An antimony(V) substituted Keggin heteropolyacid, H 4PSbMo 11O 40

Why is its catalytic activity in oxidation reactions so different from that of H 4PVMo 11O 40?

Hila Goldberg, Devesh Kumar, G. Narahari Sastry, Gregory Leitus, Ronny Neumann

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

An antimony(V) containing α-Keggin type acidic polyoxometalate, H 4PSbMo 11O 40, was prepared by reacting NaMoO 4, H 3PO 4 and Sb 2O 3 in the presence of aqua regia to appraise its reactivity compared to the well known vanadate analog, H 4PVMo 11O 40. Characterization was by X-ray diffraction, MALDI-TOF MS, IR, UV-vis and 31P NMR spectroscopy. Catalytic redox reactions, such as oxidative dehydrogenation using O 2 and N 2O as terminal oxidants were studied and showed very different reactivity of H 4PSbMo 11O 40 versus H 4PVMo 11O 40. It was found by DFT calculations that in contrast to analogous H 4PVMo 11O 40 where vanadium centered catalysis is observed, in H 4PSbMo 11O 40 catalysis is molybdenum and not antimony centered.

Original languageEnglish
Pages (from-to)152-157
Number of pages6
JournalJournal of Molecular Catalysis A: Chemical
Volume356
DOIs
Publication statusPublished - Apr 2012

Fingerprint

Antimony
antimony
Catalysis
catalysis
catalytic activity
Catalyst activity
reactivity
Oxidation
Vanadium
oxidation
Vanadates
vanadates
Molybdenum
Redox reactions
Dehydrogenation
dehydrogenation
Oxidants
Discrete Fourier transforms
vanadium
Nuclear magnetic resonance spectroscopy

Keywords

  • Antimony
  • DFT
  • Molybdenum
  • Oxidation
  • Polyoxometalate

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Process Chemistry and Technology

Cite this

An antimony(V) substituted Keggin heteropolyacid, H 4PSbMo 11O 40 : Why is its catalytic activity in oxidation reactions so different from that of H 4PVMo 11O 40? / Goldberg, Hila; Kumar, Devesh; Sastry, G. Narahari; Leitus, Gregory; Neumann, Ronny.

In: Journal of Molecular Catalysis A: Chemical, Vol. 356, 04.2012, p. 152-157.

Research output: Contribution to journalArticle

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abstract = "An antimony(V) containing α-Keggin type acidic polyoxometalate, H 4PSbMo 11O 40, was prepared by reacting NaMoO 4, H 3PO 4 and Sb 2O 3 in the presence of aqua regia to appraise its reactivity compared to the well known vanadate analog, H 4PVMo 11O 40. Characterization was by X-ray diffraction, MALDI-TOF MS, IR, UV-vis and 31P NMR spectroscopy. Catalytic redox reactions, such as oxidative dehydrogenation using O 2 and N 2O as terminal oxidants were studied and showed very different reactivity of H 4PSbMo 11O 40 versus H 4PVMo 11O 40. It was found by DFT calculations that in contrast to analogous H 4PVMo 11O 40 where vanadium centered catalysis is observed, in H 4PSbMo 11O 40 catalysis is molybdenum and not antimony centered.",
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author = "Hila Goldberg and Devesh Kumar and Sastry, {G. Narahari} and Gregory Leitus and Ronny Neumann",
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AB - An antimony(V) containing α-Keggin type acidic polyoxometalate, H 4PSbMo 11O 40, was prepared by reacting NaMoO 4, H 3PO 4 and Sb 2O 3 in the presence of aqua regia to appraise its reactivity compared to the well known vanadate analog, H 4PVMo 11O 40. Characterization was by X-ray diffraction, MALDI-TOF MS, IR, UV-vis and 31P NMR spectroscopy. Catalytic redox reactions, such as oxidative dehydrogenation using O 2 and N 2O as terminal oxidants were studied and showed very different reactivity of H 4PSbMo 11O 40 versus H 4PVMo 11O 40. It was found by DFT calculations that in contrast to analogous H 4PVMo 11O 40 where vanadium centered catalysis is observed, in H 4PSbMo 11O 40 catalysis is molybdenum and not antimony centered.

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