Alkaline-earth elements (Ca, Sr and Ba) doped LaFeO3-δ cathodes for CO2 electroreduction

Promoting Active Electronic States in LaFeO3 Thin-Films Photocathodes via Alkaline-Earth Metal Substitution

“…35,36 The Fe 2p peak can be deconvoluted into three components, with the most prominent being assigned to Fe 3+ species. The smaller peaks at higher binding energies correspond to higher iron oxidation states, with some studies linking these features to Fe 4+ , 26,[35][36][37][38] although this would require systematic analysis of other Fe core levels. 39…”

Porous LaFeO3 nanofiber with oxygen vacancies as an efficient electrocatalyst for N2 conversion to NH3 under ambient conditions

“…It can be fitted four different characteristic peaks, which from low binding energy to high binding energy are attributed to lattice oxygen (O Lattice ), superoxidative oxygen species (O 2 2 − /O − ), surface adsorbed oxygen or hydroxyl groups (O ads ) and surface adsorbed H 2 O (O H2O ), respectively [59] . The amount of O 22 − /O − species is positively related to oxygen vacancies concentration[59][60][61] . It is worth noting that the ratio of O 2 2 − / O − to the total O in the O 1 s spectrum of Vo-LaFeO 3 NF is as large as 0.53, which indicates that oxygen vacancies formed on the surface of the porous LaFeO 3 .…”

Boosting CO2 electrolysis performance via calcium-oxide-looping combined with in situ exsolved Ni–Fe nanoparticles in a symmetrical solid oxide electrolysis cell

“…The lower ΔEL2-L3 and L3/L2 ratio of the reduced sample both indicate a reduced valence of Fe and hence higher electron density of Fe cations in the R-LCaFN. [30][31][32] This is an important observation since oxygen vacancies and electron density play significant roles in CO2 electroreduction. 33 To investigate the adsorption performance of CaO and the catalytic effect of Fe-Ni alloy toward CO2, in situ DRIFTS was used to characterize the CO2 adsorption and reaction of LaFe0.8Ni0.2O3 (LFN), R-LFN, LCaFN and R-LCaFN.…”