Ahmad, M. S. and Cheng, C. K. and Ong, Huei Ruey and Hamidah, Abdullah and Hong, Chi Shein and Chua, Gek Kee and Mishra, Puranjan and Khan, Maksudur R. (2019) Electro-oxidation of waste glycerol to tartronic acid over Pt/CNT nanocatalyst: study of effect of reaction time on product distribution. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. pp. 1-18. ISSN 1556-7036 (Print); 1556-7230 (Online). (In Press / Online First) (In Press / Online First)
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Abstract
In this work, glycerol valorization into tartronic acid – one of the most valuable derivatives of glycerol – was reported over platinum supported on multi-walled carbon nanotubes (Pt/CNT) electrocatalyst. The nanocatalyst was synthesized using a chemical reduction method with hydrazine as a reducing agent. The physical analyses of catalyst were performed by BET, XRD, FESEM, EDX, and TEM. The XRD spectroscopy indicated a face-centered cubic crystalline structure with an average crystallite size of 4.2 nm. The field emission scanning electron microscopy analysis revealed that the particles were uniformly distributed over multi-walled carbon nanotubes, while EDX showed the elemental composition of Pt (17.52%) and C (82.48%). Electrochemical activity and stability of the catalyst were measured using cyclic voltammetry and chronoamperometry techniques. Electrochemical surface area (ECSA, 226.52 m2/g) and mass activity (MA, 5.74 mA/mg) were calculated in 0.5 M H2SO4 and 0.5 M glycerol/0.5 M KOH solution, respectively. The catalytic activity of Pt/CNT nanoparticles was analyzed from glycerol oxidation reaction (GOR), while the products distribution and selectivity were measured using high-performance liquid chromatography (HPLC). It was found that the tartronic acid was produced as a major product with a selectivity of 95.3% while small quantities (<1%) of mesoxalic acid, dihydroxyacetone, and glyceric acid were also produced. The higher activity and selectivity of Pt/CNT can be attributed to high electrochemical surface area and uniform distribution over support.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Electrochemical surface area, glycerol oxidation reaction, HPLC, Pt/CNT, tartronic acid |
| Subjects: | T Technology > TP Chemical technology |
| Faculty/Division: | Faculty of Chemical & Natural Resources Engineering Faculty of Engineering Technology Institute of Postgraduate Studies |
| Depositing User: | Noorul Farina Arifin |
| Date Deposited: | 28 Jan 2020 03:25 |
| Last Modified: | 29 Jan 2020 01:28 |
| URI: | http://umpir.ump.edu.my/id/eprint/27577 |
| Download Statistic: | View Download Statistics |
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