Construction of Ni2p@Nico-Bldh Nanocomposite with Hierarchical Porous Structure on Nickel Foam as Advanced Oxygen Evolution Electrocatalyst DOI
Zhihong Liu, Dan Liú, Tianqi Gao

et al.

Published: Jan. 1, 2023

ABSTRACT Fabrication of hierarchical porous structure two-dimensional layered double hydroxides (LDHs) materials still faces high challenges, especially the precise modulations lamellar metals and interlayer anions. Herein, in order to overcome slow kinetics water oxidation reaction which requires efficient electrocatalysts for oxygen evolution (OER), a nanocomposite assembled by foam nickel (NF) supported borate anions incorporated bimetallic NiCo hydrotalcite (NiCo-BLDH) on surface phosphide sheets (NF/Ni2P@NiCo-BLDH) is prepared as an electrocatalyst through NF in-situ phosphating electrodeposition approach. Experimental investigations indicate that introducing multi-phase into transition metal LDHs can regulate their properties, enhance adsorption efficiency OH-, thereby enhancing OER activity. Remarkably, NF/Ni2P@NiCo-BLDH electrode shows low overpotential 293 mV at 100 mA cm−2 Tafel slope 108.3 dec−1 1.0 M KOH medium, smaller than most previously reported NiCo-based catalysts. However, NF/Ni2P exhibits more hydrogen medium compared electrode. This work may push forward catalytic activity NiCo-LDH-based provide new idea large-scale electrocatalytic splitting.

Language: Английский

Engineering CoN4 and FeN4 Dual Sites with Adjacent Nanoclusters on Flexible Porous Carbon Fibers for Enhanced Electrocatalytic Oxygen Reduction and Evolution DOI
Zhe Lü, Zhe Wang, Zhenbei Yang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

Abstract Dual‐atom catalysts (DACs) possess tunable electronic structures and efficient atom utilization, making them highly promising for catalyzing the oxygen reduction reaction/oxygen evolution reaction (ORR/OER). However, achieving high catalytic activity stability both ORR OER in DACs remains a challenge. Herein, flexible membrane of porous carbon fiber anchored with atomically scattered CoN 4 /FeN dual sites adjacent Co 2 Fe /Fe 5 nanoclusters (Co, Fe‐DACs/NCs@PCF) is synthesized. The local geometry structure sites, which act as centers ORR/OER, are finely regulated by neighboring nanoclusters. This unique imparts Co, Fe‐DACs/NCs@PCF exceptional durability toward outperforming performance single‐atom containing only or FeN well commercial Pt/C RuO catalysts. Zinc–air battery employing cathode exhibits outstanding stability, maintaining cyclability over 1500 h, + air cathode. Theoretical calculations highlight distinct synergies between (Co ) clusters (CoN optimize coupling strength Fe(Co)─OH at potential‐determining steps thus improve (OER) kinetics. study lays theoretical practical foundation rational design heterostructure featuring coexisting within fibers.

Language: Английский

Citations

1
Enabling efficient ample-level oxygen evolution on nickel-iron Prussian blue analogue/hydroxide via hierarchical mass transfer channel construction DOI
Shixin Sun, Yinghua Guo, Guodong Xu

et al.

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 659, P. 40 - 47

Published: Dec. 24, 2023

Language: Английский

Citations

3
Preparation of Hollow Cofe Prussian Blue Analogs and Their Derived Cop-Fep Nanoboxes as Efficient Electrocatalysts as Oxygen Evolution Reactions DOI
Shiqi Zhang, Ying Cheng, Zhiyuan Ni

et al.

Published: Jan. 1, 2024

Language: Английский

Citations

0
Facile synthesis of molybdenum carbide interspersed in biomass-derived N-doped carbon matrix for efficient hydrogen evolution reaction DOI

Shuang Jiang,

Jinfeng Zhang,

Ziqiang Xie

et al.

Journal of Applied Electrochemistry, Journal Year: 2024, Volume and Issue: unknown

Published: July 14, 2024

Language: Английский

Citations

0
Construction of Ni2p@Nico-Bldh Nanocomposite with Hierarchical Porous Structure on Nickel Foam as Advanced Oxygen Evolution Electrocatalyst DOI
Zhihong Liu, Dan Liú, Tianqi Gao

et al.

Published: Jan. 1, 2023

ABSTRACT Fabrication of hierarchical porous structure two-dimensional layered double hydroxides (LDHs) materials still faces high challenges, especially the precise modulations lamellar metals and interlayer anions. Herein, in order to overcome slow kinetics water oxidation reaction which requires efficient electrocatalysts for oxygen evolution (OER), a nanocomposite assembled by foam nickel (NF) supported borate anions incorporated bimetallic NiCo hydrotalcite (NiCo-BLDH) on surface phosphide sheets (NF/Ni2P@NiCo-BLDH) is prepared as an electrocatalyst through NF in-situ phosphating electrodeposition approach. Experimental investigations indicate that introducing multi-phase into transition metal LDHs can regulate their properties, enhance adsorption efficiency OH-, thereby enhancing OER activity. Remarkably, NF/Ni2P@NiCo-BLDH electrode shows low overpotential 293 mV at 100 mA cm−2 Tafel slope 108.3 dec−1 1.0 M KOH medium, smaller than most previously reported NiCo-based catalysts. However, NF/Ni2P exhibits more hydrogen medium compared electrode. This work may push forward catalytic activity NiCo-LDH-based provide new idea large-scale electrocatalytic splitting.

Language: Английский

Citations

0