Layered-perovskite oxides with in situ exsolved Co–Fe alloy nanoparticles as highly efficient electrodes for high-temperature carbon dioxide electrolysis

Abstract

Carbon dioxide (CO2) reduction using solid oxide electrolysis cells (SOEC) has attracted great attention because of the high efficiency and fast kinetics enabled by the high function temperatures. Electrode materials...

Revealing the Impact of Steam Concentration on the Activity and Stability of Double-Perovskite Air Electrodes for Proton-Conducting Electrolysis Cells

“…We also analyzed the O 1s spectra for PBSCF to reveal the potential phase of the segregation layer. As shown in Figure c, the O 1s spectra of PBSCF were fitted into four components, namely, surface H 2 O, hydroxyl groups or surface-adsorbed oxygen, defective oxygen, and lattice oxygen located at ∼533, ∼531.6, ∼530.1, and ∼528.5 eV, respectively. − After annealing in steam, the peaks corresponding to the surface adsorbed water and surface hydroxyl groups significantly increased. This result implied the formation of hydroxyl groups on the surface of PBSCF, which may be related to the formation of Ba-OH and Sr-OH surface phases …”

Sun, heat and electricity. A comprehensive study of non‐pollutant alternatives to produce green hydrogen

“…Recently, composite Cu‐Cl medium‐temperature electrolysis membranes 189,190 and the use of ammonia based thermochemical energy storage and layered‐perovskite oxides electrodes for high temperature electrolysis stand out 191‐193 . Heat and gas route improved schemes show energy demand reduction, especially in SOEC 194 …”

“…188 Recently, composite Cu-Cl medium-temperature electrolysis membranes 189,190 and the use of ammonia based thermochemical energy storage and layered-perovskite oxides electrodes for high temperature electrolysis stand out. [191][192][193] Heat and gas route improved schemes show energy demand reduction, especially in SOEC. 194 The advances discussed for medium and high temperature water splitting are synthesized in the scheme of the main advances and historical achievements in thermolysis technology, Figure 9.…”

A highly efficient and stable perovskite cathode with in situ exsolved NiFe alloy nanoparticles for CO2 electrolysis

“…[28][29][30] The exsolved nanoparticles are strongly bonded to the host oxides, thus showing a much improved stability. 31,32 The present study was thus intended to enhance the electrochemical activity and durability of a perovskite oxide (La 0.75 Sr 0.25 ) 0.95 Cr 0.5 Fe 0.35 Ni 0.15 O 3Àd (LSCrFN) based cathode via exsolution of NiFe nanoparticles. The exsolution of NiFe nanoparticles from LSCrFN oxide was analyzed in detail.…”

“…28–30 The exsolved nanoparticles are strongly bonded to the host oxides, thus showing a much improved stability. 31,32…”