Journal of Materials Chemistry A
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2026
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IF 9.5
liang wu,Na Wang,Yifeng Xiao,Qiankun Zhang,Guangyao Yang,Zhi He,Xiyue Kang,Yao Jiang,Yuehui He
Direct seawater electrolysis represents a pivotal technology for green hydrogen production. However, achieving efficient and stable cathodic heterostructures capable of maintaining long-term stability under industrial current densities remains a significant challenge. This work reports an in situ constructed Ni-Cr-Fe-Mo heterostructure derived from four transition metal powders, which feature multilevel catalytic heterointerfaces and abundant multifunctional active sites. The heterostructure demonstrates sustained hydrogen evolution for 50 hours at 2 A cm -2 in alkaline and neutral seawater electrolytes, while exhibiting exceptional performance under amperelevel current densities. Density functional theory (DFT) calculations reveal that two distinct active sites at the multiscale Ni-Cr-Fe-Mo heterointerfaces synergistically accelerate the hydrogen evolution reaction (HER) through a relay catalysis mechanism: one site facilitates H 2 O cleavage and the other promotes H 2 synthesis. This cooperative process not only optimizes reaction kinetics but also enhances corrosion resistance, enabling persistent high-efficiency seawater electrolysis. The study provides fundamental insights into the mechanisms driving long-term operational stability and offers a novel paradigm for developing durable heterostructures for industrial-scale seawater hydrogen production.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
Geng Zhang,Bolong Jiang,Decheng Lu,Xueqin Wang,Yuanyuan Wang,Hua Song
The sluggish kinetics of the oxygen reduction reaction (ORR) at the cathode severely limits the electricity generation and pollutant degradation of microbial fuel cells (MFCs). Herein, we report a facile one-pot pyrolysis strategy for fabricating a highly dispersed iron-embedded N/S co-doped hierarchical porous carbon catalyst (FeSNC) with accessible Fe−N 4 −S active sites using tetramethylammonium hydroxide (TMAH)-optimized Fe-ZIF-8-N-H precursors. TMAH enables rapid synthesis (16 min), 3.6-fold yield enhancement, mesopore engineering for efficient Fe 2+ capture and dense Fe−N 4 −S site formation, and hierarchical pore construction for accelerated mass/electron transport. The Fe source (NH 4 ) 2 Fe(SO 4 ) 2 ·6 H₂O synchronously introduces N and S to optimize pyridinic N and Fe−N x coordination. Theoretical calculations reveal that S-doping modulates the electronic structure of the central Fe, while mesopore-induced defects act as a secondary modulator, collectively establishing a dual-modulation mechanism to optimize the adsorption/desorption of ORR intermediates. The 6 %FeSNC-N-H catalyst outperforms commercial Pt/C in ORR across neutral/alkaline/acidic media and, as an MFC cathode, delivers a peak power density of 987.0 ± 5.3 mW cm⁻², 96.75 % COD removal, and high degradation efficiency for phenol (93.4 %) and methylene blue (95.6 %). This work underscores the critical synergy between of metal centers electronic microenvironment and nanostructural pore engineering for advanced electrocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.3
Guilian Li,Jintong Guo,Daming Yang,Hongji Xu,Linglong Hu,Shuo Geng,Ming Feng
Sluggish oxygen evolution reaction (OER) kinetics impede alkaline electrolysis. Here, vertically aligned Ru-decorated, Fe-doped Ni 3 S 2 nanowire arrays on Ni foam (Ru-NFS) are synthesized via a one-step hydrothermal route. Distinct from conventional Ni 3 S 2 →NiOOH systems, we operate in a low-Ru, Fe-co-modulated regime where Ru remains S-ligated and highly dispersed, evidenced by the absence of Ru-Ru scattering in EXAFS. This coordination accelerates NiOOH formation, enhances charge transfer, and mitigates Ru loss, yielding Ru-normalized activity beyond single-modulated controls. In 1.0 M KOH (iR-corrected), Ru-NFS requires only 206 and 245 mV to reach 10 and 100 mA cm -2 , respectively, and sustains stable operation. Mechanistically, COHP analysis shows that Fe substitution and, more strongly, Ru incorporation progressively weaken Ni-S bonds in the precursor, enabling rapid anodic reconstruction to NiOOH. On the reconstructed surface, DOS/PDOS reveal a d-manifold shifted toward EF with increased states, implying higher hole availability and optimized M-O covalency for coupled proton-electron transfer. DFT-CHE at 1.23 V (RHE) identifies *O→*OOH as the thermodynamic RDS, with ΔG reduced from 0.70 eV (NiOOH) to 0.48 eV (Fe-NiOOH) and 0.38 eV (Ru,Fe-NiOOH). Overall, Ru-Fe co-modulation couples reconstruction control with adsorbate-binding optimization, providing a blueprint for robust high-rate OER anodes.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
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IF 3.9
Mengyu Wang,Shuhan Zhang,Chaoyue Meng,Fenglei Han
To enhance the conversion efficiency and product selectivity in CO2 hydrogenation to methanol, we prepared a series of Cu–Fe bimetallic catalysts with varied Cu/Fe ratios supported on HZSM-5 by an initial impregnation method and evaluated them in a dielectric barrier discharge (DBD) nonthermal plasma reactor. Among these, the Cu7Fe3/HZSM-5 catalyst achieved a CO2 conversion of 12.1% and a methanol selectivity of 9.6% in plasma-assisted CO2 hydrogenation, with activity decay below 3% over 400 min of continuous operation. The catalyst structure and surface properties were systematically investigated by SEM, XRD, BET, XPS, H2-TPR, CO2-TPD and CO-TPD. Catalytic performance was assessed under optimized plasma reaction conditions (CO2/H2 = 1:3, total flow 70 mL·min–1, discharge power 20 W, circulating water temperature 30 °C). Furthermore, in situ DRIFTS indicated an oxygen vacancy-dominated formate pathway: oxygen vacancies in FeOx strengthened CO2 chemisorption and induced polarization of the C═O bond; Cu+ sites facilitated sequential hydrogenation of formate intermediates (HCOO*); and the Cu0-HZSM-5 interface optimized H* spillover, collectively suppressing CH4 formation. These results underscore that vacancy engineering and metal–zeolite interfacial effects are pivotal in steering plasma-catalytic CO2-to-methanol selectivity.
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MICROCHEMICAL JOURNAL
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2026
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IF 5.1
Zhiguang Yang,Zexiang Liu,Ke He,Qianqian Chen,Chenxue Yao,Qiaohuan Cheng,Huiqiang Li,Renjie Wang,Zhiwei Zhao,Xiaochen Li
Given that dopamine (DA) is an essential neurotransmitter for regulating physiological functions, the accurate detection of its concentration is critical for diagnosing neurological disorders. With their tunable pore structures and ultrahigh specific surface area, MOFs are an ideal candidate for electrochemical DA sensing. However, their inherent poor electrical conductivity and insufficient structural stability remain the major bottlenecks hindering practical application. In this study, a two-dimensional hollow leaf-structured ZIF-PDA-Fe composite was successfully constructed through a synergistic strategy of polydopamine (PDA) modification and iron (Fe) doping. Subsequently, a short (10 min) dielectric barrier discharge (DBD) plasma treatment was applied to enhance its electrochemical DA sensing performance. Characterizations revealed that the DBD-treated ZIF-PDA-Fe-10 not only retained the original crystalline and morphological structure but also exhibited a significant increase in the content of surface Fe O and Zn O functional groups. Notably, a 55.7% reduction in charge transfer resistance (Rct) was achieved, indicating a marked acceleration of electron transfer kinetics. The preserved hollow porous framework, combined with the functionally modified surface, further facilitated DA mass transport-collectively contributing to a synergistic enhancement of the electrochemical response. The resulting sensor demonstrated a wide linear detection range for DA (1–400 μM) with a low detection limit of 0.93 μM. It also showed excellent selectivity against interfering substances (ascorbic acid and uric acid) and maintained 80% signal stability over 100 continuous cycles, outperforming conventional pyrolysis-derived counterparts. This work thus provides a novel strategy for the surface engineering of MOF-based electrochemical sensors.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 8.3
Wenyao Xue,Ziyue Wang,Hongliang Fu,Guanjie Xue,Jing Zhao,Yue Lian,Zhifeng Wang,Yongfeng Hu,Huaihao Zhang
Four-electron transfer process of oxygen evolution reaction (OER) has become a bottleneck restricting water electrolysis, due to its inherently high kinetic energy barrier. Therefore, the exploration for high-efficiency and long-term stable non-noble metal OER catalysts is crucial for sustainable energy conversion. This work designs a molten salt-mediated ball milling-pyrolysis stepwise treatment to synthesize spongy V 2 O 5 composite Fe-intercalated graphitic nitrogen (N–V 2 O 5 @FeC). Specifically, Fe-intercalated graphite is achieved using the FeCl 3 /KCl molten salt system, a highly conductive FeC substrate being constructed accordingly. Then, NH 3 generated from melamine pyrolysis enables spongy porous structure construction and N-doping. N–V 2 O 5 @FeC catalyst possesss the following advantages: First, spongy porous structure greatly increases exposure of active sites, while Fe intercalation-induced graphite edge defects and Fe–O–V bonds jointly enhance active site density of V 2 O 5 composite, thereby boosting catalyst activity. Second, N-doped carbon network improves electron transport performance, enabling catalyst's charge transfer resistance decline to 19.9 Ω. Moreover, dual stabilization mechanisms of Fe–O–V stable structure and chemical anchoring of V–O–C bonds endow the material with good structural stability under alkaline conditions. In detail, N–V 2 O 5 @FeC reaches 10 mA cm −2 current density at only 299 mV overpotential in alkaline solution, with low Tafel slope (53.0 mV dec −1 ) and 50-h stability.
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JOURNAL OF FLUORESCENCE
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2026
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IF 3.4
Gu Jianlong,Gao Li,Cai Jieyun,Liu Yuchen,Meng Hongming,Long Jie,Ma Jing,Yang Bing,Wang Chunqiong,Yang Yaling
Carbon dots-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic carbon dot nanoenzymes (Cur/Cu, Fe@CDs) that promote the chemiluminescence signal of luminol were synthesized. Cur/Cu, Fe@CDs possess high peroxidase (POD) activity and can catalyze the luminol/hydrogen peroxide reaction to generate a strong chemiluminescence intensity, which is approximately 8.98 times higher than the chemiluminescence spectral signal produced by the same concentration of K 3 [Fe(CN) 6 ]. Additionally, a sensitive and rapid method for detecting magnesium ions (Mg 2+ ) was developed by leveraging the enhancing effect of Mg 2+ on the CL signal in this system. The proposed CL technique for Mg 2+ demonstrated a linear response range from 3.33 to 166.67 µM and a detection limit of 0.99 µM. Moreover, the method was successfully applied to analyze Mg 2+ in cigarette paper samples through a spiking procedure, achieving a recovery rate of 91.1% to 109.0%. This research offers substantial evidence supporting the advancement of efficient and sensitive platforms for Mg 2+ CL detection.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Ping-an Yang,Sihao Tan,Haibo Ruan,Li Wang,Xin Huang,Qiqiao Yang,Mengjie Shou,Qiuhong Zhou,Dengfeng Li
s An electromagnetic parameter inversion strategy using a fixed magnetic permeability can effectively predict and guide the design of low-frequency microwave absorption (MA) properties in magnetic/dielectric composite materials. However, permeability instability caused by material modification hinders precise design. To address this issue, this study adopts heterostructure engineering and first uses the experimentally measured permeability of carbon-coated iron nanowires (Fe NWs@C, abbreviated as FC) as a fixed parameter. Through inversion analysis, the target range of dielectric constants required to achieve an effective 3 GHz absorption bandwidth in the low-frequency band was determined. To address susceptibility to permeability fluctuations during dielectric tuning, antiferromagnetic nickel oxide is introduced to construct Fe NWs@C/NiO (abbreviated as FCNO) heterostructures based on FC via co-deposition and laser ablation. Leveraging NiO's antiferromagnetic nature with zero net magnetic moment and its dielectric properties, precise tuning of the dielectric constant was achieved with minimal disturbance to the original magnetic permeability. Experimental results and data analysis indicate that the FCNO1(the atomic molar ratios of Fe:C:Ni =1:1:0.1) absorber exhibits a minimum low-frequency reflection loss of −45.49 dB at a thickness of 4.8 mm, with an effective absorption bandwidth reaching 3.12 GHz at 5.45 mm, consistent with predictions. Furthermore, the FCNO3(the atomic molar ratios of Fe:C:Ni =1:1:0.3) absorber shows only a 2.06% deviation between the predicted and measured frequencies corresponding to its minimum reflection loss, and only a 4.17% deviation in its effective absorption bandwidth. This work proposes an inversion strategy that introduces antiferromagnetic components to achieve dielectric tuning without perturbing magnetic permeability, providing a viable pathway for optimizing the low-frequency MA performance of magnetic/dielectric composite materials.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2026
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IF 2.6
Xu Xiaobin,Gao Qiang,Ma Yue,Dong Chengwei,Ye Bing,Zhou Fei
M142 aluminum alloy, commonly used in piston systems, exhibits inadequate performance under prolonged high-temperature and high-load conditions. This study developed a TiO 2 nanoparticle-reinforced Ni-Fe composite coating via electrodeposition to address this. The effect of FeSO 4 ·7H 2 O concentration on Ni-Fe coatings was first investigated. The results show that hardness increased with FeSO 4 ·7H 2 O concentration, while the wear rate initially decreased and then increased. Adding TiO 2 nanoparticles effectively mitigated the adverse effects of high Fe content, leading to a dense, homogeneous composite structure (NFT15). Compared to the NF25 coating, the TiO 2 -reinforced coating demonstrated a 19.5% increase in hardness, a 30% improvement in adhesion strength, and a 30.9% decrease in wear rate. It also exhibited superior thermal stability, maintaining structural integrity and showing a 41.7% hardness increase after thermal cycling. Finally, a multi-performance evaluation identified the composite coating with 15 g L −1 TiO 2 as possessing the optimal overall properties.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Lan Zhao,Chunhong Li,Nengcong Pan,Yuhan Lei,Muhammad Aizaz Ud Din,Nanpu Cheng
MOF-derived Fe-doped Ni 9 S 8 nanoparticles are uniformly anchored on N-rGO. • The synergistic effect at the heterointerface enhances electron transfer and active site exposure. • Fe 0.1 -Ni 9 S 8 /N-rGO achieves an overpotential of 255 mV at 50 mA cm −2 . • Fe doping shifts the d-band center down, weakening *O adsorption and lowering the RDS barrier. Developing effective, low-cost oxygen-evolution catalysts is essential for sustainable energy technologies. Here, we synthesized an N-doped reduced graphene oxide-supported, Fe-doped Ni 9 S 8 catalyst (Fe 0.1 -Ni 9 S 8 /N-rGO) by MOF-derived pyrolysis followed by sulfidation. To separate the effects of Fe-induced electronic modulation from N-rGO–assisted interfacial engineering, we prepared a series of control samples: Ni 9 S 8 , Ni 9 S 8 /N-rGO, Fe 0.1 -Ni 9 S 8 , and Fe 0.1 -Ni 9 S 8 /N-rGO. The optimized Fe 0.1 -Ni 9 S 8 /N-rGO exhibited efficient OER electrocatalysis, delivering 50 mA cm −2 at an overpotential of 255 mV with a Tafel slope of 54.58 mV dec −1 . Synergistic Fe doping and the Ni 9 S 8 /N-rGO heterojunction enhanced conductivity and increased active-site exposure, yielding higher activity. Electronic-structure analysis showed that Fe doping shifts the d-band center and tunes the interaction strength with key OER intermediates, which lowered the energy required for oxygen evolution. This work presents a logical strategy for designing high-performance, nonprecious-metal OER catalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Mutian Zhang,Ziying Ji,Xing Wang,Yulin Ouyang,Zening Yang,Siyuan Zhou,Miao Zeng,Wei Zheng,Jiajia Wang,Guobing Ying
Understanding the catalytic mechanisms of the alkaline hydrogen evolution reaction (HER) is essential for the rational design of efficient catalysts. In this work, Fe/Ni-doped Co 3 O 4 systems were investigated by combining DFT+U calculations with experimental validation. Theoretical simulations reveal that both dopants induce spin-state transitions in Co 3+ , tune orbital hybridization, and redistribute reaction energy barriers across elementary steps rather than uniformly lowering them on the Co 3 O 4 (110) surface. Hydrothermally synthesized Fe-Co 3 O 4 and Ni-Co 3 O 4 microflower spheres confirm these predictions: Ni doping lowers the overall reaction barrier by optimizing the electronic structure and adsorption energetics associated with high-spin Co 3+ , leading to a reduced onset overpotential, whereas Fe doping facilitates water dissociation via enhanced spin polarization, thereby lowering the rate-determining barrier and improving kinetics at high current densities. Further analyses identify reliable descriptors for different catalytic advantages: the overall reaction barrier, d -band center, and covalent bonding degree of water adsorption serve as indicators of thermodynamically favorable catalysts with low overpotential, whereas the rate-determining step barrier and d-p coupling are key descriptors of kinetically favorable catalysts with enhanced current-density performance. This study clarifies the step-specific roles of spin-state modulation and provides a framework for catalyst design based on energy barrier redistribution.
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Surfaces and Interfaces
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2026
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IF 6
Sawaira Adil,Muhammad Naveed Afridi
Novel FMAB-MX beads were developed for efficient phosphate removal and recovery. • The Langmuir maximum phosphate adsorption of 155 mg P g⁻¹ was achieved. • Pseudo-second-order kinetics confirmed a chemisorption process. • Phosphate binding via electrostatic attraction and Fe/Mg chemisorption. • FMAB-MX achieved ∼90% phosphate recovery with excellent reusability. The present study explores a novel Fe/Mg-functionalized alginate–MXene composite bead (FMAB-MX) as an efficient adsorbent for phosphate removal and recovery from water. The physicochemical properties and surface chemistry of FMAB-MX were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) analysis, X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) to elucidate its structural characteristics and adsorption mechanisms. FMAB-MX achieved phosphate removal efficiency of up to 82% in batch tests, demonstrating approximately 64- and 20-fold higher removal efficiency than MXP and MXB, respectively. FMAB-MX exhibited a maximum adsorption capacity of 155.1 mg P g⁻¹ (475.3 mg PO₄ g⁻¹), whereas FMP-MX showed 64.2 mg P g⁻¹ (196.8 mg PO₄ g⁻¹). Isotherm and kinetic modeling showed that phosphate adsorption onto FMAB-MX was best described by the Langmuir isotherm and pseudo-second-order model, respectively, suggesting monolayer adsorption behavior. FMAB-MX also exhibited high resistance to interference from inorganic anions commonly found in natural water. Furthermore, approximately 89% of the adsorbed phosphate was recovered under mild alkaline conditions, demonstrating excellent reusability and stability over five successive cycles. These findings indicate that FMAB-MX beads represent a sustainable and efficient adsorbent for nutrient recovery and advanced water treatment applications while providing a novel contribution to the still-limited literature on alginate-crosslinked MXene composites for phosphate removal and recovery. Download: Download high-res image (256KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）