By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Chalcogens. According to news reporting originating from Warsaw, Poland, by NewsRx correspondents, research stated, "Application of a catalyst preparation method known as 'water-in-oil' microemulsion allowed to obtain a series of palladium/polypyrrole (Pd/PPY) electrocatalysts with various Pd contents (2-20 wt%) and Pd particle size within a narrow and similar range of 6-8 nm. The textural features of the samples (surface area, porosity) as well as the palladium phase (metal particle size, shape) were characterized by a number of techniques."
Our news editors obtained a quote from the research from the University of Warsaw, "Electrocatalytic activity of the prepared materials towards oxygen reduction reaction (ORR) was studied in 0.5 M H2SO4 using rotating ring disc electrode voltammetry (RRDE) and cyclic voltammetry techniques. All prepared Pd/PPY samples exhibited electrocatalytic activity towards ORR. At a constant palladium loading on the electrode, the polymer to Pd weight ratio was found to play a decisive role in the electrocatalytic performance of the samples. Their catalytic performance in terms of the increased reduction current and positively shifted half-wave potential (RRDE measurements) was improved when Pd content in polymer was grown from 2 to 12 wt% Pd. At the optimum Pd content, 10-12 wt%, the analysis of the RRDE data confirmed that molecular oxygen underwent mainly a desired four-electron reduction. By further increasing the Pd content and thus decreasing the PPY to Pd ratio, the selectivity to water continuously decreased while the fraction of undesired H2O2 product significantly increased."
According to the news editors, the research concluded: "Therefore, a role of PPY to Pd weight ratio in the electrocatalytic performance of the investigated catalysts is discussed here."
For more information on this research see: Palladium Content Effect on the Electrocatalytic Activity of Palladium-Polypyrrole Nanocomposite for Cathodic Reduction of Oxygen. Electrocatalysis, 2014;5(1):23-40. Electrocatalysis can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer - www.springer.com; Electrocatalysis - www.springerlink.com/content/1868-2529/)
The news editors report that additional information may be obtained by contacting M. Goral-Kurbiel, University of Warsaw, Dept. of Chem, PL-02093 Warsaw, Poland. Additional authors for this research include A. Drelinkiewicz, R. Kosydar, B. Dembinska, P.J. Kulesza and J. Gurgul (see also Chalcogens).
Keywords for this news article include: Warsaw, Poland, Europe, Palladium, Chalcogens, Transition Elements
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