Mg-doped La0·3Sr0·7Mn0·8Mg0·2O3−δ cathode as a catalyst for NOx decomposition via H–SOFCs.

Proton conducting solid oxide fuel cells (H–SOFCs) with BaZr 0·1 Ce 0·7 Y 0·2 O 3-δ as electrolyte were fabricated to couple the removal of nitrogen oxides in power generation technology. Specially, a deliberately designed cathode with the composition of La 0·3 Sr 0·7 Mn 0·8 Mg 0·2 O 3−δ was prepared to realize this dual function. The results indicated that the incorporation of Mg ions in La 0·3 Sr 0·7 MnO 3−δ can improve its ability to adsorb NO and the cathode activity. At 800 °C, when using the NO as oxidant, single cell with La 0·3 Sr 0·7 Mn 0·8 Mg 0·2 O 3−δ cathode was able to obtain peak power density of 48 mW cm−2 and achieve the conversion of NO to N 2 more than 48%. These findings suggested that power generation coupling deNO via H–SOFC is possible and La 0·3 Sr 0·7 Mn 0·8 Mg 0·2 O 3−δ was a promising cathode for this application. [ABSTRACT FROM AUTHOR]