ELECTROCHIMICA ACTA
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2026
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IF 5.8
Xiaoxi Li,Xianyi Gou,Boon Tong Goh,Hong Du
Co-O-Fe electronic modulation lowers OER overpotential to 169 mV at 10 mA cm −2 . • Rapid interfacial charge transfer yields a low Tafel slope of 106.4 mV dec − ¹ mV dec −1 . • Fe-to-Co electron transfer optimizes the D-band center for OER intermediates. • Heterointerface prevents MOF aggregation and exposes abundant active sites. Overcoming the sluggish kinetics of the oxygen evolution reaction (OER) remains a primary bottleneck in advancing sustainable hydrogen generation technologies. Herein, a dual-metal-organic-framework (dual-MOF) heterostructure, ZnCo-ZIF@MIL-100 (denoted as ZM-3), was constructed via a one-step hydrothermal method, where MIL-100 frameworks were epitaxially grown on orthododecahedral ZnCo-ZIF templates. This core-shell heterostructure inherits the structural merits of both MOF phases, achieving 10 mA cm − ² at an overpotential of 169 mV with a Tafel slope of 106.4 mV dec − ¹ in 1.0 M KOH. Comprehensive characterisation (XRD, SEM/TEM, XPS, etc.) and electrochemical analysis verify that heterostructure formation triggers notable electron redistribution from Fe to Co centres, optimises interfacial charge transfer and boosts accessible catalytic sites. DFT calculations further confirm that interfacial Co-O-Fe bridge sites tune the adsorption energetics of oxygenated intermediates, reducing the energy barrier of the potential-determining step. This work offers an interfacial regulation strategy for developing advanced MOF-based oxygen evolution electrocatalysts. ZM-3 exhibits a low overpotential, a small Tafel slope (106.4 mV dec −1 ) and long-term stability for OER. Download: Download high-res image (202KB) Download: Download full-size image
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高影响因子
CERAMICS INTERNATIONAL
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2026
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IF 6
Tao Wen,Xiaoyan Yang,Yanwei Yuan,Xiaoke Lv,Zhen Wang,Tianmeng Zhang,Bin Wu,Jianjun Chen
With the widespread proliferation of electronic and intelligent devices, increasingly stringent requirements have been imposed on microwave absorption materials. Ti 3 C 2 T x MXene is considered a promising microwave absorbing material with excellent properties. However, its high electrical conductivity and monotonous loss mechanism restrict its development in the field of microwave absorption. In this work, Ti 3 C 2 T x /Ni-Fe Prussian blue analogue (PBA) porous composites were synthesized via ion intercalation and chemical synthesis methods. The hollow cage-like Ni-Fe PBA was in-situ grown between the Ti 3 C 2 T x nanosheets. Benefiting from the magnetic loss characteristics and porous structure of Ni-Fe PBA, both the magnetic loss and polarization loss of Ti 3 C 2 T x were enhanced. The synergistic effect of multiple loss mechanisms optimized the impedance matching. Furthermore, the hollow cage-like structure of Ni-Fe PBA extended the propagation path and prolonged the transmission time of incident electromagnetic waves, thereby significantly improving the microwave absorption performance of the composite material. Consequently, the Ti 3 C 2 T x /Ni-Fe PBA composites achieve a significantly improved minimum reflection loss (RL min ) of −48.97 dB and an effective absorption bandwidth (EAB) of 3 GHz at a thickness of 3.9 mm. The radar stealth performance of the composite was evaluated by radar cross-section (RCS) simulation, with the maximum RCS reduction value reaching 11.75 dB m 2 . This work provides a promising strategy for developing high-performance microwave absorbers through structural and compositional design.
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Nano Materials Science
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2026
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IF 20.5
Chuanxin Yu,Ruizhu Li,Na Gao,Tiancheng Cui,Chengzhi Guan,Jinli Qiao,Jian-Qiang Wang,Guoping Xiao
The cathode material is a key determinant in the advancement of solid oxide fuel cells (SOFCs). However, achieving a balance between high electrocatalytic activity and long-term stability is still a major challenge. In this work, an in situ self-assembly strategy was developed to fabricate Pr 0.4 Sr 0.5 Ce 0.1 Fe 0.8 Ni 0.2 O 3-δ (PSCFNX) composite materials. During the calcination process, CeO 2 and NiO secondary phases spontaneously segregate and grow on the surface of the Pr 0.4 Sr 0.5 Ce 0.1 Fe 0.8 Ni 0.2 O 3-δ (PSCFN) phase. This process leads to the formation of intimate three-phase junctions and abundant bonded heterointerfaces, thereby expanding the electrochemically active area and significantly enhancing catalytic performance. The optimized PSCFNX material exhibits a low area-specific resistance of 0.081 Ω cm 2 at 800 °C. Correspondingly, the cell with an optimized cathode achieves a high peak power density of 1.576 W cm −2 at 800 °C and exhibits a long-term stability exceeding 100 h. This study confirms that the Pr 0.4 Sr 0.5 Ce 0.1 Fe 0.8 Ni 0.2 O 3-δ materials could enhance SOFC performance.
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高影响因子
CARBON
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2026
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IF 12.7
Jiabei Yu,Depeng Zhang,Xinyu Lu,Siqi Wang,Liying Wang,Yuqing Zhang,Sen Zhang,Chao Deng
Dual single-atom catalysts (DACs) provide an efficient clue to conquer the sluggish kinetics of oxygen reactions in Zn-air batteries (ZABs). However, the precise modulation on local microenvironment of DACs sites are still challenging. Herein, we report a defect-driven strategy to manipulate the microenvironment of Fe/Mn dual atomic sites that anchor on a carbon nanofiber (def-FeMn/CNF). Theoretical calculation results reveal that the defects modulate the local microenvironment of dual atom sites, which decreases the energy barrier and enhances the catalytic behaviors. Finite element analysis (FEA) modeling results demonstrate the porous carbon nanofiber is beneficial to mass transports and ensures fast kinetics. Benefitting from both aspects of advantages, the def-FeMn/CNF catalyst displays the superior pH-universal electrocatalytic properties, fast kinetics, and high stability. It exhibits the half-wave potentials of 0.92 V and 0.87 V in alkaline and acidic conditions, which outperform the FeMn-DAC/CNF, N–FeMn/CNF, Fe-SAC/CNF, and Mn-SAC/CNF reference samples. Moreover, the full Zn-air battery (ZABs) with def-FeMn/CNF cathode shows the high power densities of 295 W kg −1 and high stability over long-term (1000 h) cycling. Furthermore, the quasi-solid-state Zn-air batteries achieve a smooth operation over a wide-temperature range and a long-term (800 h) operational stability at curved state. Therefore, the defect-driven approach provides an efficient strategy to manipulate the local microenvironment of DACs for boosted catalytic properties. Moreover, it also gives a new clue to design and fabrication of pH-universal electrocatalysts towards diverse working conditions. Download: Download high-res image (485KB) Download: Download full-size image
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yan Chen,Chao Lei,Kun Yang,Ming-Li Ye,Yong-Gang Zhao,Yun Zhang
Metal organic frameworks (MOFs) are widely employed as separable and highly efficient adsorbents in VOCs (volatile organic compounds) pollution in the air. However, due to poor stability and easy hydrolysis in water, traditional MOFs cannot yet be used for the removal of VOCs in wastewater. Here, a novel series of magnetic Fe–Cu bimetallic MOFs possessing dual hydrophilic and hydrophobic functionality was prepared for VOCs removal in wastewater. The materials were characterized using scanning electron microscopy (SEM), vibrating sample magnetometry (VSM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicate that both of the morphological and adsorption performance of magnetic Fe–Cu bimetallic MOFs are highly dependent on the molar ratio of ethylenediamine to 4,4-bipyridine used during synthesis. When the molar ratios of ethylenediamine to 4,4-bipyridine are 5:1, 1:1, and 1:5, the morphologies of prepared magnetic Fe–Cu bimetallic MOFs are gravel-like, cobble-like and calcite-like, respectively. They are named as magnetic gravel-like Fe–Cu metal organic frameworks (Mag-Gra-Fe-Cu MOFs), magnetic cobble-like Fe–Cu metal organic frameworks (Mag-CoL-Fe-Cu MOFs) and calcite-like Fe–Cu metal organic frameworks (Mag-CaL-Fe-Cu MOFs). Moreover, the maximum adsorption capacity of Mag-Gra-Fe-Cu MOFs, Mag-CoL-Fe-Cu MOFs and Mag-CaL-Fe-Cu MOFs could reach up to 487.80–621.12 mg/g, 549.45–666.67 mg/g and 598.80–724.64 mg/g, respectively. Under optimal conditions, the adsorption of VOCs onto the magnetic Fe–Cu bimetallic MOFs followed the pseudo-second-order kinetic model (R² = 1) and the Langmuir isotherm model (R² > 0.999). Consequently, the magnetic Fe–Cu bimetallic MOFs developed in this work represent a viable and efficient option for removing VOCs from wastewater. Download: Download high-res image (251KB) Download: Download full-size image
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2026
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IF 5.3
Lei Wang,Yue Huang,Jiawei Su,Haojie Su,Weihao Shen,Sanqing Huang,Xueqin Zhao
Ensuring food safety requires reliable methods to monitor toxic contaminants like p-aminophenol (p-AP), which can migrate from plastic packaging or accumulate as veterinary drug residues in food products. However, the absence of rapid and field-deployable detection methods poses a persistent obstacle to its effective monitoring. In this work, we developed iron-doped silicon quantum dots (Fe-SiQDs) as a robust peroxidase-mimicking nanozyme and engineered a dual-mode sensing platform for p-AP detection comprising a solution-based assay for laboratory use and a hydrogel strip for on-site smartphone-assisted quantification. The solution assay achieved high sensitivity (LOD: 5.22 μM) with excellent correlation to HPLC (R² = 0.9994), while the hydrogel strip enabled quantification within 15 min without complex instrumentation. The Fe-SiQDs-based hydrogel sensor was tested on real-world food matrices including honey and bottled water, achieving accurate recoveries between 93.2% and 119.5% with high reproducibility (RSD < 2.1%). This cost-effective and field-ready system provides a practical solution for rapid screening of p-AP in food samples, offering a useful tool for food safety monitoring.
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高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Shu-Yu Wang,Yin-Hong Niu,Fang-Di Hu
A ratiometric colorimetric sensing platform was developed for nitrite detection, featuring a trimetallic metal-framework (MOF) nanozyme (Mn/Ni/Fe-MOF) synthesized via a facile one-pot solvothermal method. Comprehensive characterization revealed its successful fabrication and superior structural properties. The rational design of the trimetallic system creates a synergistic electron transfer network, endowing it with significantly enhanced peroxidase-like activity that surpasses its mono- (Fe-MOF) and bimetallic counterparts (Mn/Fe -MOF and Ni/Fe -MOF). This advancement leads to a low detection limit of 1.39 μM and a wide linear range of 2.0–150 μM for nitrite sensing, improving the sensitivity of nanozyme-based colorimetric method. Leveraging this high activity, Mn/Ni/Fe-MOF catalyzed H 2 O 2 -mediated oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue product (oxTMB). Subsequently, a robust ratiometric platform (A 450 /A 652 ) was constructed based on a specific diazotization reaction between nitrite and oxTMB, which induced a distinct color change and an absorbance shift. Unlike single-signal assays prone to fluctuations, this internal reference mechanism automatically corrects for common interferences, ensuring high accuracy and reliability in complex matrices, as evidenced by excellent recoveries (97.9%–102.3%) in real samples (tap water and sausage). The entire system is characterized by remarkable simplicity: the nanozyme is synthesized via a facile one-pot method, and the detection requires only a single-step addition of nitrite to the pre-formed oxTMB system under mild acidic condition. This streamlined, “mix-and-detect” protocol avoids complex modifications, multi-step reactions, or sophisticated instruments, offering practical advantages for potential on-site application. This work presents a reliable, high-performance sensing strategy and highlights the great potential of multi-metal MOF nanozymes in designing advanced sensors.
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高影响因子
Journal of Water Process Engineering
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2026
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IF 6.6
Lei Fang,Yuman Lv,Xinlei Liu,Shijie Wang,Miaomiao Ye
An iron–copper bimetallic biochar catalyst (Fe-Cu@BC) was synthesized to establish a heterogeneous peroxymonosulfate (PMS) activation system aimed at improving the removal of typical organic pollutants in drinking water sources. The physicochemical properties of the catalyst, the catalytic performance, reactive species generation, pollutant degradation pathways, and impacts on dissolved organic matter (DOM) transformation were systematically investigated. Under the optimized conditions, a humic acid (HA) removal efficiency of 66.28% was achieved, which was attributed to the cooperative redox behavior of Fe and Cu species. Radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy confirmed the simultaneous generation of OH, and 1 O 2 . A quantitative chemical probe-based kinetic analysis clarified the contributions of individual reactive species, and pollutant degradation proceeded through the combined action of OH/-driven radical oxidation and 1 O 2 -mediated selective oxidation. Advanced characterization using three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) showed that the system altered the molecular composition of DOM in both conventionally treated and advanced-treated effluents, converting high-molecular-weight, reduced components into low-molecular-weight, more oxidized intermediates. This work provides an effective catalytic strategy for the deep treatment of organic-contaminated water using carbon-based bimetallic activators.
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高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Yifan Zhu,Renjie Wang,Mengyao Ma,Hanyu Ji,Jinnan Gan,Xudong Song,Huijuan Ran,Qianqian Chen,Qiaohan Cheng,Hongyu Zhu,Qingsong Zhu
Uric acid (UA) concentrations serve as pivotal health indicators. This study developed a novel carbon paper (CP) and Fe-MOF composite and utilized it as an efficient electrochemical sensor for the detection of UA. SEM, XRD and FT-IR confirms the successful in-situ growth of Fe-MOF on the carbon paper substrate. The sensor exhibits a linear response to UA concentrations ranging from 3 to 400 μM, with a high correlation coefficient (R 2 = 0.998) and a LOD of 2.798 μM. The sensor demonstrates excellent reproducibility, with an RSD of less than 5%, and notable long-term stability, retaining 96.4% of its initial current response after one month. Furthermore, it exhibits selectivity in UA detection even in the presence of interfering species such as ascorbic acid and dopamine. The feasibility of using the CP/Fe-MOF sensor to detect UA in a typical biological fluid, bovine serum, was also evaluated by the standard addition method. The enhanced sensing performance can be attributed to the preservation of the carbon paper's superior electron transport properties within the composite material, combined with the increased specific active sites by the Fe-MOF components, which significantly boost the electrochemical sensing capabilities.
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Energy & Environmental Materials
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2026
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IF 13.8
Eunchae Oh,Jaewon Jang,Yoon Kyeung Lee,Junghoon Yang,Byung-Joo Kim,Jungpil Kim
The direct conversion of CO 2 into high-quality carbon nanotubes (CNTs) remains a formidable challenge, primarily due to the oxidation of metal catalyst by the oxidative nature of CO 2 . To overcome this limitation, a tandem catalytic system was implemented, in which CO 2 was converted to produce CH 4 on Ni catalysts in the primary reactor, and the CNT was synthesized from CH 4 on an Fe catalyst in the secondary reactor. Nevertheless, unreacted CO 2 was introduced into the secondary reactor, where the Fe catalysts were oxidized and thus failed to produce any solid carbon. To prevent the oxidation of Fe catalysts, a bimetallic Fe–Mo catalyst was employed instead of pure Fe. Mo was partially converted to Mo 2 C by reacting with unreacted CO 2 , which effectively suppressed the oxidation of Fe, thereby stabilizing the active Fe phase. This transformation was further corroborated by XPS analysis, where the Mo 3d spectra exhibited an increased Mo 2+ peak intensity, whereas the Fe 2p spectra showed a stronger metallic Fe signal, confirming that Mo incorporation inhibited Fe oxidation. However, excessive Mo loading resulted in the formation of multi-walled CNTs instead of single-walled CNTs, as evidenced by the reduced selectivity toward radial breathing modes in the Raman spectra and the broader diameter distribution observed in TEM measurements. These findings underscore the critical role of Mo in preserving Fe activity under oxidizing conditions and highlight the importance of optimizing its content, as an appropriate Mo level enables the selective synthesis of high-quality single-walled CNTs from CO 2 via a dual-step tandem process.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Hui Cheng,Tong Yu,Yanhong Wang,Yang Zhao,Qinfu Zhao,Huifen Feng
The limited penetration and efficacy of chemotherapeutic agents, constrained by the distinctive pathophysiological conditions of the tumor microenvironment (TME), remain a major therapeutic obstacle. In recent years, there has been growing interest in modulating the TME to overcome these barriers, which provides a promising way for enhancing cancer treatment. To address this challenge, a multifunctional nanoparticle system (DOX/FeNHC-PEG) was developed for oxidative stress-augmented triple-modal therapy. The system was constructed by doping Fe 3+ ions and N atoms into hollow carbon nanostructures, followed by surface functionalization with NH₂-PEG and subsequent loading of doxorubicin (DOX) into its mesoporous cavities. FeNHC-PEG nanozyme exhibited remarkable multi-enzyme mimetic activities, consuming endogenous glutathione while generating substantial OH through the peroxidase (POD)-like and oxidase (OXD)-like activities, thereby intensifying tumor oxidative stress. Furthermore, the nanozyme demonstrated excellent photothermal conversion efficiency under NIR irradiation. Crucially, real-time shear wave elastography (SWE) revealed that the combined effects of photothermal therapy (PTT) and reactive oxygen species (ROS) significantly reduced tumor viscoelasticity by degrading extracellular matrix components. The change not only enhanced intertumoral drug penetration but also cooperated with persistent oxidative stress to remodel the tumor microenvironment, ultimately leading to a significant increase in chemosensitivity to DOX. Meanwhile, the localized hyperthermia further potentiated the enzyme-like activities, enabling amplified ROS generation. In vivo studies indicated that DOX/FeNHC-PEG exhibited outstanding biocompatibility and potent tumor growth suppression (95.8% ± 1.8% inhibition) with negligible systemic toxicity. The triple-synergistic therapy system represented an innovative approach for tumor microenvironment remodeling, showing considerable translational potential.
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PubMed
高影响因子
INORGANIC CHEMISTRY
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2026
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IF 4.6
Huanran Zheng,Yuchao Wang,Jing Zhang,Yu Bai,Yingbi Chen,Peiyao Yang,Md Raziun Bin Mamtaz,Danni Deng,Zechao Zhuang,Houzheng Ou,Meng Wang,Guozhao Fang,Haozhi Wang,Xiang Xiong,Dingsheng Wang,Chuan Zhao,Yongpeng Lei
The high desorption energy barrier for OH– hinders the improvement of the oxygen reduction reaction (ORR) and related devices. Here, an Fe-based atom pair catalyst for ORR is discovered through high-throughput density functional theory calculations. The atomic Te around the Fe1–N4 site (Te1–N2–Fe1–N2) served as an electron pump to achieve charge dilution, contributing to an onset potential of 1.03 V and a half-wave potential of 0.94 V. Moreover, a kinetics current density of 32.4 mA cm–2 and remarkable durability up to 20000 continuous electrolysis cycles (1/4 activity decay that of the Fe1–N4 site) were achieved. An ab initio molecular dynamics simulation revealed the formation process of Fe–Te dual atoms. In situ characterization and comparative experiments verify that the charge dilution toward a single Fe site around atomic Te resulted in promoted O2 conversion and accelerated *OH desorption. The corresponding Al-air batteries showed an open-circuit potential of 1.62 V, a power density of 138.1 mW cm–2, and stable voltages during the long-term discharging process (446 h at 10 mA cm–2 and 270 h at 20 mA cm–2). The study demonstrates the single-atom electron pump as an effective strategy for handling the charge density around single-atom sites for electrocatalysis.
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PubMed
高影响因子
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