Core–Shell Co‐Co_xP Nanoparticle‐Embedded N‐Doped Carbon Nanowhiskers Hollow Sphere for Efficient Oxygen Evolution Electrocatalysis

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 26, 2024

Abstract The development of efficient oxygen evolution reaction (OER) electrocatalysts is critical to overcome the efficiency bottleneck in hydrogen generation via water electrolysis. Hollow nanostructured materials have emerged as a hot topic for electrocatalysis research because their advantages, including abundant active sites, large contact area between catalyst and electrolyte, short transmission path. As highly stable OER electrocatalysts, cobalt‐based attracted more attention. In this work, cobalt metal/cobalt phosphides/nitrogen‐doped carbon composites (Co‐Co x P/NC) with hierarchical hollow structure are designed by using ZIF‐67 microspheres precursors. By coating ZIF‐8 on surface further carbonizing, nanowhiskers successfully formed spheres under catalytic effect Co nanoparticles at high temperature. subsequent phosphating process, solid nanocrystalline particles transformed into core–shell CoP 2 P account Kirkendall effect. Through optimization microstructure material synergistic transition metal, metal phosphide, nitrogen doping, overpotential optimal only 287 mV 10 mA cm −2 current density 1 m KOH.

Язык: Английский

---

Defect engineering and Ni promoter synergistically accelerating electron transfer to Ru0 sites in UiO-66(Ce) for dicyclopentadiene hydrogenation under mild condition

Nano Research, Год журнала: 2024, Номер unknown

Опубликована: Сен. 7, 2024

Язык: Английский

---

Single‐Atomic Co‐N‐C Sites Anchored on Helical Carbonaceous Nanotubes for the Oxygen Reduction Reaction

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 7, 2024

Abstract Metal‐coordinated N‐doped carbon (M‐N‐C) materials with highly curved structures have become a promising class of electrocatalysts for the oxygen reduction reaction (ORR). However, stability these remains problem due to traditional post‐metal loading strategy. Herein, single‐atomic Co‐N‐C active sites anchored on helical carbonaceous nanotubes (HCNTs) are prepared (Co‐N‐C@HCNT) by pyrolyzing Co porphyrins and polypyrroles (PPys) mixtures at high‐temperature one‐step method. Aberration‐corrected high‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM) X‐ray absorption fine structure (XAFS) measurements confirm Co‐N 4 coordination Co‐N‐C@HCNT. The optimized Co‐N‐C@HCNT exhibits excellent catalytic ORR activity half‐wave potential ( E 1/2 ) 0.86 V versus reversible hydrogen electrode (vs RHE) compared Co‐N‐C@CNT without = 0.81 vs measured in 0.1 m KOH. also displays slight current decrease (4%) after running 10 h featuring tightly HCNTs electrostatic interactions between metal PPys. Theoretical calculations indicate that can increase charge d‐band center site, which enhances electrocatalytic activity. This work provides simple but effective strategy construct M‐N‐C materials.

Язык: Английский

---

Exposure engineering of active sites of Co-N-C for efficient oxygen reduction reaction

Chemical Engineering Journal, Год журнала: 2025, Номер 505, С. 159449 - 159449

Опубликована: Янв. 9, 2025

Язык: Английский

---

Modulating the electronic structure of macroporous SrTiO3 through cobalt doping for enhance photocatalytic hydrogen evolution

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 80, С. 104 - 114

Опубликована: Июль 14, 2024

Язык: Английский

---

Lowering Charge Potential of Li-O2 Battery to 3.25 V through a Facile Lithiation of Pd-CN Cathode Catalyst

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 358, С. 124435 - 124435

Опубликована: Июль 26, 2024

Язык: Английский

---

Electronic and porous structure engineering of coordination polymer-derived carbon for enhanced bifunctional oxygen electrocatalysts

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 102, С. 1411 - 1420

Опубликована: Янв. 17, 2025

Язык: Английский

---

Theoretical insights into performance descriptors and their impact on activity optimization strategies for cobalt-based electrocatalysts

Coordination Chemistry Reviews, Год журнала: 2025, Номер 533, С. 216560 - 216560

Опубликована: Фев. 27, 2025

Язык: Английский

---

Defect and doping synergistic optimization for efficient and durable alkaline seawater hydrogen production

Journal of Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 137354 - 137354

Опубликована: Март 1, 2025

Язык: Английский

---

Co-Fe3C nanoparticles encapsulated in N-doped carbon matrix carbon as bifunctional electrocatalyst for oxygen reaction and reversible zinc-air batteries

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179961 - 179961

Опубликована: Март 1, 2025

Язык: Английский

---