Anna Rabe
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View article: Catalytic Activity of Cobalt Ferrites in Water Oxidation Reactions and Its Defect Dependency
Catalytic Activity of Cobalt Ferrites in Water Oxidation Reactions and Its Defect Dependency Open
CoFe 2 O 4 (CFO) nanoparticles were synthesized via controlled co‐precipitation with subsequent calcination at 400 °C, 500 °C, and 600 °C to systematically investigate the influence of thermal treatment on mesostructure, catalytic performa…
View article: Local solid-state processes adjust the selectivity in catalytic oxidation reactions on cobalt oxides
Local solid-state processes adjust the selectivity in catalytic oxidation reactions on cobalt oxides Open
Transition metal oxides are excellent catalysts for selective oxidation reactions, which are a prominent source of industrially relevant chemicals. However, these reactions suffer from multiple competing reaction pathways, limiting the sel…
View article: Metastable Crystalline Cobalt Iron Oxide Nano‐Flakes with Antiferromagnetic/Ferrimagnetic Composition Mosaicity
Metastable Crystalline Cobalt Iron Oxide Nano‐Flakes with Antiferromagnetic/Ferrimagnetic Composition Mosaicity Open
By thermal decomposition of a crystalline hydroxycarbonate precursor with a Co:Fe ratio of 2:1, crystals with alternating ferrimagnetic and antiferromagnetic nano‐domains were synthesized using a facile synthetic approach that combined bot…
View article: Aerobic Cyclohexane Oxidation Catalyzed by Vanadium‐Substituted LaCoO<sub>3</sub> Perovskites in the Liquid Phase
Aerobic Cyclohexane Oxidation Catalyzed by Vanadium‐Substituted LaCoO<sub>3</sub> Perovskites in the Liquid Phase Open
Spray flame‐synthesized LaV x Co 1‐x O 3 perovskites (x = 0.00, 0.01, 0.03, 0.05, 0.3, and 0.5) were found to enhance the KA oil (mixture of cyclohexanol and cyclohexanone) selectivity in the aerobic liquid‐phase oxidation of cyclohexane. …
View article: Highly loaded bimetallic iron-cobalt catalysts for hydrogen release from ammonia
Highly loaded bimetallic iron-cobalt catalysts for hydrogen release from ammonia Open
Ammonia is a storage molecule for hydrogen, which can be released by catalytic decomposition. Inexpensive iron catalysts suffer from a low activity due to a too strong iron-nitrogen binding energy compared to more active metals such as rut…
View article: Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation
Tailoring Pore Size and Catalytic Activity in Cobalt Iron Layered Double Hydroxides and Spinels by Microemulsion‐Assisted pH‐Controlled Co‐Precipitation Open
Cobalt iron containing layered double hydroxides (LDHs) and spinels are promising catalysts for the electrochemical oxygen evolution reaction (OER). Towards development of better performing catalysts, the precise tuning of mesostructural f…
View article: Role of Nanoscale Inhomogeneities in Co<sub>2</sub>FeO<sub>4</sub> Catalysts during the Oxygen Evolution Reaction
Role of Nanoscale Inhomogeneities in Co<sub>2</sub>FeO<sub>4</sub> Catalysts during the Oxygen Evolution Reaction Open
Spinel-type catalysts are promising anode materials for the alkaline oxygen evolution reaction (OER), exhibiting low overpotentials and providing long-term stability. In this study, we compared two structurally equal Co2FeO4 spinels with n…
View article: Structure‐Performance Relationship of LaFe<sub>1‐x</sub>Co<sub>x</sub>O<sub>3</sub> Electrocatalysts for Oxygen Evolution, Isopropanol Oxidation, and Glycerol Oxidation
Structure‐Performance Relationship of LaFe<sub>1‐x</sub>Co<sub>x</sub>O<sub>3</sub> Electrocatalysts for Oxygen Evolution, Isopropanol Oxidation, and Glycerol Oxidation Open
Mitigating high energy costs related to sustainable H 2 production via water electrolysis is important to make this process commercially viable. Possible approaches are the investigation of low‐cost, highly active oxygen evolution reaction…
View article: Dynamics of Reactive Oxygen Species on Cobalt-Containing Spinel Oxides in Cyclic CO Oxidation
Dynamics of Reactive Oxygen Species on Cobalt-Containing Spinel Oxides in Cyclic CO Oxidation Open
Reactive oxygen species (ROS) are considered to be responsible for the high catalytic activity of transition metal oxides like Co3-xFexO4 in oxidation reactions, but the detailed influences of catalyst composition and morphology on the for…
View article: The Effect of Water on the 2‐Propanol Oxidation Activity of Co‐Substituted LaFe<sub>1−x</sub>Co<sub>x</sub>O<sub>3</sub> Perovskites
The Effect of Water on the 2‐Propanol Oxidation Activity of Co‐Substituted LaFe<sub>1−x</sub>Co<sub>x</sub>O<sub>3</sub> Perovskites Open
Perovskites are interesting oxidation catalysts due to their chemical flexibility enabling the tuning of several properties. In this work, we synthesized LaFe 1−x Co x O 3 catalysts by co‐precipitation and thermal decomposition, characteri…
View article: The Roles of Composition and Mesostructure of Cobalt‐Based Spinel Catalysts in Oxygen Evolution Reactions
The Roles of Composition and Mesostructure of Cobalt‐Based Spinel Catalysts in Oxygen Evolution Reactions Open
By using the crystalline precursor decomposition approach and direct co‐precipitation the composition and mesostructure of cobalt‐based spinels can be controlled. A systematic substitution of cobalt with redox‐active iron and redox‐inactiv…
View article: Synergistic Effects of Co and Fe on the Oxygen Evolution Reaction Activity of LaCo<sub><i>x</i></sub>Fe<sub>1−<i>x</i></sub>O<sub>3</sub>
Synergistic Effects of Co and Fe on the Oxygen Evolution Reaction Activity of LaCo<sub><i>x</i></sub>Fe<sub>1−<i>x</i></sub>O<sub>3</sub> Open
In a combined experimental and theoretical study we assess the role of Co incorporation on the OER activity of LaCo x Fe 1− x O 3 . Phase pure perovskites were synthesized up to in 0.025/0.050 steps. HAADF STEM and EDX analysis points towa…
View article: Challenges in the Application of Manganese Oxide Powders as OER Electrocatalysts: Synthesis, Characterization, Activity and Stability of Nine Different Mn<sub>x</sub>O<sub>y</sub> Compounds
Challenges in the Application of Manganese Oxide Powders as OER Electrocatalysts: Synthesis, Characterization, Activity and Stability of Nine Different Mn<sub>x</sub>O<sub>y</sub> Compounds Open
Manganese oxides are seen as potential electrocatalysts for the alkaline oxygen evolution reaction (OER). To find the most suitable OER catalyst among the large number of known manganese oxide compounds, several comparative studies of sele…
View article: The Effect of Co Incorporation on the CO Oxidation Activity of LaFe1−xCoxO3 Perovskites
The Effect of Co Incorporation on the CO Oxidation Activity of LaFe1−xCoxO3 Perovskites Open
Perovskite oxides are versatile materials due to their wide variety of compositions offering promising catalytic properties, especially in oxidation reactions. In the presented study, LaFe1−xCoxO3 perovskites were synthesized by hydroxycar…
View article: Factors Governing the Activity of α‐MnO<sub>2</sub> Catalysts in the Oxygen Evolution Reaction: Conductivity versus Exposed Surface Area of Cryptomelane
Factors Governing the Activity of α‐MnO<sub>2</sub> Catalysts in the Oxygen Evolution Reaction: Conductivity versus Exposed Surface Area of Cryptomelane Open
Cryptomelane (α‐(K)MnO 2 ) powders were synthesized by different methods leading to only slight differences in their bulk crystal structure and chemical composition, while the BET surface area and the crystallite size differed significantl…
View article: On tuning microgel character and softness of cross-linked polystyrene particles
On tuning microgel character and softness of cross-linked polystyrene particles Open
Polystyrene (PS) microgel colloids have often been used successfully to model hard sphere behaviour even though the term "gel" invokes inevitably the notion of a more or less soft, deformable object. Here we systematically study the effect…