Small Methods
·
2020
·Vol. 4
·期 9
·2000353
·
IF 12.13
Mingshan Wang,Hua Yang,Kangqi Shen,Hao Xu,Wenjie Wang,Zhenliang Yang,Lei Zhang,Junchen Chen,Yun Huang,Mingyang Chen,David Mitlin,Xing Li
A stable lean-electrolyte operating lithium–sulfur (Li–S) battery based on a cathode of Li 2 S in situ electrocatalytically deposited from L 2 S 8 catholyte onto a support of metallic molybdenum disulfide (1T-MoS 2 ) on carbon cloth (CC) is created. The 1T-MoS 2 significantly accelerates the conversion Li 2 S 8 catholyte to Li 2 S, chemically adsorbs lithium polysulfide (LiPSs) from solution, and suppresses crossover of the LiPSs to the anode. These experimental findings are explained by density functional theory calculations that show that 1T-MoS 2 gives rise to strong adsorption of polysulfides on its surface and is electrocatalytic for the targeted reversible Li–S conversion reactions. The CC/1T-MoS 2 electrode in a Li–S battery delivers an initial capacity of 1238 mAh g −1 , with a low capacity fade of only 0.051% per cycle over 500 cycles at 0.5 C . Even at a high sulfur loading (4.4 mg cm −2 ) and low electrolyte/S (E/S) ratio of 3.7 µL mg −1 , the battery achieves an initial reversible capacity of 1176 mA h g −1 at 0.5 C , with 87% capacity retention after 160 cycles. The post 500 cycles Li metal opposing 1T-MoS 2 is substantially smoother than the Li opposing CC, with XPS supporting the role of 1T-MoS 2 in inhibiting LiPSs crossover.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Green Energy & Environment
·
2020
·
IF 6.395
Huanran Li,Xiaobo Han,Suyu Jiang,Lili Zhang,Wei Ma,Renzhi Ma,Zhen Zhou
The layered materials have demonstrated great prospects as cost-effective substitutes for precious electrocatalysts in hydrogen evolution reaction. Research efforts have been devoted to synthesizing highly conductive MoS 2 with the substantial cardinal plane and edge active sites. Here, we successfully synthesized a hierarchical 1T/2H–MoS 2 with sodium ion insertion via a facile hydrothermal method. The contents of the 1T-phase can be flexibly controlled by different hydrothermal temperatures (160 ∼ 200 °C). And the modified uniformly dispersed 1T/2H–MoS 2 nanospheres with different d spacings were designed to enhance the electrocatalytic efficiency by adding SiO 2 and through the ion exchange process of NaOH and HF solution. The as-synthesized Na + intercalated 1T-MoS 2 nanosphere with an expanded interlayer of 0.95 nm obtained at 160 °C exhibits a prominent electrocatalytic performance of hydrogen evolution reaction with a comparable overpotential of 255 mV and a remarkably small Tafel slope of 44 mV/decade. Therefore, this study provides a facile and controllable strategy to yield interlayer-expanded 1T-MoS 2 nanospheres, making it a potentially competitive hydrogen evolution catalyst for the hydrogen cell.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Qingyun Liu,Yi Wang,Tianzhao Hu,Shaorui Chen,Yaozu Wang,Hui Zhao,Wu Zhang,Zhigang Yuan,Yulian Wang,Zhenhua Sun,Feng Li
Achieving high energy density in aqueous asymmetric electrochemical capacitors hinges on the development of electrode materials that combine exceptional capacitance with superior conductivity. Despite its high theoretical capacitance, Ni(OH)2 is limited by low intrinsic conductivity, significantly limiting its performance. In this study, a Mn–Ni(OH)2@1T-MoS2 heterostructure was synthesized through a facile growth method, achieving significant electrochemical performance boost. The lattice matching at the heterointerface induces a controlled lattice expansion in Mn–Ni(OH)2, while the interfacial interactions promote electron transfer from Mn–Ni(OH)2 to 1T-MoS2. These synergistic effects enhance conductivity and active site utilization, addressing the core challenges of pristine Ni(OH)2. As a result, the heterostructure exhibits a high specific capacity of 244.2 mA h g−1 at 1 A g−1 and a rate capability of 51.4% at 12 A g−1. Moreover, the assembled asymmetric electrochemical capacitor delivers an energy density of 61.67 W h kg−1 at 600 W kg−1 and maintains 72.7% capacity retention after 10 000 cycles at 5 A g−1. This work not only highlights the critical role of heterointerfaces in enhanced electrochemical performance but also provides a robust strategy for designing high-performance energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Zhong Dong,Xu Wu,Mengying Chen,Hanxiao Chen,Ke-Jing Huang,Lingling Wang,Jing Xu
Pure phase MoS 2 has low conductivity, but with high theoretical specific capacity, and WS 2 possesses a high intrinsic conductivity, but suffer from rapid capacity fading. Predictably, the combination of these two transition metal sulfide compounds can complement each other and improve electrochemical performance comprehensively. Whereas, bimetallic phase sulfide of MoS 2 and WS 2 composites have not been researched in SIBs . In this paper, 1T metallic phase MoS 2 and WS 2 vertically growth on flexible carbon cloth (CC) surface (1T-MoS 2 @WS 2 @CC) by a simple hydrothermal method. The electrochemical performance was improved by heterojunction synergistic effect and the enhanced interlayers of the composite material. Specifically, the superelevation reversible capacity of 529.4 mAh/g can be obtained even after 100 cycles at the current density of 100 mA g −1 , and the 259.2 mAh/g capacity can be maintained even at high current density of 1000 mA g −1 after 60 cycles. Besides, the designed 1T-MoS 2 @WS 2 @CC composite material has excellent rate performance and cycle stability which are guarantee for battery core performance. Thus, there is every reason to believe that the advanced 1T-MoS 2 @WS 2 @CC electrode material has great potential in the future high performance energy storage devices.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiaying Shen,Yefan Liu,Qianqiao Chen,Wanchin Yu,Qin Zhong
Rational design and construction of bifunctional heterostructure electrocatalysts with high-conductivity and more active sites is imperative for water splitting. Herein, based on the tunable property of layered double hydroxide laminates cations, topological transformation technology and template confine method, a series of high-performance bifunctional catalysts composed of transition metal doping NiCo 2 S 4 (MNiCoS 4 , M = Cu, Fe, Zn, Mn) and 1T-MoS 2 were in-situ fabricated on nickel foam. In particular, CuNiCoS 4 /1T-MoS 2 exhibits an ultralow overpotential of 163 mV at 50 mA cm −2 for oxygen evolution reaction (OER) and favorable hydrogen evolution reaction activity. The two-electrode system requires only 1.52 V to attain a current density of 10 mA cm −2 . To the best of our knowledge, its OER electrocatalytic activity far exceed state-of-art catalysts reported. The outstanding performance of this series of catalysts can be attributed to two aspects. First, the highly conductive 1T-MoS 2 can facilitate electron transfer , and second, the defect-rich heterostructure can effectively regulate the electronic structure of the active metal and expose abundant active sites. This work provides a valuable strategy for developing high activity electrocatalysts for efficient water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Energy Research
·
2025
·
IF 2.4
Tianjiao Huang,Wu Xia,Fnu Joshua,Vaishnavii Subbiah Ponnusamy,Qipeng Zhang,Sachin Kumar,Ao Yu
Rational interfacial engineering is crucial to designing non-precious electrocatalysts for the hydrogen evolution reaction (HER). Here we report a Cu3N/1T-MoS2 heterojunction in which ultrathin 1T-MoS2 nanosheets are conformally grown on conductive p-type Cu3N nanocubes. Spectroscopy and microscopy reveal intimate lattice contact and interfacial strain, while XPS indicates charge redistribution across the junction. In 0.5 M H2SO4, the optimized 1:1 composite delivers an overpotential of 387 mV at 50 mA cm−2 and a Tafel slope of 57 mV dec−1, outperforming both constituents (MoS2 ≈ 456 mV; Cu3N inactive at this current density). Continuous operation for 150 h demonstrates excellent acid stability. Electrochemical impedance and double-layer capacitance analyses show the lowest charge-transfer resistance and the highest electrochemically active surface area among all samples (Cdl = 103.6 mF cm−2), corroborating rapid electron transport and abundant accessible sites. The activity enhancement arises from a p–n heterojunction with a built-in field that promotes directional electron flow to MoS2 active edges, together with strain-induced defect exposure. This work identifies Cu3N as an effective platform to stabilize conductive MoS2 and provides design rules for interface-engineered HER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 6
·491
·
IF 2.8
Chen Yongbo,Chen Zhiyue,Xiang Minghui,Zhou Yi,Zhang Jin
The crucial oxidant in photocatalytic degradation of dye is the photogenerated reactive oxygen species (ROS) but many photocatalytic processes suffer from low ROS generation efficiency. In this paper, 1T-MoS 2 quantum dot modified flower-like BiOBr nanocomposites were synthesized to forming a Type-II heterojunction. As-prepared 1T-MoS 2 @BiOB composites showing excellent activity for degradation of rhodamine B (RhB) under visible light, BiOBr loaded with 0.2wt% 1T-MoS 2 quantum dots has achieved 96.9% efficiency within 18 min. Such outstanding photocatalytic activity is attributed to the flower-like structure and heterojunction between 1 T-MoS 2 and BiOBr which provide a fast transfer pathway for excitons and promote the activation of molecular oxygen. In addition, a possible catalytic mechanism was proposed. This work will provide new insight for design and fabrication of cheaper and more effective photocatalysts for molecular oxygen activation in environmental remediation.
研究领域:
材料科学
·
光催化
·
环境修复
·
纳米技术
·
能源与催化
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 70
·16054-16062
·
IF 5.16
Raheela Naz,Qinglei Liu,Waseem Abbas,Muhammad Imtiaz,Imran Zada,Javed Ahmad,Tengfei Li,Jiajun Gu
A new ternary composite of 1T-molybdenum disulfide, hexagonal tungsten trioxide, and reduced graphene oxide (M-W-rGO) is synthesized by using a one-pot hydrothermal process. The synergetic effect of 1T-MoS 2 and hexa-WO 3 nanoflowers improves the electrochemical performance for supercapacitors by inducing additional active sites and hexagonal tunnels, respectively, which lead to high storage capacity and easy transfer of electrolyte ions. The ternary M-W-rGO composite has a high specific capacitance of 836 F g −1 at 1 A g −1 , which is nearly twice that of binary composites of M-rGO and W-rGO with high capacitance retention of 86.35 % after 3000 cycles at a high current density of 5 A g −1 . This study provides a new ternary composite that can be used as an electrode material for high-performance supercapacitors. Graphical The flower of supercapacitors : 1T-MoS 2 and hexa-WO 3 nanoflowers are grown on a 3D network of reduced graphene oxide by using a one-pot hydrothermal process. The hexagonal tunnel structure of WO 3 and 1T conducting phase of MoS 2 provide additional active sites, high storage capacity, and easy electronic transportation for high-performance supercapacitor applications.
研究领域:
材料科学
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电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiaorong Gan,Jianlin Zhang,Jiabei Liu,Yuanhe Bai,Xinyi Su,Weiqing Wang,Zhuang Cao,Huimin Zhao,Yanhui Ao,Peifang Wang
Simultaneously improving electron and mass transfer processes is full of challenges for electrode material design. To this end, three-dimensional (3D) porous electrode materials were obtained via covalent combination between defective 1T-MoS2 nanosheets and polyaniline (PANI) through hydrothermal/solvothermal processes and surface polymerization reactions. Our experimental results and density functional theory calculations jointly reveal that PANI molecules can not only intercalate into van der Waals (vdW) gaps of 1T-MoS2 nanosheets but also chemically adsorb onto S-vacancy clusters (via Mo–N covalent bonds), rather than single atomic S-vacancies due to steric effects. Similarly, the geometric structure of PANI in the vdW gaps of 1T-MoS2 nanosheets possesses a flat-lying configuration for better stability. Compared to surface functionalization, interlayer intercalation has more profound effects on electronic structures for improving electrochemical properties, including reduced band gaps, small effective electron masses, and high mobility. As a proof-of-concept application, the 1T-MoS2–PANI nanocomposites were used to construct an electrochemical sensor for trace Cu2+, which exhibits high sensitivity and selectivity with a wide linear range from 3 to 450 nM and a low detection limit because of excellent conductivity, a low contact barrier against electron transfer, high mass transfer, and strong coordination interactions between PANI and Cu2+.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yiqing Lv,Xiaohan Li,Yan Du,Jinting Zou,Jinyan Yu,Ji Yang,Limei Cao
As a highly toxic heavy metal, mercury is bioaccumulative and persistent, causing environment pollution and posing potential risks to human health. This study focuses on Hg 2+ in aquatic environments and proposes an electrochemical method to reduce and recycle of Hg 2+ , aiming to mitigate mercury pollution and prevent ecological risks associated with mercury methylation. A graphite felt(GF) composite electrode incorporating Co-doped molybdenum disulfide(Co/MoS 2 @GF) was developed for efficient Hg 2+ removal from wastewater, which was synthesized by a one-step solvothermal method. The Co/MoS 2 @GF(n(Mo):n(Co) = 12:1) electrode achieved 95.0 % Hg 2+ removal efficiency in its initial use, and maintained a consistent Hg 2+ removal efficiency over 87.0 % after five reuse cycles, demonstrating high mercury removal capability and remarkable stability. The Co doping optimized the material’s surface morphology and electronic structure. This modification increased the number of active sites that can generate a large amount of active hydrogen(H*), significantly enhancing mercury reduction efficiency. We determined the optimal reaction conditions for the electrode through influencing factors analysis. The design electrochemical reduction system combines facile synthesis with environmental compatibility, providing a technologically relevant strategy for mercury-contaminated wastewater remediation and concurrent mercury resource recovery, demonstrating significant application potential.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Duqiang Xin,Shaodan He,Xiaona Han,Xudong Zhang,Zhaofang Cheng,Minggang Xia
The widespread use of wearable devices has triggered a huge demand for flexible power source. Flexible lithium-ion batteries (LIBs) are widely regarded as an ideal power source for wearable devices because of their high energy density and long cycle life, but their application is limited by traditional rigid electrodes. A promising strategy is to prepare flexible electrodes by synthesising active materials with high capacity on flexible carbon substrates. In this study, Co-doped 1T‐MoS 2 nanosheets were successfully anchored on a pretreatment carbon cloth (CC) by using a facile one-step solvothermal method, which is denoted as Co-MoS 2 /CC. Benefiting from the high conductivity and large layer spacing of the metallic 1T‐MoS 2 , self-supporting CC framework, doping of cobalt and their synergistic effect, when used as a self-supporting anode for LIBs, Co-MoS 2 /CC delivers a high reversible capacity of 1392 mAh g −1 at 0.1 A g −1 and retains 611 mAh g −1 at 2 A g −1 over 300 cycles. Furthermore, it delivers a remarkable rate performance of 230 mAh g −1 at 10 A g −1 . The facile and scalable synthesis method can also be applied to other similar flexible free-standing electrodes for the application of electrochemical energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xinzhi Wang,Zhenguo Chen,Yutian He,Xiaohui Yi,Chao Zhang,Qiao Zhou,Xuezhu Xiang,Yunan Gao,Mingzhi Huang
Imidacloprid (IMI) which has been widely detected in the natural water environment is potentially genotoxic to humans and should be effectively eliminated. Persulfate-based advanced oxidation processes are considered to be reliable means aiming at organic pollutants degradation, while an efficient catalyst is urgently needed for the activation of the reaction. As a two-dimensional material, 1T-MoS 2 is expected to be applied for the activation of persulfates due to its abundant active sites and good electrical conductivity. Therefore, in this study, 1T-MoS 2 was synthesized by a simple and safe two-step solvothermal reaction and proposed as an emerging activator of peroxymonosulfate (PMS) for the degradation of IMI. It was found that 1T-MoS 2 has significantly better catalytic performance on PMS than 2H-MoS 2 and Bulk-MoS 2 , reaching. 76.4 % at pH = 3. The degradation rate of IMI reduced under alkaline conditions due to the inhibition of catalytic processes. Among the different coexisting anions, H C O 3 - had the greatest degree of interference and inhibition to the degradation process, resulting in the lowest IMI degradation rate for only 42.45 %. Quenching experiments and EPR analysis showed that S O 4 - ∙ and OH were the main reactive oxygen species in the 1T-MoS 2 /PMS process. In addition, the IMI degradation pathways analyzed by UPLC-Q-TOF-MS/MS included dehydrogenation, electrophilic addition, heterocyclic ring breakage and intramolecular rearrangement. This study promotes the application of 1T-MoS 2 and is expected to provide a novel persulfate-based advanced oxidation process catalyzed by 1T-MoS 2 for IMI elimination in the aqueous environment.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）