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Studies from University College London in the Area of Chalcogens Described (Novel Composite Cermet for Low-Metal-Content Oxygen Separation Membranes)

August 12, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Researchers detail new data in Chalcogens. According to news reporting originating from London, United Kingdom, by NewsRx correspondents, research stated, "A dense composite of silver and Ce0.8Sm0.2O2-delta (Ag-CSO) was manufactured from ceramic nanopartides coated by electroless deposition of silver. At 700 degrees C, a 1-mm-thick membrane of the composite delivered an excellent oxygen permeation rate from air with a value of 0.04 mu mol cm(-2) s(-1), using argon as the sweep gas and 0.17 mu mol cm(-2) s(-1) using hydrogen."

Our news editors obtained a quote from the research from University College London, "The low sintering temperature of the CSO nanoparticles allows the use of Ag rather than Pt or Pd and reduces the amount of metal needed for electronic conductivity to just 5.6 vol 96, which is lower than any value reported in the literature. Oxygen diffusivity measurements confirmed that the oxygen migration remained high in the composite, with an increase in surface exchange coefficient of three orders of magnitude over Gd-doped ceria."

According to the news editors, the research concluded: "The ease of membrane fabrication, combined with encouraging oxygen permeation rates, demonstrate the promise of the material for high-purity oxygen separation below 700 degrees C."

For more information on this research see: Novel Composite Cermet for Low-Metal-Content Oxygen Separation Membranes. Chemistry of Materials, 2014;26(13):3887-3895. Chemistry of Materials can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Chemistry of Materials -

The news editors report that additional information may be obtained by contacting E. Ruiz-Trejo, UCL, Dept. of Chem, London WC1H 0AJ, United Kingdom. Additional authors for this research include P. Boldrin, A. Lubin, F. Tariq, S. Fearn, R. Chater, S.N. Cook, A. Atkinson, R.I. Gruar, C.J. Tighe, J. Darr and N.P. Brandon (see also Chalcogens).

Keywords for this news article include: London, Europe, Chalcogens, United Kingdom

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Source: Life Science Weekly

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