Nanoscale
·
2024
·Vol. 16
·期 23
·11250-11261
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IF 5.8
Tingxia Wang,Xu Zhang,Xiaojiao Yu,Yun Liu,Junpeng Li,Zongbin Liu,Ningning Zhao,Jian Zhang,Jinfen Niu,Qingliang Feng
High-efficiency water electrolysis over a broad pH range is desirable but challenging. Herein, Ru-decorated VS2 on carbon cloth (Ru–VS2/CC) has been in situ synthesized, which features the regulated electronic structure of VS2 by introducing Ru. It is remarkable that the optimal Ru–VS2/CC displays excellent electrocatalytic hydrogen evolution activity with overpotentials of 89 and 87 mV at −10 mA cm−2 in 0.5 M H2SO4 and 1.0 M KOH, respectively. Theoretical calculations and electrocatalytic measurements have demonstrated that introducing Ru induces an enhanced charge density around the Fermi level, facilitating charge transfer and speeding up the electrocatalytic HER kinetics. The Gibbs free energy of the hydrogen intermediate (ΔGH*) of Ru–VS2/CC (0.23 eV) is much closer to zero than that of pure VS2 (0.51 eV) and Ru (−0.37 eV), demonstrating an easier hydrogen adsorption and desorption process for Ru–VS2/CC. The more favorable ΔGH*, differential charge density and the d-band center endow Ru–VS2 with enhanced intrinsic electrocatalytic activity. This study presents a feasible strategy for enhancing electrocatalytic HER activity by the regulation of the electronic structure and the rational integration of dual active components.
研究领域:
材料科学
·
电催化
·
理论计算
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 35
·期 5
·2406931
·
IF 18.5
Shuaixing Li,Luhao Liu,Xiansheng Dong,Ke Xu,Jiachen Tang,Yuan Li,Yuefeng Nie,Yufeng Hao,Yi Shi,Songlin Li
The concepts of quantum interference and charge localization have profoundly influenced the understanding of electronic conductivity in materials. While magnetoresistance behavior with monotonic or singly transitional dependence on applied magnetic fields is widely observed in different materials, it remains scarce to find one that features multiple transitions in magnetoresistance. Here, the effects of dimensional crossover on electronic and magneto-transport behavior in vanadium disulfide (VS 2 ) are reported. Dual transitions in magnetoresistance are observed in 5 nm VS 2 nanosheets, resulting from the competition of multiple mechanisms relevant to charge transport as the external magnetic field changes. The nontrivial magneto-transport phenomenon revealed in the system is attributed to the effect of strong electron correlation and the delicate interplay among spin, orbital, and structural degrees of freedom. These appealing physical properties make 2D VS 2 a promising platform for exploring exotic electronic phenomena.
研究领域:
凝聚态物理
·
材料科学
✓ 已验证
DOI
高影响因子
IONICS
·
2019
·Vol. 26
·期 2
·777-787
·
IF 2.289
Jing Pengcheng,Lu Huimin,Yang Wenwen,Cao Yuan,Xu Binbin,Cai Wei,Deng Yan
Magnesium batteries based on Mg 2+ /Li + dual ion electrolytes (MLIBs) have attracted increasing attention due to fast Li + or Mg 2+ /Li + insertion kinetics, abundant Mg resources, and high volumetric capacity of dendrite-free Mg anodes. Herein, we report polyaniline (PANI)–coated VS 4 @reduced graphene oxide (rGO) with nanostructures synthesized via hydrothermal synthesis and subsequent PANI polymerization as the cathode material for MLIBs. The PANI layer serves as a conductive medium to enhance electron transfer and Mg 2+ /Li + transportation as well as to mitigate the structure changes of VS 4 during the cycling process. Indeed, this material demonstrates enhanced electrochemical performance with a high discharge capacity of 200.7 mAh g −1 after 20 cycles and 91.2% retention after 50 cycles. Mechanism analysis reveals that Li + insertion into VS 4 produced an amorphous VS 4 host in the first discharge, which inclined to store Mg 2+ rather than Li + in the subsequent cycles. Our study provides new insights into the development of amorphous electrode materials for magnesium batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Jinling Zhang,Mengxiang Shang,Yao Gao,Jianyue Yan,Wenbo Song
High visible-light active materials with boosted photoelectric conversion efficiency are the key to fabricate high-performance photoelectrochemical (PEC) sensor. Herein, we report in-situ formation of VS 2 QDs-Bi 2 S 3 heterostructure for promising application in constructing PEC aptasensor. Dramatically enhanced photoelectric conversion capacity is verified by photoluminescence spectroscopy (PL), electrochemical impedance spectroscopy (EIS) and PEC measurements. The intrinsic metallic feature of VS 2 , efficient visible light absorption of Bi 2 S 3 nanotube, and well-aliened band structure between them are responsible to substantially enhanced photocurrent. By covalently linking 5′-NH 2 -terminated lysozyme (Lys) aptamer on the VS 2 QDs-Bi 2 S 3 heterostructure, a self-powered PEC aptasensor for Lys is constructed. Under optimal conditions, ultrasensitive and selective detection of Lys is established in a wide linear range of 3.5 pM-70 nM with good selectivity and stability. The detection limit is 1.1 pM. Trace monitoring Lys in biological systems is realized with desired accuracy and satisfactory recovery. This work illustrates the prospect of VS 2 QDs-based heterostructure for PEC sensing and possible photocatalytic applications.
研究领域:
生物传感
·
材料科学
·
分析化学
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Mengmeng Shao,Yangfan Shao,Shengjie Ding,Jingwei Wang,Jinchen Xu,Yuanju Qu,Xiongwei Zhong,Xinman Chen,Weng Fai Ip,Ning Wang,Baomin Xu,Xingqiang Shi,Xuesen Wang,Hui Pan
Highly efficient, earth-abundant, and low-cost photocatalysts are widely pursued for solar-driven hydrogen generation from water. Herein, we first report vanadium disulfide (VS 2 ) with high hydrogen evolution reaction (HER) activity both in basal and edges to be the co-catalyst of graphitic carbon nitride (g-C 3 N 4 ) for ultrahigh solar-driven hydrogen production . VS 2 -decorated g-C 3 N 4 shows an impressing photocatalytic hydrogen evolution with a rate of 87.4 μmol/h, 26 times higher than pristine g-C 3 N 4 . Our combined experimental and computational studies reveal that the excellent efficiency of the composite is attributed to: (1) effective electron-hole separation and electron transfer from g-C 3 N 4 to VS 2 , resulting from the optimal band alignment between VS 2 and g-C 3 N 4 and metallic characteristic of VS 2 ; (2) fast hydrogen generation on the surface due to the high surface area and excellent HER activity of VS 2 . Our findings demonstrate that VS 2 /g-C 3 N 4 may be applicable in solar-driven water splitting, and the design principle can be applied to search for novel photocatalysts.
研究领域:
材料科学
·
可再生能源
·
化学工程
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产品关联
DOI
高影响因子
ChemSusChem
·
2017
·Vol. 11
·期 4
·709-715
·
IF 7.226
Xuefeng Zhang,Shuai Wang,Jiguo Tu,Guohua Zhang,Shijie Li,Donghua Tian,Shuqiang Jiao
A flower-like vanadium sulfide/reduced graphene oxide (VS 4 /rGO) composite was prepared by a typical hydrothermal method and it was investigated as cathode for aluminum-ion batteries with non-inflammable and non-explosive ionic-liquid electrolytes. The charge/discharge performance measurements were performed in a voltage range of 0.1–2.0 V versus Al/AlCl 4 − , which gave an initial charge/discharge specific capacity af approximately 491.57 and 406.94 mA h g −1 , respectively, at a current density of 100 mA g −1 . Additionally, in the cycling performance, the discharge capacity was observed to remain over 80, 70, and 60 mA h g −1 at current densities of 100, 200, and 300 mA g −1 after 100 cycles, respectively. The result of a coulombic efficiency over 90 % after 100 cycles and high retained capacity indicate that the composite is a favorable cathode material for new rechargeable aluminum-ion batteries. Graphical Flower power : A flower-like vanadium sulfide/reduced graphene oxide (VS 4 /rGO) composite is prepared by a typical hydrothermal method and investigated as cathode for aluminum-ion batteries with non-inflammable and non-explosive ionic-liquid electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jinglian Zhu,Xu Zhang,Haiguang Gao,Yuting Shao,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li
Rechargeable magnesium batteries (rMBs) are promising techniques suitable for large-scale energy storage systems with low-cost and high safety. However, their development is severely hindered by strong coulombic effect between bivalent Mg 2+ and cathode materials . In this work, two dimensional hierarchical nano-micro hybrids are synthesized by in-situ generating VS 4 nanosheets on carbon-coated Ti 3 C 2 MXene matrix (denoted as VS 4 @Ti 3 C 2 /C). A high-performance rMB system is built by using the hierarchical nano-micro hybrids cathode, magnesium foil anode, and 0.25 M methylpyrrolidinium chloride in 0.25 M 2PhMgCl-AlCl 3 /tetrahydrofuran as the electrolyte. The existence of V–C bond proves that VS 4 is anchored on the surface of Ti 3 C 2 via a strong chemical bond, rather than simply by adsorption. The unique hierarchical nano-micro structure improves the accessibility of the electrolyte and reduces the charge transfer resistance, leading to a high discharge capacity of 492 mA h g −1 at 50 mA g −1 , an outstanding rate performance of 129 mA h g −1 at 1000 mA g −1 , and excellent cycling performance (over 900 cycles at 500 mA g −1 ). Moreover, reversible intercalation of MgCl + into VS 4 @Ti 3 C 2 /C is revealed by investigating the evolution of the hybrids during different electrochemical states. This study will shed light on designing high-performance MXene-based cathode materials for multivalent batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
多价离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Dexi Liu,Shichang Xu,Yanmeng Cai,Yue Wang,Jiaqi Guo,Youlin Li
The conventional separation technologies, like chemical precipitation and adsorption processes, cannot quickly and selectively separate and recycle heavy metal ions from waste. Due to its rich sulfur content and excellent electrical conductivity, vanadium disulfide is a potential material for effectively removing lead from wastewater. The vanadium disulfide material with selective adsorption ability was introduced into CDI technology to construct a coupling technology with both advantages. The N -doped modified ZIF@vanadium disulfide (ZAC@VS 2 ) composites were successfully synthesized by hydrothermal method. Electrosorption experiments show that ZAC@VS 2 material presents the remarkable saturated adsorption capacity to lead(II) ions (239.52 mg/g) in the 500 mg/L PbCl 2 solution. In the triplex blend system (Fe 3+ /Pb 2+ /Na + ) with each solute density of 100 mg/L, the saturated adsorption efficiency of 85.4% to Pb 2+ can still be maintained. In addition, compared with the Langmuir(R 2 =0.873) adsorption isotherm model, the Freundlich model (R 2 =0.922) can be better used to fit the adsorption process, which proves that the adsorption process is multilayered and heterogeneous. XPS tests and competitive adsorption experiments show that the electric double layer (EDL) and complexation together promote the selective adsorption of heavy metal ions by ZAC@VS 2 . ZAC@VS 2 composite electrode shows excellent performance in the removal of lead ions in battery waste liquid, indicating the potential of introducing ZAC@VS 2 into CDI to remove lead ions.
研究领域:
环境科学
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材料科学
·
水处理技术
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重金属污染控制
·
电化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Muhammad Kashif Naseem,Mian Azmat,Changliang Du,Muhammad Ismail,Hajra Baig,Rong Jiang,Asif Ali,Meishuai Zou,Youqi Zhu,Chuanbao Cao
Vanadium tetrasulfide (VS4) is one of the most promising cathodic materials for rechargeable magnesium battery systems (RMBSs). Elemental substitution to expand layers, creation of sulfur vacancies, and reduction of particle sizes of VS4 are undoubtedly effective strategies to enhance cathodic performances. Experimental and DFT analysis revealed that valence states of vanadium and cobalt have been elevated from V2+ to V3+ and Co2+ to Co3+ in VS4 and that the Co–S bond length shortened due to cobalt substitution, which resulted in enhanced overall internal polarization in the layered atomic structure of VS4 by increasing cobalt concentrations. This phenomenon of charge accumulation contributes toward regulated magnesiation and accommodated volume expansion while cycling, resulting in the enormous structural stability of VS4 and sustainable battery performance during a long and stable cycling at a cost of 20% capacity diminution as compared to pristine VS4 in RMBS. Hence, 9% CoVS4 demonstrated a capacity of 158 mAh g–1 at a current density of 500 mA g–1 with approximately 98% capacity retention after 1000 cycles. Sustainable cathodic performance is the most desirous feature for commercialization. This work provides insight realization regarding structural limitations and opportunities of VS4 for sustainable cathodic performances in RMBS with non-nucleophilic 0.25 mol/L (R-PhOMgCI)2-A1Cl3/THF (PMC) electrolyte and has laid a theoretical plus experimental foundation for future developments.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Battery Energy
·
2024
·
IF 9
Lu Wang,Hao Dang,Tianqi He,Rui Liu,Rui Wang,Fen Ran
As a typical representative of vanadium-based sulfides, vanadium disulfide has attracted the attention of researchers ascribed to its high theoretical capacity and unique crystal structure. However, overcoming its structural collapse while achieving dual functionalization that serves as both active material and binder remains challenging. This study designs a dopamine-coating vanadium disulfide core-shell structure through the synergistic effect of V-O bonds and hydrogen bonds between vanadium disulfide and dopamine, which is further employed as a dual-function electrode material. The polydopamine-coated vanadium disulfide without binder exhibits specific capacity of 682.03 mAh g −1 , and the Coulombic efficiency of 99.78% at a current density of 200 mA g −1 after 400 cycles. More importantly, at a larger current density of 1000 mA g −1 , the specific capacity is 385.44 mAh g −1 after 1500 cycles. After 3150 cycles, the specific capacity is 200.32 mAh g −1 at 2000 mA g −1 . Electrochemical kinetics analysis displays that the polydopamine-coated vanadium disulfide without binder exhibits fast ion-diffusion kinetics, with the order of magnitude of ion-diffusion coefficients ranging from 10 −11 to 10 −12 . This kind of material has the potential to be a significantly promising electrode material for “fast-charging” lithium-ion batteries. Highlights A polydopamine-coated vanadium disulfide (VS 2 @PDA) core-shell structure is designed through the combined action of hydrogen bonding and covalent bonding. The VS 2 @PDA acts as a binder, which not only stabilizes the structure but also successfully buffers the volume effect of vanadium disulfide. Compared with vanadium disulfide, polydopamine units store more lithium ions, which is more conducive to Li + storage. The VS 2 @PDAN demonstrated excellent electrochemical performance (a specific capacity of 385.44 mAh g −1 at 1000 mA g −1 for 1500 cycles).
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jingwei Wang,Yaoyong Dong,Xuejun Zheng,Bei long,Hui Ling,Long Xie,Zhenhua Xiang,Wenyuan He
This report reveals that the hydrogen evolution activity of VS 2 can be effectively strengthened by inducing the surface charge redistribution of VS 2 via P non-metal doping. The XRD, TEM, GPA, EDS and XPS characterizations confirm that the P atoms are successfully doped into the VS 2 /CC matrix by substituting S atoms, resulting in lattice tensile strain and charge redistribution. The optimal P-doped VS 2 on carbon cloth (P-VS 2 /CC) exhibits a low overpotential of 274 mV at − 50 mA cm −2 and a small Tafel slope of 65.4 mV dec -1 , much lower than those of VS 2 /CC counterpart (622 mV and 120.1 mV dec −1 , respectively). Moreover, the P-VS 2 /CC delivers a long-term stability for 55 h without decay at 10 mA cm −2 , outperforming the VS 2 /CC. Density functional theory calculations suggest that P doping can induce the charge transfer from S and V to nearby P atoms, resulting in the decrease of hydrogen adsorption free energy at the S and V sites and the increase of total density of states at the Fermi level, thus far super hydrogen evolution activity. This work provides a hopeful new route for strengthening the HER activity of VS 2 , and offers a new perspective for developing advanced transition-metal chalcogenides electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Liang Wu,Xingwu Zhai,Hang Wang,Hui Zhang,Zhongda Chen,Zhixin Sun,Min Zhou
An interlayer-expanded vanadium disulfide (VS 2 ) electrode has been developed to enhance the performance of sodium ion batteries. The interlayer expansion of the (0 0 1) plane from the standard 5.7 Å to 9.5 Å improves capacity by 2–3 times at various current densities even over long cycles. This advancement is credited to the optimized kinetics of Na + diffusion, as the intrinsic structure of VS 2 with weak van der Waals interlayer interactions leads to minimal resistance along 2D ionic diffusion routes. Our findings highlight the significance of interlayer engineering in designing efficient energy storage electrodes.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）