51V NMR of homogeneous multicomponent vanadium oxide solutions

Kangtaek Lee, Gary Pozarnsky, Odile Zarembowitch, Alon McCormick

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


There is growing interest in forming vanadium-containing mixed transition metal oxides, particularly for the preparation of oxidation catalysts. It is desirable in many cases to prepare the solid from homogeneous (stable or metastable) metal oxide solutions and gels in order to maintain the molecular-scale mixing that homogeneous solutions can provide. While this is always possible at extreme pH values, it is also desirable to use moderate pH so that the coating solution should be benign to common substrates. We provide an overview of the insight that 51V NMR can provide into typical aqueous and alkoxide solution routes suggested by the literature for preparing multicomponent vanadium-containing solutions at moderate pH. Details of the preparation protocol can determine whether the solutions remain homogeneous; we examine the starting pH for aqueous solutions and the alcohol used for alkoxide solutions. Solution 51V NMR shows that the vanadium speciation differs markedly between stable and unstable solutions.

Original languageEnglish (US)
Pages (from-to)215-223
Number of pages9
JournalChemical Engineering Journal and the Biochemical Engineering Journal
Issue number2
StatePublished - Jan 1 1996


  • Solution routes
  • Transition metal oxides
  • V NMR

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