Synergistic Bimetallic CoCu‐Codecorated Carbon Nanosheet Arrays as Integrated Bifunctional Cathodes for High‐Performance Rechargeable/Flexible Zinc‐Air Batteries DOI

Jiaqi Kuang,

Yirun Shen,

Yang Zhang

et al.

Small, Journal Year: 2023, Volume and Issue: 19(17)

Published: Jan. 31, 2023

The unremitting exploration of well-architectured and high-efficiency oxygen electrocatalysts is promising to speed up the surface-mediated reduction/evolution reaction (ORR/OER) kinetics rechargeable zinc-air batteries (ZABs). Herein, bimetallic CoCu-codecorated carbon nanosheet arrays (CoCu/N-CNS) are proposed as self-supported bifunctional catalysts. integrated catalysts in situ constructed via a simple sacrificial-templated strategy, imparting CoCu/N-CNS with 3D interconnected conductive pathways, abundant mesopores for electrolyte penetration ion diffusion, well Cu-synergized Co-Nx /O reactive sites improved catalytic activities. By incorporating moderate amount Cu into CoCu/N-CNS, activities can be further increased due synergistic electrocatalysis. Consequently, optimized realizes low overall overpotential 0.64 V OER ORR leads high-performance liquid ZABs high gravimetric energy (879.7 Wh kg-1 ), peak power density (104.3 mW cm-2 remarkable cyclic stability upon 400 h/1000 cycles at 10 mA . More impressively, all-solid-state flexible assembled cathode exhibit superior rate performance exceptional mechanical flexibility under arbitrary bending conditions. This monolith holds significant potential advancing cation-modulated multimetallic multifunctional nanocatalysts.

Language: Английский

Metal-organic-framework-based materials as platforms for energy applications DOI Creative Commons
Wenjuan Wang, Di Chen,

Fayan Li

et al.

Chem, Journal Year: 2023, Volume and Issue: 10(1), P. 86 - 133

Published: Oct. 10, 2023

Language: Английский

Citations

124
Supporting Trimetallic Metal‐Organic Frameworks on S/N‐Doped Carbon Macroporous Fibers for Highly Efficient Electrocatalytic Oxygen Evolution DOI
Yafei Zhao, Xue Feng Lu, Zhi‐Peng Wu

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(19)

Published: March 15, 2023

Hybrid materials, integrating the merits of individual components, are ideal structures for efficient oxygen evolution reaction (OER). However, rational construction hybrid with decent physical/electrochemical properties is yet challenging. Herein, a promising OER electrocatalyst composed trimetallic metal-organic frameworks supported over S/N-doped carbon macroporous fibers (S/N-CMF@Fex Coy Ni1-x-y -MOF) via cation-exchange strategy delicately fabricated. Benefiting from composition improved intrinsic activity, hollow S/N-CMF matrix facilitating exposure active sites, as well their robust integration, resultant S/N-CMF@Fex -MOF delivers outstanding activity and stability alkaline OER. Specifically, it needs an overpotential 296 mV to reach benchmark current density 10 mA cm-2 small Tafel slope 53.5 dec-1 . In combination X-ray absorption fine structure spectroscopy functional theory calculations, post-formed Fe/Co-doped γ-NiOOH during operation revealed account high performance -MOF.

Language: Английский

Citations

108
High-performance seawater oxidation by a homogeneous multimetallic layered double hydroxide electrocatalyst DOI Creative Commons
Luo Yu, Jiayong Xiao, Chuqiang Huang

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2022, Volume and Issue: 119(18)

Published: April 27, 2022

SignificanceSeawater is one of the most abundant resources on Earth. Direct electrolysis seawater a transformative technology for sustainable hydrogen production without causing freshwater scarcity. However, this severely impeded by lack robust and active oxygen evolution reaction (OER) electrocatalysts. Here, we report highly efficient OER electrocatalyst composed multimetallic layered double hydroxides, which affords superior catalytic performance long-term durability high-performance electrolysis. To best our knowledge, catalyst among it advances development technology.

Language: Английский

Citations

104
Realizing electrochemical transformation of a metal–organic framework precatalyst into a metal hydroxide–oxy(hydroxide) active catalyst during alkaline water oxidation DOI
Baghendra Singh, Abhimanyu Yadav, Arindam Indra

et al.

Journal of Materials Chemistry A, Journal Year: 2022, Volume and Issue: 10(8), P. 3843 - 3868

Published: Jan. 1, 2022

The electrochemical transformation of a MOF precatalyst into metal hydroxide–(oxy)hydroxide active catalyst.

Language: Английский

Citations

83
Creating Dual Active Sites in Conductive Metal‐Organic Frameworks for Efficient Water Splitting DOI
Yuqian He, Feng Yan, Xiao Zhang

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(20)

Published: April 7, 2023

Abstract The achievement of bifunctional metal‐organic frameworks (MOFs) remains a huge challenge due to their lack dual active sites. Herein, sites in the Co‐catecholate (Co‐CAT) are created through Ru, Ir, or Rh doping for overall water splitting. Among them, RuCo‐CAT exhibits excellent activities, outperforming benchmarked Pt/C hydrogen evolution reaction (HER) and RuO 2 oxygen (OER). theoretical calculations demonstrate that doped Ru atoms with optimal absorption energy intermediate Co centers reduced barrier rate‐determining step HER OER, respectively. Furthermore, incorporation can improve electrical conductivity capacity adsorption Co‐CAT greatly, synergistically improving activity. This strategy engineering offers novel insights into designing MOFs

Language: Английский

Citations

76
Bimetal‐Organic Framework Nanoboxes Enable Accelerated Redox Kinetics and Polysulfide Trapping for Lithium‐Sulfur Batteries DOI
Zhuo Zhu, Yinxiang Zeng, Zhihao Pei

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(31)

Published: June 7, 2023

Abstract Lithium‐sulfur (Li−S) batteries are considered as promising candidates for next‐generation energy storage systems in view of the high theoretical density and low cost sulfur resources. The suppression polysulfide diffusion promotion redox kinetics main challenges Li−S batteries. Herein, we design prepare a novel type ZnCo‐based bimetallic metal–organic framework nanoboxes (ZnCo‐MOF NBs) to serve functional host hollow architecture ZnCo‐MOF NBs can ensure fast charge transfer, improved utilization, effective confinement lithium polysulfides (LiPSs). atomically dispersed Co−O 4 sites firmly capture LiPSs electrocatalytically accelerate their conversion kinetics. Benefiting from multiple structural advantages, ZnCo‐MOF/S cathode shows reversible capacity, impressive rate capability, prolonged cycling performance 300 cycles.

Language: Английский

Citations

75
Crystalline-amorphous heterostructures with assortative strong-weak adsorption pairs enable extremely high water oxidation capability toward multi-scenario water electrolysis DOI
Jiawei Zhu, Ruihu Lu, Fanjie Xia

et al.

Nano Energy, Journal Year: 2023, Volume and Issue: 110, P. 108349 - 108349

Published: March 15, 2023

Language: Английский

Citations

66
Electro-oxidation reconstitution of aluminium copper MOF-derived metal oxyhydroxides for a robust OER process DOI Creative Commons
Huda A. Alburaih, Sumaira Manzoor,

Muhammad Abdullah

et al.

RSC Advances, Journal Year: 2023, Volume and Issue: 13(13), P. 8736 - 8742

Published: Jan. 1, 2023

It is common knowledge that the O2 evolution reaction (OER) a crucial half-reaction in electrolysis of water. However, it currently difficult to create inexpensive OER electrode materials way efficient, simple, and environmentally friendly. In this research, metal oxy-hydroxides with numerous oxygen defects (M-OOHv) are created at surface Cu foam (CF) using unique, straightforward electro-oxidation reconstitution (ER) process. Different spectroscopic microscopy methods used analyse characteristics Al2Cu-MOF@M-OOHv-ER/CF; electrochemical measurements display lower overpotential (η) 366 mV @ 10 mA cm-2 Tafel slope 95.2 dec-1 1.0 M KOH. X-Ray diffraction (XRD), scanning electron (SEM), Raman studies confirm phase transition metal-organic framework (MOF) M-OOH, which acts as active site boost activity. Through microscopic investigations, determined efficiency bimetallic vacancies M-OOHv have an impact on power density. The manufactured material additionally showed good durability for 50 hours. As result, newly developed Al2Cu-MOF@M-OOHv-ER/CF nanomaterial has greater potential both water other energy storage equipment.

Language: Английский

Citations

60
Active Site Tailoring of Metal‐Organic Frameworks for Highly Efficient Oxygen Evolution DOI
Feng Hu, Deshuang Yu, Wen‐Jing Zeng

et al.

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(29)

Published: June 17, 2023

Abstract The direct correlation between active sites and catalytic activity in multiple‐component metal‐organic frameworks (MOFs) is key to understanding their mechanism of oxygen evolution reaction (OER) but remains vague. Herein, supported multiple‐site MOFs are adopted as model catalysts quantitatively study the composition‐dependent OER performance. Ni on Fe metal substrate possess highest intrinsic with Ni/Fe ratio 1:2 presence leaching during synthesis. Further introducing a proper amount Cu further boosts performance Cu‐doped NiFe an impressively low overpotential 200 mV at 10 mA cm −2 . Spectroscopic analysis theoretical indicates that copper doping within induces electron redistribution for high valence optimized balance OH/OOH adsorption decreased energy barrier improved OER. This work sheds light site tailoring which highly correlates activity.

Language: Английский

Citations

44
Single-atom platinum with asymmetric coordination environment on fully conjugated covalent organic framework for efficient electrocatalysis DOI Creative Commons
Ziqi Zhang, Zhe Zhang, Cailing Chen

et al.

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

Published: March 22, 2024

Abstract Two-dimensional (2D) covalent organic frameworks (COFs) and their derivatives have been widely applied as electrocatalysts owing to unique nanoscale pore configurations, stable periodic structures, abundant coordination sites high surface area. This work aims construct a non-thermodynamically Pt-N 2 active site by electrochemically modifying platinum (Pt) single atoms into fully conjugated 2D COF conductive agent-free pyrolysis-free electrocatalyst for the hydrogen evolution reaction (HER). In addition maximizing atomic utilization, single-atom catalysts with definite structures can be used investigate catalytic mechanisms structure-activity relationships. this work, in-situ characterizations theoretical calculations reveal that nitrogen-rich graphene analogue not only exhibits favorable metal-support effect Pt, adjusting binding energy between Pt H* intermediates forming instead of typical 4 environment, but also enhances electron transport ability structural stability, showing both conductivity stability in acidic environments.

Language: Английский

Citations

44