CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Zhongjuan Wang,Li-chao Nengzi,Xinyi Zhang,Zhuanjun Zhao,Xiuwen Cheng
In recent years, sulfate radicals-based advanced oxidation process becomes an effective and common technique for elimination of emerging organic contaminants. In this study, novel NiCo 2 S 4 /CS composite was synthesized through hydrothermal method, with the physicochemical properties being characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microcopy (TEM), Brunauer-Emmett-Teller (BET) and Fourier Transform infrared spectroscopy (FT-IR). Then, NiCo 2 S 4 /CS composite acted as catalyst to activate PS for nimesulide degradation. The results showed that NiCo 2 S 4 /CS composite owned the highest activity compared with pure NiCo 2 S 4 and carbon sphere (CS), achieving 92% nimesulide degradation in 10 min with 0.1 g/L catalyst and 0.4 g/L persulfate. Furthermore, the NiCo 2 S 4 /CS membrane was fabricated by vacuum filtration, and 94% and 80% above nimesulide degradation were realized for the first time and after six times repeated experiment, which demonstrated that the catalyst was convenient to achieve recovery and reusability. In addition, the radical quenching experiment, XPS and the electrochemical methods (LSV and EIS) were measured to investigate the possible mechanism pathway, the results of which showed that both the non-radical pathway and radical pathway might attribute to nimesulide degradation, while the SO4 − remained the dominant species. This research provided a novel sulfide NiCo 2 S 4 /CS membrane for the oxidative technique for emerging organic contaminants in water treatment.
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高影响因子
DESALINATION
·
2024
·
IF 8.3
Jiapeng Wang,Hua-Bin Yuan,Yongxuan Xiang,Lili Xing,Xinpeng Chen,Yifeng Wang,Jiazhuang Chen,Guoqiang Chen,Tieling Xing
Oxygen evolution reaction (OER), as a half-reaction of water decomposition, has a high theoretical overpotential. Therefore, the development of electrocatalysts with high OER performance is favorable for electrolytic hydrogen production. In situ growth of nanomaterials on conductive substrates is an effective strategy for the preparation of electrocatalysts. In this work, we grew Ni/Co bimetallic metal-organic framework (MOF) on carbon cloth substrates and successfully constructed a robust NiCo 2 S 4 /FeS@CC electrocatalyst through a MOF derivatization strategy. This electrocatalyst can be used for efficient and robust OER performance. MOF-derived NiCo 2 S 4 /FeS has the advantage of a porous heterostructure and multicomponent with many active sites and faster charge transfer rate, while sulfur doping greatly improves the OER performance. The current density of this self-supported heterogeneous material in alkaline freshwater reaches up to 10 mA cm −2 with an overpotential of only 238 mV. NiCo 2 S 4 /FeS@CC exhibited good OER performance in alkaline brine with an overpotential of only 241 mV at 10 mA cm −2 . We speculate that this is due to the generation of a negatively charged SO 4 2− anionic layer on the catalyst surface during the electrooxidation process, which effectively avoids Cl − corrosion. And both conditions demonstrate excellent long time stability. Additionally, we succeeded in further reducing the onset potential and energy consumption by adding ethanol or methanol to the electrolyte. This work provides an effective method to improve the OER performance of MOF-derived transition metal electrocatalysts for hydrogen production from electrolytic water.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Juan Xia,Chengying Yang,Mengdie Wang,Chenchen Liu,Dan Zheng,Ping Han,Xu Sun,Hanlin Wu,Qi Wang
NiCo 2 S 4 has garnered significant attention in biochemical analysis as an enzyme mimic due to its peroxidase-like activity. However, its catalytic properties have not been fully explored, limiting its application, particularly in biomedical diagnostics for low-abundance biomolecules. The catalytic activity of nanozymes is closely linked to their interface structure, and sulfur vacancies (SVs) have shown considerable promise in enhancing nanozyme activity. In this work, we synthesized SVs-NiCo 2 S 4 with a flower-like structure and NiCo 2 S 4 with a sphere-like structure with varying SV concentrations by modulating the reaction solvent, utilizing the NiCo-glycerate metal-organic framework as a template. The SVs-NiCo 2 S 4 demonstrated a remarkable catalytic efficiency of 3.85 times higher than NiCo 2 S 4 with fewer SVs. This nanozyme effectively facilitated the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in H 2 O 2 , leading to a strong color response. Density functional theory (DFT) calculations and hydroxyl radicals (·OH) detection confirmed that the enhanced peroxidase-mimicking activity of SVs-NiCo 2 S 4 was attributed to its efficient adsorption of H 2 O 2 and subsequent decomposition into ·OH on the SVs sites of SVs-NiCo 2 S 4 . Based on these findings, we developed an enhanced colorimetric detection method for glutathione (GSH) utilizing the peroxidase-mimicking properties of SVs-NiCo 2 S 4 . Compared to NiCo 2 S 4 , SVs-NiCo 2 S 4 exhibited greater sensitivity for GSH detection, with a linear range spanning six orders of magnitude from 5 nM to 50 nM and 70 nM to 130 μM, alongside a detection limit of 1.55 nM. A deeper understanding of the mechanisms underlying the SVs can provide valuable insights for developing high-performance nanozymes and biosensors, thereby expanding the potential applications of NiCo 2 S 4 in biosensing and medical diagnostics.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Fangshuo Jia,Yujuan Zhang,Xiaolong Ma,Zihao Zheng,Fuqiang An,Tuoping Hu
Water electrolysis coupling methanol oxidation is an energy-efficient hydrogen generation technology, while obtaining high-value formic acid, however, superior catalysts are often required to achieve efficient hydrogen production. Herein, the n - n heterojunction (NiCo 2 S 4 -MoS 2 ) composed of NiCo 2 S 4 nanoparticles uniformly dispersed on ultrathin MoS 2 nanosheet arrays has been prepared through hydrothermal-pyrolysis process. At a current density (j) of 10 mA cm −2 , the potentials of NiCo 2 S 4 -MoS 2 for methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) are respectively 1.282 V and −36 mV with very high selectivity for formic acid. Importantly, under the same conditions, by using the n - n heterojunction as electrodes, the voltage (1.355 V) of the methanol electrolysis is 216 mV lower than that of the water electrolysis. Meanwhile, at higher j of 100 mA cm −2 , the voltage of the methanol electrolysis is only 6.8 % higher than the original after 150 h chronopotentiometry (CP) test. The outstanding performance of NiCo 2 S 4 -MoS 2 exceeds that previously reported in most literature, which is primarily attributed to the fact that the built-in electric field (BEF) derived from the Fermi level (E F ) difference between NiCo 2 S 4 and MoS 2 , accelerates the charge transfer, optimizes the electronic structure of the heterojunctions, and thus improving the electrical conductivity. Furthermore, MoS 2 nanosheet arrays with large specific surface area provide a fast charge/mass transfer channel, uniformly dispersed NiCo 2 S 4 and defect sites produce abundant active sites. And the superior hydrophilicity and aerophobicity of the heterojunction surface accelerate the reaction kinetics. Finally, density functional theory (DFT) calculations show that the formation of the heterojunction optimizes the electron density and d-band center of composites, thus enhancing H* adsorption and CH 3 OH dehydrogenation kinetics.
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高影响因子
IONICS
·
2020
·Vol. 27
·期 1
·305-314
·
IF 2.394
He Yi,Liu Lijuan,Tao Shihan,Ye Jing,Wu Jun,Xu Cuiying,Guo Qiaohui
NiCo 2 S 4 nanostructures have been intensively investigated as supercapacitor electrode materials ascribing to its high conductivity and capacity. However, NiCo 2 S 4 -based electrodes suffer inferior cycling durability owing to its structural degradation during the redox process. Herein, NiCo 2 S 4 nanoneedles anchored on the graphitic carbon nanofiber mat (NiCo 2 S 4 /GCN) are synthesized via a two-pot hydrothermal method. The NiCo 2 S 4 /GCN composed of highly conductive graphitic carbon nanofiber (GCN) frameworks ensures the uniform dispersion of NiCo 2 S 4 and accelerate electron/ion transport, and NiCo 2 S 4 with porous and hollow nanostructure facilitates the diffusion of electrolyte. The NiCo 2 S 4 /GCN electrode reveals a high-energy storage capability (1775.2 F g −1 at 10 A g −1 ) and an amazing rate retention (1510.2 F g −1 at 50 A g −1 ). Furthermore, the NiCo 2 S 4 /GCN//active carbon device displays a superior energy density (52.3 W h kg −1 at 358.0 W kg −1 ) and preeminent cycle life (retention 94.7% after 10,000 cycles at 5 A g −1 ), suggesting a promising candidate in supercapacitor applications.
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高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Lan Sun,Tao Wang,Long Zhang,Yunjin Sun,Kewei Xu,Zhengfei Dai,Fei Ma
The rational design and preparation of earth-abundant, stable and efficient electrocatalysts for hydrogen production is currently the subject in extensive scientific and technological researches toward the future of a clean-energy society. Herein, a mace-like MoS 2 /NiCo 2 S 4 hierarchical structure is designed and synthesized on carbon fiber paper via a facile hydrothermal method , and evaluated as electrocatalyst for hydrogen evolution reaction . In the MoS 2 /NiCo 2 S 4 /carbon fiber paper hierarchical structures, MoS 2 nanosheets are dispersively distributed on the surface of NiCo 2 S 4 nanowires, which provides an enlarged surface area , abundant interfaces and catalytic active sites. As for hydrogen evolution reaction , such MoS 2 /NiCo 2 S 4 /carbon fiber paper heterostructures give rise to a hydrogen evolution reaction catalytic current density of 10 mA cm −2 with a lower overpotential of 139 mV and a smaller Tafel slope of 37 mV·dec −1 than those of MoS 2 /carbon fiber paper and NiCo 2 S 4 /carbon fiber paper counterparts, exhibiting a prominent electrocatalytic performance. Moreover, the electrocatalytic properties change little after 5000 CV cycles and continual electrolysis for 12 h without obvious decay, respectively, demonstrating high durability and stability. The excellent hydrogen evolution reaction performances endow the hierarchical configuration MoS 2 /NiCo 2 S 4 /carbon fiber paper with promising alternative in HER and other related renewable energy fields.
研究领域:
材料科学
·
能源化学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Hongya Liu,Yaoting Zhao,Guihang Yu,Xiujuan Lin,Shifeng Huang
With the growing demand for integrating energy storage into building materials, all-solid-state cement-based hybrid battery-capacitors (AC-HBCs) have emerged as a promising candidate due to their low cost and high safety. In this study, spherical NiCo 2 S 4 powder is synthesized via a hydrothermal method and fabricated into a NiCo 2 S 4 /nickel foam electrode, which delivers a high area capacity of 280.56 μAh·cm −2 at 0.2 mA·cm −2 . Asymmetric AC-HBCs are assembled using this electrode and a cement-6% PAA composite electrolyte. By optimizing the moisture content to tailor the pore structure of the electrolyte, a high ionic conductivity of 16.22 mS·cm −1 is achieved. The optimized device, PC-5, can operate at a notably high power density of 435.14 μW·cm −2 while delivering an energy density of 18.49 μWh·cm −2 . It also achieves a maximum area capacity of 42.50 μAh·cm −2 and demonstrates excellent stability, maintaining a coulombic efficiency above 98% over 3000 cycles. The device demonstrates practical viability by powering a small bulb and an electronic clock. This work provides a new avenue for applying cement-based hybrid battery-capacitors in civil engineering.
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高影响因子
LANGMUIR
·
2026
·
IF 4.4
Kuanhong Cao,Yongzhuang Lu,Xiaoxu Zhang,Yuying Jia,Xiangyu Cai,Yanfu Huan,Feng Tang,Lei Yu
Abstract The development of cost-effective, high-performance electrocatalysts for the alkaline hydrogen evolution reaction is imperative for sustainable hydrogen production via water electrolysis. However, the intrinsically sluggish reaction kinetics and insufficient exposed active sites of transition metal sulfides remain critical bottlenecks. Herein, we report the facile hydrothermal synthesis of binder-free, three-dimensional NiCo2S4/MoS2 heterostructured nanoflakes directly grown on nickel foam as a highly efficient electrocatalyst for alkaline hydrogen evolution. Benefiting from the synergistic effects between NiCo2S4 and MoS2, which provide abundant active edge sites, enhanced electrical conductivity, and reinforced structural stability, the as-prepared NiCo2S4/MoS2 electrode exhibits excellent activity in alkaline media, requiring an ultralow overpotential of only 112 mV to achieve a current density of 10 mA cm–2. Moreover, the electrode demonstrates remarkable long-term durability. The superior hydrogen evolution performance originates from the rational integration of NiCo2S4 and MoS2 within the unique heterostructure, offering a promising strategy for designing other robust transition metal sulfide-based electrocatalysts.
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高影响因子
Nanoscale
·
2020
·Vol. 12
·期 43
·22330-22339
·
IF 6.895
Pengfei Liu,Yuanyuan Liu,Jing Li,Meiri Wang,Hongtao Cui
The microstructure of electrode materials and its synergism with current collectors have been a research focus in the area of Faraday supercapacitors (FSs), while the microstructure of current collectors has been neglected in most cases. To eliminate the electrochemical bottleneck of FSs, the comprehensive consideration on electrodes should simultaneously include both the microstructures of materials and current collectors, and their synergism. In this work, a dual nanostructure of NiCo2S4/nickel foam is built to achieve an electrode with structure-synergistical contribution from materials and current collectors. The as-built electrode presents an ultra-high rate capacity (1223.8 C g−1 at 2.5 A g−1; 53.40% capacity retention at an ultra-high current density of 148.5 A g−1) and excellent cycling stability (94.56% capacity retention after 10 000 charge–discharge cycles). The as-assembled asymmetrical supercapacitors show both high energy and power densities (76.7 W h kg−1 at 425.7 W kg−1; 41.9 W h kg−1 at 10 643.3 W kg−1). These results demonstrate that the dual nanostructure of the electrode is valuable for achieving high performance supercapacitors.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Kai Peng,Narayanamoorthy Bhuvanendran,Fen Qiao,Guangping Lei,Sae Youn Lee,Huaneng Su
The rational design of advanced transition-metal-based electrocatalysts with a heterostructure is a promising strategy for the promotion of the urea oxidation reaction (UOR) for energy-conservation technologies, but achieving a sufficiently high performance remains a challenge. In this work, we report a dramatic improvement in the UOR performance of a heterostructured electrocatalyst that combines NiMn-layered double hydroxide (LDH) nanosheets with NiCo2S4 arrays via a series of facile hydrothermal fabrication steps. Due to the high-flux electron transfer pathways at the close-contact interface, abundant active sites, and unique three-dimensional (3D) architecture, the NiCo2S4@NiMn LDH heterostructure grown on nickel foam exhibits a low potential of 1.37 V at a current density of 100 mA·cm–2 and a low Tafel slope of 43.8 mV·dec–1. More impressively, the proposed electrocatalyst demonstrates robust stability of more than 25 h at a current density of 50 mA·cm–2 with a negligible decrease in activity. In addition, density functional theory calculations reveal that the interface engineering within the heterostructure is beneficial for the adsorption and activation of urea molecules and the improvement of the sluggish UOR dynamics. The dissociation of adsorbed CO(NH2)2* into CO* and NH* intermediates on the heterostructured NiMn LDH is also facilitated by electronic coupling with NiCo2S4, resulting in superior UOR performance.
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高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 3
·1-7
·
IF 5.705
Dai Hongxiu,Chen Duo,Li Yuan,Cao Pengfei,Wang Nan,Lin Meng
An array consisting of homogeneous NiCo 2 S 4 hollow core-shell nanoneedles was fabricated and is shown to enable sensitive electrochemical determination of dopamine (DA). The array was grown directly on a nickel foam (NF) substrate by a two-step hydrothermal process. The hierarchical nanoarray consists of a homogeneous NiCo 2 S 4 nanoneedle core and a NiCo 2 S 4 nanosheet shell. A 3-dimensional micro/nano structure is formed due to the presence of the micropores of the NF. The electrode was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Compared to a plain NF electrode, the NiCo 2 S 4 -modified NF electrode displays higher electrocatalytic activity for the oxidation of DA by differential pulse voltammetry (DPV). The sensor, best operated at a typical working voltage of 134 mV (vs. saturated calomel electrode), has a linear response in the 0.5–100 μM DA concentration range and a 0.2 μM detection limit (at S/ N = 3). The electrode is selective over ascorbic acid and uric acid.
Schematic presentation of an electrochemical sensor for selective determination of dopamine based on the use of a homogeneous NiCo 2 S 4 hollow core-shell nanoneedle array on nickel foam.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xuebin Lu,Zhengya Gong,Zhihao Yu,Jian Xiong,Gaixiu Yang,Mengyan Guo,Yuxin Zhang,Yiming Li
Supercapacitors as one of the new energy storage devices have attracted much attention from researchers. The design and preparation of new electrode materials with high conductivity and energy density has become a frontier and key issue in the research of supercapacitor performance improvement. In addition, flow capacitor deionization (FCDI) relying on the working principle of supercapacitors is a promising technology for desalination and has received crucial attention. NiCo 2 S 4 (NCS) is a promising pseudocapacitive material with high electrical conductivity and ideal stability. In this study, sea urchin-like NiCo 2 S 4 electrode materials (CC@NCS) grown in situ on crab shell carbon (CC) were prepared by a simple molten salt-assisted hydrothermal two-step method. The composite successfully combined the properties of CC and NiCo 2 S 4 . The prepared material exhibited excellent electrochemical properties and energy storage performance. In the three-electrode system, the specific capacitance is up to 692.4 F/g at a current density of 0.5 A/g. Asymmetric supercapacitors assembled with CC as the negative electrode, CC@NCS as the positive electrode, and 3 M KOH as the electrolyte obtained high specific capacitance (0.5 A/g, 163.6 F/g) and high energy density (305.16 W/kg, 8.18 Wh/kg). The device also showed excellent cycling performance in the long cycle test (88.65 % retention after 5000 cycles). In addition, the FCDI device with this material as the flow electrode achieved a final conductivity of 15.16 μS/cm by electrosorption of a 1000 mg/L NaCl solution at a constant pressure of 1.2 V for 60 min along with an impressive average salt removal rate (0.0621 mg/cm 2 ·min −1 ) and charge efficiency value (90.79 %), and a low energy consumption value (0.02 kWh/mol). What's more, it also exhibited excellent desalination properties. This indicates that the composite is a promising active material for energy storage and desalination.
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高影响因子
危险品化学品经营许可证（带存储）