Isotope Effect for Heat Generation upon Pressurizing Nano-Pd/Silica Systems with Hydrogen Isotope Gases

Abstract

The isotope effect for heat generation upon pressurization with hydrogen isotope gases was clearly observed in a reproducible manner for nano-Pd/silica systems. For Pd/zeolite, the isotope effect decreased with increasing cycle of pressurization and almost disappeared at several cycles, whereas the effect was observed up to 15 cycles or more for Pd/FSM. Pd particles with sizes less than 2 nm are suggested to be essential for the isotope effect to be clearly observable.