News Column

Study Data from Brookhaven National Laboratory Update Knowledge of Alcohols

February 18, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Alcohols have been published. According to news reporting out of Upton, New York, by NewsRx editors, research stated, "In this article, we address two key challenges in the development of electrocatalysts for direct methanol fuel cells by rationally tailoring the morphology and chemical composition of Pd-based nanowires (NWs) for enhanced performance. First, we have examined the morphology and composition-dependent performance of Pt1-xPdx NWs toward the methanol oxidation reaction (MOR)."

Our news journalists obtained a quote from the research from Brookhaven National Laboratory, "Elemental Pt NWs were found to possess a significant morphology-dependent enhancement of nearly 3-fold in terms of peak MOR-specific activity over that of commercial Pt NP/C. In addition, tailoring the chemical composition in Pt(1-x)Pdx NWs can lead to measurable increases in MOR kinetics, which can be attributed to improved oxidation of formic acid and, potentially, increased selectivity for a direct, CO-free pathway. Second, we have explored the stability of ORR performance in the presence of measurable concentrations of methanol as a function of chemical composition in Pt(1-x)Pdx NWs and Pt-free Pd9Au NWs. In the context of the Pt1-xPdx NWs, a distinctive volcano-type dependence has been noted with respect to chemical composition, and on the basis of the MOR activities and methanol tolerant ORR behavior, Pt7Pd3 NWs have been highlighted as an optimal catalyst architecture. We have also analyzed the methanol tolerance in Pd9Au NWs, which represents a highly active, durable Pt-free alternative to traditional Pt-based nanostructured catalysts."

According to the news editors, the research concluded: "Herein, we have demonstrated that Pd9Au NWs (0.42 mA/cm(2)) with no effective Pt content can outperform Pt-based nanostructures, such as Pt NWs (0.32 rnA/cm(2)) and nanoparticulate Pt NP/C (0.24 mA/cm(2)) in the presence of 4 mM methanol/0.1 M HClO4."

For more information on this research see: Tailoring Chemical Composition To Achieve Enhanced Methanol Oxidation Reaction and Methanol-Tolerant Oxygen Reduction Reaction Performance in Palladium-Based Nanowire Systems. ACS Catalysis, 2013;3(9):2031-2040. 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)

Our news journalists report that additional information may be obtained by contacting C. Koenigsmann, Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Department, Upton, NY 11973, United States (see also Alcohols).

Keywords for this news article include: Upton, New York, Alcohols, Methanol, Palladium, Chalcogens, United States, Transition Elements, North and Central America

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Source: Life Science Weekly


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