Fabrication and characterization of well-dispersed and highly stable PtRu nanoparticles on carbon mesoporous material for applications in direct methanol fuel cell
Resource
Chemistry of Materials 20 (4): 1622-1628
Journal
Chemistry of Materials
Journal Volume
20
Journal Issue
4
Pages
1622-1628
Date Issued
2008
Author(s)
Liu, Shou-Heng
Yu, Wen-Yuch
Chen, Ching-Hsiang
Lo, An-Ya
Hwang, Bing-Joe
Chien, Shu-Hua
Liu, Shang-Bin
Abstract
Well-dispersed, highly stable PtRu nanoparticles of ca. 2-3 nm on carbon mesoporous materials (PtRu-CMMs) were synthesized directly using SBA-15 mesoporous silica as the template, furfuryl alcohol and trimethylbenzene as the primary carbon source, and platinum and ruthenium acetylacetonates as the cofeeding metal and carbon precursors. Results obtained from X-ray diffraction and X-ray photoelectron spectroscopy show that the Pt metal in the PtRu-CMMs was present in the form of a face-centered cubic (fee) crystalline structure and the alloyed PtRu nanoparticles were composed mainly of Ru oxides, Ru(O), and Pt(O) metals. Further studies by X-ray absorption spectroscopy confirmed that a highly alloyed state of the PtRu nanoparticles is responsible for the superior electrocatalytic performance observed for the PtRu-CMMs, as compared to typical commercial electrocatalysts. The Pt50Ru50-CMM sample was found to possess the best electrocatalytic performance and long-term durability and should appeal to direct methanol fuel cell applications as anodic electrodecatalyst. © 2008 American Chemical Society.
Type
journal article
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