M. Parras
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View article: Crystallization of manganese (V) oxides by hydroflux synthesis: Control of anisotropic growth and electrochemical stability
Crystallization of manganese (V) oxides by hydroflux synthesis: Control of anisotropic growth and electrochemical stability Open
Despite intriguing optical, magnetic, and redox properties, inorganic materials containing pentavalent manganese (Mn5+) are rare and could never be designed as shape-controlled crystals, which limits the ability to tune properties. Herein,…
Evaluating the impact of iron impurities in KOH on OER performance of BaNiO3 single crystals using scanning electrochemical cell microscopy Open
Understanding the oxygen evolution reaction (OER) electrocatalysis requires a careful understanding of the surface and activity evolution of well-defined materials. An especially promising candidate is the BaNiO3 hexagonal perovskite, matc…
Exploring Reversible Redox Behavior in the 6H-BaFeO<sub>3−δ</sub> (0 < δ < 0.4) System: Impact of Fe<sup>3+</sup>/Fe<sup>4+</sup> Ratio on CO Oxidation Open
This work is devoted to evaluating the relationship between the oxygen content and catalytic activity in the CO oxidation process of the 6H-type BaFeO3-δ system. Strong evidence is provided about the improvement of catalytic performance wi…
View article: BaNiO3 electrocatalysts for oxygen evolution reaction: the role of synthetic methods
BaNiO3 electrocatalysts for oxygen evolution reaction: the role of synthetic methods Open
BaNiO3 and other Ba-Ni-O related phases are among the most active non-precious electrocatalysts towards the oxygen evolution reaction (OER) in basic media. In this work, we compare the electrocatalytic activities of the hexagonal perovskit…
Exploring Reversible Redox behavior in the 6H-BaFeO3-d (0 < d < 0.4) System. Impact of Fe3+/Fe4+ Ratio on Catalytic Properties. Open
This work is devoted to evaluating the relationship between oxygen content and catalytic activity on the CO oxidation process of the 6H-type BaFeO3-δ system, showing that a higher Fe oxidation state improved the catalytic performance of th…
Exploring Reversible Redox behavior in the 6H-BaFeO3-d (0 < d < 0.4) System. Impact of Fe3+/Fe4+ Ratio on Catalytic Properties. Open
This work is devoted to evaluating the relationship between oxygen content and catalytic activity on the CO oxidation process of the 6H-type BaFeO3-δ system, showing that a higher Fe oxidation state improved the catalytic performance of th…
Quantitative, Spectro-kinetic Analysis of Oxygen in Electron-Beam Sensitive, Multimetallic Oxide Nanostructures Open
The oxygen stoichiometry of hollandite, KxMnO2-δ, nanorods has been accurately determined from a quantitative analysis of scanning-transmission electron microscopy (STEM) X-Ray Energy Dispersive Spectroscopy (XEDS) experiments carried out …
Revisiting the Decomposition Process of Tetrahydrate Co(II) Acetate: A Sample’s Journey through Temperature Open
Cobalt oxides, CoO and Co3O4, were obtained from Co (II) acetate tetrahydrate. The thermal decomposition pathway of the starting product was followed by combining thermogravimetric analysis and in situ X-ray thermodiffraction. Under a nitr…
Exceptional Low-Temperature CO Oxidation over Noble-Metal-Free Iron-Doped Hollandites: An In-Depth Analysis of the Influence of the Defect Structure on Catalytic Performance Open
A family of iron-doped manganese-related hollandites, K x Mn1-y Fe y O2-δ (0 ≤ y ≤ 0.15), with high performance in CO oxidation have been prepared. Among them, the most active catalyst, K0.11Mn0.876Fe0.123O1.80(OH)0.09, is able to oxidize …
CSD 2038881: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
CSD 2038883: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
CSD 2038882: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
CSD 2038884: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
Hydroxyapatites as Versatile Inorganic Hosts of Unusual Pentavalent Manganese Cations Open
International audience
Unambiguous localization of titanium and iron cations in doped manganese hollandite nanowires Open
Chemical and structural features in Fe and Ti manganese doped hollandites are reported by diffraction and advanced imaging techniques.
Nickel-Doped Sodium Cobaltite 2D Nanomaterials: Synthesis and Electrocatalytic Properties Open
International audience
Multicationic Sr<sub>4</sub>Mn<sub>3</sub>O<sub>10</sub> mesostructures: molten salt synthesis, analytical electron microscopy study and reactivity Open
Molten salt synthesis of anisotropic Sr4Mn3O10 particles.
Atomically‐resolved insight of unusual Sr‐Mn(V) oxyhydroxide Open
Inorganic compounds containing Mn(V) in tetrahedral coordination are known to show strong optical absorption, producing turquoise‐ to green‐colored compounds [1]. The existence of hypermanganate anion MnO 4 3‐ has been found, for example, …
Analytical Atomic‐Resolution Microscopy of Oxygen Deficient <span>Ca2Mn3O8‐d</span> Open
Manganese related perovskites (AMnO 3 , A=alkaline earth) present a wide range of fascinating functional properties due to the ability of Mn to adopt several oxidation states and different coordination polyhedra. Regarding their catalytic …
Revealing Lattice Oxygen Exchange During <span>CO</span> Oxidation over 6 <span>H</span> ‐ <span>B</span> a <span>F</span> eO3‐δ Catalyst Nanoparticles by Diffraction and Atomic Resolution Techniques Open
Eliminating or reducing the amount of noble metals and rare earths in catalysts is a primary issue to reach the goal of sustainable development. The substitution of noble metals by 3d metals is receiving increasing attention. Related to th…