Strontium-doped lanthanum iron nickelate oxide as highly efficient electrocatalysts for oxygen evolution reaction

摘要: Abstract Pursuing efficient and low-cost catalysts for the sluggish oxygen evolution reaction (OER) is imperative large-scale deployment of promising electrochemical technologies such as water splitting CO2 reduction. The earth-abundant perovskite based on LaNiO3-δ show promise in OER catalysis because their relatively low cost optimal electronic structure but suffer from electrode-area normalized activity. In this work, we partially substituted La with Sr Ni Fe to enable a remarkably high activity an ultra-low overpotential 374 ± 3 mV vs RHE at current density 10 mA cm−2 by electrode geometric area. This performance even surpasses benchmark RuO2. Our results that could promote OER-active sites including Ni(III), O2−2/O−, Ni/Fe ratios, which significantly improve surface intrinsic surface. Therefore, work not only developed highly catalyst towards OER, also demonstrated effective modulation interactions through A-site doping oxides key applications splitting, reduction N2 fixations.