The steady-state kinetics of the hydrogen-oxygen reaction on a Pt(111) surface at low and moderate pressures

Abstract

The steady-state kinetics of the hydrogen-oxygen reaction on a Pt(111) surface is studied at low (10 −5−10 −4 Pa) and moderate (5–100 Pa) pressures of the stoichiometric mixture of the reagents. The moderate-pressure kinetics is analyzed on the basis of data obtained in the transient studies at low pressures. It is found that the reaction rate, extrapolated from low to moderate pressures, exceeds the measured rate by about an order of ten.