Bamboo‐Like Carbon Nanotube‐Encapsulated Fe2C Nanoparticles Activate Confined Fe2O3 Nanoclusters Via d‐p‐d Orbital Coupling for Alkaline Oxygen Evolution Reaction DOI Open Access
Zilong Chen,

Wenxia Xu,

Weizhou Wang

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

The efficient anion exchange membrane water electrolysis is challenging with low cell voltage and long-term stability at large current density, due to the unstable anodic oxygen evolution reaction (OER). Fe-based electrocatalysts are potential candidates for OER. In materials, iron oxides always show better in alkaline solution but lower OER activity. However, catalysts previous study difficult continuously effectively activate supported on carbon during electrocatalysis. Herein, a new class of electrocatalyst: bamboo-like nanotubes (B-CNT)-encapsulated Fe

Language: Английский

Interface engineering of NiSe2/FeSe2 derived from metal-organic framework as a bifunctional catalyst for efficient UOR and OER DOI
Min Zhu,

Pengcheng Tang,

Xiaoyu Li

et al.

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 102, P. 626 - 634

Published: Jan. 11, 2025

Language: Английский

Citations

1
High‐Entropy Oxychalcogenide for Hydrogen Spillover Enhanced Hydrogen Evolution Reaction in Proton and Anion Exchange Membrane Water Electrolyzers DOI Open Access
Seunghwan Jo, Ki-Hoon Shin,

Eunmin Kim

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 29, 2025

Abstract The hydrogen spillover phenomenon provides an expeditious reaction pathway via transfer from a strong H adsorption site to weak site, enabling cost‐efficient evolution (HER) analogous platinum with moderate energy. Here, high‐entropy oxychalcogenide (HEOC) comprising Co, Ni, Mo, W, O, Se, and Te is prepared by two‐step electrochemical deposition for spillover‐enhanced HER in acidic alkaline water electrolysis. anodic–cathodic reversal current enables the co‐deposition of cations aliovalent anions, facilitating glass structure multiple active sites spillover. HEOC exhibits low overpotentials 52 57 mV obtain density 10 mA cm −2 media, respectively, long‐term stability 500 h. analytical approaches elucidate toward Mo/W−O both acid HERs. Meanwhile, other act as or dissociation‐derived hydroxide sites, showing accommodable behavior media. practically high 1 A at cell voltages 1.78 1.89 V 100 h proton anion exchange membrane electrolyzers, respectively.

Language: Английский

Citations

1
Co2P-NiMoN/NF Heterostructure Nanorod Arrays as Efficient Bifunctional Electrocatalysts for Urea Electrolysis DOI

Zixuan Zhang,

Dongxing Tan, Jing Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Electrolysis of water represents an effective method for the generation high-purity hydrogen. Nevertheless, anodic oxygen evolution reaction (OER) exhibits slow kinetics, which leads to a high electrolytic potential and induces excessive energy consumption. In this work, nickel foam-supported 3D phosphide/bimetal nitride (Co2P-NiMoN/NF) nanorod array catalyst is prepared by calcination NiMoO4, followed phosphatization Co(OH)2. The heterostructure excellent catalytic activity cathodic hydrogen (HER: η100 = 98 mV, η1000 297 mV) OER (η100 277 382 electrolysis in alkaline electrolyte, indicating its feasibility as bifunctional overall splitting (OWS). Additionally, at current density 100 mA cm-2, associated oxidation decreased roughly 160 mV when replaced with urea process (UOR), has far lower thermodynamic equilibrium potential. Density functional theory (DFT) calculations reveal that heterointerface between Co2P NiMoN enriches electronic states near Fermi level, thereby enhancing electron transfer promoting charge redistribution. This modulation precisely tunes adsorption strengths reactants during process, ultimately boosting electrocatalytic performance. A cm-2 can be attained cell voltage 1.51 V Co2P-NiMoN/NF used anode cathode cell. Notably, significantly compared (1.65 V), well previously published values. findings demonstrate efficient strategy energy-efficient production through substituting UOR electrolysis.

Language: Английский

Citations

0
Development of high-performance cobalt oxide electrocatalysts for alkaline water splitting via integrated pulsed laser ablation in liquid (PLAL) and electrophoretic deposition (EPD) DOI
Huan Wang, Hong Seok Kim

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 132, P. 102 - 115

Published: April 30, 2025

Language: Английский

Citations

0
Bamboo‐Like Carbon Nanotube‐Encapsulated Fe2C Nanoparticles Activate Confined Fe2O3 Nanoclusters Via d‐p‐d Orbital Coupling for Alkaline Oxygen Evolution Reaction DOI Open Access
Zilong Chen,

Wenxia Xu,

Weizhou Wang

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

The efficient anion exchange membrane water electrolysis is challenging with low cell voltage and long-term stability at large current density, due to the unstable anodic oxygen evolution reaction (OER). Fe-based electrocatalysts are potential candidates for OER. In materials, iron oxides always show better in alkaline solution but lower OER activity. However, catalysts previous study difficult continuously effectively activate supported on carbon during electrocatalysis. Herein, a new class of electrocatalyst: bamboo-like nanotubes (B-CNT)-encapsulated Fe

Language: Английский

Citations

1