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Researchers at Brookhaven National Laboratory Target Nanowires (Probing Ultrathin One-Dimensional Pd-Ni Nanostructures As Oxygen Reduction Reaction...

September 9, 2014



Researchers at Brookhaven National Laboratory Target Nanowires (Probing Ultrathin One-Dimensional Pd-Ni Nanostructures As Oxygen Reduction Reaction Catalysts)

By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Nanowires. According to news reporting originating from Upton, New York, by NewsRx correspondents, research stated, "An ambient, surfactant-based synthetic means was used to prepare ultrathin binary (d similar to 2 nm) Pd-Ni nanowires, which were subsequently purified using a novel butylamine-based surfactant-exchange process coupled with an electrochemical CO adsorption and stripping treatment to expose active surface sites. We were able to systematically vary the chemical composition of as-prepared Pd-Ni nanowires from pure elemental Pd to Pd0.50Ni0.50 (atomic ratio), as verified using EDS analysis."

Our news editors obtained a quote from the research from Brookhaven National Laboratory, "The overall morphology of samples possessing >60 atom % Pd consisted of individual, discrete one-dimensional nanowires. The electrocatalytic performances of elemental Pd, Pd0.90Ni0.10, Pd0.83Ni0.17, and Pd0.75Ni0.25 nanowires in particular were examined. Our results highlight a 'volcano'-type relationship between chemical composition and corresponding ORR activities with Pd0.90Ni0.10, yielding the highest activity (i.e., 1.96 mA/cm(2) at 0.8 V) among all nanowires tested. Moreover, the Pd0.90Ni0.10 sample exhibited outstanding methanol tolerance ability. In essence, there was only a relatively minimal 15% loss in the specific activity in the presence of 4 mM methanol, which was significantly better than analogous data on Pt nanoparticles and Pt nanowires. In addition, we also studied ultrathin, core-shell Pt similar to Pd0.90Ni0.10 nanowires, which exhibited a specific activity of 0.62 mA/cm(2) and a corresponding mass activity of 1.44 A/mg(Pt), at 0.9 V. Moreover, our as-prepared core shell electrocatalysts maintained excellent electrochemical durability."

According to the news editors, the research concluded: "We postulate that one-dimensional Pd-Ni nanostructures represent a particularly promising platform for designing ORR catalysts with high performance."

For more information on this research see: Probing Ultrathin One-Dimensional Pd-Ni Nanostructures As Oxygen Reduction Reaction Catalysts. ACS Catalysis, 2014;4(8):2544-2555. ACS Catalysis can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Catalysis - www.pubs.acs.org/journal/accacs)

The news editors report that additional information may be obtained by contacting H.Q. Liu, Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Department, Upton, NY 11973, United States. Additional authors for this research include C. Koenigsmann, R.R. Adzic and S.S. Wong (see also Nanowires).

Keywords for this news article include: Upton, New York, United States, North and Central America, Chemicals, Chemistry, Electrochemical, Emerging Technologies, Nanostructural, Nanostructures, Nanotechnology, Nanowire, Nanowires

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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