Hollow Stair-Stepping Spherical High-Entropy Prussian Blue Analogue for High-Rate Sodium Ion Batteries DOI
Yifan Zhang, Jiajia Huang,

Linyang Qiu

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(21), P. 27684 - 27693

Published: May 16, 2024

Prussian blue analogues (PBAs) are considered to be one of the most suitable sodium storage materials, especially with introduction high-entropy (HE) concept into their structure further improve various abilities. However, severe agglomeration HEPBA particles still limits fast charging capabilities. Here, an (Nax(FeMnCoNiCu)[Fe(CN)6]y□1–y·nH2O) a hollow stair-stepping spherical has been prepared through chemical etching process traditional cubic HEPBA. Electrochemical characterization (sodium ion battery), kinetic analysis, and COMSOL Multiphysics simulations reveal that nature can greatly diffusion behavior Na+ ions. Moreover, effectively mitigates volume change during SIBs operation, ultimately extending lifespan. Consequently, as-prepared cathode exhibits excellent rate performance (126.5 76.4 mAh g–1 at 0.1 4.0 A g–1, respectively) stable long-term capability (maintaining its 75.6% capacity after 1000 cycles) due unique structure. Furthermore, waste easily recycled prepare more product. This processing method holds great promise for designing nanostructures advanced batteries.

Language: Английский

Enhanced Active Sites and Stability in Nano‐MOFs for Electrochemical Energy Storage through Dual Regulation by Tannic Acid DOI Open Access
Yibo Lu, Guangxun Zhang, Huijie Zhou

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(41)

Published: Aug. 21, 2023

The limited active sites and poor acid-alkaline solution stability of metal-organic frameworks (MOFs), significantly limit their wider application. In this study, the acid property tannic (TA) was used as an etchant to etch surface-active sites. Subsequently, further chelation protonated TA with exposed metal site can effectively protect ions. Meanwhile, provided a large amount phenolic hydroxyl groups, which greatly improve imidazolate-coordinated MOFs. electrochemical test results indicated that MOFs composite materials synthesized using scheme had high specific capacitance stability. And mechanism its reaction process explored through in situ X-ray diffraction (XRD) theoretical calculations. addition, same treatment carried out series carboxyl-coordinated MOFs, confirmed principle obtain higher This paper explains functionalization nano-MOFs by polyphenolic compounds, providing new ideas for research nano-MOFs.

Language: Английский

Citations

72
Doped MXenes—A new paradigm in 2D systems: Synthesis, properties and applications DOI Creative Commons
Avishek Dey, Silvia Varagnolo, Nicholas P. Power

et al.

Progress in Materials Science, Journal Year: 2023, Volume and Issue: 139, P. 101166 - 101166

Published: July 22, 2023

Since 2011, 2D transition metal carbides, carbonitrides and nitrides known as MXenes have gained huge attention due to their attractive chemical electronic properties. The diverse functionalities of make them a promising candidate for multitude applications. Recently, doping MXene with metallic non-metallic elements has emerged an exciting new approach endow properties this systems, opening paradigm theoretical experimental studies. In review, we present comprehensive overview on the recent progress in emerging field doped MXenes. We compare different strategies; techniques used characterization discuss enhanced distinct advantages applications such electrocatalysis, energy storage, photovoltaics, electronics, photonics, environmental remediation, sensors, biomedical is elaborated. Additionally, developments photovoltaics electronics are explored provide prospect into specific along underlying mechanisms. Lastly, challenges take forward thriving field.

Language: Английский

Citations

48
Recent advances in metal-organic framework (MOF)-based agricultural sensors for metal ions: a review DOI
Xinyu Lu, Kumarasamy Jayakumar, Yangping Wen

et al.

Microchimica Acta, Journal Year: 2023, Volume and Issue: 191(1)

Published: Dec. 28, 2023

Language: Английский

Citations

42
Dynamic Phase Transformations of Prussian Blue Analogue Crystals in Hydrotherms DOI
Guangxun Zhang,

Yibo Lu,

Ya Yang

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(24), P. 16659 - 16669

Published: June 7, 2024

Prussian blue analogue (PBA)/metal–organic frameworks (MOFs) are multifunctional precursors for the synthesis of metal/metal compounds, carbon, and their derived composites (P/MDCs) in chemical, medical, energy, other applications. P/MDCs combine advantages both high specific surface area PBA/MOF electronic conductivity metal compound/carbon. Although calcination under different atmospheres has been extensively studied, transformation mechanism hydrothermal conditions remains unclear. The qualitative preparation a challenge. Here, we select PBA to construct machine-learning model measure its phase diagram. architecture–activity relationship substances among nine parameters was analyzed PBA. Excitingly, established universal accurately fabricate 31 derivates. Additionally, performed three-dimensional reconstructed transmission electron microscopy, X-ray absorption fine structure spectroscopy, ultraviolet photoelectron situ powder diffraction, theoretical calculation analyze derivatives oxygen evolution reaction clarify mechanisms. We uncover unified principles PBA, expect guide design wide range composites.

Language: Английский

Citations

25
Tuning the local coordination environment of single-atom catalysts for enhanced electrocatalytic activity DOI

Wenhao Feng,

Chunli Liu, Guangxun Zhang

et al.

EnergyChem, Journal Year: 2024, Volume and Issue: 6(2), P. 100119 - 100119

Published: Feb. 17, 2024

Language: Английский

Citations

24
Kinetic-Thermodynamic Promotion Engineering toward High-Density Hierarchical and Zn-Doping Activity-Enhancing ZnNiO@CF for High-Capacity Desalination DOI Creative Commons
Jie Ma, Siyang Xing, Yabo Wang

et al.

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: March 4, 2024

Despite the promising potential of transition metal oxides (TMOs) as capacitive deionization (CDI) electrodes, actual capacity TMOs electrodes for sodium storage is significantly lower than theoretical capacity, posing a major obstacle. Herein, we prepared kinetically favorable Zn

Language: Английский

Citations

24
Entropy Engineering Constrain Phase Transitions Enable Ultralong‐life Prussian Blue Analogs Cathodes DOI Creative Commons
Yuhao Lei, Shiyong Wang,

Lin Zhao

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(28)

Published: April 26, 2024

Abstract Prussian blue analogs (PBAs) are considered as one of the most potential electrode materials in capacitive deionization (CDI) due to their unique 3D framework structure. However, practical applications suffer from low desalination capacity and poor cyclic stability. Here, an entropy engineering strategy is proposed that incorporates high‐entropy (HE) concept into PBAs address unfavorable multistage phase transitions during CDI desalination. By introducing five or more metals, which share N coordination site, hexacyanoferrate (HE‐HCF) constructed, thereby increasing configurational system above 1.5R placing it category. As a result, developed HE‐HCF demonstrates remarkable cycling performance, with retention rate over 97% after undergoing 350 ultralong‐life cycles adsorption/desorption. Additionally, exhibits high 77.24 mg g −1 at 1.2 V. Structural characterization theoretical calculation reveal not only helps restrain transition strengthen structural stability, but also optimizes Na + ions diffusion path energy barrier, accelerates reaction kinetics thus improves performance. This research introduces new approach for designing electrodes cost, long‐lasting durability applications.

Language: Английский

Citations

22
Bimetallic NiCo Metal–Organic Frameworks with High Stability and Performance Toward Electrocatalytic Oxidation of Urea in Seawater DOI

Soheila Sanati,

Reza Abazari, Alexander M. Kirillov

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(34), P. 15813 - 15820

Published: Aug. 14, 2024

The urea oxidation reaction (UOR) is an alternative anodic for hydrogen generation via water splitting. significance of UOR lies in both H2 production and the decontamination urea-containing wastewater. Commercial electrocatalysts this field are generally based on noble metals show several limitations. Bimetal–organic frameworks (BMOFs) can be excellent candidates replacement noble-metal-based catalysts beacuse their promising features, such as a tunable structure, high surface area, abundant sites electrocatalysis. In study, series nickel–cobalt BMOFs (Nix-Coy-BMOFs: x y refer to molar fraction Ni Co) were synthesized applied UOR. particular, Ni0.15Co0.85-MOF material with structure similar that its parent Co-MOF, revealed exceptional electrocatalytic performance, evidenced by low values overpotential (1.33 V vs RHE at 10 mA cm–2), TOF (0.47 s–1), Tafel slope (125 mV dec–1). At 40 cm–2 current density, also showed stability during 72 h tests. This performance NiCo-BMOF assigned synergistic effect between Co Ni, active sites, porosity, all which result increased rate due acceleration charge mass transfers. Thus, present work introduces efficient noble-metal-free energy from urea-based

Language: Английский

Citations

21
Atomically dispersed Mn–Nx catalysts derived from Mn‐hexamine coordination frameworks for oxygen reduction reaction DOI Creative Commons
Guoyu Zhong,

Liuyong Zou,

Xiao Chi

et al.

Carbon Energy, Journal Year: 2024, Volume and Issue: 6(5)

Published: Jan. 10, 2024

Abstract Metal‐organic frameworks recently have been burgeoning and used as precursors to obtain various metal–nitrogen–carbon catalysts for oxygen reduction reaction (ORR). Although rarely studied, Mn–N–C is a promising catalyst ORR due its weak Fenton activity strong graphitization catalysis. Here, we developed facile strategy anchoring the atomically dispersed nitrogen‐coordinated single Mn sites on carbon nanosheets (MnNCS) from an Mn‐hexamine coordination framework. The Mn–N 4 were ultrathin with hierarchically porous structure. optimized MnNCS displayed excellent performance in half‐cells (0.89 V vs. reversible hydrogen electrode (RHE) base 0.76 RHE acid half‐wave potential) Zn–air batteries (233 mW cm −2 peak power density), along significantly enhanced stability. Density functional theory calculations further corroborated that –C 12 site has favorable adsorption of *OH rate‐determining step. These findings demonstrate metal‐hexamine framework can be model system rational design highly active atomic metal energy applications.

Language: Английский

Citations

20
Construction of fully coated polypyrrole oxygen-barrier film based on MXene nanosheets for high reliability capacitive deionization DOI
Le Zhang,

Yanmeng Cai,

Rongli Fang

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 337, P. 126362 - 126362

Published: Jan. 9, 2024

Language: Английский

Citations

18