Electronic properties

PD Dr. Evgenii Kondratenko

The impedance spectroscopy is highly sensitive to inherent changes in solid materials and hence offers potential for in-situ characterization not only of electrical properties but also of phase changes and solid-state reactions. Moreover, the electrical properties play an essential role in various catalytic reactions. Materials possessing both high electronic and ionic conductivity are considered necessary for reactions, where high bulk motilities of the charges are required. For example, for the oxidative coupling of methane (OCM), it was established that materials with high p-type and O2 -conductivity are good candidates for the OCM reaction [1, 2]. Additionally, the impedance spectroscopy has potential for determining O2-permeation properties of solid materials without having time-consuming standard permeation tests.

References

  1. G. Gayko, D. Wolf, E.V. Kondratenko and M. Baerns, J. Catal., 178 (1998) 441-449.
  2. E.V. Kondratenko, D. Wolf and M. Baerns, Catal. Let., 58 (1999) 217-223.