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Updated: Dec 30, 2025

HKUST-1 as a Heterogeneous Catalyst for the Synthesis of Vanillin
Published on: July 23, 2016
Mixed Co-Mn Oxide-Catalysed Selective Aerobic Oxidation of Vanillyl Alcohol to Vanillin in Base-Free Conditions
Ajay Jha1, Kashinath R Patil2, Chandrashekhar V Rode1
1Chemical Engineering and Process Development, National Chemical Laboratory, Pune 411008 (India), Fax: (+91) 20-2590-2621.
Abstract:
Manganese-doped cobalt mixed oxide (MnCo-MO) catalyst was prepared by a solvothermal method. The as-prepared catalyst was characterised by X-ray photoelectron spectroscopy, H2 temperature-programmed reduction, O2 temperature-programmed oxidation and XRD. This catalyst gave 62 % conversion with 83 % selectivity to vanillin in 2 hours for the liquid-phase air oxidation of vanillyl alcohol without using base. Three different types of metal oxides were observed in the prepared catalyst, which could be identified as Co3 O4 , Mn3 O4 and CoMn2 O4 . Among these, the tetragonal phase of CoMn2 O4 was found to be more active and selective for vanillyl alcohol oxidation than Co3 O4 and Mn3 O4 . High-resolution TEM characterisation revealed the morphology of MnCo-MO nanorods with a particle size of 10 nm. Successful recycling of the catalyst was also established in this oxidation reaction.
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