Malaysian Journal of Analytical Sciences Vol 23 No 1 (2019): 71 - 79

DOI: 10.17576/mjas-2019-2301-09






 (PdAu Dwilogam Mangkin untuk Elektropengoksidaan Gliserol dengan Menggunakan Analisis Kitaran Voltametri)


Norilhamiah Yahya1 and Siti Kartom Kamaruddin2,3*


1Malaysian Institute of Chemical and Bioengineering Technology,

Universiti Kuala Lumpur, 78000 Alor Gajah, Melaka, Malaysia.

2Fuel Cell Institute

3Department of Chemical and Process Engineering

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.


*Corresponding author:



Received: 13 April 2017; Accepted: 17 April 2018




This study was conducted to examine the performance of Palladium (Pd) based catalyst for glycerol oxidation in alkaline media by using half-cell in a cyclic voltammetry study. The sonication assisted reduction method by sodium citrate and sodium borohydride was employed to prepare a bimetallic PdAu catalyst. The crystallinity data of bimetallic Pd2Au1 and Pd4Au1 catalysts were characterised by powder X-ray powder diffraction (XRD). Meanwhile, morphology, rough composition and distribution of metallic elements from both catalysts were investigated by Field Emission Scanning Electron Microscope (FESEM) and Energy Dispersive X-ray (EDX), respectively. The performances of the synthesised catalysts were analysed for the electrooxidation of glycerol in alkaline media by cyclic voltammetry analysis and chronoamperometry analysis. It was found that Pd2Au1 showed higher performance in terms of peak current density (55.28 mA cm-2), onset potential (-0.4152 V) and more stability towards glycerol oxidation compared to Pd4Au1. The cyclic voltammetry study yielded an electrochemically active surface area for Pd2Au1 catalyst at 14.12 m2g-1, compared to Pd4Au1 catalyst at only 12.7 m2g-1.


Keywords:  PdAu, nanocatalyst, alkaline medium, glycerol oxidation, cyclic voltammetry



Kajian ini adalah untuk mengkaji prestasi mangkin berasaskan Palladium (Pd) untuk pengoksidaan gliserol dalam media alkali dengan menggunakan sel separuh dalam kajian voltammetri berkitar. Kaedah sonikasi dibantu kaedah penurunan oleh natrium sitrat dan natrium borohidrat telah digunakan untuk menyediakan mangkin dwilogam PdAu. Data penghabluran mangkin dwilogam Pd2Au1 dan Pd4Au1 telah dicirikan oleh pembelauan sinar-X (XRD). Sementara itu, morfologi, komposisi kasar dan taburan unsur logam daripada mangkin telah disiasat menggunakan mikroskopi elektron imbasan (FESEM) dan spektrometer serakan tenaga sinar-X (EDX). Prestasi mangkin yang disintesis dianalisa untuk melihat tindakbalas elektropengoksidaan gliserol dalam media beralkali oleh ujian kitaran voltammetri dan ujian kronoamperometri. Telah didapati bahawa Pd2Au1 menunjukkan prestasi yang lebih tinggi dari segi ketumpatan arus puncak (55.28 mA cm-2), permulaan keupayaan potensi (-0.4152V) dan lebih kestabilan terhadap pengoksidaan gliserol dibandingkan dengan Pd4Au1. Kajian kitaran voltammetri menghasilkan kawasan permukaan elektrokimia aktif untuk mangkin Pd2Au1 sebanyak 14.12 m2g-1, di bandingkan dengan mangkin Pd4Au1 hanya sebanyak 12.7 m2g-1.


Kata kunci:  PdAu, nanomangkin, media alkali, pengoksidaan gliserol, kitaran voltammetri



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