Journal of Solid State Electrochemistry

, Volume 16, Issue 2, pp 703–714

Electrochemical testing of composite electrodes of (La1−xSrx)sMnO3 and doped ceria in NO-containing atmosphere

  • Rebecka M. L. Werchmeister
  • Kent Kammer Hansen
  • Mogens Mogensen
Original Paper

DOI: 10.1007/s10008-011-1421-9

Cite this article as:
Werchmeister, R.M.L., Hansen, K.K. & Mogensen, M. J Solid State Electrochem (2012) 16: 703. doi:10.1007/s10008-011-1421-9

Abstract

The possibility of using electrochemical cells for removal of NOx from an exhaust gas with excess O2 has been examined. (La1−xSrx)sMnO3 (LSM) and ceria doped with Pr or Gd were selected as electrode materials and investigated in three-electrode cells. The electrodes were characterised electrochemically with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), and the gas composition monitored while the electrodes were polarised. The electrodes of (La0.5Sr0.5)0.99MnO3 (LSM50) and Ce0.8Pr0.2O2−δ exhibit higher current densities in 0.1% NO in Ar than in air at 300 to 400 °C during CV. This indicates some apparent selectivity towards NO compared to O2. The electrodes can remove NO, when polarised to at least −0.6 V vs. Pt/Air at 600 °C, and EIS measurements under polarisation indicate that the kinetics of the electrodes change, when the electrode potential gets below −0.6 V vs. Pt/Air.

Keywords

Composites Electrical properties CeO2 Perovskites Electrochemical deNOx 

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Rebecka M. L. Werchmeister
    • 1
  • Kent Kammer Hansen
    • 1
  • Mogens Mogensen
    • 1
  1. 1.Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable EnergyTechnical University of DenmarkRoskildeDenmark

Personalised recommendations