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Title: Preparation of carbon-supported PtRu nanoparticles for direct methanol fuel cell applications - A comparative study
Authors: Deivaraj, T.C. 
Lee, J.Y. 
Keywords: Direct methanol fuel cell
Pt alloy
PtRu nanoparticles
Single-source precursors
Issue Date: 24-Mar-2005
Citation: Deivaraj, T.C., Lee, J.Y. (2005-03-24). Preparation of carbon-supported PtRu nanoparticles for direct methanol fuel cell applications - A comparative study. Journal of Power Sources 142 (1-2) : 43-49. ScholarBank@NUS Repository.
Abstract: Carbon-supported PtRu nanoparticles were prepared by different methods that involve the simultaneous chemical reduction of H2PtCl6 and RuCl3 by NaBH4 at room temperature (PtRu-1), by ethanol under reflux (PtRu-2), and by the thermal decomposition of a single-source molecular precursor [(bipy)3Ru] (PtCl6) (PtRu-3). Transmission electron microscopy (TEM) examinations show that the mean diameter of the PtRu nanoparticles is lowest for PtRu-1 followed by PtRu-2 and PtRu-3. Measurements of electrocatalytic properties, however, reveal a different trend, namely: PtRu-3 > PtRu-1 > PtRu-2. This is attributed to the formation of a more homogenous alloy nanoparticle system from the thermolysis of the single-source molecular precursor. All three catalysts are more active than commercially available E-TEK (20 wt.%) Pt catalyst. PtRu-3 also displays the highest tolerance to carbon monoxide. Heat treatment of PtRu-1 and PtRu-2 only marginally affects their electrocatalytic performance, whereas the co-reduction of H2PtCl6 and RuCl3 under alkaline conditions has more adverse outcomes. © 2004 Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2004.10.010
Appears in Collections:Staff Publications

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