CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 51
·11991-11997
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IF 5.16
Muhammad K. Majeed,Guangyao Ma,Yanxiu Cao,Hongzhi Mao,Xiaojian Ma,Wenzhe Ma
Graphical Mesoporous Si/SiO x @NC nanospheres : A core–shell structured Si/SiO x @NC composite with distinct nanostructure was controllably synthesized through metal–organic framework (MOF)-derived magnesio-thermic reduction. Owing to the core–shell structure, the final product with the optimized nanostructure exhibits enhanced electrochemical performance in terms of reversible capacity and long-term cycling stability, which may be attributed to the many beneficial factors. Silicon (Si)-based anode materials with suitable engineered nanostructures generally have improved lithium storage capabilities, which provide great promise for the electrochemical performance in lithium-ion batteries (LIBs). Herein, a metal–organic framework (MOF)-derived unique core–shell Si/SiO x @NC structure has been synthesized by a facile magnesio-thermic reduction, in which the Si and SiO x matrix were encapsulated by nitrogen (N)-doped carbon. Importantly, the well-designed nanostructure has enough space to accommodate the volume change during the lithiation/delithiation process. The conductive porous N-doped carbon was optimized through direct carbonization and reduction of SiO 2 into Si/SiO x simultaneously. Benefiting from the core–shell structure, the synthesized product exhibited enhanced electrochemical performance as an anode material in LIBs. Particularly, the Si/SiO x @NC-650 anode showed the best reversible capacities up to 724 and 702 mAh g −1 even after 100 cycles. The excellent cycling stability of Si/SiO x @NC-650 may be attributed to the core–shell structure as well as the synergistic effect between the Si/SiO x and MOF-derived N-doped carbon.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
GREEN CHEMISTRY
·
2025
·Vol. 27
·期 8
·2276-2285
·
IF 9.2
Lixia Wang,Jiasui Huang,Jia Huang,Bowen Yao,Aling Zhou,Zhiyang Huang,Tayirjan Taylor Isimjan,Bao Wang,Xiulin Yang
Zinc–air batteries (ZABs) are considered a promising energy storage technology due to their high energy density and environmental friendliness. However, the development of efficient and durable oxygen reduction reaction (ORR) catalysts remains a challenge. Herein, we report the synthesis of a highly efficient CoP/Cu3P@NC catalyst using a Zn-MOF template, which was transformed into N- and C-doped bimetallic phosphides via high-temperature phosphating. The CoP/Cu3P@NC-based ZAB exhibits remarkable performance with an open-circuit voltage of 1.50 V, a peak power density of 215 mW cm−2, and a specific capacity of 691 mA h gzn−1, outperforming conventional Pt/C-based ZABs. The catalyst maintained 93.5% of its initial activity after 300 h of cycling, demonstrating its excellent long-term stability. Furthermore, CoP/Cu3P@NC was applied in flexible ZABs, achieving a power density of 74 mW cm−2 and showing stable performance under various bending conditions. The superior performance is attributed to the synergistic effects of Co and Cu, optimized structural properties, and high porosity, enhancing mass transfer and oxygen activation. These results suggest that CoP/Cu3P@NC is a highly promising ORR catalyst for next-generation ZABs, offering both high efficiency and durability in flexible and conventional energy storage applications.
研究领域:
材料科学
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电化学
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高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Xinyue Zhou,Yu Zhang,Tongxin Sun,Xu Xu,Lei Zhang
Therapeutic drug monitoring of isoniazid (INH), a first-line antitubercular agent, is critical due to its narrow therapeutic window and risk of toxicity or resistance at nonoptimal concentrations. Current methods lack the simplicity and accessibility required for point-of-care testing (POCT), especially in resource-limited settings. Herein, we report a paper-based colorimetric biosensing platform that integrates hollow-structured Fe-NC (Iron-Nitrogen-Carbon) nanozymes with smartphone-assisted readout for rapid, sensitive, and selective detection of INH in human biofluids. The nanozyme is synthesized via controlled pyrolysis of a dual-linker zeolitic imidazolate/tetrazolate framework (ZTF), where 2-methylimidazole (2-MIM) and thermally labile 5-aminotetrazole (5-AT) direct the formation of a hollow architecture that maximizes accessible Fe-N 4 active sites and enhances mass transport. This design confers superior peroxidase-like activity, enabling catalytic oxidation of chromogenic substrates in the presence of H 2 O 2 with high specificity toward INH. The resulting sensor achieves a detection limit of 0.24 μM and maintains high accuracy in human serum and urine, with minimal matrix interference. The entire assay is completed using a portable, low-cost device and a smartphone application for colorimetric analysis. Validated on human urine and serum, the platform demonstrates excellent reproducibility, stability, and field adaptability. This work presents a rational nanozyme design strategy through ligand-mediated structural control and establishes a scalable, equipment-free sensing framework for real-time therapeutic drug monitoring in POCT.
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PubMed
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2026
·Vol. 37
·期 5
·105239
·
IF 4.5
Yuli Wang,Qichao Xin,Chengling Zou,Yu Wang,Yuanyuan Li,Hai Nan,Fengqi Zhao,Haixia Ma
3,4-Bis(4′-nitrofurazano-3′-yl)furoxan (DNTF), a high-energy–density material, is severely restricted in practical applications due to its high mechanical sensitivity. This study develops an advanced desensitization strategy for DNTF composite via electrostatic spraying technology. The DNTF/FOX-7@NC (FOX-7, 1,1-diamino-2,2-dinitroethene; NC, nitrocellulose) hollow microsphere structure was formed through controlling the propulsion rate and the FOX-7 content. The composites retain the crystalline features of DNTF and FOX-7, while NC forms a continuous protective surface layer. Subsequently, the influence of FOX-7 content on the safety performance and combustion efficiency of the composites is systematically investigated. Results indicated that DNTF/FOX-7@NC hollow microsphere composites achieved a favorable balance between energy output and safety performance. Specifically, composites (with 38 % FOX-7 content) demonstrate superior thermal stability compared to raw DNTF. Its impact sensitivity increased by 14.7 J compared to raw DNTF (4.9 J), the critical load for friction sensitivity exceeds 360 N, demonstrating superior mechanical safety. Simultaneously, the combustion efficiency of the DNTF/FOX-7@NC hollow microsphere composite is significantly optimized, benefiting from the architecture of the hollow microspheres facilitating heat and mass transfer. This resulted in a 43 % reduction in ignition delay time of composite (from 109.24 s to 61.71 s). This work resolves the energy-safety trade-off in energetic materials via hollow microsphere structural design by electrostatic spray strategy, offering a scalable strategy for next-generation munitions.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Xiaoyu Ma,Jing Wang,Xiaowen Xu,Meilin Song,Kaixuan Gao,Tenghe Ma,Tengfei Li
Antioxidants such as ascorbic acid, glutathione, gallic acid, and caffeic acid are crucial for food quality and human health, yet their simultaneous discrimination in complex food matrices remains challenging due to overlapping reactivities. In this study, we developed a robust colorimetric sensor array based on trimetallic FeMnZn‑nitrogen‑carbon (FeMnZn-NC) nanozymes. Synthesized via high-temperature pyrolysis, the introduction of Zn as a sacrificial template generates abundant structural defects and exposes more active sites, resulting in significantly enhanced oxidase-like activity compared to mono- and bimetallic analogues. The nanozymes catalyze the rapid oxidation of TMB and ABTS substrates within 2 min, a process differentially inhibited by distinct antioxidants via varying electron-transfer and chelating mechanisms. Leveraging these unique kinetic “fingerprints,” a dual-channel sensor array was constructed to identify ascorbic acid, glutathione, gallic acid, and caffeic acid, exhibiting linear responses over 0–40 μM with detection limits of 0.22, 0.43, 0.21, and 0.14 μM, respectively. The sensor demonstrated excellent anti-interference capability and was effectively applied to identify antioxidants in apples, pears, and kiwifruits. The integration of a smartphone-assisted colorimetric platform enables rapid, on-site detection, highlighting its strong potential for food quality monitoring and nutritional assessment.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yanping Dong,Xiqiang Tian,Jinhui An,Pengyu Xu,Xinrui Wei,Muhammad Zahid
Achieving high activity, superior selectivity, and durable performance remains challenging for pristine MOFs in heterogeneous hydrogenation catalysis. Herein, nitrogen-doped carbon-wrapped Cu@Cu 2 O/NC heterogeneous catalysts enriched with Cu 0 –Cu + interfacial sites were readily derived by calcining Cu-MOF under an air atmosphere. Comprehensive characterization was conducted to examine synthesis-induced variations in bulk crystallinity, surface chemistry, and catalytic activity for Cu-MOF-250, Cu-MOF-350, and Cu-MOF-450. Compared to its counterparts, the Cu-MOF-350 catalyst exhibited optimal performance in the preferential hydrogenation of noxious 4-nitrophenol (4-NP) to valued 4-aminophenol (4-AP), maintaining high activity for up to ten consecutive rounds. The enhanced catalytic hydrogenation efficiency of the Cu-MOF-350 catalyst is ascribed to its distinctive nanostructural features, which originate from the synergistic interplay between Cu and Cu 2 O species. In addition, the improved uniform distribution of Cu@Cu 2 O nanoparticles generates higher concentration of interfacial exposed reactive Cu 0 /Cu + sites on the Cu-MOF-350 surface, which are considered crucial for the promoted hydrogenation of 4-NP.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
·
IF 3.9
Zhi-Rong Fu,Xin Zhang,Jing-Yuan Hao,Yu Han,Yu-Wei Xiang,Bao-Ju Wang,Xiang-Sen Wu,Yong Luo
The Co/NC catalyst for the hydrogenation of adiponitrile (ADN) is of great importance to produce high-value-added hexamethylenediamine (HMDA), which is the raw material for nylon-66. However, current research has not taken the Co particle size distribution effect fully into account for the ADN hydrogenation performance. In this work, Co/NC catalysts with various Co particle sizes using N-doped carbon as the support were prepared to investigate their activity differences. Among all catalysts, the Co/NC catalyst with an average Co particle size of 13.3 nm exhibited the best performance due to its most dispersed Co0 active site, reaching a complete ADN conversion within 40 min with an HMDA selectivity of 83.68%. It displayed a surprising HMDA STY of 49.77 mmol·gcat–1·h–1 under a greatly reduced activation energy (65.30 kJ·mol–1) with a reaction rate constant of 2.98 × 107 min–1. XPS and H2 pulse adsorption characterizations proved that the synergy between the Co0 content and dispersion emerged as the predominant factor governing the catalytic activity. This work provided a promising method for the design of an advanced catalyst for ADN hydrogenation.
研究领域:
催化化学
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化学工程
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材料科学
·
有机合成
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 23
·1-13
·
IF 2.8
Xu Cheng,Liu Ke,Lu Yong,Xu Qi
Sodium-ion batteries (SIBs), as an emerging energy storage technology, have been recognized as one of the most promising alternatives to lithium-ion batteries (LIBs). Among various cathode materials, the NASICON-type Na 4 VMn(PO 4 ) 3 (NVMP) composite material has garnered considerable attention owing to its distinctive 3D framework structure, high redox potential, stable crystal structure, and rapid Na + diffusion rate. Nevertheless, the practical application of NVMP cathodes is constrained by several inherent limitations, including inherently low electronic conductivity, Mn 3+ Jahn–Teller distortion, and structural degradation mechanisms, which collectively contribute to compromised rate capability and limited cycling durability. To tackle this challenge, an N-doped dual nano-carbon coating was applied to the NVMP material to enhance the conductivity of the composite. Building upon this foundation, a series of Na 4 VMn 1- x Cr x (PO 4 ) 3 /NC@CNTs cathode materials (where x = 0, 0.25, 0.5, 0.75, and 1) were successfully prepared using the sol–gel method, enabling targeted regulation of Mn/Cr ratios for enhanced electrochemical performance. The N-doped dual nano-carbon coating is capable of forming carbon layer defects and active sites, as well as constructing a 3D conductive network structure, which can enhance the diffusion rate of Na + ions and shorten their transport path. The results indicate that the Na 4 VMn 0.5 Cr 0.5 (PO 4 ) 3 /NC@CNTs cathode material demonstrates the highest discharge capacity, achieving 132.1 mAh·g −1 when x = 0.5. Notably, the capacity decreases rapidly at high rates, potentially attributed to the collapse of the crystal structure and excessive polarization, resulting in a deterioration of the material’s electrochemical performance. The optimized Na 4 VCr(PO 4 ) 3 /NC@CNTs (when x = 1) demonstrates exceptional rate performance with 91.2% capacity retention at 1C, accompanied by significantly reduced charge transfer resistance (Rct = 331.9 Ω). This study establishes a design paradigm for NASICON-type cathode materials through dual-transition metal synergistic doping and demonstrates the efficacy of Cr/Mn co-substitution in balancing ionic/electronic conductivity for next-generation high-power sodium-ion batteries.
研究领域:
材料科学
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电化学
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储能技术
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纳米技术
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无机化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Zhiru Yang,Zi Yang,Wentao Hou,Hai Zhou,Hao He,Chao Jin
Three-dimensional S-CN/NC/CNTs network composites were synthesized via a combined hydrothermal and high-temperature treatment strategy. And their electrochemical behavior as supercapacitor electrodes was investigated. Compared with conventional synthesis routes, this method provides distinct advantages. Cobalt and nickel nanoparticles catalyze the directional growth of carbon nanotubes (CNTs) from melamine, forming a uniform coating structure that significantly enhances the electrical conductivity of the electrode. Concurrently, the sulfidation of cobalt and nickel nanoparticles dispersed within the nitrogen-doped carbon (NC) matrix and CNT network generates abundant redox-active sites, thereby improving the specific capacitance. Within this composite, Co-Ni-S functions as the electrochemically active phase, NC serves as the structural scaffold, and CNTs form an interconnected three-dimensional conductive framework that facilitates efficient electron transport. The synergistic interaction among these components endows the material with superior electrochemical performance. The optimized composite exhibits a high specific capacitance of 2104 F g⁻¹ at 0.5 A g⁻¹ in 6 M KOH electrolyte. Furthermore, a flexible quasi-solid-state supercapacitor assembled using this material as the positive electrode, activated carbon as the negative electrode, and a gel polymer electrolyte achieves an energy density of 40.3 Wh kg⁻¹ at a power density of 750 W kg⁻¹ , maintaining 87.6 % capacitance retention after 5000 cycles at 10 A g⁻¹ with excellent mechanical flexibility. This study presents an effective route for enhancing the electrochemical performance of three-dimensional composite electrodes through hierarchical conductive network design and controlled active-site dispersion, offering valuable insights for the development of high-performance energy storage materials.
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高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Jinhong Wu,Xiaohan Sun,Haosen Chen,Siwei Guo,Dong Hou,Deyong Wang,Huihua Wang
Oxygen evolution reaction (OER) impedes the electrochemical water splitting for H2 production, ascribing to the depressed kinetics of the four proton-coupled transfer process. Transition metal oxides, especially bimetallic oxides, have been proven to be promising OER electrocatalysts due to their part unoccupied d-band characteristics. More interestingly, oxygen vacancies (Ov) easily constructed in transition metal oxides can modulate the electron structures and thereby boost the OER performance. However, most synthesized processes involving oxygen vacancy engineering, such as atom dopant, chemical/electrochemical reduction, and H2/Ar-dependent calcination, are energy-intensive and time-consuming, largely hampering their commercial applications. Herein, we suggest a simple and facile strategy for fabricating double spinel oxides with abundant oxygen vacancies by calcinating Ni/Fe@ZIF-67/CC precursor under a nonoxidation condition. The obtained Ov-CF1N2O@NC/CC-550 with vast oxygen vacancies exhibits excellent OER performance, representing a lower overpotential of 185 mV at 10 mA cm–2, smaller Tafel slope of 47.3 mV dec–1, as well as faster interface reaction kinetics (Rct = 0.7336). Theoretical calculations further confirm that the excellent electrochemical activity strongly corresponds to the lower d-band center of active sites on the Ov-CoFe2O4 (311) model and decreased reaction Gibbs energy barrier. The work might shed light on oxygen vacancy engineering via a simple and facile strategy and inspire a smart design of multimetallic oxide electrocatalysts with high OER performance.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Chemistry-An Asian Journal
·
2026
·Vol. 21
·期 2
·e70568
·
IF 3.3
Yankai Zhang,Xiaolei Yu,Fan Liu,Yongping Ma,Jitong Wang
Lithium-sulfur batteries have garnered significant attention from the scientific community due to their intrinsic advantages, including low cost, abundant resources, and high specific energy. However, the shuttle effect of soluble polysulfides and the sluggish redox kinetics of sulfur species have greatly hindered their commercialization and practical application. Herein, we propose a straightforward strategy to construct NiCo 2 O 4 -NC heterostructure nanocages, which serve as multifunctional separator modifiers to improve the electrochemical performance of lithium-sulfur batteries. Specifically, nitrogen doping enhances the polarity of the carbon matrix, enabling both physical confinement and chemical anchoring of polysulfide species. Meanwhile, the embedded NiCo 2 O 4 provides abundant catalytic sites that accelerate the redox kinetics of lithium polysulfides. Consequently, the battery assembled with the optimal NiCo 2 O 4 -NC-1 modified separator demonstrates an excellent initial capacity of 1017.8 mAh g −1 at 0.5 C and a remarkable cycling stability with only 0.04% capacity decay per cycle at 2 C. Moreover, NiCo 2 O 4 -NC-1 exhibits stable electrochemical behavior under high sulfur loading, highlighting its multifunctional structural advantages. This work provides a viable strategy for designing advanced separators in high-performance lithium–sulfur batteries.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
·
IF 4.464
Liyan Wu,Jianmei Cen,Asad Ali,Jiecai Li,Pei Kang Shen
Conducting polymers are commonly used as precursors for preparing carbon-based catalysts and have been used in electrocatalytic water splitting. However, so far, most of the catalytic materials synthesized with the assistance of high polymer conducting polymers are non-self-supporting and have only a single-function catalytic effect. Therefore, it is an inevitable trend to synthesize a bifunctional self-supported, highly efficient and long-stable water splitting catalyst. Herein, a self-supporting polypyrrole precursor PPy-PW 12 was prepared by electrodeposition with phosphotungstic acid as a dopant. In addition, the PPy-PW 12 precursor was then calcined. The as-prepared W/Ni 3 (PO 4 ) 2 @NC/NF electrocatalyst exhibits admirable HER and OER performances with overpotentials of 48 mV for HER and 236 mV for OER to reach a current density of 10 mA cm −2 in 1.0 M KOH solution. Additionally, when W/Ni 3 (PO 4 ) 2 @NC/NF is used in overall water splitting as a bifunctional catalyst, it needs only 1.53 V to deliver a current density of 10 mA cm −2 , which is superior to typically integrated Pt/C and RuO 2 counterparts. Our work offers a facile strategy to apply W/Ni 3 (PO 4 ) 2 @NC/NF as practical bifunctional electrocatalysts for large-scale water splitting.
研究领域:
电化学
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材料科学
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催化
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能源材料
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高影响因子
危险品化学品经营许可证（带存储）