Issue 124, 2015

Platinum functionalized multiwall carbon nanotube composites as recyclable catalyst for highly efficient asymmetric hydrogenation of methyl pyruvate

Abstract

Platinum functionalized carbon materials such as carbon fibres, graphene, MWNTs (multiwalled carbon nanotubes) and activated carbon were used as heterogeneous catalytic systems for asymmetric hydrogenation of α-ketoester i.e. methyl pyruvate using cinchonidine (CD) as a chiral modifier. Interestingly, the MWNTs exhibited excellent enantioselectivity (>99% ee) and conversion (99%) in comparison to other Pt/C systems due to their high surface area. Furthermore, in the case of Pt/MWNTs, Pt nanoparticles are found to be uniformly dispersed and bound to the MWNTs acting like a single atom catalyst. Time-dependent nuclear magnetic resonance (NMR) studies, cyclic voltammetry (CV) and diffuse reflectance spectroscopy (DRS) have been carried out to study substrate–modifier–catalyst interactions. Recyclability of the catalyst was also tested up to ten cycles without losing any significant catalytic activity.

Graphical abstract: Platinum functionalized multiwall carbon nanotube composites as recyclable catalyst for highly efficient asymmetric hydrogenation of methyl pyruvate

Supplementary files

Article information

Article type
Paper
Submitted
19 Oct 2015
Accepted
23 Nov 2015
First published
24 Nov 2015

RSC Adv., 2015,5, 102481-102487

Author version available

Platinum functionalized multiwall carbon nanotube composites as recyclable catalyst for highly efficient asymmetric hydrogenation of methyl pyruvate

P. Sharma and R. K. Sharma, RSC Adv., 2015, 5, 102481 DOI: 10.1039/C5RA21790C

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