Concerning the isotope effect in the decomposition of ammonia on tungsten surfaces

Abstract

It has been stated in the literature that NH3 decomposition on W being 1.6 times faster than ND3 precludes N2 desorption being the rate-determining step as has been suggested from kinetic measurements. Having found ND3 is a better electron donor than NH3 we present a simple molecular orbital model of bonding to the surface which suggests the isotope effect can be explained as a β-secondary isotope effect which is compatible with N2 desorption being rate limiting.

Document Type

Article

DOI

https://doi.org/10.1021/j100651a005

Publication Date

1-1-1972

Journal Title

The Journal of Physical Chemistry

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