In-situ growth of Ru/RuO2 nanoparticles decorated (La0.6Sr1.4)0.95Mn0.9Ru0.1O4 as a potential electrode for symmetrical solid oxide fuel cells

In Situ Growth of Ru/RuO2 Nanoparticle-Modified (PrBa)0.95Mn1.9Ru0.1O5+δ as a High-Performance Electrode for Symmetrical Solid Oxide Fuel Cells

“…Table depicts the structural parameters of PBMR samples, in which the Ru-doped samples all show a larger cell volume than PBM. This phenomenon is attributed to the increase of the average B-site ionic radius after Ru doping …”

“…This phenomenon is attributed to the increase of the average B-site ionic radius after Ru doping. 18 3.2. Observation of In Situ Nanoparticles.…”

“…Moreover, the coke deposition and sulfur poisoning can be avoided simply by reversing the flow of fuel and oxidizing gases . Notwithstanding these considerable advantages, the electrode materials for SSOFCs must fulfill the requirements for both fuel and oxygen electrodes, including good catalytic activities toward the oxygen reduction reaction (ORR) and HOR simultaneously, promising electrical properties and favorable stability in both reducing and oxidizing atmospheres. , As a result of these rather restrictive limitations, only a few redox-stable materials are investigated as candidate electrodes for SSOFCs, such as single perovskites (ABO 3 ), K 2 NiF 4 -type perovskites (A 2 BO 4 ), and double perovskites (AA′B 2 O 5+δ and AA′B′B″O 6 ), which usually contain Cr, Mn, Ti, and Mo elements to obtain favorable chemical stability under reducing atmospheres, for instance, single perovskite materials La 0.75 Sr 0.25 Cr 0.5 Mn 0.5 O 3−δ and La x Sr 1– x TiO 3 , , K 2 NiF 4 -type perovskite materials La x Sr 2– x FeO 4−δ and La x Sr 2– x MnO 4 , , and double perovskite material Sr 2 Fe 1.5 Mo 0.5 O 6−δ …”

“…15 Notwithstanding these considerable advantages, the electrode materials for SSOFCs must fulfill the requirements for both fuel and oxygen electrodes, including good catalytic activities toward the oxygen reduction reaction (ORR) and HOR simultaneously, promising electrical properties and favorable stability in both reducing and oxidizing atmospheres. 16,17 As a result of these rather restrictive limitations, only a few redox-stable materials are investigated as candidate electrodes for SSOFCs, 18 such as single perovskites (ABO 3 ), K 2 NiF 4 -type perovskites (A 2 BO 4 ), and double perovskites (AA′B 2 O 5+δ and AA′B′B″O 6 ), which usually contain Cr, Mn, Ti, and Mo elements to obtain favorable chemical stability under reducing atmospheres, 19 for instance, single perovskite materials La 0.75 Sr 0.25 Cr 0.5 Mn 0. 24 Recently, A-site layered double perovskite (LDP) materials with the formula AA′B 2 O 5 have drawn extensive attention as a result of their good electrochemical performance, acceptable thermal expansion coefficient (TEC), and excellent chemical endurance in oxidizing and reducing atmospheres.…”

Progress of Perovskites as Electrodes for Symmetrical Solid Oxide Fuel Cells

“…150−152 As displayed in Figure 8, the MPD of (La 0.6 Sr 1.4 ) 0.95 Mn 0.9 Ru 0.1 O 4±δ -SSZ|SSZ (153 μm) | (La 0.6 Sr 1.4 ) 0.95 Mn 0.9 Ru 0.1 O 4±δ -SSZ symmetrical cell reached 711 mW cm −2 using H 2 as fuel at 750 °C, which achieved a 370% increase compared to the unmodified cell. 152 Mixing with NiO or infiltrating the oxygen ion conductors can also effectively improve the electronic-ionic conductivity and enhance the electrochemical activity toward both ORR and HOR. 153 Four times increase in conductivity was achieved at 800 °C in H 2 −Ar atmosphere after coinfiltrating SDC and NiO into La 0.6 Sr 1.4 MnO 4±δ , and the MPD of single SSOFC increased by a factor of 9 compared to the bare cell.…”