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The Scientific World Journal - Volume 2014 2014, Article ID 547604, 8 pages -

Research Article

Fuel Cell Institute, Universiti Kebangsaan Malaysia UKM, 43600 Bangi, Selangor, Malaysia

Department of Chemical and Process Engineering, Universiti Kebangsaan Malaysia UKM, 43600 Bangi, Selangor, Malaysia

Received 8 January 2014; Revised 21 March 2014; Accepted 21 March 2014; Published 27 April 2014

Academic Editor: Tebello Nyokong

Copyright © 2014 S. Basri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

PtRu catalyst is a promising anodic catalyst for direct methanol fuel cells DMFCs but the slow reaction kinetics reduce the performance of DMFCs. Therefore, this study attempts to improve the performance of PtRu catalysts by adding nickel Ni and iron Fe. Multiwalled carbon nanotubes MWCNTs are used to increase the active area of the catalyst and to improve the catalyst performance. Electrochemical analysis techniques, such as energy dispersive X-ray spectrometry EDX, X-ray diffraction XRD, field emission scanning electron microscopy FESEM, and X-ray photoelectron spectroscopy XPS, are used to characterize the kinetic parameters of the hybrid catalyst. Cyclic voltammetry CV is used to investigate the effects of adding Fe and Ni to the catalyst on the reaction kinetics. Additionally, chronoamperometry CA tests were conducted to study the long-term performance of the catalyst for catalyzing the methanol oxidation reaction MOR. The binding energies of the reactants and products are compared to determine the kinetics and potential surface energy for methanol oxidation. The FESEM analysis results indicate that well-dispersed nanoscale 2–5 nm PtRu particles are formed on the MWCNTs. Finally, PtRuFeNi-MWCNT improves the reaction kinetics of anode catalysts for DMFCs and obtains a mass current of 31 A g

catalyst.





Autor: S. Basri, S. K. Kamarudin, W. R. W. Daud, Z. Yaakob, and A. A. H. Kadhum

Fuente: https://www.hindawi.com/



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