This title appears in the Scientific Report : 2014 

Volume-doped cobalt titanates for ethanol sensing: An impedance and X-ray absorption spectroscopy study
Belle, Clemens J. (Corresponding author)
Wesch, Günter E. / Neumeier, Stefan / Lozano-Rodríguez, M. Janeth / Scheinost, Andreas C. / Simon, Ulrich
Nukleare Entsorgung und Reaktorsicherheit; IEK-6
Sensors and actuators / B, 192 (2014) S. 60 - 69
Amsterdam [u.a.] Elsevier Science 2014
Journal Article
Safety Research for Nuclear Waste Disposal
Please use the identifier: in citations.
The dynamic C2H5OH sensitivity of ilmenite-type cobalt titanates volume-doped by 2 at% Li, Na, K, Sb, La, Sm, Gd, Ho and Pb was systematically studied with respect to exhaust monitoring. Therefore, the p-type semiconducting CoTiO3 materials were characterized as resistive gas sensors via high-throughput impedance spectroscopy toward 5–200 ppm C2H5OH at 300–500 °C. The best performing materials were tested further by time-resolved and long-term measurements whereby the CoTiO3 volume-doped with K exhibited an outstanding overall performance. X-ray absorption spectroscopy on this particular material gave evidence that the local structure around Co and Ti remains unaffected by the doping despite of a slight increase in static disorder. Hence, the effect of K doping does not originate from alteration in the metal-to-oxygen interaction as expected from previous findings.