Selective Heterogeneous Catalytic Hydrogenation of Ketone (C═O) to Alcohol (OH) by Magnetite Nanoparticles Following Langmuir–Hinshelwood Kinetic Approach

Abstract

Magnetite nanoparticles were successfully synthesized and effectively employed as heterogeneous catalyst for hydrogenation of ketone moiety to alcohol moiety by NaBH4 under the microwave radiation process. The improvement was achieved in percent recovery of isopropyl alcohol by varying and optimizing reaction time, power of microwave radiations and amount of catalyst. The catalytic study revealed that acetone would be converted into isopropyl alcohol (IPA) with 99.5% yield in short period of reaction time, using 10 μg of magnetite NPs (Fe3O4). It was observed that the catalytic hydrogenation reaction, followed second-order of reaction and the Langmuir-Hinshelwood kinetic mechanism, which elucidated that both reactants get adsorb onto the surface of silica coated magnetite nanocatalyst to react. Consequently, the rate-determining step was the surface reaction of acetone and sodium borohydride. The current study revealed an environment friendly conversion of acetone to IPA on the basis of its fast, efficient, and highly economical method of utilization of microwave irradiation process and easy catalyst recovery.

Environmental implications and applications of engineered nanoscale magnetite and its hybrid nanocomposites: A review of recent literature

“…A novel core-shell structural Fe3O4@MgAl-LDH@Au nanocatalyst exhibits excellent activity for the oxidation of 1-phenylethanol [167]. MNPs are effectively employed as heterogeneous catalyst for hydrogenation of ketone moiety to alcohol moiety by NaBH4 under the microwave radiation process [168]. An efficient and benign protocol has been reported for the synthesis of medicinally important pyrazole derivatives, 4-methoxyaniline, and Ullmann-type condensation reaction using MNPs (20-30 nm)-supported CuO NPs and the catalysts are recycled six times without loss in catalytic activity [169].…”

Titania supported synergistic palladium single atoms and nanoparticles for room temperature ketone and aldehydes hydrogenation

“…S elective reduction of ketone/aldehydes to alcohols constitutes a great importance in green chemistry and chemical engineering 1,2 . The conventional noncatalytic method uses stoichiometric reducing agent (e.g., NaBH 4 ) and derives a large amount of inorganic wastes.…”

Heterogeneous Ketone Hydrodeoxygenation for the Production of Fuels and Feedstocks from Biomass

“…We decided to optimize our process for Ni/SiO 2 .Al 2 O 3 owing to the economic advantages of using a non‐precious metal catalyst. Faster rates have been reported for this reaction by using magnetite nanoparticles for the conversion of acetone to isopropanol in 60 s under microwave irradiation, although the catalyst suffers from rapid loss of activity …”