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Study Results from National Research Council in the Area of Chalcogens Reported (Yttrium Oxide/Gadolinium Oxide-Modified Platinum Nanoparticles as...

September 9, 2014



Study Results from National Research Council in the Area of Chalcogens Reported (Yttrium Oxide/Gadolinium Oxide-Modified Platinum Nanoparticles as Cathodes for the Oxygen Reduction Reaction)

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators discuss new findings in Chalcogens. According to news reporting originating in Padua, Italy, by NewsRx journalists, research stated, "Rare-earth-element (Y, Gd) modified Pt nanoparticles (NPs) supported on a carbon substrate (Vulcan XC-72) are synthesized via a water-in-oil chemical route. In both cases, X-ray diffraction (XRD) measurements show the non-formation of an alloyed material."

The news reporters obtained a quote from the research from National Research Council, "Photoemission spectroscopy (XPS) results reveal that Y and Gd are oxidized. Additionally, no evidence of an electronic modification of Pt can be brought to light. Transmission electron microscopy (TEM) studies indicate that Pt-Y2O3 and Pt-Gd2O3 particles are well dispersed on the substrate-and that their average particle sizes are smaller than the Pt-NP sizes. The catalytic activity of the Pt-Y2O3/C and Pt-Gd2O3/C catalysts towards the oxygen reduction reaction (ORR) is studied in a 0.5 M H2SO4 electrolyte. The surface and mass specific activities of the Pt-Y2O3/C catalyst towards the ORR at 0.9 V (vs. the reversible hydrogen electrode, RHE) are (54.3 +/- 1.2) mu A cm(Pt)(-2) and MA = (23.1 +/- 0.5) mA mg(Pt)(-1), respectively. These values are 1.3-, and 1.6-fold higher than the values obtained with a Pt/C catalyst. Although the as-prepared Pt-Gd2O3/C catalyst has a lower catalytic activity for the ORR compared to Pt/C, the heat-treated sample shows a surface specific activity of about (53.0 +/- 0.7) mu A cm(Pt)(-2), and a mass specific activity (MA) of about (18.2 +/- 0.5) mA mg(Pt)(-1) at 0.9 V (vs. RHE)."

According to the news reporters, the research concluded: "The enhancement of the ORR kinetics on the Pt-Y2O3/C and heat-treated Pt-Gd2O3/C catalysts could be associated with the formation of platinum NPs presenting modified surface properties."

For more information on this research see: Yttrium Oxide/Gadolinium Oxide-Modified Platinum Nanoparticles as Cathodes for the Oxygen Reduction Reaction. Chemphyschem, 2014;15(10):2136-2144. Chemphyschem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Chemphyschem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1439-7641)

Our news correspondents report that additional information may be obtained by contacting Y. Luo, CNR, Unita Ric INFM, I-35131 Padua, Italy. Additional authors for this research include A. Habrioux, L. Calvillo, G. Granozzi and N. Alonso-Vante (see also Chalcogens).

Keywords for this news article include: Padua, Italy, Europe, Chalcogens, Emerging Technologies, Nanoparticle, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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