photoelectron spectroscopy. Negative value of this activation energy (-5.9 kJ/mol) indicates that the adsorption takes place through an undissocia...

Full description

Saved in:
Bibliographic Details
Published inBulletin of the Korean Chemical Society Vol. 11; no. 3; pp. 231 - 235
Main Authors Kyoung-Hee Ham, Woon-Sun Ahn
Format Journal Article
LanguageKorean
Published 1990
Online AccessGet full text

Cover

More Information
Summary:The activation energy of dissociative adsorption of oxygen on polycrystalline nickel surface is calculated from adsorption isotherms obtained using X-ray photoelectron spectroscopy. Negative value of this activation energy (-5.9 kJ/mol) indicates that the adsorption takes place through an undissociated precursor state. An adsorption energy for this precursor state is calculated assuming the precursor state as a moleculary physisorbed state ($E_{ad}$ = -7.9 kJ/mol). Finally, an adsorption isotherm equation is derived as a function of the gas exposure, which agrees with the experimental isotherms reasonably good.
Bibliography:KISTI1.1003/JNL.JAKO199013464454729
ISSN:0253-2964
1229-5949