CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Zhaohua Jiang,Jinjin Wen,Huiting Xu,Yufen Zhang,Haonan Zhai,Zhijie Cui,Honghai Wang,Junjie Qi,Wen Liu,Jiapeng Liu
Aqueous zinc-tellurium (Zn-Te) batteries based on conversion reactions between Zn and Te have sparked significant interest due to their cost-effectiveness, high theoretical specific capacity and outstanding safety features. Nevertheless, the sluggish kinetics pose a barrier to the advancement of aqueous Zn-Te batteries. In this study, zero-dimension (0D) nanodots and three-dimensional (3D) nanoflowers molybdenum diselenide (MoSe 2 ) are in situ grown on the holey reduced graphene oxide (HrGO) by a confinement synthesis strategy. Benefiting from the simultaneous presence of (0D/3D)MoSe 2 , excellent conductivity of holey reduced graphene oxide and unique hierarchical structure, the (0D/3D)MoSe 2 @HrGO hybrid greatly promotes the redox kinetics between Zn and Te conversion. Consequently, the constructed aqueous Zn-Te batteries equipped with a Te@(0D/3D)MoSe 2 @HrGO cathode demonstrate remarkable specific capacity (reaching 505 mAh/g at a current density of 0.15 A/g) along with outstanding long-term cycling stability. Additionally, the underlying conversion mechanism has been meticulously explored through extensive analytical techniques. This research introduces an innovative approach to boost the electrochemical performance of aqueous zinc-tellurium batteries.
研究领域:
材料科学
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能源存储
·
纳米技术
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产品关联
DOI
高影响因子
Nano Research
·
2018
·Vol. 11
·期 9
·4587-4598
·
IF 7.994
Zhang Jingtong,Chen Yalan,Liu Ming,Du Kun,Zhou Yan,Li Yanpeng,Wang Zhaojie,Zhang Jun
Few-layered MoSe 2 nanosheets with mixed 1T/2H phase were successfully arrayed on a Ti substrate (forming 1T@2H-MoSe 2 /Ti) through a facile one-step solvothermal process. After testing different synthesis conditions, it was found that the optimal process involves a temperature of 200 °C and a reaction time of 12 h. Structural characterizations reveal that the morphology of 1T@2H-MoSe 2 consists of edge-terminated nanosheets with one to five layers, composed of a mixed 1T/2H phase dominated by the 1T one. The 1T@2H-MoSe 2 /Ti electrode shows excellent HER catalytic activity, with a small onset potential (−120 mV vs. reversible hydrogen electrode, RHE) and an electrode potential of only −133 mV (vs. RHE) to achieve a current density of 20 mA·cm −2 . This excellent electrocatalytic activity is due to the synergistic effects of 1T metallic phase, few-layered nanosheet morphology, and direct growth of 1T@2H-MoSe 2 on the Ti substrate. In addition, the 1T@2H-MoSe 2 /Ti electrode shows excellent stability towards long-term electrolysis. This is due to the long-term stability of the valence states of Mo and Se, as shown by post-electrolysis X-ray photoelectron spectroscopy analysis.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
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2020
·Vol. 22
·期 36
·5995-6002
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IF 3.117
Hui Zong,Le Hu,Zhenguo Wang,Ke Yu,Shijing Gong,Ziqiang Zhu
In this work, we present an interfacial superassembly by engineering MoSe2 nanoflowers coupled with ribbon-like Ti2N MXene frameworks (MoSe2@Ti2N MXene). The MoSe2@Ti2N MXene hybrids have excellent electrochemical performance and are used as anode materials for lithium-ion batteries (LIBs). Etching the Ti2AlN precursor under different conditions results in two kinds of novel materials with different morphologies: sliced etched-Ti2N and ribbon-like Ti2N MXene. Electrochemical analysis indicates that the ribbon-like Ti2N MXene frameworks not only help to avoid side reactions on carbides in LIBs, but also contribute to the outstanding rate capacity and superior specific capacity, thus achieving ultra-stable long-life cycling performance. The distinctive flower-like MoSe2 can be assembled onto the ribbon-like Ti2N MXene substrate by the interfacial superassembly. The MoSe2@Ti2N MXene electrode reveals a reversible specific capacity of 826 mAh g−1 at a current density of 0.1 A g−1 after 200 cycles. It maintains a capacity of 489 mAh g−1 after 2000 cycles at 1.0 A g−1 indicating satisfactory cycling stability. The new-type interfacial superassembly can provide a novel synthesis strategy for anode electrodes to improve the performance of LIBs.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Jing Xu,Kangle Wan,Jianjie Wu,Yunchao Wu,Wei Yan,Lichuan Zhang,Yuanping Chen,Yingcong Wei
During the piezoelectric photocatalytic process, the surface curvature of the piezoelectric photocatalyst undergoes dynamic changes under the influence of external mechanical forces. However, the correlation between the surface curvature and catalytic performance remains largely unexplored. Here, we demonstrate that decreasing the radius of curvature of MoSe2 significantly enhances its piezoelectric-photocatalytic activity for C–N coupling reactions, enabling imine synthesis from benzylamine. Comprehensive characterization and DFT calculations together show that the piezoelectric effect in the curved MoSe2 structure inhibits photogenerated charge carriers from recombination, improving carrier utilization efficiency. Additionally, the surface curvature effect induced by ultrasonic driving reduces the band gap. It promotes the effective transfer of electrons from Mo atoms in MoSe2 to −NH2 in benzylamine, thereby facilitating the activation of the benzylamine molecule. As a result, the synergistic effects of the piezoelectric and curvature characteristics significantly enhance the photocatalytic performance of MoSe2 toward the C–N coupling of benzylamine. This study not only provides new insights into interfacial reaction mechanisms in piezoelectric photocatalysis but also offers a novel perspective for designing high-performance catalytic systems.
研究领域:
材料科学
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催化化学
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理论计算
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产品关联
DOI
PubMed
高影响因子
Small
·
2023
·
IF 13.3
Yuxin Long,Qiang Li,Zidong Zhang,Qingxi Zeng,Dong Liu,Lanling Zhao,Yao Liu,Yebing Li,Yiming Zhang,Kunqian Ji,Zhaorui Zhou,Xue Han,Jun Wang
Li-O 2 batteries could deliver ultra-high theoretical energy density compared to current Li-ion batteries counterpart. The slow cathode reaction kinetics in Li-O 2 batteries, however, limits their electrocatalytic performance. To this end, MoSe 2 and Ni 0.85 Se nanoflakes were decorated in carbon hollow nanoflowers, which were served as the cathode catalysts for Li-O 2 batteries. The hexagonal Ni 0.85 Se and MoSe 2 show good structural compatibility with the same space group, resulting in a stable heterogeneous structure. The synergistic interaction of the unsaturated atoms and the built-in electric fields on the heterogeneous structure exposes abundant catalytically active sites, accelerating ion and charge transport and imparting superior electrochemical activity, including high specific capacities and stable cycling performance. More importantly, the lattice distances of the Ni 0.85 Se (101) plane and MoSe 2 (100) plane at the heterogeneous interfaces are highly matched to that of Li 2 O 2 (100) plane, facilitating epitaxial growth of Li 2 O 2 , as well as the formation and decomposition of discharge products during the cycles. This strategy of employing nonstoichiometric compounds to build heterojunctions and improve Li-O 2 battery performance is expected to be applied to other energy storage or conversion systems.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Energy
·
2022
·Vol. 16
·期 3
·483-491
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IF 2.964
Liu Yuqi,Liu Yitong,Yu Yue,Liu Chengzhan,Xing Shuangxi
Since the catalytic activity of present nickel-based synthetic selenide is still to be improved, MoSe 2 -Ni 3 Se 2 was synthesized on nickel foam (NF) (MoSe 2 -Ni 3 Se 2 /NF) by introducing a molybdenum source. After the molybdenum source was introduced, the surface of the catalyst changed from a single-phase structure to a multiphase structure. The catalyst surface with enriched active sites and the synergistic effect of MoSe 2 and Ni 3 Se 2 together enhance the hydrogen evolution reactions (HER), the oxygen evolution reactions (OER), and electrocatalytic total water splitting activity of the catalyst. The overpotential of the MoSe 2 -Ni 3 Se 2 /NF electrocatalyst is only 259 mV and 395 mV at a current density of 100 mA/cm 2 for HER and OER, respectively. MoSe 2 -Ni 3 Se 2 /NF with a two-electrode system attains a current density of 10 mA/cm 2 at 1.60 V. In addition, the overpotential of HER and OER of MoSe 2 -Ni 3 Se 2 /NF within 80000 s and the decomposition voltage of electrocatalytic total water decomposition hardly changed, showing an extremely strong stability. The improvement of MoSe 2 -Ni 3 Se 2 /NF catalytic activity is attributed to the establishment of the multi-phase structure and the optimized inoculation of the multi-component and multi-interface.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Jiamei Chen,Maolin Chen,Xing Xin,Wei Xin,Weizhen Liu,Youzhe Bao,Mengfan Ding,Peng Li,Jiangang Ma,Haiyang Xu,Yichun Liu
Bilayer transition metal chalcogenides (TMDs) have gradually attracted a great deal of attention due to the higher density of states and carrier mobility than monolayer TMDs. Controlling the uniformity of the layer number is very crucial because it will intensively influence the physical properties. However, it is difficult to synthesize equal-bilayer (EB) TMDs with two identical layers via a normal layer-by-layer strategy. Most reported bilayer TMDs are not uniform and such unequal bilayers would introduce a sizable Schottky barrier, resulting in the low carrier mobility. Here, a nucleation-etching strategy is proposed to grow EB-MoSe2 by chemical vapor deposition (CVD), which breaks the limitations of normal layer-by-layer strategy. The second layer is preferentially formed beneath the first layer rather than above, and a different etching phenomenon is also observed, which occurs more preferentially at the overlapping grain boundary sites on the top layer. The obtained EB-MoSe2 flakes are 3R-stack with high crystal quality. Furthermore, the contact between EB-MoSe2 and metal electrodes is greatly improved, thereby EB-MoSe2 transistors exhibit an order of magnitude higher carrier mobility (104 cm2 V–1 s–1) than that of UEB-MoSe2 transistors (12 cm2 V–1 s–1). This value is also at a relatively high level compared with reported results. Our work offers a feasible strategy for the synthesis of EB-TMDs with high carrier mobility, which is meaningful for developing high-performance 2D optoelectronic devices.
研究领域:
材料科学
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物理化学
✓ 已验证
DOI
高影响因子
Materials Today Communications
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2022
·
IF 3.662
Yuanbo Tan,Mingjie Yi,Zhenye Zhu,Xueting Zhang,Ke Qin,Jiaheng Zhang,Zhu Rongshu
Despiting the technological promise and environmental friendliness of sodium-ion batteries (SIBs), relatively large sizes of Na-ions and moderate oxidation-reduction response slows down their wider-spread industrial implementation. To overcome this obstacle, we developed carbon-coated MoSe 2 /MXene heterostructures , in which MXene was covered on the MoSe 2 particles and the loose carbon linked all the coated particles while providing porosity. The density-functional theory was used to understand the electronic structure of the carbon-coated MoSe 2 /MXene (MoSe 2 /Mo 2 CT x /C) and the mechanism of exchanging charge between MoSe 2 and MXene. MoSe 2 /Mo 2 CT x /C as active anode material showed exceptional stability even after 2200 cycles in SIBs. Specifically, the capacities and retention rates observed for the batteries containing MoSe 2 /Mo 2 CT x /C and cycled at 0.5, 1, and 2 A g −1 rates were equal to 652.2, 484.4, and 238.4 mAh g −1 and 102.5%, 103.9%, and 86.3%, respectively. Thus, carbon-coated MoSe 2 /MXene can be utilized as active SIB anode materials.
研究领域:
材料科学
·
能源存储技术
·
理论计算
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yi Wang,Xinyan Xiao,Jiayi Chen,Mingli Lu,Xingye Zeng
An ordered 1T/2H MoSe 2 possessed few-layers nanosheets structure was synthesized by a NaBH 4 -assisted hydrothermal method. Further, 1T/2H MoSe 2 was integrated with proton g-C 3 N 4 via solvothermal method, forming a novel 2D/2D heterostructure composite (1T/2H MoSe 2 /pg-C 3 N 4 ) with Z-scheme heterojunction. 1T/2H MoSe 2 /pg-C 3 N 4 had narrower bandgap, abundant active sites, as well as better photocurrent response and conductivity, confirmed by spectroscopic and electrochemical characterizations. Consequently, the optimal 1T/2H MoSe 2 /pg-C 3 N 4 at 1 wt% MoSe 2 loading showed enhanced TC (RhB) photodegrading rate of 92% (99%), within 80 min (45 min) of simulated solar light irradiation, being 3.0 (3.4) and 1.2 (1.2) times than that of pg-C 3 N 4 and 2H MoSe 2 /pg-C 3 N 4 , respectively. Additionally, active species trapping experiments indicated that O 2 − and h + were the main species of contaminants degradation over 1T/2H MoSe 2 /pg-C 3 N 4 . Combining with DRS, Mott-Schottky and VB XPS analysis, a reasonable 1T phase boosted Z-scheme MoSe 2 -based heterojunction mechanism was proposed.
研究领域:
材料科学
·
环境科学
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光催化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 8
·期 30
·6451-6458
·
IF 5.344
Daomeng Liu,Daquan Wang,Xunan Jing,Xiaoping Zhao,Duo Xi,Dongfeng Dang,Lingjie Meng
Nanozymes are a new generation of artificial enzymes that address the limitations of natural enzymes, with numerous reports on the development of high performance nanozymes for various applications. Herein, the phase regulation of network-like MoSe2 from the metal 1T phase to semiconductor 2H phase was achieved under different reaction conditions by a facile but efficient microwave-assisted solvothermal method. The coexisting 1T/2H-MoSe2 with edge enriched and defective nanostructures showed great enhancement of the peroxidase-like properties. This high enzymatic activity may arise from optimized active sites of 1T/2H-MoSe2, effectively leading to a rapid charge transfer within the substrate. In addition, chitosan functionalization not only greatly improves the dispersion stability of MoSe2, but also significantly increases its peroxidase-like activity, probably due to its enhanced affinity to hydrogen peroxide (H2O2). Based on these results we have established a highly sensitive colorimetric assay for the detection of H2O2 and glucose in human serum.
研究领域:
材料科学
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生物催化
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Rui Wang,Bingxin Sun,Yan Dong,Wang Zhang,Qianhui Wu,Fang Guo,Chunsheng Li,Wenting Li,Ming Chen
Conversion-type selenium cathodes are considered a highly promising alternative to sulfur cathodes due to their high conductivity and similar theoretical capacity. However, stress-diffusion and shuttle effects during the conversion process remain significant challenges that urgently need to be addressed. Herein, a composite matrix of MoSe 2 anchored on the surface of N -doped hollow mesoporous carbon nanospheres (NHMCNS) was designed as a Se host to construct Se/C cathodes (Se/MoSe 2 @NHMCNS). Anchored MoSe 2 successfully mitigated selenium loss by enhancing the chemisorption of polyselenides within the matrix. Meanwhile, polyselenides adsorbed on the Se/C cathode surface exhibit lower diffusion barriers and more negative Gibbs free energy during the conversion from chain polyselenides to Na 2 Se. MoSe 2 accelerated the catalytic conversion of polyselenides to the final discharge products from both kinetic and thermodynamic perspectives. The huge stress induced by structural transformation during the conversion process is mitigated by MoSe 2 synergistic carbon walls, which effectively maintain the structural stability of the cathode. Based on this three-in-one strategy, the sodium-selenium battery assembled with Se/MoSe 2 @NHMCNS exhibits stable cycling performance (400.6 mAh g −1 at 2C after 500 cycles), and the pouch battery also demonstrates good practical performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
An Liu,Song Gao,Shan Du,Hailin Lu,Junde Guo
Plasma electrolytic oxidation (PEO) has demonstrated significant enhancements in the mechanical properties and corrosion resistance of titanium alloys. Despite these advantages, the presence of micropores and microcracks in the coating can still detrimentally impact tribological properties. This paper introduces a novel approach involving the in-situ growth of a surface structure. The resulting interface structure exhibits outstanding tribological properties under a load of 3 N and a speed of 1.5 cm/s. In contrast to prior studies, improvements are made to the electrical parameters and electrolyte formula of Plasma electrolytic oxidation, facilitating the in-situ growth of MoSe 2 . This results in the formation of a lubricating layer and a robust TiO 2 ceramic coating with excellent adhesion. A systematic analysis of friction, wear characteristics, reveals that MoSe 2 in situ grow on the surface of the PEO coating, within micropores, microcracks, and crater structures after hydrothermal treatment. This process significantly enhances the microporous structure of the coating, with the MoSe 2 film forming a dense and uniform interlocking layer with the PEO lower layer. Dry friction test experiments demonstrate a 33.7% reduction in friction coefficient and a 29% decrease in wear rate compared to the PEO sample, indicating the synergistic effect between the MoSe 2 film and the PEO coating.
研究领域:
材料科学
·
表面工程
✓ 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）