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New Findings from Lund University Update Understanding of Nanoparticles [A high pressure X-ray photoelectron spectroscopy study of oxidation and...

September 12, 2014



New Findings from Lund University Update Understanding of Nanoparticles [A high pressure X-ray photoelectron spectroscopy study of oxidation and reduction of Rh(100) and Rh nanoparticles]

By a News Reporter-Staff News Editor at Science Letter -- Fresh data on Nanoparticles are presented in a new report. According to news originating from Lund, Sweden, by NewsRx correspondents, research stated, "We have studied the oxidation and reduction of Rh(100) and SiO2 supported Rh particles using high pressure X-ray photoelectron spectroscopy. We show that the formation and reduction of Rh bulk oxide can be followed in situ in O-2 and CO pressures in the range of 0.1 Torr."

Our news journalists obtained a quote from the research from Lund University, "In general, the oxidation/reduction processes are similar on Rh(100) and the nanoparticles, but there are significant differences in temperature dependence. Already at a sample temperature of 140 degrees C, the particles show clear signs of a thin bulk oxide, while an ultra-thin so-called surface oxide covers the single crystal at the same temperature. Both of these oxide films, however, hinder further oxidation, and a thick oxide is only found at a temperature of at least 300 degrees C, for both samples."

According to the news editors, the research concluded: "The reduction, in contrast, starts at a higher temperature on the particles as compared to the single crystal, but once started the particles are completely reduced at lower temperatures."

For more information on this research see: A high pressure X-ray photoelectron spectroscopy study of oxidation and reduction of Rh(100) and Rh nanoparticles. Surface Science, 2014;628():153-158. Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Surface Science - www.elsevier.com/wps/product/cws_home/505676)

The news correspondents report that additional information may be obtained from S. Blomberg, Lund University, SE-22100 Lund, Sweden. Additional authors for this research include R. Westerstrom, N.M. Martin, E. Lundgren, J.N. Andersen, M.E. Messing and J. Gustafson (see also Nanoparticles).

Keywords for this news article include: Lund, Sweden, Europe, Emerging Technologies, Nanoparticle, Nanoparticles, Nanotechnology

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


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Source: Science Letter


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