CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Hong Jia,Jie Wang,Wenwen Fu,Junhua Hu,Yu Liu
Metal-organic frameworks (MOFs) have been considered as the outstanding templates and precursors in synthesizing advanced cathode materials for supercapacitor. Herein, a novel hierarchical structure with hollow Co 9 S 8 polyhedrons welding on the top of MnCo 2 S 4 nanoneedles are rationally designed via a facile in-situ vulcanization approach. The unique morphology can provide more abundant reaction sites and ensure the efficient electron transport. Due to the synergistic effect between MnCo 2 S 4 and Co 9 S 8 , the hybrid electrode delivers a favorable specific capacity of 1100.5 F·g −1 at a current density of 1 A·g −1 in three-electrode system. Furthermore, an assembled asymmetric supercapacitor comprising MnCo 2 S 4 /Co 9 S 8 and activated carbon delivers a high energy density up to 45.8 W·h·kg −1 at a power density of 800 W·kg −1 . Moreover, the device holds more than 94.8% capacitance retention after 5000 cycles, demonstrating it could be a potential electroactive material for next-generation high performance energy storage device.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Ziyin Yang,Xiaohui Zheng,Jianbin Zheng
It is highly attractive to design and construct a novel enzyme-free electrode for sensitive and selective detection of hydrazine (N 2 H 4 ). In this paper, for the first time, porous MnCo 2 S 4 sphere was used as an excellent electrocatalyst for N 2 H 4 oxidation, which was synthesized through a facile hydrothermal method. The experiment results revealed that porous MnCo 2 S 4 sphere was constructed from interconnected nanoparticle with a three-dimensional porous structure. Electrochemical measurements demonstrate that the presence of MnCo 2 S 4 reduced the overpotential and accelerated kinetics of N 2 H 4 oxidation. The sensor based on porous MnCo 2 S 4 sphere exhibited an excellent performance for N 2 H 4 analysis with a wide linear range of 0.5 μM–4.78 mM, a high sensitivity of 1495.7 μA mM −1 cm −2 , a low detection limit of 0.33 μM (S/N = 3). Moreover, the application of the sensor for detection of N 2 H 4 in tap water samples was demonstrated, which indicates that MnCo 2 S 4 can be employed as the efficient material for electrochemical sensing of N 2 H 4 .
研究领域:
材料科学
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分析化学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2019
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IF 4.309
Wenhua Li,Lei He,Jing Zhang,Bin Li,Qianqiao Chen,Qin Zhong
Ternary spinel MnCo2S4 was anchored on carbon nanotubes (CNTs) via a two-step method of precursor preparation followed by ion exchange, and employed as efficient counter electrodes for quantum dot sensitized solar cells (QDSSCs). Electrochemical tests show that the interface charge transfer resistance (Rct) of MnCo2S4 is only 2.86 Ω and the Rct of MnCo2S4/CNTs further decrease to 1.09 Ω, suggesting both MnCo2S4 and its composite exhibit excellent catalytic activity for Sn2– reduction. The power conversion efficiencies of QDSSC assembled CdS/CdSe QD photoanodes with MnCo2S4 and MnCo2S4/CNTs counter electrodes reach 2.98 and 4.85%, respectively. The better photovoltaic performance of the QDSSC based on MnCo2S4/CNTs is mainly ascribed to the synergistic effect of the excellent electrocatalytic activity of MnCo2S4 itself and the conductivity of CNTs. The addition of CNTs not only significantly reduces the size of MnCo2S4 and increases catalytic activity sites, but also forms a cross-linked conductive network to accelerate the delivery of electrons. Due to the excellent reducing ability for Sn2–, MnCo2S4/CNTs is expected to be a competitive counter electrode material for efficient QDSSCs.
研究领域:
材料科学
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能源科学
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电化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL TECHNOLOGY
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2023
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IF 2.8
Kuk Chol Kim,Xiaoqiu Lin,Xiaolu Liu,Congju Li
Microbial fuel cell (MFC) is a promising technology for recovering energy in wastewater through bacterial metabolism. However, it always suffers from low power density and electron transfer efficiency, restricting the application. This study fabricated the MnCo2S4–Co4S3/bamboo charcoal (MCS-CS/BC) through an easy one-step hydrothermal method, and the material was applied to carbon felt (CF) to form high-performance MFC anode. MCS-CS/BC-CF anode exhibited lower Rct (10.1 Ω) than BC-CF (17.24 Ω) and CF anode (116.1 Ω), exhibiting higher electrochemical activity. MCS-CS/BC-CF anode promoted the electron transfer rate and resulted in enhanced power density, which was 9.27 times higher (980 mW m−2) than the bare CF (105.7 mW m−2). MCS-CS/BC-CF anode showed the best biocompatibility which attracted distinctly larger biomass (146.27 mg/μL) than CF (20 mg/μL) and BC-CF anode (20.1 mg/μL). The typical exoelectrogens (Geobacter and etc.) took dramatically higher proportion on MCS-CS/BC-CF anode (59.78%) than CF (2.99%) and BC-CF anode (26.67%). In addition, MCS-CS/BC stimulated the synergistic effect between exoelectrogens and fermentative bacteria, greatly favouring the extracellular electron transfer rate between bacteria and the anode and the power output. This study presented an efficient way of high-performance anode electrocatalyst fabrication for stimulating MFC power generation, giving suggestions for high-efficient energy recovery from wastewater.
研究领域:
环境科学
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材料科学
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生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Chao Li,Tiantian Zhao,Xiaojie Feng,Shijia Liu,Longbo Li,Ruhua Zha,Yu Zhang,Zhang Zhang
Bimetallic transition metal sulfides (TMSs) are one class of promising electrode materials that have attracted wide attention for energy storage applications. Herein, we have presented a moderate and efficient synthetic methodology to rationally design and construct hierarchical honeycomb-like manganese cobalt sulfide nanosheets (MnCo 2 S 4 NSs) as integrated cathodes for hybrid supercapacitors (HSCs). The anion-exchange process performed in the sulfidation reaction has significantly improved the electrochemical performance of the MnCo 2 S 4 NSs, resulting in a superior areal capacity of 0.837 mA h cm −2 at 3 mA cm −2 , a superb rate capability, and an admirable cycling lifespan with 92.3% of the initial capacity retained after 10,000 cycles. Moreover, MnCo 2 S 4 NSs are directly used as integrated cathode and iron oxide particles encapsulated in reduced graphene oxide (Fe 2 O 3 @rGO) is employed as the anode to assemble the HSC. The as-assembled MnCo 2 S 4 NSs//Fe 2 O 3 @rGO HSC delivers a superb energy density of 61.4 Wh kg −1 with an admirable cycling lifespan of 90.4% of capacity retention after 10,000 cycles. Besides, two HSC modules connected in series can power a homemade light-emitting diode (LED) device for 23 min, highlighting its potential practical prospects in energy storage systems.
研究领域:
材料科学
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电化学
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能源存储
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纳米材料
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功能材料
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
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2026
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IF 6.2
Tingyang Li,Qian Liu,Zheng Xiong,Peng Ji,Ruiyang Zhao,Jishu Han,Lei Wang
Hydrogen, a source of clean energy, has great potential for applications in the field of renewable energy. Developing low-cost, high-efficiency composite photocatalysts with high performance and good stability characteristics has broad application prospects. In this study, the Ni0.7Co0.3P/MnCo2S4 composite photocatalysts were prepared by the in situ deposition of Ni0.7Co0.3P nanoparticles on the surface of the MnCo2S4 yolk–shell nanoflowers derived from MnCo-layered double hydroxide. The hydrogen production performance of the photocatalysts was modified by regulating the Co-dopant amount in Ni1−xCoxP and the loading amount of Ni0.7Co0.3P. The measurements illustrated that the hydrogen generation rate of Ni0.7Co0.3P/MnCo2S4 under visible light irradiation was markedly increased and the composite photocatalyst maintained good stability. The modification of Ni0.7Co0.3P helped to enhance its light absorption capacity, thus providing more active sites. Meanwhile, the Z-scheme heterojunction formed between MnCo2S4 and Ni0.7Co0.3P could expedite the shift of photogenerated carriers, limit the recombination of photogenerated electrons and holes and contribute to H2 production. This work affords a novel approach for the development of high-performance composite photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2023
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IF 3.9
Kuk Chol Kim,Xiaoqiu Lin,Xiaolu Liu,Ling Wang,Congju Li
Microbial fuel cells (MFCs) are an efficient approach to converting energy existing in waste into electricity. However, MFCs still face problems such as low electron transfer rate and low power density. Herein, the anode properties dominate the performance of MFC. This study manufactured a high-performance MnCo 2 S 4 –CoS 1.097 /carbon black carbon felt (T-MCS-CS/CB-CF) anode through a two-step hydrothermal method . T-MCS-CS/CB catalyst exhibited superior surface roughness and mesoporous structure. Besides, the excellent electrocatalytic activity of the T-MCS-CS/CB catalyst with the heterostructure resulted in the higher power output. After biofilm formation, T-MCS-CS/CB-CF anode exhibited lower Rct (9.29 Ω) than MnCo 2 S 4 -Co 4 S 3 / carbon black carbon felt (MCS-CS/CB-CF (15.83 Ω)), carbon black carbon felt (CB-CF (29.52 Ω)) and CF anode (116.1 Ω), exhibiting higher electrochemical activity. T-MCS-CS/CB-CF anode enhanced extracellular electron transfer (EET) and improved the power density, which was 12.29 times higher (1299.27 mW/m 2 ) than the bare CF (105.70 mW/m 2 ). The relative abundance of Geobacter for T-MCS-CS/CB-CF (21.65 %) was 7.24 times higher than the control CF anode (2.99 %). Moreover, T-MCS-CS/CB modification enriched exoelectrogens/sulfate-reducing bacteria, Desulfovibrio , 4.69 % higher than the CF anode, which attributed to the introduction of CoS 1.097 . The excellent electrocatalytic activity, surface properties and biocompatibility of T-MCS-CS/CB-CF promoted the power output in MFC. This study provided an effective way of anodic electrocatalyst fabrication for enhancing the power generation of MFC.
研究领域:
环境科学
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材料科学
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生物技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2020
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IF 4.794
Xuan Wei,Hongyue Wu,Linlin Li
Obtaining high-capacity electrode materials is a key problem to be solved for high performance supercapacitors. Metal-organic frameworks derivatives have been considered to be ideal electrodes due to their large specific surface area and pore connectivity. Herein, we design a novel controllable structure, in which MnCo 2 S 4 nanorods with one-dimensional structure are inserted into three-dimensional ZIF-67 derived Co 9 S 8 hollow polyhedrons, the ratio between the two substances can be effectively regulated by controlling the reaction time. Among them, MC-3 sample shows the best performance and its capacity can reach up to 1058.0 F g −1 (146.9 mA h g −1 ) at 1 A g −1 . A supercapacitor constructed by MC-3 as the positive electrode, using activated carbon as the negative electrode, the assembled device shows a high energy density of 35.8 W h kg −1 at 750 W kg −1 . Besides, the supercapacitor also shows a steady cycling capacity of 82.1% retention after 6000 cycles. The excellent performance of the hybrid supercapacitor could envision promising applications in future high-performance energy storage devices.
研究领域:
材料科学
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能源存储与转换
✓ 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）