Surface oxygen exchange kinetics of mixed conducting oxides: Dilatometric vs electrical conductivity relaxation study

Design of Mixed Ionic-Electronic Materials for Permselective Membranes and Solid Oxide Fuel Cells Based on Their Oxygen and Hydrogen Mobility

“…Relaxation techniques such as the electrical conductivity relaxation (ECR) [ 168 , 169 , 170 , 171 , 172 , 173 , 174 , 175 , 176 ], mass relaxation (MR, also referred to as weight relaxation or thermogravimetric relaxation) [ 69 , 111 , 112 , 113 , 176 , 177 , 178 ] and unit cell volume relaxation (UCVR) [ 69 , 162 , 179 ] techniques are based on the changing some characteristics of a sample with time after rapid change of the gas-phase composition such as the partial pressure of oxygen, carbon dioxide, hydrogen or water vapors. After such a rapid change, the system solid-state sample–gas phase becomes non-steady-state, and oxygen or/and hydrogen desorbs from the sample or adsorbs on the sample to reach a new steady state.…”

Consistent interpretation of isotope and chemical oxygen exchange relaxation kinetics in SrFe0.85Mo0.15O3−δ ferrite

“…47,48 However, works considering more than one kinetic method are rare (for example ref. [49][50][51][52][53][54][55][56][57][58], and often lead to significantly different results. 36,40,[50][51][52] Therefore, one of the goals of this work was to compare the results of two relaxation methods: isotope and chemical ones.…”

“…[49][50][51][52][53][54][55][56][57][58], and often lead to significantly different results. 36,40,[50][51][52] Therefore, one of the goals of this work was to compare the results of two relaxation methods: isotope and chemical ones.…”