4.7 Article

Enhanced electrocatalytic activity and stability of monodisperse Pt nanocomposites for direct methanol fuel cells

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 513, Issue -, Pages 767-773

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.11.085

Keywords

f-CB; High electrical conductivity; Methanol electrooxidation; Nanocatalyst; Superior performance

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Direct methanol fuel cells (DMFCs) are one of the most important fuel cells operating at low temperature using methanol as fuel and they need very efficient catalysts to activate the methanol. Generally, the most efficient fuel cell catalysts are platinum-based nanoparticles that can be used by different supporting materials such as different as prepared and functionalized carbon derivatives. For this purpose, herein, the carbon black has been mainly functionalized with an acidification process in order to increase the electrical conductivity and heterogeneous electron transfer rate of supporting materials. After functionalization of carbon black (f-CB), platinum salt (PtCl4) was stabilized with propylamine (PA) in the presence of ethylene glycol (EG) and f-CB by microwave synthesis method. XPS, XRD, TEM and Raman Spectroscopy techniques were used to determine the morphology of the prepared catalyst. The results showed that the prepared nanocatalyst has face-centered cubic (fcc) structure and uniformly distribution on supporting material. Besides, chronoamperometry (CA) and cyclic voltammetry (CV) techniques were used to determine the electrochemical activity of functionalized carbon black supported Pt NPs (Pt/f-CB) towards methanol. From the results obtained from the CV and CA, it was found that the activity of the Pt/f-CB NPs (50 mA/cm(2)) was almost 4-5 times higher than that of the Pt/CB NPs and commercial available Pt/C catalyst (ETEK). (C) 2017 Elsevier Inc. All rights reserved.

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