Heterogeneity in the Mo doped La0.55Sr0.45FeO3 cathode for direct CO2 electrolysis

Pr-Doped SrTi0.5Mn0.5O3−δ as an Electrode Material for a Quasi-Symmetrical Solid Oxide Fuel Cell Using Methane and Propane Fuel

“…There were two splitting peaks (Figure c) of Ti at 457.8 ± 0.2 and 463.4 ± 0.3 eV before and after the reduction of the two oxides, respectively, indicating that the binding energy of Ti 2p had not changed significantly. The O 1s XPS spectra of Pr30STM and Pr50STM before and after reduction (Figure d) encompassed peaks for the lattice oxygen (M–O, 529.3 eV) and oxygen vacancy (531.1 eV) or the carboxyl group (532.9 eV). , In addition, the O 1s split with a high binding energy of 528.2 eV, which may be related to the C–O absorbed on the Pr surface . Sr 3d spectra (Figure e) showed that the two main peaks were located at 132.4 and 134.1 eV, which were derived from Sr atomic bonds in SrTiO 3 .…”

“…56,57 In addition, the O 1s split with a high binding energy of 528.2 eV, which may be related to the C−O absorbed on the Pr surface. 58 Sr 3d spectra (Figure 4e) showed that the two main peaks were located at 132.4 and 134.1 eV, which were derived from Sr atomic bonds in SrTiO 3 . In addition, there were two small peaks at 133.4 and 135.5 eV, which were derived from Sr atoms in nonperovskite structures, such as Sr−Sr and Sr−O bonds on the surface.…”

Enhanced CO2electrolysis through modulation of oxygen vacancies

“…The specific reason is that the formation of oxide ion vacancies and the formation of oxide ion transport pathways induced by low valent Fe can improve the performance. 38,39 However, when Fe completely replaces Cr, a small fraction of Fe 2+ will be oxidized to Fe 4+ , which corresponds to the satellite peak at an E B of B713 eV. Furthermore, since Fe 4+ is extremely easy to lose electrons, Fe 5+ may also be present.…”

In Situ Generation of Pseudorutile Oxide as the Cathode for Direct Electrolysis of CO2

“…The active area of the cells was around 0.2 cm 2 , and the produced CO was measured with a gas chromatograph (PerkinElmer, USA) equipped with a thermal conductivity detector. 20 From the electrolysis reaction of CO 2 , 2 mol of electrons was used to produce 1 mol of CO and 1/2 mol of O 2 on the anode side. The theoretical flow rate of CO (ν CO ) in mL min −1 produced by electrolysis can be calculated using Faraday's law…”

“…Mixed ion and electron conductivity (MIEC) oxide materials having much better redox stability than the Ni-YSZ cathodes made them promising candidates for the SOEC cathode. − Perovskite-based ceramic oxides, such as La 0.55 Sr 0.45 Fe 1– x Mo x O 3 (LSFM), La 0.2 Sr 0.8 TiO 3+δ (LST), La 0.7 Sr 0.3 Cr 0.5 Fe 0.5 O 3−δ (LSCF), and Sr 2 Fe 1.5 Mo 0.5 O 6−δ (SFM), have been studied extensively as MIEC cathodes for CO 2 electrolysis. However, the use of rare-earth/alkaline-earth elements in a perovskite could increase the cost of the materials or decrease the atomic efficiency in the electrocatalysis as they are mostly for maintaining the structure stability …”