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Efficient, Solvent Free and Selective Oxidation of Styrene to Benzaldehyde Over Niobium Modified Phosphomolybdic Acid Catalyst


Niobium substituted phosphomolybdic acid with various Nb/P mole ratio of catalysts were successfully synthesised by hydrothermal method. These materials were characterized by X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, temperature programmed desorption of ammonia and BET surface area measurements to be investigate the structural and acidity properties of catalyst. The activities of the materials were evaluated for the solvent free oxidation of styrene to benzaldehyde and the best catalytic activity was achieved for the catalyst with Nb/P mole ratio is 2.0. This catalytic system provides one of the most straight forward syntheses of carbonyl compound from styrene. The synthesized material can be recovered and reused for same reaction.

Graphic Abstract

Reaction Oxidation of styrene to benzaldehyde over Nb containing phosphomolybdic acid catalyst

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Authors thank to CSIR-Indian Institute of Chemical Technology, Hyderabad, India

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Correspondence to Balaga Viswanadham.

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Viswanadham, B., Chary, K.V.R. Efficient, Solvent Free and Selective Oxidation of Styrene to Benzaldehyde Over Niobium Modified Phosphomolybdic Acid Catalyst. Catal Lett (2021).

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  • Oxidation
  • Styrene
  • Benzaldehyde
  • Nb-PMA
  • TPD
  • BET surface area