Structure of redox intercalated (NH4)0.5V 2o5·mH2O xerogel using the pair distribution function technique

Pantelis N. Trikalitis, Valeri Petkov, Mercouri G. Kanatzidis

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31 Citations (Scopus)

Abstract

The structure of (NH4)0.5V2O 5·mH2O (m ≈ 0.9), a representative member of the family of intercalated solids with reduced V2O5 xerogel framework, has been successfully determined using the atomic pair distribution function (PDF) technique. We show that at the atomic scale (NH 4)0.5V2O5·mH2O is isostructural with pristine V2O5·nH2O that features a double layer of V2O5 separated by water molecules and ammonium ions in a monoclinic unit cell (space group C2/m) with parameters a = 11.845(1) Å, b = 3.677(1) Å, c = 9.058(1) Å, and β = 88.635°. Vanadium oxide network in (NH4) 0.5V2O5·mH2O is slightly expanded when compared to that in pristine V2O 5·nH2O, reflecting the elongation of V-O bonds in the former material. The results presented here prove that the redox intercalation of V2O5·nH2O xerogel is indeed a topotactic reaction.

Original languageEnglish
Pages (from-to)3337-3342
Number of pages6
JournalChemistry of Materials
Volume15
Issue number17
DOIs
Publication statusPublished - Aug 1 2003

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ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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