Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Wang Xin,Liu Boyan,Ma Siqing,Zhang Yingjuan,Wang Lianzhou,Zhu Gangqiang,Huang Wei,Wang Songcan
Amorphous semiconductors without perfect crystalline lattice structures are usually considered to be unfavorable for photocatalysis due to the presence of enriched trap states and defects. Here we demonstrate that breaking long-range atomic order in an amorphous ZnCdS photocatalyst can induce dipole moments and generate strong electric fields within the particles which facilitates charge separation and transfer. Loading 1 wt.% of low-cost Co-MoS x cocatalysts to the ZnCdS material increases the H 2 evolution rate to 70.13 mmol g −1 h −1 , which is over 5 times higher than its crystalline counterpart and is stable over the long-term up to 160 h. A flexible 20 cm × 20 cm Co-MoS x /ZnCdS film is prepared by a facile blade-coating technique and can generate numerous observable H 2 bubbles under natural sunlight, exhibiting potential for scale-up solar H 2 production.
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 CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Sathish Reddy,Ran Du,Lixing Kang,Nannan Mao,Jin Zhang
Preparation of electrocatalysts with high activity and low cost are essential for mass production of hydrogen. However, preparation of such catalyst are still highly challenging thus far. In this paper, we focus on preparation of a three- dimensional CNTs aerogel/MoS x catalyst by using solvothermal process. The MoS x material has been successfully combined with three- dimensional CNTs aerogel and creates a sufficient active site exposure as well as 3D conductive networks for fast charge transport. Due to this the catalyst exhibited high activity for HER with a small onset over potential of ∼150 mV, a Tafel slope of 62 mV dec −1 , and an exchange current density of 6.4 mA cm −2 . The catalysts also show excellent stability during long-term 1000 cycles and electrolysis confirm the durability of the catalyst. The enhanced performance is attributed to synergistic effects of CNTs aerogel and MoSx, which enhance the activities for both components for HER.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Qiulong Gao,Shuwen Liu,Kaiming Hou,Xiaonan Miao,Zhangpeng Li,Jinqing Wang
Environment-friendly and sustainable deep eutectic solvents (DESs) are considered as a new type of lubricant. Here, MoS x /rGO nanohybrids were prepared as lubricant additive to improve the tribological performance of DES. The nanohybrids exhibited excellent dispersibility in DES. Tribological tests indicated that the DES with 1.5 wt% of MoS x /rGO additive exhibited the best lubrication performance for steel tribopair by reducing friction (∼31.2%) and wear (∼88.2%) due to the synergistic effect between the MoS x /rGO nanohybrid and DES. The superior lubricating properties of DES containing nanohybrids are primarily due to the attachment of nanohybrids to the friction interface , which triggers the formation of a robust tribofilm. These findings provide new insights into enhancing the tribological performance of DES by incorporating effective additives.
研究领域:
材料科学
·
化学工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Mingwei Hu,Jin Huang,Qizhong Li,Rong Tu,Song Zhang,Meijun Yang,Haiwen Li,Takashi Goto,Lianmeng Zhang
Earth-abundant and low-cost hydrogen evolution reaction (HER) electrocatalysts represent a future direction for achieving sustainable hydrogen energy production. Low-cost amorphous molybdenum sulfides (MoS x ), with their highly active HER activity, have emerged as outstanding catalysts for electrochemical hydrogen production. Herein, we report the development of a synergetic amorphous MoS x hybrid catalysts on V 2 O 3 with optimized HER activity of MoS x . Our synthetic and structural characterization shows that MoS x distributes on V 2 O 3 uniformly. HER-inert V 2 O 3 provides a highly electrochemically active surface area for HER and promotes electron transport . The obtained hybrid MoS x /V 2 O 3 /CC catalyst exhibits a low overpotential of 146 mV at 10 mA cm −2 toward HER under acidic conditions, which is comparable with the current advanced catalysts, and high stability with no significant changes over 10 h of electrolysis. The density functional theory calculations also demonstrate that the interface of V 2 O 3 and MoS x helps to improve the conductivity.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Hanwen Tao,Ding Ping,Yuxin Wen,Gang Wang,Xiaodan Zhang,Chuanting Fan,Wei Zhang,Jie Zhang,Zhiyong Tang
Developing robust, scalable, and cost-effective catalysts for alkaline water electrolysis (AWE) capable of withstanding intermittent renewable energy inputs is critical. Herein, we report a facile, industrially-compatible alkaline galvanostatic electrodeposition strategy to synthesize oxygen-incorporated amorphous molybdenum sulfide (MoS x ) catalysts on nickel foam, directly addressing the manufacturing gap between laboratory research and industrial fuel production. We elucidate that the alkaline environment (pH ≈ 10.16) serves a dual function: thermodynamically stabilizing the MoS 4 2− precursor against premature decomposition and facilitating the formation of a hierarchically porous, defect-rich amorphous network. This architecture synergistically integrates high-valence Mo 6+ species with abundant unsaturated S 2− active sites. Consequently, the optimized catalyst exhibits superior hydrogen evolution reaction (HER) performance, achieving a low overpotential of 59 mV at 10 mA cm −2 and a Tafel slope of 65.8 mV dec −1 , significantly outperforming potentiostatically prepared counterparts. Crucially, the electrode demonstrates exceptional resilience, maintaining >96% activity over 100 h at 200 mA cm −2 and stable voltage responses under drastic power fluctuations (0-1000 mA cm −2 ), simulating real-world renewable coupling. Post-catalytic analysis reveals a dynamic surface reconstruction mechanism driven by in-situ electron redistribution that sustains the active phase. This work provides a scalable blueprint for fabricating robust electrodes for dynamic, grid-scale hydrogen production.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
·
IF 4.084
Dawei Zhang,Lijuan Jiang,Yiyi Liu,Lijun Qiu,Jinming Zhang,Dingsheng Yuan
In order to solve the problem of large overpotential in water electrolysis for hydrogen production , transition metal sulfides are promising bifunctional electrocatalysts for hydrogen evolution reaction/oxygen evolution reaction that can significantly reduce overpotential. In this work, Ni 3 S 2 and amorphous MoS x nanorods directly grown on Ni foam (Ni 3 S 2 -MoS x /NF) were prepared via one-step solvothermal process, which were used as a high-efficient electrocatalyst for overall water splitting. The Ni 3 S 2 -MoS x /NF composite exhibits very low overpotentials of 65 and 312 mV to reach 10 mA cm −2 and 50 mA cm −2 in 1.0 M KOH for HER and OER, respectively. Besides, it exhibits a low Tafel slope (81 mV dec −1 for HER, 103 mV dec −1 for OER), high exchange current density (1.51 mA cm −2 for HER, 0.26 mA cm −2 for OER), and remarkable long-term cycle stability. This work provides new perspective for further the development of highly effective non-noble-metal materials in the energy field.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2016
·
IF 6.198
Wen-Hui Hu,Xiao Shang,Guan-Qun Han,Bin Dong,Yan-Ru Liu,Xiao Li,Yong-Ming Chai,Yun-Qi Liu,Chen-Guang Liu
A simple wet chemical method has been used to prepare MoS x in situ grown on graphene oxide (MoS x /GO) as a highly active and stable electrocatalyst for hydrogen evolution reaction (HER). The role of the oxygen-containing functional group on the surface of GO with different oxidation degrees have been studied for obtaining MoS x /GO with excellent electrochemical activity for HER. The electrochemical measurements show that MoS x /GO using the medium degree of oxidation of GO as matrix exhibits best electrocatalytic activity for HER with a small overpotential of ∼195 mV at the current density of 20 mA cm −2 . A tafel slope of ∼47.7 mV per decade is obtained for MoS x /GO modified electrode. The turnover frequency per active site is calculated. Both the amount of active sites for HER and conductivity of the electrocatalyst have been greatly improved owing to the good dispersion and conductivity provided by GO matrix. Therefore, this work suggested that choosing GO with suitable oxidation degree as support is the key for synthesizing MoS x based electrocatalysts with enhanced HER activity.
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 Cleaner Production
·
2024
·
IF 9.7
Changhan He,Juan Wang,Lijun Qu,Xueji Zhang
Mercury ions (Hg 2+ ) are one of the most physiologically toxic heavy metal ions in water. Developing adsorbents for separating and removing mercury ions from aquatic systems has important environmental and social significance. Owing to the hard-soft-acid-base interaction between mercury and sulfur (S) atoms, two-dimensional layered MoS 2 holds great promise in capture physiologically toxic Hg 2+ from water, but most S atoms are located inside the bulk MoS 2 , hindering the effective contact with mercury. Defects engineering is considered as an effective way to adjust the structure and achieve superior performance of MoS 2 . However, reasonable and fine defect modulation to enhance the mercury adsorption performance remains a challenging task. Herein, we reported that molybdenum sulfide with Mo-vacancy structure (MV-MoS x ) was fabricated via hydrothermal method and employed to uptake Hg 2+ . The results showed that this defect type significantly increased the concentration of Mo stripping defects, exposed more active S atoms, and provided MoS x with excellent adsorption performance in adsorption capacity , adsorption kinetics , distribution coefficient, selectivity and so on. In particular, MV-MoS x demonstrates a substantial actual adsorption capacity for mercury, reaching as high as 3723.3 mg/g, which is in close proximity to its theoretical adsorption capacity of 3945.95 mg/g. More importantly, a functionalized composite aerogel system based on MV-MoS x was constructed, which successfully reduced the concentration of Hg 2+ solution below the concentration permitted by drinking water standards. Our study not only provide a theoretical basis for the design of novel defect engineering, but also expand the application of transition metal sulfides in the enrichment and separation of heavy metal ions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 47
·21677-21684
·
IF 3.3
Xiaohao Jiang,Rongtao Xiao,Honggui Wang,Ya Zhang
As a high calorific and zero carbon energy source, hydrogen has received a significant amount of attention in recent years. In this work, the amorphous molybdenum sulfide was uniformly and orderly wrapped around the surface of Ni9S8/NF nanowires by electrodeposition to obtain a-MoSX@Ni9S8/NF nanoflower rods. A low overpotential of 138 mV (@10 mV cm−2) at room temperature was achieved for a-MoSX@Ni9S8/NF with a high electrochemically active surface area. An external thermal field could reduce the interfacial charge transfer resistance between the electrode and the electrolyte and promote the electrochemical hydrogen evolution reaction (HER). The a-MoSX@Ni9S8/NF showed excellent hydrogen precipitation performance of 72 mV (@10 mV cm−2) under 80 °C. The a-MoSX@Ni9S8/NF owned good reproducibility and durability after 5000 cycles in acidic media. The Faraday efficiency of the composite can reach 92.6%. This work provided a meaningful perspective on the design of electrochemical HER catalysts and external field assisted HER.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 29
·15287-15293
·
IF 8.867
Xianliang Fu,Li Zhang,Lihua Liu,Hui Li,Sugang Meng,Xiangju Ye,Shifu Chen
MoSx was successfully loaded on hexagonal CdS nanorods as a cocatalyst for the photocatalytic H2 evolution reaction (HER) by a convenient in situ photodeposition method with (NH4)2MoS4 as a precursor. The route is more effective to improve the activity of CdS than the conventional deposition methods. The optimal loading amount of MoSx was determined to be 0.2% (wt%, calculated in terms of MoS2) and the activity of the resulting sample is even higher than that of 0.2% Pt/CdS prepared by a similar photodeposition procedure. An intimate junction in the form of the Cd–S–Mo bond was suggested to account for the high HER performance. This finding opens a new avenue for the deposition and application of sulfide-based cocatalysts which have a great potential to replace noble metal cocatalysts for the photocatalytic HER.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Chong Xu,Yiqing Jiang,Jiahui Yang,Weimin Wu,Xing Qian,Linxi Hou
Box-structured nanomaterials with complicated surface texture, whose morphologies can be adjusted through changing mass ratios of reactants, are attractive in the field of electrochemical energy conversion. Herein, we report the shape-controllable synthesis of MoS 2 doped cobalt iron sulfide (Co-Fe-MoS x ) hollow nanoboxes with three different mass ratios of cobalt iron Prussian-blue-analog (Co-Fe PBA) nanocubes to (NH 4 ) 2 MoS 4 and their applications in dye-sensitized solar cells (DSSCs). As the increment of MoS 4 2− in system, the surface of Co-Fe-MoS x became rough with bushy embedded nanosheets. Benefiting from the three-dimensional nanostructure with more exposed edge sites and appropriate doped ratio, the Co-Fe-MoS x -2 hollow nanoboxes performed rough shells, well-defined interior voids, large specific surface areas and outstanding catalytic actives. By contrast, the sulfide of Co-Fe PBA (Co-Fe-S) and bare MoS 2 showed bad morphology and poor catalytic performance. It is notable that the DSSC with Co-Fe-MoS x -2 showed a much higher power conversion efficiency (PCE) of 9.63% than that of Pt based cell (8.23%) under AM 1.5G irradiation.
研究领域:
材料科学
·
能源转换
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering and Processing-Process Intensification
·
2020
·
IF 3.731
Yilin Deng,Wei Lai,Xiaoyang He,Li Xu,Bin Xu
The efficient electrochemical hydrogen evolution reaction in alkaline media through the use of earth-abundant catalysts has received significant attention, as it is a crucial means for sustainable H 2 production. Here, we present a facile synthesis approach for Ni(OH) 2 /MoS x (MoS x : amorphous molybdenum sulfide) catalyst on oxidized carbon fiber support. Carbon fibers are first oxidized by a hydrothermal treatment in a concentrated HNO 3 solution, while Ni(OH) 2 and MoS x films are consecutively deposited onto the substrate through simple electro-deposition methods from their plating solutions. Benefiting from the hydrophilicity of the oxidized carbon fiber, the abundant electrochemically reactive sites and the synergistic effect between Ni(OH) 2 and MoS x , this hybrid catalyst shows a low HER onset potential of 80 mV at 1 mA/cm 2 , an overpotential of 180 mV at 10 mA/cm 2 and a remarkable stability of at least 35 working hours at a H 2 -evolving current density of 10 mA/cm 2 without any obvious overpotential changes.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）