Diffusion and Heterogeneous Reaction. VI. Surface Recombination in the Presence of Distributed Atom Sources

Abstract
A theoretical analysis is made of the simultaneous removal of atoms by a first‐order heterogeneous reaction and their generation by a second‐order gas‐phase reaction. Such a model is found applicable to a system in which hydrogen atoms recombine on the walls of a cylindrical vessel in the presence of hydroxyl radicals which may interact in the gas by reaction with hydrogen molecules. The perturbation of the hydrogen‐atom‐concentration profile in the cylinder due to OH as measured by electron spin resonance spectroscopy is employed to calculate the rate constant for the gas‐phase reaction OH+H2→H2O+H.

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