ACS Sustainable Chemistry & Engineering
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2026
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IF 7.6
Mengqi Ding,Xinhong Zhao,Yanru Li,Xuefeng Long,Hongwei Li,Dong Ji,Guixian Li
Iron-based zeolites are promising catalysts for various selective oxidation reactions, yet conventional three-dimensional microporous zeolites suffer from significant mass-transfer limitations, which become particularly pronounced in liquid-phase catalytic systems. In this study, we optimized the synthesis strategy and successfully prepared highly crystalline two-dimensional Fe-PREFER zeolite from a silicon–iron precursor under fluoride-free conditions, reducing the crystallization time to 5 days, thereby improving both economic and environmental sustainability. Through comprehensive characterization techniques including XRD, SEM/TEM, UV–vis DRS, Raman, and EPR spectroscopy, it was confirmed that iron species are incorporated into the zeolite framework as isolated tetra-coordinated sites, which serve as the active centers for catalysis. By adopting a “structure-directing-agent-retained” strategy for catalytic evaluation, the detrimental effects of high-temperature treatment on active sites were avoided. The Fe80-PREFER catalyst exhibited excellent performance in phenol hydroxylation, achieving a phenol conversion of 52.9% and a dihydroxybenzene selectivity of 90.6% under mild conditions (50 °C, 3 h). Mechanistic studies revealed that the reaction proceeds via a hydroxyl-radical pathway, with surface-activated phenol species identified as the key intermediates. To address catalyst deactivation, an ethanol-washing regeneration method was developed. This room-temperature process, which consumes far less energy than conventional high-temperature calcination, effectively removes surface phenolic tar while preserving the zeolite framework structure and the stability of the active iron species, leading to full recovery of catalytic performance. The synthesis and regeneration strategies established for this two-dimensional Fe-PREFER zeolite can be extended to other liquid-phase oxidation systems involving small molecules, such as low-temperature methane oxidation and aromatic hydroxylation.
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ACTA MATERIALIA
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2026
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IF 10.7
Yucheng Lv,Yao Di,Linlin Zhou,Hui Xu,Xinmei Hou,Yanglong Hou
The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are central to renewable energy technologies, yet their sluggish kinetics and reliance on scarce noble-metal catalysts hinder large-scale implementation. Here, we demonstrate that sulfur (S) -mediated spin-state engineering of single-atom Fe catalysts establishes a direct structure-spin-activity relationship for bifunctional oxygen electrocatalysis. Optimal S coordination shifts the Fe centers to a high-spin configuration within a porous hollow carbon architecture. This spin-state modulation optimizes the adsorption energetics of oxygen intermediates, lowering kinetic barriers for both ORR and OER. FeS 2 NC-h exhibits outstanding OER and ORR activity in alkaline media, achieving a low potential gap (ΔE) of 0.63 V, markedly outperforming the commercial Pt/C+IrO 2 (0.79 V). In rechargeable Zn-air batteries (RZABs), FeS 2 NC-h enables an open-circuit voltage of 1.50 V, peak power density of 202 mW cm −2 , specific capacity of 812 mAh g Zn −1 , and exceptional cycling durability exceeding 1200 h with round-trip efficiency >58%. This work establishes heteroatom-enabled spin-state engineering as a powerful strategy to transcend traditional coordination optimization, offering a general pathway to noble-metal-free integrated oxygen electrocatalysts for sustainable energy conversion and storage. Download: Download high-res image (302KB) Download: Download full-size image
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ANALYTICA CHIMICA ACTA
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2026
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IF 6.1
Peng Zhao,Kai Liu,Yueyan Li,Xiaofang Ban,Yuheng Wu,Jiaqi Liu,Xiaohong Wu,Ziyi Cheng,Fan Wang,Shuo Li,Feng Lin,Huifang Tang,Qingnan Zhao
The excessive activation of sympathetic nerve is closely related to cardiovascular diseases (CVDs). In this study, we developed a novel MIL-100(Fe)@Ag surface-enhanced Raman scattering (SERS) substrate for the simultaneous and effective detection of plasma norepinephrine (NE) and adenosine—two pivotal sympathetic hormones. The microscopic morphology and crystal structure of the substrate were characterized using techniques such as transmission electron microscope (TEM) and X-ray diffraction (XRD). Mechanistically, the HOMO-LUMO energy levels of the detection molecules were calculated using Gaussian. The substrate realized a dual SERS enhancement mechanism through the synergistic effect of localized surface plasmon resonance and interfacial charge transfer. Consequently, the MIL-100(Fe)@Ag platform exhibited high-sensitivity quantitative detection capabilities for NE and adenosine: the detection limit for NE is 0.596 nmol/L; the detection limit for adenosine is 0.24 nmol/L. Crucially, when applied to patients with pheochromocytoma—a neuroendocrine tumor characterized by plasma catecholamine surges, this method achieved robust and stable detection of plasma NE. It offered comparable diagnostic accuracy to conventional mass spectrometry while significantly reducing analysis complexity. Therefore, this innovative strategy may hold great promise for the long-term, decentralized monitoring of sympathetic nerve activity in populations at risk for CVDs or related clinical disorders.
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高影响因子
Nature Communications
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2026
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IF 18.1
Lv Guoliang,Zhang Linjuan,Luo Yuanyuan,Zhu Jianqiu,Wu Jilong,Qin Li,Zhang Yanlin,Zhang Zheng,Tan Pengwei,Duan Guotao
Simultaneously achieving chemiresistive gas sensors with high selectivity, sensitivity, and stability remains a significant challenge. In this study, inspired by the H 2 S-specific catalytic enzymes in biological systems, we construct an amorphous unsaturated-ligand MIL-68(Fe) 3D MOF via in situ thermal induction. Without the introduction of extrinsic catalytic or conductive components, this MOF modification strategy creates unsaturated Fe atoms within the framework itself. These atoms function dually as catalytic and conductive sites, thereby overcoming the inherent low conductivity of conventional 3D MOFs and enabling the direct construction of chemiresistive sensor for room-temperature molecular olfactory sensing. The targeted water-adsorption-coordinated catalytic mechanism bypasses the limitations of traditional oxygen adsorption processes to achieve unprecedented comprehensive performance, including fingerprint-level selectivity (against 29 interfering gases), superior sensitivity coefficient (~83/ppm), ultra-low measured lower limit (1 ppb), rapid gas sensing response/recovery characteristics (~30 s/73 s), and excellent long-term stability at room temperature.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhen Xu,Qi Xiang,Junchi Zhao,Xuede Qi,Hu Yuan,Dongdong Li,Jingwen Liu,Xiaoyi Huang,Qian Xue,Andreu Cabot,Xueqiang Qi
Fe-doping and oxygen vacancies synergistically optimize NiCo 2-x Fe x O 4-y for alkaline OER. • Oxygen vacancies facilitate OH − adsorption to accelerate the AEM pathway. • Fe species modulate oxygen covalency to trigger the LOM pathway. • Oxygen vacancies act as oxygen reservoirs to regenerate lattice oxygen. • Dynamic regeneration prevents structural collapse, harmonizing AEM and LOM. Developing oxygen evolution electrocatalysts that combine high activity, long-term durability, and low cost remains a central challenge because these properties are often constrained by competing reaction pathways. The adsorbate evolution mechanism (AEM) is limited by linear scaling relationships, whereas the lattice oxygen mechanism (LOM) offers higher activity but typically suffers from structural degradation due to lattice oxygen loss. Here, we demonstrate that Fe doping in NiCo 2 O 4 creates a synergistic interplay between Fe active sites and oxygen vacancies, enabling both enhanced activity and durability. Experimental and theoretical analyses reveal a dual-mechanism pathway: oxygen vacancies facilitate OH − adsorption to accelerate the AEM, while Fe species regulate O covalency to activate the LOM. Consequently, the optimized NiCo 1.4 Fe 0.6 O 4-y catalyst achieves an ultralow overpotential of 196 mV at 10 mA cm −2 . Furthermore, oxygen vacancies are proposed to facilitate lattice‑oxygen replenishment during LOM operation, thereby helping to mitigate structural degradation. This dynamic regeneration mechanism underpins the excellent long-term stability of more than 290 h. Overall, this work offers a practical strategy to break the activity–stability trade-off in oxygen evolution catalysis through oxygen-vacancy engineering of dual-mechanism pathways. Defect engineering synergistically unlocks coupled AEM and LOM pathways, with abundant oxygen vacancies accelerating intermediate adsorption and dynamically regenerating lattice oxygen, effectively breaking the intrinsic trade-off between catalyst activity and durability during alkaline water splitting. Download: Download high-res image (199KB) Download: Download full-size image
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APPLIED CATALYSIS A-GENERAL
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2026
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IF 4.8
Jing Li,Fan Zhang,Peng Zhang,Guowei Niu,Shanshan Liu,Huichuang Guo,Fei Wang,Qiang Chang,Hong Wang,Chenghua Zhang,Yong Yang,Yongwang Li
Si 3 N 4 is proposed as a precursor to construct Fe-Si interactions in FTS catalysts. • Fe/Si 3 N 4 catalyst exhibits stronger Fe-Si interaction and higher Fe 2 SiO 4 content than Fe/SiO 2 . • The formation of Fe 2 SiO 4 stabilizes Fe species and suppresses the formation of Fe 3 O 4 . • Preventing the formation of Fe 3 O 4 makes for decreasing CO 2 selectivity and WGS activity. Precise control over the metal-support interfacial structure plays a critical role in enhancing the activity and selectivity of iron-based catalysts for syngas conversion. Using silicon nitride as the starting precursor of silicon support, a series of SiN x O y supports with different oxidation degree were constructed via controlled oxidation under air, enabling modulation of the Fe-Si interfacial environment. A systematic comparison between silicon nitride-derived supports and conventional silica support revealed significant differences in structural evolution and catalytic behavior of iron catalysts. Spectroscopic characterizations including FTIR, solid-state NMR, XPS, XRD, and Mössbauer spectroscopy demonstrated that the unique interfacial structure formed during the oxidation of Si 3 N 4 stabilizes the active iron species (carbides) and suppresses the formation of undesired phases (Fe 3 O 4 ), thereby reducing CO 2 selectivity. These findings underscore the critical influence of support precursors on interfacial chemistry and reaction pathways, providing new insights and strategies for the rational design of Fe-based catalysts. Download: Download high-res image (76KB) Download: Download full-size image
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FIBERS AND POLYMERS
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2026
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IF 3.1
Liu Xing,Li Wanying,Li Guoxing,Li Ting-Ting,Lou Ching-Wen,Lin Yan-Yu
Dopamine (DA) abnormality is closely linked to Parkinson’s and other neurodegenerative diseases. Establishing a sensitive and highly selective DA detection platform holds significant importance for clinical diagnosis and disease prevention. This study successfully prepared Fe–BiVO 4 /BiOCl-CF/FeOOH flexible composite electrode based on carbon fiber fabric (CF) substrates via electrospinning, hydrothermal synthesis and impregnation-in situ growth methods. Corresponding photoelectrochemical (PEC) sensors were constructed for quantitative DA detection. The Fe–BiVO 4 /BiOCl heterojunction significantly suppressed photogenerated carrier recombination. FeOOH, functioning as the hole transport layer, further optimized charge separation efficiency, while the three-dimensional porous structure of CF shortened the electron transport path and reduced electrical resistance. The constructed PEC sensor exhibits favorable sensing performance for DA in 0.1 M phosphate buffer (pH = 7.0). Within the concentration range of 1–40 μM, the photocurrent response shows an excellent linear correlation with DA concentration (R 2 = 0.99446), and the detection limit is determined to be 0.038 μM (3σ/S). Moreover, the sensor exhibits negligible interference from common coexisting substances and retains over 80% of its initial photocurrent efficiency after 11 days of continuous operation, demonstrating satisfactory selectivity and stability. This work provides a feasible strategy for constructing highly sensitive, portable PEC sensors for DA detection. Graphical
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Zhenhua Xin,Renjie Chen,Chuanjin Lin,Bin Dong,Zuxin Xu
The aggregation and separation of magnetic biochar (MBC) are the bottlenecks in its application for the removal of hexavalent chromium (Cr(VI)) from aquatic media. To solve this problem, MBC and Fe(II)–sodium alginate (SA) hydrogel were combined to form SA–Fe(II)–MBC beads (SA–Fe–C), which were used for Cr(VI) removal and immobilization from aqueous solutions. SEM and XPS revealed that the 3D network structure of SA–Fe(II) hydrogel effectively prevented the aggregation of MBC. The experimental maximum Cr(VI) removal capacity of SA–Fe–C beads was 30.03 mg/g at pH 4. The spontaneous process of Cr(VI) removal by SA–Fe–C beads was best described by a pseudo-second-order model and dominated by chemical adsorption. Toxicity characteristic leaching procedure extraction showed that SA–Fe–C beads exhibited excellent immobilization capacity for Cr. The mechanism whereby SA–Fe–C beads removed and immobilized Cr(VI) from solution was found to involve: (1) adsorption, (2) reduction of Cr(VI) to trivalent chromium (Cr(III)) by Fe(II) and hydroxyl groups, and (3) co-precipitation of Cr(III) with Fe(II) to form chromite. In addition, the beads demonstrated excellent regeneration capability and reusability, showing promising potential for heavy metal removal from contaminated water.
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MATERIALS & DESIGN
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2025
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IF 7.9
Jingmei Huang,Ning Wang,Xiaoxiao Huang,Shihong Huang,Guoliang Xie,Jianfeng Zhang,Zhengzhao Li
Traumatic brain injury (TBI) is characterized by oxidative stress, neuroinflammation, and microglial dysregulation, leading to secondary neuronal damage. Here, we constructed coordination polymer nanoenzymes (Fe-FN CPs) with multiple enzyme-like activities and favorable biocompatibility. In vitro, Fe-FN CPs suppressed ROS accumulation, reduced pro-inflammatory cytokine release, and promoted microglial polarization toward the M2 phenotype. In vivo, Fe-FN CPs enhanced antioxidant defense, alleviated mitochondrial damage and cerebral edema, restored blood–brain barrier integrity, and improved cognitive performance. Mechanistically, Fe-FN CPs achieved dual regulation by inhibiting pro-inflammatory M1 polarization while promoting anti-inflammatory M2 polarization. These findings demonstrate that Fe-FN CPs exert potent neuroprotective effects and provide a promising nanomedicine strategy for TBI therapy based on natural active compounds.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Hengyi Lu,Huanxiao Li,Chuyang Liu,Jiayi Shao,Fangqi Guo,Xiang Tian,Xiaopeng Li,Pan Ying,Yujing Zhang,Guangbin Ji
To tackle the complex electromagnetic pollution from advances in radar and network technologies, a simple, low-cost, and efficient absorbing agent has been developed. By optimizing the high-temperature sintering of the melamine/reduced iron powder composite system, we successfully created a Fe-C-N multiphase composite material with multi-level structure and dielectric-magnetic loss properties. The gas produced by the decomposition of melamine at high temperatures fosters the formation of a pore structure. Additionally, controlling the heating temperature and holding time effectively manages the phase transition path, allowing for synergistic evolution of the microstructure and regulation of the microwave-absorbing properties. The analysis of SEM images and XRD results identifies the synergistic enhancement mechanism between the multi-level structure and multi-phase. This endows a reflection loss of -75.91 dB at 5.16 GHz for samples held at 700°C for 3 hours (thickness 4.4 mm), with a maximum bandwidth of 4.92 GHz (1.6 mm). It avoids the traditional multi-step process of carbon/nitrogen doping, effectively regulating the phase transition path and microstructure evolution. This provides a new approach to develop lightweight, broadband microwave absorbing materials.
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Journal of Energy Storage
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2025
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IF 9.8
Yufeng Xue,Xiaolin Ye,Zhuonan Yu,Zihao Peng,Shuqing Xing,Jinrong Chen,Qixing Wu,Xuelong Zhou
As global energy demand continues to grow, developing scalable and efficient energy storage systems with high energy density becomes increasingly critical. This study addresses these needs by exploring the use of mixed-acid electrolytes and premixed configurations in Sn-Fe redox flow batteries. We demonstrate significant improvements in solubility, electrochemical stability, and cycling durability. Specifically, incorporating sulfate ions into the electrolyte mitigates the common-ion effect, greatly increasing the solubility of ferrous and stannous chlorides and enabling higher energy densities of 24.22 Wh·L −1 at 80 mA cm −2 under room temperature. Electrochemical analyses reveals that sulfate ions positively shift the Sn 2+ /Sn redox potential by 120 mV at the negative side and also expand the operational voltage window beyond 1.44 V vs. SHE at positive side, significantly reducing undesirable side reactions such as chlorine evolution. Sulfate-rich electrolytes maintain superior stability, achieving coulombic efficiencies above 98 % under diverse operating temperatures. Additionally, a novel hydrogen-Fe 3+ rebalancing method is developed to effectively address Fe 3+ accumulation, restoring battery capacity from near depletion to around 15 Wh·L −1 . These findings underline the potential of mixed-acid premixed electrolyte systems and hydrogen-mediated rebalancing as robust strategies for advancing high-performance, scalable, and sustainable aqueous energy storage solutions.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Huimin Chen,Zhihong Xiao,Kaijun Liang,Rui Ma,Guojun Zou,Sha Li
In order to elucidate the intrinsic relationship between the local coordination environment of the tetrahedrally coordinated metal sites bound to zeolite framework and their catalytic performance in propane dehydrogenation (PDH) reaction, Fe-S-1, Fe-S-1-Na and FeAlPO 4 –5 catalysts with different isolated iron sites were constructed, characterized and evaluated. The catalytic performance tests demonstrated that the C H activation efficiency of the isolated Fe sites decreased in a sequence of {(≡SiO) 3 Fe(HO − Si≡)} > {Fe(OP≡) 4 } > {(≡SiO) 3 Fe(NaO − Si≡)}, while the propylene selectivity followed a trend of {(≡SiO) 3 Fe(NaO − Si≡)} > {(≡SiO) 3 Fe(HO − Si≡)} > {Fe(OP≡) 4 }. Through detailed reaction mechanism study using density functional theory calculations, the rate-determining step (RDS) of PDH is the first dehydrogenation step of propane to propyl intermediate. The intrinsic activity of different Fe sites is closely related to their effective charge redistribution ability during the reaction, which is profoundly affected by its local coordination environment. Isolated Fe sites exhibit activity proportional to their charge transfer efficiency in the initial dehydrogenation step. Higher extent of Fe reduction corresponds to greater catalytic activity, whereas propylene selectivity decreases with increased reduction. This work established the relationship between the catalytic properties of isolated Fe sites embedded in zeolite with their local coordination structure, opening up new prospect for the optimization design of PDH catalysts.
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