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Influence of Co and Mn Doping on the Surface Reconstruction of Faceted NiO(111) Nanosheets after the Oxygen Evolution Reaction
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Scalable Solution Processing of Cu:NiO x Nanoparticles for Perovskite Solar Cells
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RuO 2 -NiO Nanosheets on Conductive Nickel Foam for Reliable and Regeneratable Seawater Splitting
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Optimization of La 2 NiO 4+δ Electrolysis Cell Oxygen Electrode through Surfactant-Enabled LaCoO 3±δ Nanocatalyst Deposition
Lanthanum nickelate (LNO) has shown promise as a Cr-resistant air electrode material for SOECs but has suboptimal surface oxygen exchange properties. Nanocoating of the LNO surface with lanthanum cobaltite (LCO) was chosen to improve cell performance as a surface oxygen conductor. The work focused on the implementation of a two-step nano-LCO film deposition utilizing catechol molecules in a porous LNO electrode. The subgoals of the work were to maintain nanosized LCO particles/ grains to increase active surface area and to control the regularity/ homogeneity of the coating across the microstructure. To achieve these goals, a novel surfactant-enhanced liquid infiltration method was utilized, where nucleation sites were spread across the electrode structure to control the location and size of LCO particles. Various catechol surfactant compositions were evaluated for their ability to control the kinetics of nanoparticle deposition and the homogeneity of the coating. Chelated LCO was characterized by X-ray diffraction (XRD), which found a substantial improvement in LCO formation with surfactant addition and determined polymerized norepinephrine to be the best-performing surfactant, with 88.4% pure LCO formed at low temperature. X-ray photoelectron spectroscopy (XPS) confirmed LCO nanostructures formed by the two-step infiltration process, showing no impurities and a stable perovskite structure. Deposition kinetics were analyzed using atomic force microscopy (AFM), correlating infiltration times and solution molarity to nanoparticle size and distribution, the results of which were confirmed in symmetrical cell samples by scanning electron microscopy (SEM). Electrochemical impedance spectroscopy (EIS) testing demonstrated substantial improvements in polarization resistance, where the nanocoating reduced the resistance by ∼55% to 0.152 Ω·cm 2 at 700 °C and 0.039 Ω·cm 2 at 800 °C. Electrical conductivity relaxation (ECR) at this temperature confirmed an improved surface oxygen exchange coefficient of the LCO + LNO heterostructure predicted by the Bode data from EIS, alongside a reduction in activation energy by about 30%.
Actively Learned Optimal Sustainable Operation of Plasma-Catalyzed Methane Bireforming on La 0.7 Ce 0.3 NiO 3 Perovskite Catalyst
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Ultrahigh-Loading of Ir Single Atoms on NiO Matrix to Dramatically Enhance Oxygen Evolution Reaction
Abstract not provided
Enhancing surface oxygen retention through theory-guided doping selection in Li 1−x NiO 2 for next-generation lithium-ion batteries
Using a collaborated in silico and experimental approach, we designed Sb-doped LiNiO 2 with improved surface oxygen retention and electrochemical performance.
Insulator-to-metal crossover near the edge of the superconducting dome in Nd 1 − x Sr x NiO 2
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High-energy spin waves in the spin-1 square-lattice antiferromagnet La 2 NiO 4
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Spontaneous phase segregation of Sr 2 NiO 3 and SrNi 2 O 3 during SrNiO 3 heteroepitaxy
Dynamic phase segregation, driven by the instability of Ni 2+ , occurs during SrNiO 3 heteroepitaxy growth.
Adsorption of oxygen on nio-li2o catalytic agents
Adsorption of oxygen on nickel oxide-lithium oxide catalysts
Solid solubility and lattice parameter of nio- mno.
Lattice parameter of nickel oxide-manganese oxide solid solutions
Raman scattering by phonons and magnons and phonon-magnon interactions in NiO.
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Defect structure of NiO and rates and mechanisms of formation from atomic oxygen and nickel
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The kinetics of the O2/CO2 reaction in molten carbonate - Reaction orders for O2 and CO2 on NiO
The kinetics of the O2/CO2 reaction in molten carbonate is investigated using paste electrolytes and nickel sinter electrodes. A two-step approach to the determination of reaction orders is employed. First, exchange currents at various P(CO2) and P(O2) were measured using the low polarization method. Second, alpha(+) and alpha(-) values were obtained from the slope of the Allen-Hickling plot for current densities low enough so that concentration polarization within the electrode can be neglected. The reaction orders are + 1/4 in CO2 and + 5/8 in O2 in the cathodic direction, and - 3/4 in CO2 and + 1/8 in O2 in the anodic direction.