CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Pengfei Wan,Xincheng Guo,Shengdong Jing,Shilan Li,Shengjun Lu,Yufei Zhang,Haosen Fan
Lithium-sulfur (Li-S) batteries present tremendous potential in promising high energy storage systems because of their high energy density and specific capacity. However, the shuttle effect and slow reaction kinetics of the intermediate lithium polysulfide (LiPSs) result in fast capacity fading. Herein, multicomponent synergy nitrogen-doped carbon nanotube (CNT) framework dotted by CoFe/FeN 0.0324 /TiN heterostructure (CoFe/FeN 0.0324 /TiN@N-CNT) were developed and prepared by in-situ nitridation approach as polysulfide mediator to simultaneously realize physicochemical adsorption and catalytic conversion of polysulfide. Transition metal nitrides, such as FeN 0.0324 , are known for their polar surfaces that can chemically adsorb polysulfides efficiently. Additionally, CoFe and TiN have been shown to catalyze polysulfide redox reactions. This understanding paves the way for the development of heterostructured CoFe/FeN 0.0324 /TiN nanoparticles that significantly enhance the immobilization, diffusion, and transformation of polysulfides. Moreover, nitrogen-doped carbon nanotubes (CNTs) decorated with bimetallic CoFe afford intriguing benefits. The CoFe alloy not only facilitates the in-situ growth of CNTs but also contributes to prominent Li + /electron conductivity. Together, CoFe and CNTs provide substantial physical confinement and catalytic sites, thereby accelerating redox kinetics and effectively mitigating the shuttle effect. Owing to these advantages, CoFe/FeN 0.0324 /TiN@N-CNT separators exhibit remarkable electrochemical properties including superior rate capacity of 738 mAh g −1 at 3C, high reversible capacity of 708 mAh g −1 at 0.5C after 400 cycles and 607 mAh g −1 at 1C after 1000 cycles with per cycle declining rate of 0.09 % and 0.048 %, respectively, and ultralong cycle life at 4C after 1000 cycle. Even with a relatively high sulfur loading of 2.3 mg, the modified batteries still exhibit a satisfactory reversible capacity at 0.5C. This work paves a unique avenue combined prudent spacial framework with heterogeneous synergy strategy for manufacturing high-energy–density Li-S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Chenlu Wang,Xiaojiang Hou,Duode Zhao,Danting Li,Xinlei Xie,Peixuan Zhu,Xiaohui Ye,Guoquan Suo,Guang Yang,Yanling Yang
Magnesium-based solid hydrogen storage technology is anticipated to enhance the extensive utilization of hydrogen energy due to its secure and reversible hydrogen storage characteristics. Nonetheless, the intrinsic high Mg–H bond energy and surface dissociation energy of MgH 2 result in severe operating conditions and reduced efficiency. This work proposes a NiFe/CoFe nanocatalyst exhibiting a dual-site multichannel effect, which is incorporated into MgH 2 for surface catalysis using a brief high-energy ball milling technique. The surface-catalyzed composites can release over 90 % of the potential hydrogen storage capacity with a single activation. The MgH 2 -10 wt%NiFe/CoFe composite can absorb 4.88 wt% of H 2 at 150 °C. The release peak temperature of H 2 of MgH 2 -5wt.%NiFe/CoFe was markedly decreased to 281.01 °C, representing a reduction of 162.6 °C relative to ball milled state MgH 2 (BM-MgH 2 ). The Ea for dehydrogenation was markedly decreased to 71 kJ/mol, attributed to the dual-site adsorption of NiFe/CoFe catalysts and the multi-channel diffusion within the multiphase system. These factors facilitate the absorption and dissociation of H-atoms, thereby enhancing the kinetic properties of MgH 2 . This study provides valuable insights for designing multicomponent composite metal nano-catalysts and the advancement of MgH 2 hydrogen storage composites.
研究领域:
材料科学
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能源储存技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fei Li,Zhuonan Huang,Yuqi Wang,Le Wu,Sinan Guan,Yue Wang,Ying Liu,Shuang Cheng,Jinlei Wu,Jun Hu,Xin Ding
Magnesium hydride (MgH 2 ) has garnered substantial consideration mainly due to its high gravimetric density and reliable resource, whereas its poor thermodynamics and kinetics for absorbing/releasing hydrogen restricts the largescale application. Certain catalysts have demonstrated remarkable activity in enhancing the hydrogen storage capabilities of MgH 2 . In this work, the nanoparticle-cumulated flower-like CoFe@C coated catalysts (denoted as CoFe@C) are controllably synthesized as expected by the MOF (Metal-Organic Farmwork) in-suit decomposition method at 800 °C, which exhibits an average pore size of 18.63 nm. Meanwhile, the particle size for the as-prepared CoFe alloy coated in carbon layer are approximately 10–20 nm, and the as-prepared samples are introduced to promote the de/rehydrogenation properties of MgH 2 at relatively lower temperatures. Due to the synergistic interaction of CoFe alloy nanoparticles serving as active sites and agglomeration resistance of carbon layers, the MgH 2 composites doped with CoFe@C-800 could initialize its decomposition process at 175.9 °C, and may desorb 6.0 wt% H 2 at 300 °C in 400 s. Additionally, the peak temperature and apparent activation energy during dehydrogenation decline significantly (with 35 % and 38 %, respectively). Furthermore, theoretical analysis results indicate a higher catalytic activity for the carbon-coated CoFe alloy owing to the synergetic effect between CoFe nanocomposite & carbon layer, which can facilitate the bond extension and strength decrease of Mg-H bonding. In brief, using MOF may derive transition metal and carbon layer, which could be a promising approach to stimulating the hydrogen storage properties of MgH 2 .
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Luning Sun,Ruixue Liu,Yizhi Ma,Wei Wang,Yunxiang Yuan,Hongchao Zhang,Sainan Wei,Wei Liang
Near-infrared (NIR) laser countermeasures firing systems and electromagnetic wave shielding are extremely important in military warfare. Herein, a series of biomass-derived carbon flexible textiles with NIR photothermal conversion and microwave absorption capabilities were created by pyrolysis at temperatures ranging from 700 to 1000 °C. A hydrothermal approach was employed to create 2D CoFe-layered double hydroxides (CoFe-LDH), whose positively charged characteristics were securely attached to the hydroxide clusters on the surface of cotton fibers via electrostatic interaction . Subsequently, the adjustable layer spacing of LDH provides ideal in situ growth sites for metal ions and organic ligands of Co MOF . CoFe-LDH@Co MOF@PDMS cotton-derived carbon textiles (CoFe@PCCF) were successfully made using high-temperature pyrolysis, annealed carbonization , and polydimethylsiloxane curing. The intrinsic light absorption of the interwoven and entangled carbon fibers, combined with the plasmonic resonance of its surface metal particles, promotes photothermal conversion of the material, reduces density, and increases absorption during multiple reflections of electromagnetic waves. Furthermore, its qualities can be optimized and modified by modifying parameters like as carbonization temperature and thickness. As a result, CoFe@PCCF-900 shows the minimum reflection loss (RL min ) of −23.03 dB at 1.6 mm thickness and an effective absorption bandwidth (EAB) of 4.53 GHz. The surface temperature of CoFe@PCCF-1000 reaches 74.5 ℃ after 3 seconds of NIR (980 nm, 200 mW) light, indicating quick and stable photothermal conversion. This work provides an opportunity for laser shooting and electromagnetic attenuation low-cost materials.
研究领域:
材料科学
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光学工程
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Guoying Yang,Yijin Song,Songde Han,Zhen-Zhen Xue,De-Xuan Liu,Ani Wang,Guoming Wang
Assembling a heterostructure is an effective strategy for enhancing the electrocatalytic activity of hybrid materials. Herein, CoFe-layered double hydroxide and Co-metal–organic framework (CoFe-LDH/Co-MOF) hollow heterostructure nanorod arrays are synthesized. First, [Co(DIPL)(H3BTC)(H2O)2]n [named as Co-MOF, DIPL = 2,6-di(pyrid-4-yl)-4-phenylpyridine, H3BTC = 1,3,5-benzenetricarboxylic acid] crystalline materials with a uniform hollow structure were prepared on the nickel foam. The CoFe-LDH/Co-MOF composite perfectly inherits the original hollow nanorod array morphology after the subsequent electrodeposition process. Optimized CoFe-LDH/Co-MOF hollow heterostructure nanorod arrays display excellent performance in oxygen evolution reaction (OER) with ultralow overpotentials of 215 mV to deliver current densities of 10 mA cm–2 and maintain the electrocatalytic activity for a duration as long as 220 h, ranking it one of the non-noble metal-based electrocatalysts for OER. Density functional theory calculations validate the reduction in free energy for the rate-determining step by the synergistic effect of Co-MOF and CoFe-LDH, with the increased charge density and noticeable electron transfer at the Co–O site, which highlights the capability of Co-MOF to finely adjust the electronic structure and facilitate the creation of active sites. This work establishes an experimental and theoretical basis for promoting efficient water splitting through the design of heterostructures in catalysts.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
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IF 4.3
Yuanqian Xiong,Dong Zhang,Cuizhu Ye,Yu Wang,Xiangrui Deng,Danwen Deng,Chunhong Xiong,Jinsheng Zhang,Qianhui Gu,Ganhui Huang
Ciprofloxacin hydrochloride is widely used to treat animal diseases. However, its chronic abuse has caused severe accumulation in animal-derived foods , which has seriously damaged human health. Thus, in this study, a novel molecularly imprinted electrochemical sensor (MIES) was designed for selective and ultra-sensitive detection of ciprofloxacin hydrochloride (CPFX) in milk. The sensor was based on the molecularly imprinted polymers (MIPs) synthesized with poly-pyrrole (PPy) as the functional monomer , AuNPs and S-CoFe-MOFs (CoFe-Metal organic frameworks coated with chitosan) as the Supporting materials , and CPFX as the template molecule. The electrochemical behavior of MIPs/S-CoFe-MOFs/AuNPs/GCE was studied by several electrochemical methods, which showed a wider detection linear range (0.05 ∼ 500 ng·mL -1 ) and lower detection limit (0.0033 ng·mL -1 ) than those in previous reports. The optimization of experiments confirmed the good selectivity and stability of the sensors----- with the milk sample recovery of 89.04∼110.26%, and the relative standard deviations (RSD) of less than 5.5%, which was close to HPLC. In conclusion, the sensor we constructed has a high selectivity and stability potential in detecting CPFX in milk.
研究领域:
食品科学
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分析化学
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生物医学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 8
·1-13
·
IF 5.3
Xu Ruijie,Liu Zhenkang,Kong Zhibo,Ma Xinyu,Peng Xiaolun,Wang Yazhen
CoFe@C was first prepared by calcining the precursor of CoFe-metal–organic framework-74 (CoFe-MOF-74), then an electrochemical sensor for the determination of neohesperidin dihydrochalcone (NHDC) was constructed, which was stemmed from the novel CoFe@C/Nafion composite film modified glassy carbon electrode (GCE). The CoFe@C/Nafion composite was verified by field-emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Electrochemical impedance spectroscopy (EIS) was used to evaluate its electrical properties as a modified material for an electrochemical sensor. Compared with CoFe-MOF-74 precursor modified electrode, CoFe@C/Nafion electrode exhibited a great synergic catalytic effect and extremely increased the oxidation peak signal of NHDC. The effects of various experimental conditions on the oxidation of NHDC were investigated and the calibration plot was tested. The results bespoken that CoFe@C/Nafion GCE has good reproducibility and anti-interference under the optimal experimental conditions. In addition, the differential pulse current response of NHDC was linear with its concentration within the range 0.08 ~ 20 µmol/L, and the linear regression coefficient was 0.9957. The detection limit was as low as 14.2 nmol/L (S/N = 3). In order to further verify the feasibility of the method, it was successfully used to determine the content of NHDC in Chinese medicine, with a satisfactory result, good in accordance with that of high performance liquid chromatography (HPLC). Graphical Abstract
研究领域:
分析化学
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材料科学
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药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Cuizhu Ye,Xingguang Chen,Dong Zhang,Junjun Xu,Huiting Xi,Tiantian Wu,Danwen Deng,Chunhong Xiong,Jinsheng Zhang,Ganhui Huang
Coated with polypyrrole (Ppy)-based molecularly imprinted polymer (MIP), 3D CoFe-metal organic frameworks (CoFe-MOFs) with gold nanoparticles (AuNPs) was developed for electrochemical trace detection of norfloxacin (NOR). On one hand, the trace detection of NOR was realized with MIP/CoFe-MOFs/AuNPs/Glassy carbon electrode (GCE). The effective surface area of the imprinted cavities capable of identifying NOR on MIP/CoFe-MOFs/AuNPs/GCE increased to 0.1058 cm 2 after 3D CoFe-MOFs/AuNPs was modified, which indicates that CoFe-MOFs/AuNPs could generate more imprinted cavities, thus contributing to a lower limit of detection (LOD) of 0.131 pmol L −1 (S/N = 3) with a wider linear range (5–100, 100–1000 and 1000–6000 pmol L −1 ). On the other hand, the recognition reaction to NOR by MIP/CoFe-MOFs/AuNPs/GCE is an irreversible electrochemical oxidation reaction involving an electron and a proton, controlled by a mixed adsorption-diffusion mechanism. Rapid and precise detection of NOR in prescription (norfloxacin capsules with the specification of 0.1 g) and pure milk with the recovery rates between 97.04 and 110.2% and the relative standard deviations (RSD) were less than 5.7%. The measured results by MIP/CoFe-MOFs/AuNPs/GCE were close to the commercial norfloxacin enzyme-linked immunosorbent assay (ELISA) kit, demonstrates its high potential to NOR trace detection in environmental and animal foods.
研究领域:
分析化学
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电化学
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材料科学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 8
·2024-2033
·
IF 7.2
Yang Liming,Cao Yuanbo,Wang Linsong,Yang Tao,Wang Kang,Wang Enhui,Yu Xiangtao,Wang Hongyang,Chou Kuo-Chih,Hou Xinmei
CoFe bimetallic hydroxides (CoFe BMHs) find wide applications as excellent catalysts in the field of water splitting. However, no study has systematically investigated the influence of the morphologies of CoFe BMHs on catalyst performance. In this study, CoFe BMH nanoflowers (CoFe BMH NFs), CoFe BMH nanosheets (CoFe BMH NSHs), CoFe BMH nanorods (CoFe BMH NRs), and CoFe BMH nanospheres (CoFe BMH NSPs) were prepared on nickel foam via a hydrothermal method. CoFe BMH NSHs exhibited the most beneficial catalytic activity. At a current density of 100 mA·cm −2 , its overpotential for oxygen evolution reaction (OER) was 282 mV, and the overall water splitting voltage was 2.05 V. The double-layer charging capacitance ( C dl ) value of CoFe BMH NSHs was the largest in CoFe BMHs, which proves that CoFe BMH NSHs have the largest active area. Furthermore, the active site in the OER process was metal oxyhydroxide (MOOH) through in situ Raman characterization, and the generation of the active substance was an irreversible process. This work provides important insights into the design of catalyst morphologies and offers valuable guidelines for the enhancement of the performance of other catalysts.
研究领域:
催化
·
材料科学
·
电化学
·
纳米技术
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hongchun Yu,Maomao He,Zhuo Wang,Feng Han,Yongze Cao,Runze Han,Yang He,Shanshan Li,Yusha Lan,Luran Zhang
Carbon-based magnetic composites derived from metal-organic frameworks (MOFs) have emerged as promising candidates for electromagnetic wave absorption. In this study, graded structured spherical cobalt-iron/carbon (CoFe/C) composites were fabricated via a stepwise in-situ pyrolysis strategy using bimetallic CoFe-MOF precursors. The composite pyrolyzed at 700 ℃ exhibits exceptional microwave absorption properties: it achieves a minimum reflection loss (RL) of −80.3 dB at 9.68 GHz with a 3.00 mm thickness, along with an effective absorption bandwidth (EAB, RL < −10 dB) of 4.8 GHz (7.9–12.7 GHz), fully covering the entire X-band. Notably, when the thickness decreases to 2.20 mm, the EAB expands to 6.7 GHz (11.3–18.0 GHz), spanning the complete Ku-band. Mechanistic analysis reveals that the superior performance arises from two critical factors: optimized impedance matching enabled by synergistic dielectric and magnetic loss mechanisms, and intensified electromagnetic wave scattering through the graded spherical architecture. This work provides a scalable synthesis protocol for bimetallic composites while demonstrating a rational design strategy for high-performance broadband microwave absorbers.
研究领域:
材料科学
·
电磁学
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纳米技术
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huiyu Yi,Chenge Liang,Yungui Li,Haoran Niu,Suorong Zhang,Moudong Hu,Wenhai Huang,Qile Fang
Prussian blue analogs (PBAs) are promising catalysts in heterogeneous oxidation processes. The catalytic activity of PBAs relies on exposed crystal facets and accessible active sites on the PBA framework. Employing a heteroatom doping strategy using a rare earth element (La), we regulated the crystal structure and optimized the catalytic activity of CoFe PBA for peroxymonosulfate (PMS)-driven degradation of the antibiotic norfloxacin (NOR). The La atoms were mainly doped in the interstitial sites of the CoFe PBA cubic lattices, without affecting the electron distributions of Co and Fe metals or the face-centered cubic crystal phase of the coordination skeleton. La doping dominated the (1 1 1) and (1 0 0) as the main exposed facets of CoFeLa PBA, increasing the affinity of CoFeLa PBAs for PMS adsorption due to the higher surface energy of the two facets. Consequently, the activation energy considerably declined from 77.57 kJ/mol in CoFe PBA to 51.66 kJ/mol in CoFeLa PBA and the catalytic activity for PMS-driven NOR degradation was largely improved, which can reach 76.4 % removal of NOR within 15 min, with an increased initial rate constant k of 0.095 min −1 . 1 O 2 was proven as the main reactive specie responsible for NOR degradation in the PMS/CoFeLa system, and O 2 · − and SO 4 · − were verified as the important intermediates to generate 1 O 2 . Thus, La doping can effectively enhance the catalytic performance of PBA-based catalysts for organic pollutant removal.
研究领域:
材料科学
·
环境化学
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催化
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2021
·
IF 3.627
Hua Fang,Xueyong Guo,Wei Wang,Jianxin Nie,Kehua Han,Chengcheng Wu,Shuji Wang,Di Wang,Peng Deng
The application of nano-catalytic materials in molecular perovskite energetic materials is of great significance to promote the development of molecular perovskite energetic materials in explosive formulations and propellants. In this paper, the thermal catalytic effects of CoFe-layered double hydroxide derivative on the molecular perovskite energetic material (DAP-4) were studied. In this study, we successfully prepared a new type of CoFe-based photothermal agent (CoFe-500) by heating CoFe layered double hydroxide nanosheets in an Ar atmosphere at 500 °C. And the micromorphology, structure composition , thermal decomposition performances of CoFe-500 and DAP-4/CoFe-500 composite were characterized. The experimental results showed that with the addition of CoFe-500, the initial decomposition temperature and peak exothermic temperature of DAP-4 showed a decreasing trend. With 10 wt% CoFe-500 added, the initial decomposition temperature and peak exothermic temperature of DAP-4 decreased from 305.6 °C to 166.3 °C and 379.0 °C–322.5 °C, respectively (10 °C/min heating rate). The apparent activation energy ( E a ) of pure DAP-4 is 172.27 kJ/mol and 175.13 kJ/mol calculated by the Kissinger and Ozawa method, respectively. And with 10 wt% CoFe-500 added, the E a is reduced to 119.11 kJ/mol and 122.84 kJ/mol, respectively. The possible thermal catalytic decomposition mechanism of DAP-4/CoFe-500 composites was proposed from the thermal analysis and mass spectrometry test results. This work is meaningful to further understand the decomposition performances of DAP-4 in the presence of nano-layered double hydroxide.
研究领域:
材料科学
·
化学工程
·
能源材料
✓ 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）