Flexible tungsten disulfide superstructure engineering for efficient alkaline hydrogen evolution in anion exchange membrane water electrolysers

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: July 8, 2024

Abstract Anion exchange membrane (AEM) water electrolysis employing non-precious metal electrocatalysts is a promising strategy for achieving sustainable hydrogen production. However, it still suffers from many challenges, including sluggish alkaline evolution reaction (HER) kinetics, insufficient activity and limited lifetime of ampere-level-current-density HER. Here, we report an efficient HER at industrial-level current density wherein flexible WS 2 superstructure designed to serve as the cathode catalyst AEM electrolysis. The features bond-free van der Waals interaction among low Young’s modulus nanosheets ensure excellent mechanical flexibility, well stepped edge defect structure realize high catalytic favorable interface micro-environment. unique can effectively withstand impact high-density gas-liquid exchanges facilitate mass transfer, endowing long-term durability under industrial-scale density. An electrolyser containing this exhibits cell voltage 1.70 V deliver constant 1 A cm −2 over 1000 h with negligible decay rate 9.67 μV −1 .

Language: Английский

---

Efficient optimization of electron transfer pathway by constructing phosphide/ceria interface boosts seawater hydrogen production

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 95, P. 490 - 498

Published: April 15, 2024

Language: Английский

---

Self-standing hollow Ni-doped Mo₂C nanotube arrays induced by the Kirkendall effect for an efficient hydrogen evolution reaction in acidic and alkaline solutions

Inorganic Chemistry Frontiers, Journal Year: 2024, Volume and Issue: 11(18), P. 5894 - 5904

Published: Jan. 1, 2024

Ni-Mo 2 C nanotube arrays with a large specific surface area, superhydrophilic/superaerophobic and excellent charge transfer capability as efficient HER catalysts.

Language: Английский

---

Enhanced overall water splitting by morphology and electronic structure engineering on pristine ultrathin metal-organic frameworks

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

---

Contemporary advancements and prospective outlook on feasible lithium-ion batteries based on silicon anodes

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: 1014, P. 178763 - 178763

Published: Jan. 22, 2025

Language: Английский

---

Moderate Active Hydrogen Generation over a Ni₂P/CoP Heterostructure for One-Step Electrosynthesizing of Azobenzene with High Selectivity

Nano Letters, Journal Year: 2025, Volume and Issue: 25(2), P. 828 - 836

Published: Jan. 6, 2025

Through hydrogenation and N-N coupling, azobenzene can be produced via highly selective electrocatalytic nitrobenzene reduction, offering a mild, cost-effective, sustainable industrial route. Inspired by the density functional theory calculations, introduction of H* active Ni2P into CoP, which reduces water dissociation energy barrier, optimizes adsorption, moderates key intermediates' is expected to assist its ability for one-step electrosynthesizing azobenzene. A self-supported NiCo@Ni2P/CoP nanorod array electrode was synthesized, featuring NiCo alloy nanoparticles within Ni2P/CoP shell. By virtue thermodynamically optimal heterostructure, along with overall fast electron transport in core-shell integrated electrode, abundant interfacial structure attains great conversion 94.3%, especially prominent selectivity 97.2%, Faradaic efficiency 94.1% at -0.9 V (vs Hg/HgO). High-purity crystals also self-separate under refrigeration postelectrolysis. This work provides an energy-efficient scalable pathway economical preparation hydrogenation.

Language: Английский

---

High-dispersion / N-doping FeCo@NC with abundant active sites for high-activity oxygen reduction catalysts

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: 1020, P. 179295 - 179295

Published: Feb. 26, 2025

Language: Английский

---

Tuning α‐MnOOH Formation via Atomic‐Level Fe Introduction for Superior OER Performance

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Abstract The arrangement of atoms in the catalyst directly impacts catalytic performance. Herein, a heteroatom doping strategy is found as an effective approach for regulation MnO 2 crystal reconstruction during oxygen evolution reaction (OER), thereby ensuring and optimizing performance catalyst. Real‐time tracking dynamic surface reveals that δ‐MnO transforms into less active γ‐MnOOH phase, while single‐atom Fe facilitates formation highly α‐MnOOH phase. asymmetric Fe─O─Mn bonds induce lattice distortions promote electron transfer from to Mn with increase 3 ⁺ content, which conducive intensifying spillover crucial factor OER activity. Theoretical calculations also demonstrate sites regulated representative can reduce energy barrier step process (the *O *OOH transition), thus significantly enhancing typical achieves successful processes through doping, holds significant implications developing new class catalysts, not limited catalysts reported this study.

Language: Английский

---

Exploring One-Step Synthesis of Coral-Like NiCo₂S₄ Microsphere Cathodes and Cavity-Like Cu₂O–CuO Nanoparticle Anodes for Asymmetric Supercapacitors

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: April 6, 2025

Language: Английский

---

Regulating hydrogen adsorption via built-in electric field-driven charge transfer at the heterointerface for enhanced alkaline/seawater hydrogen evolution

Journal of Material Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

---