Ordered Mesoporous Carbon‐supported Morphologically‐controlled Nano‐Gold: Role of Support as well as the Shape and Size of Gold Nanoparticles on the Selective Oxidation of Glycerol

Abstract

Dedicated to Prof. Dr. K.K. Balasubramanian on the occasion of his 80 th birthday Glyceric acid is one of the important intermediates of glycerol oxidation. However, it is extremely difficult to achieve high glyceric acid selectively as the reaction follows a complex pathway with the formation of a variety of undesired products. In this context, periodic mesoporous carbon-supported gold catalysts show promise for selective formation of the targeted product. Therefore, in this investigation, an effort has made to study the effect of particle size and shape of a series of carbon supported with varied sized/shaped gold catalysts on the liquid-phase oxidation of glycerol. Further, the role played by the surface of gold-nanoparticles has prompted us to investigate in detail the isotropic (nanocube/nanosphere) and anisotropic (nanoslabs/nanorods) gold supported onto both activated/amorphous carbon (Au/AC) and ordered mesoporous carbon (Au/CMK-3) towards glycerol oxidation. It was observed that the CMK-3 supported gold nanocube exhibited the highest yield towards glyceric acid with an excellent stability in terms of recyclability/reusability.

Amperometric Determination of Hydrazine Using Au Nanoparticle Incorporated CMK-3 Modified Glassy Carbon Electrode

“…The obtained morphological features are good in agreement with the existing literature. 76 Electrochemical characterization of AuNP-CMK-3/GCE.-Further, electrochemical techniques like electrochemical impedance spectroscopy (EIS), as well as cyclic voltammetry, were employed to characterize the electrodes. The catalytic activity of the electrode was investigated by monitoring the charge transfer properties at the electrode-electrolyte interface with the help of EIS and the responses are shown in Fig.…”