Hydrogen adsorption in nanoporous nickel(II) phosphates

Paul M. Forster, Juergen Eckert, Jong San Chang, Sang Eon Park, Gérard Férey, Anthony K. Cheetham

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Hydrogen sorption in the nanoporous nickel phosphates VSB-1 and VSB-5 has been studied with a combination of BET, temperature programmed desorption (TPD), and inelastic neutron scattering (INS) measurements. H2 BET isotherms for VSB-1 are similar to those seen in nanoporous zeolites, while VSB-5 adsorbs substantially more hydrogen due to a steep initial uptake at low partial pressures. TPD data show that hydrogen interacts strongly with VSB-5, with desorption peaks at 109 and 149 K in a nitrogen flow, whereas the absence of similar peaks for VSB-1 suggests a weaker interaction. INS spectra of the rotational tunnel transition of the adsorbed H2 also reveal a strong interaction with the VSB-5 host. These data strongly suggest the existence of coordinatively unsaturated Ni2+ sites accessible to H2 molecules in the pores of VSB-5.

Original languageEnglish
Pages (from-to)1309-1312
Number of pages4
JournalJournal of the American Chemical Society
Issue number5
StatePublished - Feb 5 2003


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