INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Zhaoxing Li,Ming Xu,Ting Wang,Yating Yang,Yuanze Li,Mei Liu,Yubo Liu,Ming Feng
Exploring low-cost and highly efficient electrocatalysts with bifunctional activities of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is practically essential for overall water splitting. Nevertheless, perfectly balancing the catalytic behavior between HER and OER continues to be a great challenge due to their distinct conducting behaviors and free energies. Herein, an advanced bifunctional electrocatalyst based on P-doped defective MoS 2 /MoO 2 heterostructure integrated onto highly conductive carbon cloth has been constructed for overall water splitting in acidic media. By reasonably controlling reaction conditions, the MoS 2 /MoO 2 heterostructure can be rationally constructed and the corresponding sulfur vacancies can be well optimized. Meanwhile, the abundant oxygen vacancies can be also created during the heat transformation processes. Benefiting from the unique structural features that favor the active species adsorption and electron transfer, the resultant A-P-M-3/CC catalyst exhibits exceptional bifunctional electrocatalytic activity, with low overpotentials of 67 and 104 mV at 10 mA cm −2 for HER and OER, respectively. When coupled in a two-electrode electrolyzer, A-P-M-3/CC delivers 10 mA cm −2 at a low cell voltage of 1.44 V with good stability, surpassing most of similar electrocatalysts. This work offers a novel avenue for water splitting catalyst optimization.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Aiping Wu,Chungui Tian,Yanqing Jiao,Qing Yan,Guoyu Yang,Honggang Fu
The visible-light driven, Pt-free photocatalytic H 2 evolution (PHE) is promising for clean and sustainable H 2 production. The construction of the heterojunction structure with intimate contact and good light adsorption ability is important for realizing the high effective PHE. Here, the core-shell structured MoS 2 /CdS hybrids were constructed through “sequential two-step hydrothermal growth” route for Pt-free PHE. In the synthesis, the hierarchical flower-like MoS 2 was firstly obtained through the reaction of ammonium molybdate and excessive thiourea. Subsequently, without need of centrifugation, the cadmium acetate (Cd source) was added into the cooled MoS 2 solution directly followed by a secondary hydrothermal reaction. In the process, the Cd 2+ could react with partially S 2− in MoS 2 (substituted reaction) and with the excessive S 2− ions in solution to generate CdS, resulting in the formation of CdS shell contacted with MoS 2 core. The micro-structure of the composites (such as the thickness and morphology of CdS shell) could be tuned by changing the amount of Mo source and Cd source. In the composites, the CdS on the outside is convenient to absorb the solar light. The intimate contact of CdS and MoS 2 is beneficial to charge transfer. As a result, the MoS 2 /CdS catalyst showed high catalytic activity for PHE under visible light irradiation (λ > 420 nm). The H 2 evolution rate could reach to 775 μmol h −1 (20 mg catalyst), which is much higher than pure CdS (12 μmol h −1 ) and Pt-CdS (64 μmol h −1 ). The good activity should be related with CdS outside shell beneficial for light adsorption and intimate contact of CdS and MoS 2 for easy charge transfer. A series of experiments demonstrate that the formation of the heterojunction can effectively enhance the charge transfer ability and retard the recombination of electron-hole pairs, thus improving PHE activity and alleviating the photocorrosion of CdS component.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xing-Liang Yin,Lei-Lei Li,Jian-Hua Jiang,Xin-Xin Du,Dong-Hui Pang,Jie Yang,Zhong-Jia Li,Yuan-Xu Wang,Xin-Yue Li,Da-Cheng Li,Jian-Min Dou
Photocatalytic H 2 evolution from water splitting offers an attractive scientific and technological method to address the energy and environmental crisis. In this study, noble-metal-free Zn 0.5 Cd 0.5 S@MoS 2 core@shell nanoheterostructures were elaborately designed and successfully synthesized. The visible-light-driven photocatalytic performance investigation shows that the Zn 0.5 Cd 0.5 S@MoS 2 exhibits a state-of-the-art H 2 evolution rate of 40.2 mmol g −1 h −1 far exceeding that of pristine Zn 0.5 Cd 0.5 S by more than 57 times. Moreover, thanks to the protection of MoS 2 shells, the Zn 0.5 Cd 0.5 S@MoS 2 can retain long-term stability in four-cycles of 24 h reactions. Furthermore, a tentative mechanism on H 2 generation was systematically investigated and proposed, which contributes to understand the enhanced photocatalytic activity of the Zn 0.5 Cd 0.5 S@MoS 2 heterostructures and may inspire the synthesis of other desirable catalytic systems.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Lixin Song,Tianwei Wang,Wanru Jing,Xueyao Xie,Pingfan Du,Jie Xiong
Power source is a core component of wearable electronic device. To obtain a suitable power source, the highly flexible MoS 2 /TiC/C nanofibrous (NFs) film was prepared and employed as the Pt-free and transparent conductive oxide (TCO)-free counter electrode (CE) of flexible dye-sensitized solar cell (FDSSC). Then the FDSSC was combined with a fabric to form a photovoltaic textile. Notably, there was no substrate of CE in the device due to the desired mechanical property of the MoS 2 /TiC/C NFs film. The obtained FDSSC based photovoltaic textile possessed power conversion efficiency of 5.08%, which was larger than that of Pt based device. The main reasons may be the large BET surface area and promising electrocatalytic activity of the MoS 2 /TiC/C CE. Besides, the combination of FDSSC with fabric was extremely easy and simple. Hence, the photovoltaic textile exhibited huge potential applications in smart textile for wearable electronic devices.
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高影响因子
ChemElectroChem
·
2017
·Vol. 5
·期 2
·383-390
·
IF 4.136
Hang Zhao,Jianlong Li,Hao Wu,Tiange Dong,Yun Zhang,Heng Liu
The molybdenum sulfide has a layered structure, similar to graphite, and delivers a good transfer channel for lithium ions as an anode. To enhance the discharge capacity and cycling stability of the molybdenum sulfide, exfoliated MoS 2 nanoflakes with a N-doped carbon coating were prepared by exfoliation of bulk MoS 2 and carbonization of a polydopamine coating. The morphological characteristics show that the carbonized polydopamine was coated on the surface of MoS 2 nanoflakes successfully. Consequently, as-prepared E-MoS 2 @NC delivers a good electrochemical performance and cycling stability as the anode for lithium-ion batteries; the reversible lithium storage capacity was up to 650 mAh g −1 at a current density of 0.2 A g −1 , and the discharge specific capacity was stabilized at 562 mAh g −1 even after 200 cycles at a current density of 0.5 A g −1 . Graphical Exfoliation and carbon coating : The exfoliation and polydopamine coating method are combined to prepare a N-doped carbon coating of exfoliated MoS 2 nanoflakes for anodes of lithium-ion batteries. The exfoliation treatment reduced the MoS 2 particle size and shortened the Li-ion migration path. The N-doped carbon coating enhanced the conductivity of exfoliated MoS 2 nanoflakes, promoted the lithium ion transport, and enhanced the corresponding electrochemical performance. The discharge specific capacity could be stabilized at 562 mAh g −1 after 200 cycles at a current density of 0.5 A g −1 .
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高影响因子
Materials Today Physics
·
2024
·
IF 10
Kaiyi Wang,Ruoyan Xu,Fenglin Gao,Shiyao Xu,Shijie Hao,Chen Fan,Yuan Zhang,Yuehua Wei,Xiongxiong Xue,Guolin Hao
Two-dimensional (2D) bilayer transition metal dichalcogenides (TMDCs) have attracted considerable attention due to their promising applications in the fields of electronics, optoelectronics , valleytronics and nonlinear optics . However, the precise synthesis of large-area, high-yield and uniform bilayer MoS 2 semiconductors remains a significant challenge. Herein, we have developed one two-stage chemical vapor deposition strategy based on strain engineering, enabling the controlled preparation of large-area (4 × 6 cm 2 ) bilayer MoS 2 nanostructures . Systematic characterizations indicate that compressive strain was introduced during the growth of first layer MoS 2 , which effectively induces the synthesis of the second layer MoS 2 . First-principles calculations based on density functional theory further reveal the mechanism of strain induced controllable growth of bilayer MoS 2 . Field-effect transistors based on AA and AB stacking bilayer MoS 2 have been fabricated exhibiting excellent electronic properties. Our work provides a new pathway for the precise preparation of bilayer TMDCs nanostructures, offering experimental support for their application in the field of electronic and optoelectronic devices .
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 27
·2200912
·
IF 6.389
Zhongquan Xu,Yonghong Zeng,Fanxu Meng,Shan Gao,Sidi Fan,Yi Liu,Yule Zhang,Swelm Wageh,Ahmed A. Al-Ghamdi,Jing Xiao,Zhinan Guo,Han Zhang
Methylammonium lead bromide (MAPbBr 3 ) single crystal thin film shows great opportunities in high-performance optoelectronic devices due to its high absorption coefficient, high photoelectric conversion efficiency, and low trap-state density properties. In order to fabricate a highly sensitive self-powered photodetectors, herein, a MAPbBr 3 single crystal thin film/molybdenum disulfide (MoS 2 ) vertical p-n heterostructure based photodetector has been built by typical polymer film assisted dry transfer method and micromachining technique. Attributing to the built-in electric field and the shortened transmit distance for the photogenerated carriers in this heterostructure, the device shows excellent photovoltaic characteristics with a maximum output electrical power of 7 nW and power conversion efficiency of 8% at 0.34 V under 532 nm laser. Moreover, prominent photoelectric properties with responsivity of 368 mA W −1 and detectivity of 3.74 × 10 12 Jones for 532 nm laser without any bias have been achieved, which are ranking high among the organic–inorganic hybrid perovskites based self-power photodetectors. These results demonstrate that the MAPbBr 3 single crystal thin film/MoS 2 vertical heterostructure can pave a new way to develop high-performance photovoltaic devices.
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高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Miao Huang,Wencong Li,Xiangdong Xu
With rapid increases of population and chemical discharge, treatment and recycling of wastewater have become increasing important. Herein, a new approach for ultrafast degradations of both organic and inorganic pollutants in wastewater by only piezocatalysis, triggered by low air pressure on MoS 2 , is described. Results reveal that the degradation rates of organic methylene blue and inorganic nitrite reach 99.5 % within 75 s and 91.5 % within 1200 s, with the first-order rate constants of 0.072 s −1 and 0.0016 s −1 , respectively. Both degradation rates are faster than those of other methods previously reported. And coexistence of organic and inorganic pollutants causes further enhancement of the piezocatalysis efficiency. Particularly, the piezocatalysis of commercial MoS 2 can be efficiently activated by this air-pressure approach, which is difficult to realize by previous others. The piezocatalytic degradations of other organic pollutants can be similarly induced. Moreover, higher degradation rates are measured in neutral or weakly alkaline environments, and high degradation efficiencies (> 90 %) can be similarly achieved in various water sources. Theoretical simulations support the experimental findings, both indicating a new, environment-friendly, and low-cost approach for efficiently activating the piezocatalysis of MoS 2 by low air pressure, thus leading to wastewater purification and energy conservation.
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.6
Panpan Zhang,Yongkang Meng,Zihan Xu,Mikaiergu Sulitan,Chunsheng Lu,Yangyang Yang,Xiaowei Li,Yu Zhou,Yunjian Liu
The 2H-MoS 2 /N-doped carbon (2H-MoS 2 /NC) composite has demonstrated great promise as an anode material for sodium-ion batteries (SIBs); however, its rate performance and cycling capability are still limited by the intrinsically poor electronic conductivity and the scarcity of in-plane active sites in 2H-MoS 2 . In this paper, Mn doping is applied as an effective strategy to overcome these limitations. A Mn-doped 2H-MoS 2 /NC (Mn-2H-MoS 2 /NC) composite is successfully synthesized via a simple one-step hydrothermal-calcination process. Electrochemical evaluations show that the Mn-2H-MoS 2 /NC electrode delivers a reversible specific capacity of 301.42 mAh g –1 after 150 cycles at a current density of 1 A g –1 . Especially, even at a high current density of 5 A g –1 , a capacity of 131.66 mAh g –1 is retained after 500 cycles. This performance far exceeds that of the pristine 2H-MoS 2 /NC anode (51.12 mAh g –1 ). Experimental and theoretical analyses reveal that Mn doping not only serves as an effective microstructural regulator (expanding the interlayer spacing and reducing the stacking layer of MoS 2 ) but also intrinsically transforms MoS 2 from a semiconductor into a conductor while increasing the density of active sites within and on the MoS 2 lattice. These synergistic effects facilitate rapid electron transport, accelerate Na + adsorption and intercalation, and enhance the reversibility of the conversion reaction. Consequently, Na + storage kinetics is significantly improved, leading to the superior cycling stability and rate performance of the Mn-2H-MoS 2 /NC electrode.
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DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 12
·530
·
IF 5.705
Ding Chuanmin,Song Kaijing,Meng Hongyun,Zhang Bing,Zhao Zhihuan,Chang Honghong,Wei Wenlong
The authors describe an amplified photoelectrochemical immunoassay for the tumor marker carbohydrate antigen 724 (CA724). The method employs a C 3 N 4 -MoS 2 semiconductor as the photoelectric conversion layer. The nanocomposite was characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, and UV-vis diffuse reflectometry. The dye eosin Y was encapsulated into CaCO 3 nanospheres which then were used as labels for antibody against CA724. In addition, Fe 3 O 4 nanospheres were employed as magnetic platform for constructing photoelectrochemical sandwich immunoassay. The CaCO 3 nanospheres can be dissolved with aid of ethylene diamine tetraacetic acid (EDTA) and the carried eosin Y in CaCO 3 is released. The released dyes sensitizes the C 3 N 4 -MoS 2 semiconductor, which induces photocurrent amplification. Under optimal conditions and at a typical working voltage of 0 V (vs. SCE), the photocurrent increases linearly in the range of 0.05 mU mL −1 to 500 mU mL −1 of CA724, with a 0.02 mU mL −1 detection limit.
The C 3 N 4 -MoS 2 complex, with high efficiency of electron transport, was synthesized to construct a photoelectrochemical analytical platform. A sandwich-type immunoassay was established on the surface of magnetic beads. Carbohydrate antigen 724 in sample was detected sensitively by using sensitization of released eosin Y as signal amplifiery.
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 72
·42316-42323
·
IF 3.049
Chong Wang,Changzhen Zhan,Xiaolong Ren,Ruitao Lv,Wanci Shen,Feiyu Kang,Zheng-Hong Huang
Lithium ion capacitors (LICs), bridging the advantages of batteries and electrochemical capacitors, are regarded as one of the most promising energy storage devices. Nevertheless, it is always limited by the anodes that accompany with low capacity and poor rate performance. Here, we develop a versatile and scalable method including ball-milling and pyrolysis to synthesize exfoliated MoS2 supported by N-doped carbon matrix derived from chitosan, which is encapsulated by pitch-derived carbon shells (MoS2/CP). Because the carbon matrix with high nitrogen content can improve the electron conductivity, the robust carbon shells can suppress the volume expansion during cycles, and the sufficient exfoliation of lamellar MoS2 can reduce the ions transfer paths, the MoS2/CP electrode delivers high specific capacity (530 mA h g−1 at 100 mA g−1), remarkable rate capability (230 mA h g−1 at 10 A g−1) and superior cycle performance (73% retention after 250 cycles). Thereby, the LICs, composed of MoS2/CP as the anode and commercial activated carbon (21 KS) as the cathode, exhibit high power density of 35.81 kW kg−1 at 19.86 W h kg−1 and high energy density of 87.74 W h kg−1 at 0.253 kW kg−1.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Qijing Guo,Hao Yi,Feifei Jia,Shaoxian Song
Phase change materials (PCMs) offer significant advantages in energy conversion and storage by facilitating the storage and release of thermal energy during phase transition processes. However, challenges such as leakage during PCM phase transitions and poor light absorption properties have constrained their application in the field of photothermal energy storage. In this study, Montmorillonite (Mt) and molybdenum disulfide (MoS 2 ) has been used to design and synthesize hybrid aerogels (MoS 2 /Mt) boasting high mechanical strength and excellent photothermal conversion performance. These aerogels are then used to encapsulate polyethylene glycol (PEG) to prepare composite PCMs with outstanding solar-thermal conversion and storage performances. The results show that the synthesized MoS 2 /Mt-PEG composite PCMs exhibit high enthalpies of melting and solidification of 169.16 J/g and 170.78 J/g, respectively, while the aerogel supporting material has a high compressive modulus of 1.96 MPa. Moreover, the composite material displayed excellent thermal stability and leakage resistance after undergoing 30 melting-cooling cycles. Furthermore, the incorporation of MoS 2 imparted outstanding light absorption properties to the MoS 2 /Mt-PEG composite, resulting in a high light absorption and photothermal conversion-storage efficiency of 93.4 % and 96.47 %, respectively. Synthesized composite PCMs also demonstrate outstanding performance in solar-thermal-electricity conversion, achieving a voltage output of 458 mV under illumination conditions and maintaining a sustainable voltage output even after removing the light source. Thus, the composite PCMs prepared in this work can meet the requirements of high enthalpy, effective leakage prevention, efficient solar-thermal conversion and solar-thermal-electricity conversion performance, thereby presenting potential applications in practical solar energy collection, conversion, and storage.
研究领域:
材料科学
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能源化学
·
纳米复合材料
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热能存储
·
光热转换
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高影响因子
危险品化学品经营许可证（带存储）