Table 1. Observed and calculated mass changes for two La0.70Sr0.25Zn0.05OI0.70 pellets and one La2O3 pellet after the modified Tubandt electrolysis performed under two different conditions.
Condition | Q/mC | Sample | Δmobs/mg | Δmcal/mg (Δmobs/Δmcal) | ||||
I− | O2−, e−, or H+ | La3+ | Sr2+ | Zn2+ | ||||
400°C, 15 V, 5 days | 149.2 | A (La2O3) | +0.167 | +0.184 (91%) | 0 | 0 | 0 | 0 |
B (La0.70Sr0.25 Zn0.05OI0.70) |
−0.0004 | 0 | 0 | −0.145 (7%) | −0.338 (3%) | −1.35 (1%) | ||
C (La0.70Sr0.25 Zn0.05OI0.70) |
−0.174 | −0.184 (95%) | 0 | +0.084 (−208%) |
+0.080 (−218%) |
+0.06 (−277%) |
||
400°C, 15 V, 7 days | 201.4 | A (La2O3) | +0.220 | +0.248 (89%) | 0 | 0 | 0 | 0 |
B (La0.70Sr0.25 Zn0.05OI0.70) |
+0.048 | 0 | 0 | −0.196 (−24%) | −0.456 (−10%) | −1.82 (−3%) | ||
C (La0.70Sr0.25 Zn0.05OI0.70) |
−0.239 | −0.248 (96%) | 0 | +0.113 (−211%) |
+0.108 (−221%) |
+0.09 (−281%) |