Molybdenum substituted Ni-Mn cobaltite spinel nanostructure for high performance Ultracapacitors

Materials Science and Engineering B, Год журнала: 2025, Номер 317, С. 118230 - 118230

Опубликована: Март 23, 2025

Язык: Английский

---

Spinel CuCo₂O₄ Microflowers with Highly Exposed High-Index (112) Facets for Electrocatalytic Glucose Oxidation

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 11, 2025

The design of nanomaterials enclosed by high-index facets plays a critical role in the surface-sensitive properties. Herein, hierarchical CuCo2O4 microflowers (CCO-F) with highly exposed (112) are rationally designed via solvothermal method followed calcination. CCO-F composed 30 nm-thick nanoflakes and have an ultrahigh specific surface area ca. 205.48 m2 g–1. Additionally, nanoparticle-assembled microspheres (CCO-S) prepared, these nanoparticles partly (110) facets. Abundant octahedrally coordinated Co3+ (Co3+Oh) tetrahedrally Cu2+ (Cu2+Td) exist facet, especially Co3+Oh (with density 0.063 Å–2); moreover, facet possesses high Gibbs free energy (2.7367 J m–2). Therefore, significant advantages adsorbing glucose conducting subsequent redox reactions. In addition, microstructure promotes reaction kinetics CCO-F. Benefiting from features, CCO-F-modified electrode exhibits sensitivities (1351.2 598.7 μA mM–1 cm–2), wide linear ranges (1 μM–3 mM 4–10 mM), rapid response time, low detection limit, excellent stability, good selectivity. This work indicates that exposure percentage is effective approach to exploring high-performance electrocatalysts for detection.

Язык: Английский

---

Copper-incorporated zinc manganite as a novel catalyst for activating peroxymonosulfate in the degradation of tetracycline

Separation and Purification Technology, Год журнала: 2024, Номер 354, С. 128673 - 128673

Опубликована: Июль 5, 2024

Язык: Английский

---

Overview on Spinel Oxides: Synthesis and Applications in Various Fields

Physics of the Solid State, Год журнала: 2024, Номер 66(9), С. 327 - 340

Опубликована: Сен. 1, 2024

Язык: Английский

---

Accelerating the discovery of direct bandgap doped-spinel photovoltaic materials: A target-driven approach using interpretable machine learning

Solar Energy Materials and Solar Cells, Год журнала: 2024, Номер 271, С. 112881 - 112881

Опубликована: Апрель 25, 2024

Язык: Английский

---

Morphology-Driven Bifunctional Activity of Layered Birnessite-Based Materials toward Oxygen Electrocatalysis

ACS Omega, Год журнала: 2025, Номер 10(5), С. 4248 - 4260

Опубликована: Фев. 2, 2025

The chemical, structural, and morphological diversity of birnessite, a 2D layered MnO2, has opened avenues for its application as an electrocatalyst toward both the oxygen reduction reaction (ORR) evolution (OER). Among pristine birnessites prepared by different methods, freestanding flakes (primary structure) obtained from molten salt (MS-KMnO) showed remarkable bifunctional activity compared to samples with thicker plates or hierarchical honeycomb-like (type-I secondary morphology. While ORR onset potential (Eonset) halfwave (E1/2) MS-KMnO were recorded at 0.89 0.81 V vs RHE, respectively, OER overpotential (η) was found be 300 mV. We demonstrated heat-induced structure modification method, which led decrease in activity. In contrast previous studies, Co-doped birnessite (Co-KMnO) lower (ORR, E1/2 = 0.72 V; OER, η= 460 mV) MS-KMnO. Co-KMnO interwoven wrinkled sheet-like (type-II morphology, Co3+ present in-layer interlayer. However, Co-KMnO/360 temperature, areal coverage type-II reduces, leading increase (E1/2 0.76 V) (η 440 chronopotentiometry 100 h constant current 50 mA cm–2 1.62 1.89 characterization sample post-treatment degradation after 1000 CV cycles regions formation structures substantial Mn3+/Mn4+ ratio. This study demonstrates that morphology tuning within system marked effect on

Язык: Английский

---

Exploring Mg2+ doped CoCr2O4 Nanoparticles: Eco-Friendly Pigments, radiation dosimeters and latent fingerprint visualization

Materials Science and Engineering B, Год журнала: 2025, Номер 317, С. 118217 - 118217

Опубликована: Март 17, 2025

Язык: Английский

---

Exploring spinel oxides from bimetallic to high-entropy with a focus on the structure and performance in the oxygen evolution reaction

Journal of Materials Chemistry A, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

A schematic representation of the transformation from bimetallic to high entropy spinel oxides for oxygen evolution reaction.

Язык: Английский

---

One-step synthesized Nb₂O_5−y-decorated spinel-type (Ni,V,Mn)₃O_4−x nanoflowers for boosting electrocatalytic reduction of nitrogen into ammonia

Green Chemistry, Год журнала: 2023, Номер 25(24), С. 10498 - 10512

Опубликована: Янв. 1, 2023

Two renewable methods for reducing greenhouse gas emissions associated with ammonia (NH 3 ) production are the H 2 -combined Haber–Bosch process and electrochemical nitrogen reduction reaction (eNRR).

Язык: Английский

---

Structural, Optical and Humidity Sensing performance of Lanthanum doped CoCr2O4 nano-ceramics for Sensor Applications

Ceramics International, Год журнала: 2024, Номер 50(21), С. 44056 - 44067

Опубликована: Авг. 22, 2024

Язык: Английский

---