Multi-functional, high-performing fuel electrode for dry methane oxidation and CO2 electrolysis in reversible solid oxide cells

Enhancing Oxygen Reduction Activity and Structural Stability of La0.6Sr0.4FeO3−δ by 1 mol % Pt and Ru B-Site Doping for Application in All-Perovskite IT-SOFCs

“…Thus, the development of reliable electrodes that show high chemical and mechanical compatibility with the electrolyte, thermal stability during fabrication and operation, low cost, and fuel flexibility is still a matter of investigation. − La 0.6 Sr 0.4 FeO 3−δ (LSF) lanthanum ferrite ensure remarkably high electrical conductivity and good chemical compatibility with all commercially used electrolytes. − However, undoped LSF shows low electrocatalytic activity toward the oxygen reduction reaction (ORR), especially at lower temperatures, and poor structural stability when exposed to highly reducing conditions. , The strategy of B-site doping with noble metal catalysts, such as Ru and Pt, can be effective in improving the electrocatalytic properties, making the doped compounds suitable for electrode applications in the intermediate-temperature range. − As low as 1 mol % noble metal doping keeps the material cost comparable to that of commercial 20 mol % Co-doped ferrite (LSFCo). Indeed, the demand for cobalt is expected to increase to a factor 10 in the next few years.…”

Recent advances in ambient electrochemical methane conversion to oxygenates using metal oxide electrocatalysts

“…4,[20][21][22][23][24] However, the SMR process necessitates high temperature and pressure conditions, is energy-intensive, and generates substantial carbon emissions. [25][26][27] Therefore, it is crucial to develop practical and environmentally friendly alternatives to methane conversion. In the field of catalysis, the strategies to convert methane to oxygenates are divided into five areas: bio-catalysis, homogeneous catalysis, thermal heterogeneous catalysis, photocatalysis, and electrocatalysis.…”

“…28,29 Electrocatalysis distinguishes itself due to the following advantages: (i) it attains adequate yields at a relatively low cost; (ii) it typically operates under ambient conditions at low temperatures (100 °C); and (iii) it facilitates convenient scalability. 8,21,26,[30][31][32][33] Notably, in the electrochemical process, kinetics and, therefore, the rate of product generation and their selectivity are controlled by monitoring the applied potential. 34 The two types of methane electrochemical conversions are direct oxidation and indirect oxidation.…”

Copper-Enhanced CO2 Electroreduction in SOECs

“…21−23 Alternatively, substitution with Mo or Mn resulted in a controlled phase transition to a Ruddlesden−Popper layered oxide after reduction. 24,25 This latter strategy might be less effective than the former, as the volume variation upon phase transition may lead to electrode delamination. Concerning stability, innovative electrodes for CO 2 -RR, tested on lab-scale systems, show durability in the range of tens to hundreds of hours.…”

“…Structural instability represents a serious issue for fuel electrodes in SOEC configuration too, especially when CO is mixed with the CO 2 feed or under large cathodic overpotential. B-site substitution with Cr or Ti was reported to stabilize the lanthanum ferrite lattice, retaining the perovskite structure in reducing conditions. − Alternatively, substitution with Mo or Mn resulted in a controlled phase transition to a Ruddlesden–Popper layered oxide after reduction. , This latter strategy might be less effective than the former, as the volume variation upon phase transition may lead to electrode delamination. Concerning stability, innovative electrodes for CO 2 -RR, tested on lab-scale systems, show durability in the range of tens to hundreds of hours. , …”