Gas-Surface Reaction Dynamics and the Decomposition and Reaction of Organo-Phosphonate Esters

摘要

Inelastic electron tunneling spectroscopy has been used to characterize the adsorption and decomposition of a number of organo-phosphonate esters on aluminum oxide surfaces as a function of surface coverage and surface temperature. Technological advances have been made in the measurement of inelastic electron tunneling spectra including a rapid spectral measurement technique and a simple technique for background removal. A microreactor which allows rates of heterogeneously catalyzed surface reactions to be measured at pressures from below .0000001 Torr to one atmosphere has been constructed. This microreactor has been used to measure the rate of decomposition of ammonia, the inhibition by hydrogen in the rate of ammonia decomposition, and the rate of exchange of deuterium into NH3 on a platinum surface. A microscopic model has been developed that describes these reactions for pressures between .0000001 and 1 Torr and temperatures between 450 and 1250 K.