Synthesis and Characterisation of P-Doped Sr2MnFeO6-δ Systems

Perovskite systems have attracted considerable interest for fuel cell/electrolyser applications. Here we show that phosphate can be incorporated into the mixed Mn/Fe system Sr 2 MnFeO 6-δ . In all cases, the conductivity was shown to increase for low doping levels (≤10 % phosphate incorporation) with a subsequent decrease for higher doping levels, attributed to the presence of Sr 3 (PO 4 ) 2 impurity as the solubility limit is exceeded. The work further illustrates that phosphate can be doped into perovskite systems, highlighting this doping approach as an alternative strategy to modify the structure and properties.