ON THE CATALYTIC C-H ACTIVATION OF SOME SILICON DIOXIDE OVERLAYERS ON THIN METAL-FILM SYSTEMS - AN OBSERVATION ON THE ISOKINETIC EFFECT

Kinetic data on the exchange reaction betwee hexane and deuterium have recently been reported by Maier and coworkers [1]. The reaction was catalysed by a series of platinum or rhodium systems, some of which had the property that the upper surface was shielded by a silica overlayer. The data are reinterpreted to indicate an isokinetic temperature of 580 K. This observation indicates that all the catalysts behave in a similar manner, which means that the exchange reaction does not require a free metal surface.