Properties of A-site nonstoichiometry (Pr0.4) Sr0.6Co0.2Fe0.7Nb0.1O3− (0.9 ≤ x ≤ 1.1) as symmetrical electrode material for solid oxide fuel cells

Mechanisms of methane decomposition and carbon species oxidation on the Pr0.42Sr0.6Co0.2Fe0.7Nb0.1O3−σ electrode with high catalytic activity

“…Such methane decomposition behaviour on PSCFN may attribute to the generation of nano CoFealloy after it is reduced in H 2 , as reported in our previous work25 andYang et al24 . Such methane decomposition behaviour on PSCFN may attribute to the generation of nano CoFealloy after it is reduced in H 2 , as reported in our previous work25 andYang et al24 .…”

“…3(a) and 3(b) show the MS-signal of effluent gas in CH 4 decomposition process. 3 [25], PSCFN material was applied as the symmetrical electrodes for SOFCs, in which PSCFN was used in both anode and cathode. Simultaneously, the amount of produced H 2 increased first and then decreased after the operation was performed for 7 min.…”

A cobalt-free electrode material La0.5Sr0.5Fe0.8Cu0.2O3−δ for symmetrical solid oxide fuel cells

“…Although these materials demonstrate considerable activity for hydrogen or methane oxidation, their structure stability in reducing atmospheres is still a significant concern [16]. Alternatively, several partially reducible cathodes were reported to display promising properties and performance as electrodes of SSOFC, such as (Ln 0.4 ) x Sr 0.6 Co 0.2 Fe 0.7 Nb 0.1 O 3-δ (Ln = Pr, La) [17,18]. These materials can be partially reduced to K 2 NiF 4 -type layered perovskite oxides and metallic particles at anode which show excellent…”

“…2a. K -1 , 20-900 o C) [17] and La-doped BaFeO 3 (~21.5 × 10 -6 K -1 , RT-800 o C) [31], although they are still higher than the TEC values of commonly used electrolytes, such as SDC (11.8×10 -6 K -1 , RT-800°C) [19] and ScSZ (YSZ) (~10.5×10 -6 K -1 , RT-800°C) [32]. Therefore, the LSFC as cathode should have better adhesion and thermal capability with electrolytes, which is beneficial for the cell fabrication and the long-term operation durability of SOFC.…”

Electrochemical characterization of B-site cation-excess Pr2Ni0.75Cu0.25Ga0.05O4+δ cathode for IT-SOFCs

“…Especially for appropriate A-site excess of the sample with x = 0.3, the oxygen adsorption process was promoted. Zhang et al [28] reported that the excess of A-site Pr elements in (Pr 0.4 ) x Sr 0.6 Co 0. µmol min −1 cm −2 at 1273 K with a 0.5 mm thickness, which exceeds those of typical perovskite-type MIECs. Therefore, an excess amount of Ga for B-site material PNCG is expected to bring better electrochemical properties as a cathode material at intermediate temperature.…”