INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Zhenfei Li,Haoteng Yuan,Chenzhao Liu,Anas Mousa,Liyuan Fan,Dong Yan,Bin Hua,Lichao Jia
The practical deployment of reversible protonic ceramic cells requires oxygen electrodes that can operate efficiently and reversibly without relying on cobalt- and strontium-containing perovskites, that often suffer from thermal mismatch, surface segregation, and durability degradation. Here, we report a Sr/Co-free Ba/Fe co-doped Ruddlesden–Popper nickelate, Pr 1.8 Ba 0.2 Ni 0.9 Fe 0.1 O 4+δ (PBNF0.1), as an efficient and stable oxygen electrode. Ba incorporation stabilizes the layered Pr 2 NiO 4+δ framework, while Fe substitution regulates the Ni valence state, promotes oxygen-vacancy formation, and enhances hydration capability, thereby improving oxygen-electrode kinetics. Consequently, PBNF0.1 exhibits reduced polarization resistance compared with Pr 1.8 Ba 0.2 NiO 4+δ (PBN) and delivers excellent reversiblecell performance, achieving 1.28 W cm −2 in fuel-cell mode and −2.47 A cm −2 at 1.3 V in electrolysis mode at 700 °C. Stable operation under fuel-cell, electrolysis, and reversible cycling conditions further highlights Ba/Fe co-doping as an effective strategy for durable Sr/Co-free oxygen electrodes.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yu-Zhen Wang,Xiao-Yue Kang,Ning-Na Shi,Mao-Zhong Tian,Qi-Liang Pan,Yun-Feng Bai,Langxing Chen
A Fe-MOFs/rGO/Au ternary composite to construct a competitive electrochemical immunosensor for Hg 2+ . • The porous conductive hybrid accelerates mass transfer and provides abundant antibody binding sites. • The established immunosensor exhibits two linear range of 0.05–200 and 250–2500 nM of Hg 2+ . • The established immunosensor displays the specific selectivity and a low LOD of 0.075 nM. • The sensing platform shows the promising potential for environmental heavy metal monitoring. The development of ultrasensitive Hg 2+ detection in water environments is crucial owing to its severe toxicity to ecosystems and human health. In this work, a label-free competitive electrochemical immunosensor was fabricated for the detection of mercury ions (Hg 2+ ) based on a ternary iron-based metal organic framework/reduced graphene oxide/gold nanoparticles (Fe-MOFs/rGO/AuNPs) nanocomposite. The Fe-MOFs/rGO hybrid composite was synthesized via a hydrothermal strategy, which significantly enhanced the conductivity and effective surface area of the electrode interface. Furthermore, L-cysteine-mediated AuNPs were covalently conjugated to the Fe-MOFs/rGO matrix, which not only offered a stable substrate for the immobilization of anti-Hg 2+ antibodies but also accelerated interfacial electron transport. By monitoring the current response through differential pulse voltammetry (DPV), the immunosensor exhibited the two linear ranges of 0.05–200 nM and 250–2500 nM toward Hg 2+ , accompanied by an ultralow detection limit (LOD) of 0.075 nM. Benefiting from the synergistic effect of the ternary nanocomposite as well as the outstanding specificity of antibody-antigen immunorecognition, the developed immunosensor meets the requirement for the safety monitoring Hg 2+ in complex environmental water samples. Download: Download high-res image (152KB) Download: Download full-size image
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ENERGY & FUELS
·
2026
·Vol. 40
·期 29
·16000-16012
·
IF 6
Zhang Wenxia,Zhang Juan,Ding Huiping,Wang Rongyu,Chen Jiangang
A series of Fe/ZrO 2 Fischer–Tropsch
synthesis
catalysts were prepared via a solid-state grinding method assisted
by citric acid ligands, aiming to enhance the dispersion of active
metal and tailor the metal–support interfacial structure through
a green, solvent-free synthesis strategy, thereby optimizing catalytic
performance. In this study, citric acid (CA) was used as the ligand
and a series of Fe/ZrO 2 catalysts were synthesized by varying
the CA/Fe molar ratio (0, 0.25:1, 0.5:1, 1:1, and 2:1) to systematically
investigate the effect of ligand dosage on the transformation of active
Fe phases and Fischer–Tropsch performance. The structure–performance
relationship was elucidated using XRD, TEM, BET, XPS, H 2 -TPR, and Mössbauer spectroscopy. Results revealed that an
appropriate CA dosage (1:1) significantly improved the dispersion
of Fe nanoparticles, promoted the formation of Fe–O–Zr
interfacial structures and oxygen vacancies, lowered the reduction
temperature of FeO x species, and enhanced
CO adsorption capacity. These factors collectively facilitated the
formation of a high content of the χ-Fe 5 C 2 active phase, resulting in the highest CO conversion and C 5+ hydrocarbon selectivity. The catalyst with a CA/Fe molar ratio of
1:1 exhibited the best performance, achieving a steady-state CO conversion
of 42.6% and a C 5+ selectivity of 46.5% after 192 h on
stream, which are significantly higher than those of the unmodified
catalyst (CO conversion 23.2%, C 5+ selectivity 36.4%).
In contrast, insufficient CA dosage (0.25:1, 0.5:1) led to nonuniform
dispersion of Fe species on the support surface, reduced surface area,
and limited interfacial synergy. Excessive CA (2:1), although maintaining
high dispersion, could impede the reduction pathway and cause unfavorable
structural evolution, ultimately reducing catalytic performance. Overall,
the study demonstrates the existence of an optimal CA dosage window,
with the 1:1 molar ratio condition achieving synergistic optimization
of Fe electronic structure and interfacial activity, leading to high
CO conversion in Fischer–Tropsch synthesis. These findings
provide robust experimental evidence for the application of organic
ligand-assisted green synthesis strategies in controlling the active
phase transformation and performance optimization of iron-based catalysts,
as well as offering new insights and approaches for the design of
green and efficient Fischer–Tropsch synthesis catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Cheng Gu,Yakun Qu,Ya Chen,Yunlong Wang,Chaowen Liu,Le Zhang,Xiangyang Cui,Xiaoguang Zhao,Enhui Xing,Yibin Luo,Zhen Chen,Junhua Li
Framework Fe-ZSM−5 was developed for catalytic CO 2 desorption from MEA. • Isolated tetrahedral Fe 3+ sites were incorporated into the MFI framework. • Framework Fe reduced Fe dissolution in MEA by more than 88% over 120 °C for 15 days. • Fe-ZSM−5 increased the average CO 2 desorption rate by 35% over the blank case under continuous operation. • Lewis acid-base pairs promote H 2 O-assisted carbamate decomposition. Catalytic CO 2 desorption from aqueous amine solvent is a promising strategy for energy-saving CO 2 capture from industrial flue gas. As an important candidate, conventional zeolite catalysts often suffer from insufficient activity, while metal incorporation can effectively regulate acidity but also causes metal-site dissolution. Herein, we prepared an excellent ZSM-5 zeolite with framework-incorporated Fe (Fe-ZSM−5) through feasible hydrothermal method. The coordination characterizations confirm that Fe-ZSM−5 contains isolated, tetrahedrally coordinated Fe 3 + within the MFI framework. Compared to impregnated Fe, the dissolution rate of framework Fe species in ethanolamine absorbent was reduced by more than 88%, which can effectively enhance catalytic performance and simultaneously avoid solvent degradation. Meanwhile, the incorporation of framework Fe modifies the acidic environment of the zeolite by generating Si-OH-Fe Brønsted acid sites and Fe-related Lewis acid sites. Fe-ZSM−5 exhibited high catalytic activity for CO 2 -rich MEA solution, with a peak desorption rate of 4.306 mmol·min −1 (48% higher than the blank case); the catalytic rate constants reach 2.0–2.4 × 10 −4 min −1 . This work proposes a novel design strategy for high-performance acid catalysts, representing a durable and efficient catalyst for reducing regeneration energy in amine-based CO 2 capture. Download: Download high-res image (299KB) Download: Download full-size image
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JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Kailin Fu,Weijian Chen,Jianmin Liu,Jian Liang
Perovskite oxides are increasingly recognized as cost-effective catalytic materials for facilitating both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at the air-electrode electrode of Zn-air batteries (ZABs) and fuel cells. In this study, we have employed a non-hydrolytic sol-gel (NHSG) technique to synthesize La 0.8 Sr 0.2 Co 0.8 X 0.2 O 3-δ (X = Fe, Mn, and Ni) perovskite nanoparticles at a low temperature of 600 °C. Among these perovskite oxides, La 0.8 Sr 0.2 Co 0.8 Fe 0.2 O 3-δ (LSCFO) exhibited the highest specific surface area of 12.68 m 2 g −1 and possessed the greatest number of oxygen vacancies. Specifically, it achieved a higher half-wave potential of 0.657 V for ORR. Meanwhile, it exhibited a lower OER overpotential of 418 mV at a current density of 10 mA cm −2 , along with the smallest ΔE value of 0.991 V. When utilized as an air electrode catalyst for ZABs, LSCFO exhibits a high peak power density of 152.2 mW cm −2 and remarkable long-term cycling stability (100 h at 2 mA cm −2 ), which are close to the performance metrics of commercial Pt/C + RuO 2 catalysts. This study demonstrates the potential to enhance the bifunctional catalytic activity of LaCoO 3 -based perovskite air electrodes for ZABs through a straightforward doping approach within a NHSG process.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yongxiang Jiang,Yang Liu,Jia Bao,Xin Wang,Xiaomin Hu
Emerging Contaminants (ECs) in water bodies pose significant environmental concerns. Adsorption technology, known for its low cost, high efficiency, and ease of use, is a promising solution for ECs removal. This study investigated the adsorption performance of MIL-101(Fe), an iron-based metal-organic framework (MOF), for ECs with different molecular sizes. Sodium p-perfluorous nonenoxybenzenesulfonate (OBS), diclofenac sodium (DCF), and tetracycline hydrochloride (TCH) were selected as representative ECs, covering PFAS substitutes, NSAIDs, and antibiotics. MIL-101(Fe) exhibited specific surface area, excellent mesoporous structure and abundant surface active sites, enabling efficient adsorption. Under optimized conditions (pH = 5.8, 6, and adsorbent dosages 9, 40, 20, and 20 mg), removal efficiencies for OBS, DCF, and TCH reached 95.9 %, 97.5 %, and 86.4 %, respectively. Cyclic tests showed stable performance after five adsorption-desorption cycles. Kinetic studies indicated that OBS followed a pseudo-first-order model, while DCF and TCH adhered to a pseudo-second-order model. The maximum adsorption capacities for OBS, DCF, and TCH were 945.1, 1595.9, and 439.5 mg·g −1 , respectively. Adsorption mechanisms revealed that smaller molecules like OBS and DCF easily entered the mesopores, while larger TCH molecules faced diffusion restrictions. The molecular interactions among OBS, DCF, and TCH involved electrostatic attraction toward -SO₃ − groups and pore filling in OBS, diffusion into the pore interior followed by hydrogen bonding with -NH₂ and π-π stacking in DCF, and surface-confined hydrogen bonding with -OH/-NH₂ and π-π interactions in TCH. This study provided a theoretical basis for efficient treatment of ECs with various molecule structures by Fe-MOFs adsorption materials.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xueyan Li,Chaojie Lyu,Dandan Cui,Senlong Zhang,Jiarun Cheng,Hanyu Guo,Chaojie Lyu,Yiming Liu
For the intrinsic limitations of CoP in alkaline water splitting (irrational electronic structure, poor conductivity, and agglomeration-caused low active site utilization), this work puts forward a bifunctional optimization strategy: "Fe-doping electronic modulation coupled with rGO support synergistic enhancement", and synthesizes the Fe-CoP@rGO composite catalyst (Fe-doped CoP nanoparticles anchored on rGO) via wet-chemical method and phosphidation. The introduction of Fe induces electron rearrangement by substituting Co atoms in CoP lattice significantly increases the proportion of highactivity Co 3+ sites and optimizes the adsorption energy barriers of *H/*OH intermediates. Meanwhile, the high conductivity of rGO constructs an efficient electron transport network, and its large specific surface area inhibits nanoparticle agglomeration through steric hindrance, enhancing the electrochemical active surface area (ECSA) twice that of pure CoP.Bifunctional catalytic performance tests show that Fe-CoP@rGO achieves low overpotentials of 86.2 mV (HER) and 285 mV (OER) at 10 mA cm -2 , which are significantly superior to those of CoP@rGO. When assembled into an overall water splitting device, it only requires 1.61 V to reach 10 mA cm -2 , with no performance degradation after 24 h of continuous operation in 1 M KOH and a Faraday efficiency close to 100%. This study provides a clear structure-activity relationship and a scalable optimization pathway for designing high-performance and stable non-noble metal bifunctional electrocatalysts through the synergistic effect of electronic structure modulation and support function enhancement
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Analytical Methods
·
2025
·
IF 2.6
Tiechun Li,Mengjia Guo,Weiwei Luo,Quanping Diao,Linlin Lv,Pinyi Ma
Nitrite (NO2−) has been extensively utilized in the food industry as a preservative and colorant; however, excessive intake can lead to serious health issues, highlighting the need for accurate and efficient detection methods. In this work, blue fluorescent iron and nitrogen co-doped carbon dots (Fe/N-CDs) were synthesized via a one-step hydrothermal method using ferric chloride, ethylenediaminetetraacetic acid (EDTA), and diethylenetriamine (DETA) as precursors. The prepared Fe/N-CDs exhibited excellent peroxidase-like activity. By leveraging the catalytic activity of Fe/N-CDs and the oxidation and diazotization reactions induced by NO2−, we developed a dual-mode fluorescent and ratiometric colorimetric sensor for nitrite detection. The fluorescence and colorimetric methods had linear detection ranges of 2.5–75 μM and 2.5–100 μM, with detection limits of 0.68 μM and 1.19 μM, respectively. The developed dual-mode sensing platform was successfully applied to detect NO2− in both pickled vegetable and cured pork samples, demonstrating its feasibility in practical applications. Furthermore, the color of the reaction changed from blue to yellow as the NO2− concentration increased. Quantitative nitrite analysis was further achieved by capturing RGB values with smartphone-assisted color-recognition software, using the green-to-red (G/R) ratio as the analytical signal.
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高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Jie Zhang,Haishun Liu,Xiang Zhang,Li Ma,Weiming Yang
The metastable energy state and abundant active sites in Fe-based amorphous alloys (FAAs) make them promising catalysts. Surface atomic states may affect the catalytic performance of FAAs as well as the internal long-range disordered atomic structure. This paper investigates how laser surface processing affects the phenol degradation performance of industrial Fe 78 Si 9 B 13 amorphous ribbon. Suitable laser processing obviously improves the phenol degradation performance, and 40 W laser processing leads to the most significantly improved kinetic rate, which reaches 0.82 min −1 , much higher compared to former Fe-based catalysts even with less catalyst dosage; moreover, the degradation rate also maintains over 98 % after 18 cycles. The lower activation energy, the abundant active sites, and more ·OH generation with suitable laser processing, are responsible for this degradation improvement. This study reports the improved phenol degradation performance of Fe-based amorphous ribbon by laser processing and further discloses related mechanisms, which provides a feasible strategy obtaining efficient and durable FAAs catalysts in improving the quality of phenol-containing wastewater.
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JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Bing Zhang,Qiuhua Chen,Heli Tang,Rongqing Qi,Wenxin Shi
The persistent challenges of membrane fouling and insufficient removal of emerging pollutants remain significant barriers to the widespread adoption of ultrafiltration processes. Therefore, a pre-oxidation system combining Fe(II)-activated persulfate with micro-nano bubble enhancement (MBs/Fe(II)/PS) was developed to alleviate membrane fouling and efficiently remove acetochlor (AC). The results demonstrated that, under conditions where Fe(II) and persulfate (PS) were applied at concentrations of 15 μM and 30 μM respectively, the MBs/Fe(II)/PS pre-oxidation system outperformed the Fe(II)/PS pre-oxidation system in mitigating both reversible and irreversible membrane fouling caused by natural organic matter (NOM) mixture. The superior fouling mitigation capabilities of the MBs/Fe(II)/PS system can be primarily attributed to the coagulation effect of in-situ generated Fe(III) and the oxidation mechanisms involving free radicals. Furthermore, the MBs/Fe(II)/PS pre-oxidation process effectively reduced foulant accumulation on the membrane surface while decreasing interfacial free energy between foulants and the membrane. This transition facilitated a shift from cake filtration to complete blocking or intermediate blocking modes. Additionally, the MBs/Fe(II)/PS pre-oxidation system exhibited optimal performance in degrading NOM and AC due to the presence of SO 4 •– , •OH, and 1 O 2 . This study introduces a novel pre-oxidation strategy for mitigating membrane fouling and eliminating emerging pollutants, providing a theoretical basis for the practical application of MBs-based pre-oxidation technology.
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Materials Today Communications
·
2025
·
IF 4.5
Biying Zhong,Dingjun Wang,Xiaotong Lai,Xiao Huang,Qiaowen Wang,Xinghan Ren,Xinyue Shen,Li Liu,Tiantian Liu
In recent years, the burden of disease caused by Staphylococcus aureus and Escherichia coli infections has been significant. Currently, the development of antibiotics faces severe challenges, as the long-term misuse of traditional antibiotics has accelerated the evolution of resistance, while the pace of novel drug development lags far behind the rate of bacterial evolution. Therefore, the development of new antibacterial agents is urgently needed. This study presents a metal-organic framework composite material loaded with zinc oxide and kaempferol (MIL-101(Fe)@Zn-KF). The prepared material was characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ultraviolet-visible spectrophotometry (UV-Vis), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and zeta potential analysis. Peroxidase-like activity, biosafety and antioxidant property of the composite were evaluated. The in vitro antibacterial effect of the composite against Staphylococcus aureus and Escherichia coli was investigated using the plate coating method and bacterial growth curves experiment. The synthesized material exhibited multifunctionality, such as enzyme-like activity, antibacterial property and antioxidant capacity. Compared to MIL-101(Fe)@Zn, MIL-101(Fe) and kaempferol alone, the MIL-101(Fe)@Zn-KF composite demonstrated superior antibacterial effect, with inhibition rate of 98.76% and 98.34% against Staphylococcus aureus and Escherichia coli , respectively. MIL-101(Fe)@Zn-KF was able to catalyze hydrogen peroxide to generate reactive oxygen species, which synergized with the composite itself to exert bactericidal effect. Systematic evaluation of the cytotoxicity and hemolytic effect of MIL-101(Fe)@Zn-KF revealed the excellent biosafety and clinical potential of the composite. In summary, the composite material synthesized in this study combined peroxidase-like activity, antibacterial performance, antioxidant capacity and excellent biocompatibility, providing new insights for the development of efficient and safe antibacterial materials.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Sizhi Ding,Hua Ning,Weitao Shi,Ruojiang Liu,Ziqi Liu,Jiakun Yang,Yuanxin Tan,Yi Fan,Haizhen Liu,Jin Guo,Zhiqiang Lan
In this study, a three-dimensional honeycomb Fe/N-MXene composite was prepared by heating the mixture of the prefabricated honeycomb N-MXene composite with Fe 4 [Fe(CN) 6 ] 3 (referred to as PB tube). Subsequently, it was introduced to enhance the hydrogen storage properties of MgH 2 through ball milling. Experimental results demonstrate that the initial dehydrogenation temperature of the MgH 2 +Fe/N-MXene composite system is 198 °C, which is significantly lower than that of pure MgH 2 . Additionally, the absorption/dehydrogenation activation energies of MgH 2 +Fe/N-MXene composites were reduced by 50.9 kJ mol −1 and 68.1 kJ mol −1 , respectively, compared with MgH 2 . After 20 min at 100 °C, 5.14 wt% H 2 is absorbed. Mechanism analysis reveals that the presence of Fe prolongs the length of the Mg–H bond and weakens its bond energy. The unique honeycomb structure of N-MXene provides more nucleation sites for hydrogen atoms for adsorption and storage. Under the catalytic action of Fe/N-MXene composite, the hydrogen storage capacity of MgH 2 is significantly improved.
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