MOLECULES
·
2024
·Vol. 29
·期 5
·951
·
IF 4.2
Tingxia Wang,Xu Zhang,Xiaojiao Yu,Junpeng Li,Kai Wang,Jinfen Niu
A bifunctional electrocatalyst with high efficiency and low costs for overall water splitting is critical to achieving a green hydrogen economy and coping with the energy crisis. However, developing robust electrocatalysts still faces huge challenges, owing to unsatisfactory electron transfer and inherent activity. Herein, NiFe LDH/NiS2/VS2heterojunctions have been designed as freestanding bifunctional electrocatalysts to split water, exhibiting enhanced electron transfer and abundant catalytic sites. The optimum NiFe LDH/NiS2/VS2electrocatalyst exhibits a small overpotential of 380 mV at 10 mA cm−2for overall water splitting and superior electrocatalytic performance in both hydrogen and oxygen evolution reactions (HER/OER). Specifically, the electrocatalyst requires overpotentials of 76 and 286 mV at 10 mA cm−2for HER and OER, respectively, in alkaline electrolytes, which originate from the synergistic interaction among the facilitated electron transfer and increasingly exposed active sites due to the modulation of interfaces and construction of heterojunctions.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Dianyu Jin,Chenxi Huang,Yue Xing,Wenzhe Fu,Wenrui Lai,Li Wang,Hualing Zeng,Kai Wu,Xiang Shao
Two-dimensional (2D) T-phase vanadium disulfide (T-VS 2 ), with its intrinsic ferromagnetism, semi-metallicity, and considerable chemical activity, holds great potential for a variety of applications in catalysis, device integration, and energy storage. However, research on the controlled growth of 2D T-VS 2 has remained limited, particularly deficient in phase control, thickness engineering, and crystallinity optimization. In this study, we systematically explore the influence of growth parameters of a chemical vapor deposition (CVD) method on the synthesis of T-VS 2 nanosheets. Specifically, we observe that properly lowering the growth temperature can facilitate the increase in sheet size, increasing the vanadium precursor concentration effectively manipulates the thickness of the T-VS 2 nanosheets, and prolonged reaction time leads to flipping of the nanosheets. What’s more, the morphology control of T-VS 2 is influenced by temperature, V source supply, and H 2 supply, leading to transitions between trapezoidal, truncated triangular, and hexagonal shapes. By carefully balancing these key parameters, a controllable growth strategy for T-VS 2 can be established. These results are drawn from the growth study on an atomically smooth SrTiO 3 (100) substrate and validated further on the Al 2 O 3 (0001) surface, which registers its scalability and generalizability and hence provides a foundation for the construction of various T-VS 2 -based nanostructures or nanodevices.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2024
·
IF 9
Xiaoming Li,Zeming Yuan,Zhenyang Li,Chenxu Liu,Tingting Zhai,Yanghuan Zhang,Tao Li
Magnesium metal and its hydride have the characteristics of high hydrogen storage capacity, which is suitable for storing hydrogen energy. In this paper, VS 2 /NC catalyst supported on nanosheet carbon was synthesized by hydrothermal method with organic matter as raw material, then the MgH 2 + x wt.% VS 2 /NC ( x = 0, 3, 6, 9) composites were prepared by ball milling with MgH 2 . The phase characterization of the composite material showed that the VS 2 and MgH 2 phases in the composite material remain stable during ball milling and subsequently, the hydrogen absorption/desorption cycle. There were V 4+ and V 2+ ions (an atomic ratio of 3.77:1) in the catalyst. At 593 K, the capacities of the composites were 5.71, 6.11, 5.62, and 5.33 wt.% H 2 , respectively. The time to reach the maximum hydrogen desorption capacity of 95% was 190, 30, 20, and 23 min, respectively. The dehydrogenation activation energy of the material with x = 6 is reduced by nearly 50 kJ/mol H 2 . The initial dehydrogenation temperature of the material decreases to 323 K. Because of the valence state transition between V ions, the band gap of the composite material is narrowed, which significantly improves the hydrogen absorption and desorption reaction kinetics.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 16
·e202200741
·
IF 9.14
Ziyuan Xiu,Ming Zheng,Jiadong Li,Feng Wei,Changchang Dong,Mingrui Zhang,Xin Zhou,Xiaojun Han
Graphical Nitrogen reduction : A bionic nitrogen fixation system composed of Fe-VS 2 nanosheets and 1-aminoanthraquinone-functionalized polymethacrylic acid (1-AAQ-PA) matrix is fabricated with 1-AAQ-PA as the electron medium to achieved high NH 3 yield rate of 31.6 μg h −1 mg −1 and faradaic efficiency to NH 3 of 23.1 % in 0.05 m Li 2 SO 4 electrolyte at −0.35 V vs. reversible hydrogen electrode. This work provides inspiration and insights for the development of effective catalyst systems for nitrogen reduction. Electrochemical N 2 fixation is considered to be a promising alternative to Haber–Bosch technology. Inspired by the composition and structure of natural nitrogenase, Fe-doped VS 2 nanosheets were prepared via one-step solvothermal method. The electron transfer system mediated by organic conductive polymer (1-AAQ-PA) was constructed to promote the electron transfer between Fe-VS 2 nanosheets and the electrode in electrocatalytic N 2 reduction reaction (NRR). The obtained 1-AAQ-PA−Fe-VS 2 electrode converted N 2 to NH 3 with a yield of 31.6 μg h −1 mg −1 at −0.35 V vs. reversible hydrogen electrode and high faradaic efficiency of 23.5 %. The introduction of Fe dopants favored N 2 adsorption and activation, while the Li−S bond between Fe-VS 2 and Li 2 SO 4 effectively inhibited hydrogen evolution. The highly efficient electron utilization in the electrocatalytic NRR process was realized using the 1-AAQ-PA as the electron transfer medium. Density functional theory calculations showed that N 2 was preferentially adsorbed on Fe and reduced to NH 3 via both distal and alternating mechanism.
研究领域:
电化学
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Wenbin Li,Jianfeng Huang,Liangliang Feng,Liyun Cao,Yijun Liu,Limin Pan
Crystallinity structure plays a key role in the rate capability and cycling performance for rechargeable battery. However, the effect of crystallinity structure on sodium storage properties of VS 2 hasn't been clearly elucidated. In this work, VS 2 nanoarchitectures comprised of the nanosheets with single-crystal or polycrystalline structure are respectively synthesized by a facile solvothermal method , and the influence of crystallinity structure on their sodium storage properties is revealed. It is found that the single-crystal structure can largely enhance the Na + intercalation kinetics in the crystal lattice and the structure stability during charge/discharge process. Therefore, the single-crystal VS 2 electrode exhibits an enhanced rate capability and cycling performance, delivering a high capacity of 193 and 172 mAhg −1 at a high rate of 0.5 and 1.0 Ag −1 , and 403 mAhg −1 after the following cycling test of 200 cycles at 0.2 Ag −1 . This work opens up new insights for the exploration and design of high-performance electrode materials for sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 29
·15080-15086
·
IF 8.867
Yuanju Qu,Mengmeng Shao,Yangfan Shao,Mingyang Yang,Jincheng Xu,Chi Tat Kwok,Xingqiang Shi,Zhouguang Lu,Hui Pan
It is a great challenge to explore cheap, abundant and eco-friendly electrocatalysts for hydrogen evolution reaction (HER). Here, we report the fabrication of VS2 nanoflowers with 1T phase by a simple hydrothermal method and their electrocatalytic performance in the HER. We find that the VS2 nanoflowers show comparable HER performance to Pt in acids, including an ultra-low onset potential of 32 mV, a Tafel slope of 34 mV dec−1 which resembles that of Pt, and a small overpotential of 58 mV (54 mV for Pt) at a current density of 10 mA cm−2. High stability and almost 100% faradaic efficiency indicate the practical application of VS2 nanoflowers in the HER. Our first-principles calculations reveal that the thermoneutral Gibbs free energy of hydrogen adsorption on both the basal and edge sites of the 1T-VS2 monolayer can be achieved under certain hydrogen coverage and the monolayer shows good conductivity, which contribute to the impressive catalytic performance of VS2 nanoflowers. We expect that the VS2 nanostructures may be applicable in electrocatalysis with high efficiency.
研究领域:
材料科学
·
能源化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 29
·5097-5105
·
IF 3.545
Zhenguo Wang,Ke Yu,Rong Huang,Ziqiang Zhu
With the development of the economy, energy shortages and the greenhouse effect gradually become problems facing humanity. Hydrogen energy is clean energy and is expected to become the most vital low-carbon energy in the future. At present, industrial hydrogen production mainly uses precious metals such as Pt. Therefore, it is of great significance to design a low-cost hydrogen evolution catalyst comparable in terms of hydrogen production performance and stability. In this work, porous Co3O4 with a hollow structure was prepared using the MOF template method, and VS2 nanosheets were uniformly attached and grown hydrothermally on it, thereby constructing a unique morphology of TS-Co3O4@VS2. The test results show that the catalyst can achieve a hydrogen evolution overpotential as low as 175.29 mV and a low Tafel slope (57.0 mV dec−1) and can work stably for 500 cycles at a current density of 100 mA cm−2 without noticeable performance degradation. Compared with other similar materials, this material significantly improves the kinetic process of the HER, reduces the reaction energy barrier for hydrogen evolution, and improves the operational stability of the catalyst. We believe that this material can provide a reference for the design of transition metal disulfide catalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Yaxiong Tian,Fangzhou Lu,Yun Wang,Ting Sun,Yuanli Liu
Heterogeneous materials combine the advantage of each component through the synergy effect to become promising electrode materials for lithium-ion batteries (LIBs). Designing heterojunctions with specific structures can better show their electrochemical performance. In this work, we fabricated VS 2 nanosheets perpendicular to the C/TiO 2 nanotube (VS 2 @C/TiO 2 ) composite with a “branch-leaf” structure by an electrospinning-carbonization-solvothermal method. Notably, the interior of the C/TiO 2 nanotube consists of small-sized TiO 2 nanoparticles , which guarantees high electrochemical reactivity. The presence of carbon not only accelerates charge transfer across the interface of carbon-TiO 2 but also serves as an anchor for the growth of VS 2 nanosheet by C S V bonding, thus enhancing the structural stability of the electrode. As anode for LIBs, the VS 2 @C/TiO 2 electrode exhibits a high reversible capacity of 748 mAh g −1 and 324.2 mAh g −1 at 100 mA g −1 and 1 A g −1 , respectively. This work highlights the unique “branch-leaf” design of VS 2 @C/TiO 2 , which offers a new prospect for developing high-performance heterogeneous electrodes for LIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 38
·20217-20227
·
IF 8.867
Wenbin Li,Jianfeng Huang,Liangliang Feng,Liyun Cao,Yongqiang Feng,Haijing Wang,Jiayin Li,Chunyan Yao
The meticulous design of coating structures is an efficient approach for enhancing the cycle life and rate capability of electrode materials. Herein, crystalline VOOH-coated VS2 microflowers (c-VS2@VOOH) constructed from nanosheets are successfully prepared by a facile one-step hydrothermal method. The c-VS2@VOOH composite as a sodium ion battery anode material delivers an excellent cycling stability of 330 mA h g−1 after 150 cycles at 0.2 A g−1. In particular, c-VS2@VOOH can still afford a high reversible capacity of 356 and 224 mA h g−1 even at 0.5 and 1.0 A g−1, respectively. The high capacity, good stability and enhanced rate capability are mainly attributed to the highly efficient surface sensitization and protection by crystalline VOOH, which can improve sodium ion diffusion and suppress the pulverization of VS2 nanosheets.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2023
·
IF 8.9
Huajing Wang,Zhou Cui,Rui Xiong,Xiaoxia Wang,Wulin Song,Xiang Guo,Xiao Wu,Baisheng Sa,Dawen Zeng
Although two-dimensional (2D) transition-metal dichalcogenides (TMDs) exhibit attractive prospects for gas-sensing applications, the rapid and precise sensing of TMDs at low loss remains challenging. Herein, a NO2 sensor based on an expanded VS2 (VS2-E)/carbon nanofibers (CNFs) composite (abbreviated as VS2-E-C) with ultrafast response/recovery at a low-loss state is reported. In particular, the impact of the CNF content on the NO2-sensing performance of VS2-E-C was thoroughly explored. Expanded VS2 nanosheets were grafted onto the surface of hollow CNFs, and the combination boosted the charge transport, exposing abundant active edges of VS2, which enhanced the adsorption of NO2 efficiently. The activity of the VS2 edge is further confirmed by stronger NO2 adsorption with a more negative adsorption energy (−3.42 eV) and greater than the basal VS2 surface (−1.26 eV). Moreover, the exposure of rich edges induced the emergence of the expanded interlayers, which promoted the adsorption/desorption of NO2 and the interaction of gas molecules within VS2-E-C. The synergism of edge effect and interlayer engineering confers the VS2-E-C3 sensor with ultrafast response/recovery speed (9/10 s) at 60 °C, high sensitivity (∼2.50 to 15 ppm NO2), good selectivity/stability, and a low detection limit of 23 ppb. The excellent “4S” functions indicate the promising prospect of the VS2-E-C3 sensor for fast and precise NO2 detection at low-loss condition.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
Hou Yao-Lin,Zhang Yu-Qing,Li Dan,Xie Hai-Ming,Liu Jia,Liu Yu-Long,Zhu Jie-Fang
Developing effective heterostructure strategies to mitigate the shuttling effect and accelerate lithium polysulfide (LiPS) conversion remains a critical challenge in lithium–sulfur (Li–S) batteries. Here, we report the first carbon–free VO 2 –VS 2 heterostructure material synthesized via in situ sulfurization, applied as a modifier on a commercial polypropylene (PP) separator (denoted as VO 2 –VS 2 @PP). The as–prepared VO 2 –VS 2 nanorods synergistically combine the high absorptivity of VO 2 with the efficient catalytic properties of VS 2 , simultaneously enhancing LiPS anchoring and promoting its conversion. We systematically investigate the influence of material composition on battery performance, leveraging these functional attributes, Li–S cells incorporating VO 2 –VS 2 @PP exhibit exceptional cycle stability (over 500 cycles at 1C), impressive rate performance (807 mAh·g –1 at 5C), desirable reversibility (49.9% capacity retention after 300 cycles at 5C) and exceptional pouch cell performance (3.65 mAh·cm –2 after 50 stable cycles at 0.1C). This study underscores the potential of tailored heterostructures in realizing high–performance Li–S batteries, offering new insights for next–generation energy storage solutions. Graphical abstract
研究领域:
材料科学
·
能源存储技术
✓ 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）