By a News Reporter-Staff News Editor at Science Letter -- Current study results on Kinetics and Catalysis have been published. According to news reporting originating from Penang, Malaysia, by NewsRx correspondents, research stated, "Bimetallic Pd/Au nanoparticle catalysts were prepared with chitosan as a stabilizer. The preparation procedure included mixing or stepwise adding palladium and gold ions in various molar ratios followed by simultaneous or stepwise reduction using either methanol or sodium borohydride (nb) as reducing agents."
Our news editors obtained a quote from the research from the University of Science Malaysia, "TEM and UV-Vis characterization showed that the particle size of bimetallic Chi-Pd/Au prepared by simultaneous reduction was smaller than that of the samples prepared by stepwise reduction methods. The particle size varied in the 1 to 24 nm range at all Pd/Au molar ratios of bimetallic compositions. Sodium borohydride was the most effective reducing agent for the preparation of bimetallic Chi-Pd(core)A(ushell) by the stepwise reduction. The catalytic activities of Chi-Pd/Au prepared by either simultaneous or stepwise reductions were generally higher than those of the respective monometallic systems whereas the most active catalysts were prepared by the simultaneous reduction. Shielding the palladium metal colloid with gold sol led to the decrease in catalytic activity. The turnover frequencies (TOFs) for Chi-Pd/Au-me in catalytic hydrogenation of 1-octene were as high as 20.855 and 89.336 for monometallic and bimetallic catalysts respectively. TOFs for Chi-Pd/Au-nb were in the region between 2.978 and 87.429."
According to the news editors, the research concluded: "The core-shell and alloy formation of the bimetallic Chi-Pd/Au were inferred from the particle size measurements and evaluation of catalytic activity."
For more information on this research see: The properties of Pd/Au bimetallic colloidal catalysts stabilized by chitosan and prepared by simultaneous and stepwise chemical reduction of the precursor ions. Kinetics and Catalysis, 2013;54(5):586-596. Kinetics and Catalysis can be contacted at: Maik Nauka, Interperiodica, Springer, 233 Spring St, New York, NY 10013-1578, USA. (Pleiades Publishing - www.maik.ru)
The news editors report that additional information may be obtained by contacting M. Adlim, University of Sains Malaysia, Sch Chem Sci, Minden 11800, Penang, Malaysia (see also Kinetics and Catalysis).
Keywords for this news article include: Asia, Penang, Malaysia, Chemicals, Chemistry, Sodium Borohydride, Kinetics and Catalysis
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