Electrochemical Reduction of Oxygen and Nitric Oxide on Mn-Based Perovskites with Different A-Site Cations

Table 1

The unit cell parameters for the four perovskites. It is seen that the unit cell becomes more and more distorted from the ideal cubic perovskite structure, when the size of the A-site cation is lowered.

Compound	LaMnO3+δ	PrMnO3+δ	SmMnO3+δ	GdMnO3+δ
A (Å)	5.5197	7.635 (6)	7.4873 (18)	7.4344 (15)
B (Å)	5.5197	5.604 (3)	5.8342 (18)	5.8680 (19)
C (Å)	13.354	5.451 (4)	5.3606 (15)	5.3166 (12)
Volume (Å^3)	127.6	233.3	234.2	232.0