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Glycerol waste valorization to mesoxalic acid over a bimetallic Pt-Pd/CNT catalyst in alkaline medium

Ahmad, M. S. (2019) Glycerol waste valorization to mesoxalic acid over a bimetallic Pt-Pd/CNT catalyst in alkaline medium. Journal of Nanoscience and Nanotechnology. pp. 1-29. ISSN 1533-4880 (Print); 1533-4899 (Online) (Submitted)

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Abstract

Glycerol electro-oxidation offers a green route to produce the high value added chemicals. Here in, we report the glycerol electro-oxidation over a series of multi walled carbon nano tubes supported monometallic (Pt/CNT and Pd/CNT) and bimetallic (Pt-Pd/CNT) catalysts in alkaline medium. The cyclic voltammetry, linear sweep voltammetry and chronoamperometry measurements were used to evaluate the activity and stability of the catalysts. The Pt-Pd/CNT electrocatalyst exhibited the highest activity in terms of higher current density (129.25 A/m2) and electrochemical surface area (382 m2/g). The glycerol electro-oxidation products formed at a potential of 0.013 V were analyzed systematically by high performance liquid chromatography. Overall, six compounds were found including mesoxalic acid, 1,3-dihydroxyacetone, glyceraldehyde, glyceric acid, tartronic acid and oxalic acid. A highest mesoxalic acid selectivity of 86.42 % was obtained for Pt-Pd/CNT catalyst while a maximum tartronic acid selectivity of 50.17 % and 46.02 % was achieved for Pd/CNT and Pt/CNT respectively. It was found that the introduction of Pd into Pt/CNT lattice facilitated the formation of C3 products in terms of maximum selectivity achieved (86.42 %) while the monometallic catalysts (Pd/CNT and Pt/CNT) showed a poor performance in comparison to their counterpart.

Item Type: Article
Uncontrolled Keywords: Pt-Pd/CNT; glycerol electro-oxidation reaction; mesoxalic acid; HPLC
Subjects: T Technology > TP Chemical technology
Faculty/Division: Institute of Postgraduate Studies
Faculty of Chemical and Process Engineering Technology
Depositing User: Noorul Farina Arifin
Date Deposited: 28 Jan 2020 04:28
Last Modified: 28 Jan 2020 04:28
URI: http://umpir.ump.edu.my/id/eprint/27579
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