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Preparation and characterization of nano-sized Pt-Ru/C catalysts and their superior catalytic activities for methanol and ethanol oxidation
Date
2011-01-01
Author
Sen, Selda
Sen, Fatih
Gökağaç Arslan, Gülsün
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Carbon-supported PtRu nanoparticles (Ru/Pt: 0.25) were prepared by three different methods; simultaneous reduction of PtCl(4) and RuCl(3) (catalyst I) and changing the reduction order of PtCl4 and RuCl3 (catalysts II and III) to enhance the performance of the anodic catalysts for methanol and ethanol oxidation. Structure, microstructure and surface characterizations of all the catalysts were carried out by X-ray diffraction (XRD), transmission electron microscopy (TEM) coupled with energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS). The results of the XRD analysis showed that all catalysts had a face-centered cubic (fcc) structure with different and smaller lattice parameters than that of pure platinum, showing that the Ru incorporates into the Pt fcc structure by different ratios in all the catalysts. The typical particle sizes of all catalysts were in the range of 2-3 nm. The most active and stable catalyst for methanol and ethanol oxidation is catalyst III, in which a large amount (more than 90%) of PtRu alloy formation was observed. It has been found that this catalyst is about 8.0 and 33.4 times more active at similar to 0.60 V towards the methanol and ethanol oxidation reactions, respectively, compared to the commercial Pt catalyst.
Subject Keywords
Fuel-cell applications
,
Formic-acid
,
Nanoparticle electrocatalyst
,
Ruthenium nanoparticles
,
Microemulsion synthesis
,
Platinum nanoparticles
,
Mass-spectrometry
,
Tert-octanethiol
,
Electrooxidation
,
Carbon
URI
https://hdl.handle.net/11511/39495
Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
DOI
https://doi.org/10.1039/c1cp20064j
Collections
Department of Chemistry, Article
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S. Sen, F. Sen, and G. Gökağaç Arslan, “Preparation and characterization of nano-sized Pt-Ru/C catalysts and their superior catalytic activities for methanol and ethanol oxidation,”
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
, pp. 6784–6792, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39495.