Adsorption of H2 at 20 K on (Na,K)ETS-10 is studied by means of IR spectroscopy and molecular mechanics simulations. The occurrence of three steps is evidenced, consisting of: (i) specific interaction of H2 with extraframework cations; (ii) aspecific interaction with the channels walls and (iii) pore filling by a liquid-like phase. Spectroscopic evidence is also given that (Na,K)ETS-10 promotes ortho-para conversion of the adsorbed H2 species.
H2 adsorption and ortho-para conversion on ETS-10
VITILLO, Jenny Grazia;RICCHIARDI, Gabriele;ZECCHINA, Adriano;SPOTO, Giuseppe
2007-01-01
Abstract
Adsorption of H2 at 20 K on (Na,K)ETS-10 is studied by means of IR spectroscopy and molecular mechanics simulations. The occurrence of three steps is evidenced, consisting of: (i) specific interaction of H2 with extraframework cations; (ii) aspecific interaction with the channels walls and (iii) pore filling by a liquid-like phase. Spectroscopic evidence is also given that (Na,K)ETS-10 promotes ortho-para conversion of the adsorbed H2 species.
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