RT journal article
T1 Single-Step Process To Prepare CeO2 Nanotubes with Improved Catalytic Activity
A1 González Rovira, Leandro
A1 Sánchez Amaya, José María
A1 López Haro, Miguel
A1 del Río, Eloy
A1 Hungría Hernández, Ana Belén
A1 Midgley, Paul
A1 Calvino Gámez, José Juan
A1 Bernal Márquez, Serafín
A1 Botana Pedemonte, Francisco Javier
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
AB CeO2 nanotubes have been grown electrochemically using a porous alumina membrane as a template. The resulting material has been characterized by means of scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy, high-angle annular dark-field scanning transmission electron microscopy tomography, high-resolution electron microscopy (HREM), and electron energy loss spectroscopy. Accordingto SEM, the outer diameter of the nanotubes corresponds to the pore size (200 nm) of the alumina membrane, and their length ranges between 30 and 40 μm. HREM images have revealed that the width of the nanotube walls is about 6 nm. The catalytic activity of these novel materials for the CO oxidation reaction is compared to that of a polycrystalline powder CeO2 sample prepared by a conventional route. The activity of the CeO2 nanotubes is shown to be in the order of 400 times higher per gram of oxide at 200 °C (77.2 × 10-2 cm3 CO2 (STP)/(g·s) for the nanotube-shaped CeO2 and 0.16 × 10-2 cm3 CO2 (STP)/(g·s) for the powder CeO2).
PB American Chemical Society
SN 1530-6984
YR 2009
FD 2009
LK http://hdl.handle.net/10498/30336
UL http://hdl.handle.net/10498/30336
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026