Active and resistive zones of electrochemical oxidation and reduction reactions on zirconia electrolytes

01.04.2011 - 14.12.2019
Research funding project
The reaction paths of oxidation and reduction reactions on solid oxide ion conductors include very active but also resistive (rate limiting) regions and those may be located at three phase boundaries, electrode electrolyte interfaces, electrode surfaces, etc. Exact localization of such kinetically relevant zones and understanding their structure-property relations is essential for a better overall understanding of electrochemical properties of functional oxides. In order to answer questions such as that on the width (decay length) of the reaction zone at the three phase boundary, voltage driven tracer injection or extraction experiments will be performed. 18O will act as the tracer and its distribution after an electrochemical polarization experiment will be analyzed by time-of-flight secondary ion mass spectrometry (ToF-SIMS). H2, O2-, and CH4 oxidation as well as O2 reduction and H2O electrolysis will be investigated on different materials systems such as Pt, Ni, La1-xSrxCo1-yFeyO3-x (LSCF) and La1-xSrxMnO3 (LSM) thin films on yttria stabilizied zirconia (YSZ).

People

Project leader

Project personnel

Institute

Grant funds

  • FWF - Österr. Wissenschaftsfonds (National) Special Research Program (SFB) Austrian Science Fund (FWF)

Research focus

  • Structure-Property Relationsship: 100%

Keywords

GermanEnglish
Brennstoffzellenfuel cells
Ionentransportion transport
Elektrodenkinetikelectrode kinetics

Publications