Publication
Physical Review Letters
Paper

Thermally assisted tunneling: CH4 dissociation on Pt(111)

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Abstract

The mechanism for the dissociation of CH4 at metal surfaces has been and is still controversial. In large part, this is because many of the experimental data suggest a direct tunneling mechanism, which is not obviously compatible with an observed strong dependence on the surface temperature. We propose here that a new phenomenon, thermally assisted tunneling, caused by a coupling of the tunnel barrier to the lattice, resolves this controversy. Explicit calculations using a simplified model for this process agree qualitatively with a wide range of experimental data for CH4 dissociation on Pt(111). © 1991 The American Physical Society.

Date

29 Jul 1991

Publication

Physical Review Letters

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