News Column

Investigators from Technical University of Denmark Report New Data on Nanoparticles

June 24, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Nanoparticles have been published. According to news reporting from Roskilde, Denmark, by NewsRx journalists, research stated, "Growth of carbon nanotubes (CNTs) catalyzed by zirconia nanoparticles was observed in the Ni-yttria doped zirconia (YSZ) composite cathode of a solid oxide electrolysis cell (SOEC) at approximately 875 degrees C during co-electrolysis of CO2 and H2O to produce CO and H-2. CNT was observed to grow under large cathodic polarizations specifically at the first 1 to 2 m Ni-YSZ active cathode layer next to the YSZ electrolyte."

The news correspondents obtained a quote from the research from the Technical University of Denmark, "High resolution transmission electron microscopy (HRTEM) shows that the CNTs are multi-walled with diameters of approximately 20nm and the catalyst particles have diameters in the range of 5 to 25nm. The results of HRTEM and energy dispersive X-ray spectroscopy (EDS) analysis confirm that the catalyst particles attached to the CNT are cubic zirconia. Most of the zirconia particles are located at one end of the CNTs, but particles embedded in the walls or inside the CNTs are also observed. Apart from the CNTs, graphitic layers covering zirconia nanoparticles are also widely observed. This work describes nano-zirconia acting as a catalyst for the growth of CNT during electrochemical conversion of CO2 and H2O in a Ni-YSZ cermet under strong cathodic polarization. An electrocatalytic mechanism is proposed for the CNT growth in SOECs."

According to the news reporters, the research concluded: "These findings provide further understanding not only on the mechanism of the catalytic growth of CNTs, but also on the local electrochemical properties of a highly polarized Ni-YSZ cathode at the micro and nano level."

For more information on this research see: Carbon Nanotube Growth on Nanozirconia under Strong Cathodic Polarization in Steam and Carbon Dioxide. Chemcatchem, 2014;6(5):1220-1224. Chemcatchem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell -; Chemcatchem -

Our news journalists report that additional information may be obtained by contacting Y.K. Tao, Technical University of Denmark, Dept. of Energy Convers & Storage, DK-4000 Roskilde, Denmark. Additional authors for this research include S.D. Ebbesen, W. Zhang and M.B. Mogensen (see also Nanoparticles).

Keywords for this news article include: Europe, Denmark, Roskilde, Chemistry, Carbon Dioxide, Nanotechnology, Electrochemical, Emerging Technologies

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Source: Life Science Weekly

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