Impact of the Metal-Organic Frameworks Polymorphism on the Electrocatalytic Properties of CeO toward Oxygen Evolution.

Hydrogen (H) is a viable alternative as a sustainable energy source, however, new highly efficient electrocatalysts for water splitting are still a research challenge. In this context, metal-organic frameworks (MOFs)-derived nanomaterials are prominent high-performance electrocatalysts for hydrogen production, especially in the oxygen evolution reaction (OER). Here, a new synthesis of two cerium oxide (CeO) electrocatalysts using Ce-succinates MOFs as templates is proposed.

The effect of particle size on structural and catalysts for oxygen evolution reaction of (CoFeNiMnCr)O prepared by controlled synthesis with polyvinylpyrrolidone (PVP).

In this study, high-entropy spinel oxides (CoNiMnFeCr)O were synthesized using a PVP-assisted sol-gel method, marking the first report of this approach for producing high-entropy oxides. This method provides new insights into morphology customization through precise temperature control during calcination. Samples were calcined at 800, 900, and 1000 °C, and structural, optical, and electrochemical characterizations were performed to evaluate the impact of synthesis conditions on the oxygen evolution reaction (OER) performance.

CoO/activated carbon nanocomposites as electrocatalysts for the oxygen evolution reaction.

The Oxygen Evolution Reaction (OER) is crucial in various processes such as hydrogen production water splitting. Several electrocatalysts, including metal oxides, have been evaluated to enhance the reaction efficiency. Zeolitic Imidazolate Framework-67 (ZIF-67) has been employed as a precursor to produce CoO, showing high OER activity.

Folic Acid and Vitamin B12 Prevent Deleterious Effects of Rotenone on Object Novelty Recognition Memory and Expression in an Animal Model of Parkinson's Disease.

Parkinson's disease (PD) is characterized by a range of motor signs, but cognitive dysfunction is also observed. Supplementation with folic acid and vitamin B12 is expected to prevent cognitive impairment. To test this in PD, we promoted a lesion within the substantia nigra of rats using the neurotoxin rotenone.

Nanoparticles of Mixed-Valence Oxides MnCOO (0 ≤ X ≤ 1) Obtained with Agar-Agar from Red Algae (Rhodophyta) for Oxygen Evolution Reaction.

The development of efficient electrocatalysts for the oxygen evolution reaction (OER) is of paramount importance in sustainable water-splitting technology for hydrogen production. In this context, this work reports mixed-valence oxide samples of the MnCoO type (0 ≤ X ≤ 1) synthesized for the first time by the proteic sol-gel method using Agar-Agar as a polymerizing agent. The powders were calcined at 1173 K, characterized by FESEM, XRD, RAMAN, UV-Vis, FT-IR, VSM, and XPS analyses, and were investigated as electrocatalysts for the oxygen evolution reaction (OER).

Metal-organic frameworks as template for synthesis of Mn/Mn mixed valence manganese cobaltites electrocatalysts for oxygen evolution reaction.

Cobalt-based oxides are among the most promising electrocatalysts for oxygen evolution reactions (OER). In this context, this work reports the synthesis of manganese-doped cobaltites using the Zeolitic-Imidazolate Frameworks 67 (ZIF-67) as template. The incorporation of manganese ions into ZIF-67 structure was evaluated in ethanol and methanol, in order to obtain the best synthetic route.

1D hollow MFeO (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction.

The development of low-cost transition metal electrocatalysts for the oxygen evolution reaction (OER) has been the focus of intense research. Herein, we report for the first time the synthesis of one dimensional (1D) hollow MFeO (M = Cu, Co and Ni) fibers by the Solution Blow Spinning (SBS) technique and their performance towards OER in alkaline medium. The formation mechanism of the hollow structure and the influence of the fibrillar morphology on the performance of electrocatalysts were discussed.