CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yunlong Yao,Peng Zhang,Yao Wang,Zhou Du,Zhichao Sun,Ying-Ya Liu,Anjie Wang
This study investigates the catalytic hydrogenation of biomass-derived furfural to value-added products, especially tetrahydrofurfuryl alcohol and furfuryl alcohol. A series of Ni-Fe-Al composite catalysts were synthesized through co-precipitation and subsequent hydrogen reduction. Among these, the Ni 5 Fe 1 Al 2 catalyst demonstrated extraordinary catalytic performance, achieving complete furfural conversion and 92.9 % tetrahydrofurfuryl alcohol selectivity under mild conditions (50 °C, 0.5 MPa H 2 ). Comprehensive characterization using XRD, TEM, and XPS revealed that the optimized Ni 5 Fe 1 Al 2 –400 catalyst possessed high dispersion and abundant oxygen vacancies. The addition of pyridine in the feed had a great impact on the hydrogenation rate of furfuryl alcohol but much less on that of furfural. With pyridine in the feed, the main product shifted from tetrahydrofurfuryl alcohol to furfuryl alcohol, while maintaining complete furfural conversion and achieving 97.5 % furfuryl alcohol selectivity at 50 °C. The Ni 5 Fe 1 Al 2 –400 deactivated in the 50-h run and can be regenerated by simple in-situ reduction, demonstrating excellent regenerability. These findings provide valuable insights into the design of efficient catalysts for selective biomass conversion.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Zhengang Zhou,Junjie Zheng,Lingyu Shao,Xiao Zhang,Chengjin Pan,Xiuqi Hu,Kai Feng,Hao Song,Shihan Zhang,Chenghang Zheng,Xiang Gao
Catalytic solvent regeneration has garnered significant attention due to its capacity to lower energy demands in industrial processes, promoting broader adoption of carbon capture systems. While progress has been made in catalyst engineering, creating efficient solid acid catalysts still encounters critical obstacles such as synthesizing mesoporous architectures with extensive surface areas and improving the spatial arrangement of active sites. Herein, this study developed a Ni/Fe@KIT-6 catalyst with ordered porosity and dual metal acid sites, leveraging the three-dimensional cubic pore structure of mesoporous silica to enhance liquid-solid mass transfer. The anchored Ni/Fe clusters synergistically enhanced proton transfer, reducing the activation energy of carbamate decomposition through optimized intermediate adsorption configurations. Catalytic testing revealed a 58.1 % enhancement in CO₂ desorption efficiency alongside a 41.2 % decrease in energy requirements relative to non-catalytic systems. The material maintained stable performance across multiple absorption-desorption cycles (efficiency decline <10 %), linked to the KIT-6 framework's retained structural stability and optimized metal-support bonding. Theoretical calculations revealed that the Ni/Fe dual sites lowered the CO 2 desorption reaction energy barrier, aligning with the enhanced CO₂ desorption efficiency. This synergistic interaction of dual metal acid sites within a high-surface-area architecture highlights viable pathways for scalable and energy-efficient CO₂ desorption, thereby advancing practical strategies for large-scale deployment of carbon capture technologies.
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Advanced Science
·
2025
·
IF 14.1
Siqi Qiu,Hao Wan,Yuechao Yao,Xiao Xu,Zhangjian Li,Yongbiao Mu,Biaolin Peng,Hongliang Wu,Jizhao Zou,Lin Zeng
Iron-nitrogen-carbon (Fe-N-C) materials are promising non-precious metal catalysts for the oxygen reduction reaction (ORR), yet their long-term stability remains a critical challenge due to the dissolution of Fe-based active sites and corrosion of the carbon support. Here, a Fe-Zr dual-atom carbon-based catalyst (Fe,Zr-NC) via a one-step solid-state synthesis method is reported. The introduction of atomically dispersed Zr–N units adjacent to Fe–N 4 centers creates a dual-metal coordination structure that modulates the local electronic environment of Fe and weakens * OH adsorption, which is the rate-limiting step in the ORR process. Density functional theory (DFT) calculations reveal that the Fe–Zr synergy positions the catalyst near the apex of the ORR activity volcano. Extended experimental EXAFS confirms a Fe–Zr distance of ≈3.30 Å, closely matching the theoretical optimum (≈3.39 Å). As a result, Fe, Zr-NC achieves a high half-wave potential (0.891 V vs reversible hydrogen electrode (RHE)) with negligible activity loss over 5000 cyclic voltammetry cycles, outperforming commercial Pt/C. In zinc–air batteries, the catalyst delivers a peak power density of 185.7 mW cm −2 and operates stably for over 453 h. This work highlights the importance of dual-atom synergy in tuning intermediate binding energies and provides design principles for next-generation ORR electrocatalysts.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Yanhao Xu,Ziyi Zhong,Pinle Zhang,Huancheng Huang,Kuan Cai,Xinliang Liu
Persistent organic pollutants (POPs) represent a significant environmental and health risk due to their high toxicity, persistence, strong accumulation potential, and adverse effects on human health. 4-Chlorophenol (4-CP), a type of POP, has low catalytic efficiency at low concentrations and is easily interfered with by other pollutants, making its degradation challenging. A new “recognition-enrichment-in-situ degradation” strategy is introduced to selectively remove chlorophenols from contaminated aqueous environments. In this study, ionic liquids were incorporated into the UIO-66 framework as active sites for selective adsorption. 4-CP contains phenolic hydroxyl groups and exhibits high polarity. The dispersive interactions between 4-CP and ionic liquids, along with hydrogen-bonding interactions between the Tf 2 N anion and the hydroxyl groups of 4-CP, enhance the selective enrichment of 4-CP within the nanocavities of the metal–organic frameworks (MOFs). Fe 3+ was then introduced, enabling in-situ degradation of 4-CP through photo-induced generation of free radicals and cavities from H 2 O 2 catalyzed by Fe-IL@UIO-66. The results indicated that the adsorption capacity of IL@UIO-66 for 4-CP reached 53 %, significantly higher than that for five other organic pollutants. The adsorption capacity of IL@UIO-66 for 4-CP reached 509.5 mg g −1 , 49.9 % greater than that of the original UIO-66. The degradation efficiency of 4-CP by Fe-IL@UIO-66 increased from 61 % to 81 %, and after four cycles, the material retained a catalytic activity with a degradation efficiency of 64.2 %. This study provides valuable insights into the recognition-enrichment-in-situ catalytic strategy for treating low-concentration, highly toxic wastewater.
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Advanced Energy Materials
·
2025
·
IF 26
Zongge Li,Wenjun Kang,Jingkai Lin,Rui Li,Konggang Qu,Suyuan Zeng,Lei Wang,Fanpeng Meng,Huayang Zhang,Haibo Li
The oxygen electrocatalytic activity of transition metal catalysts can be tuned by tailoring their microstructure to optimize electronic configuration. Here, a one-step Coordination-Selective Synthesis strategy is developed to integrate Co single-atom sites and Fe-based nanoparticles within the same matrix, enabling long-range electronic interactions that enhance Co-N 4 reactivity and improve oxygen reduction reaction performance. X-ray absorption spectroscopy confirmed that remote Fe-based nanoparticles modulate the electron distribution at Co-N 4 sites. Structural characterizations reveal that the optimal catalyst, Co 50% Fe 50% -NC, contains metallic Fe, Fe 3 O 4 , and Fe 4 N species. Electrochemical measurements show that it achieves onset and half-wave potentials of 0.984 and 0.927 V versus RHE, surpassing Co 100% -NC with only Co-N 4 sites. Additionally, it demonstrates efficient oxygen evolution reaction performance, achieving an overpotential of 298 mV at 20 mA cm −2 , comparable to RuO 2 . Density functional theory calculations reveal that Fe 4 N optimizes O-containing intermediate adsorption/desorption, lowering the theoretical overpotential. Zn-air batteries assembled with Co 50% Fe 50% -NC exhibited superior performance to Pt/C, highlighting its potential for bifunctional oxygen electrocatalysis. This study provides an approach for designing high-performance catalysts by utilizing synergistic interactions between atomic and nanoscale metal species.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Xingyu Zhong,Baoan Xu,Jianing Li,Weiyu Fang,Yuxuan Shen,Mei Bai,Xiulan Hu
High-efficiency oxygen reduction electrocatalysts is crucial for low-carbon development. Iron-nitrogen co-doped carbon materials (Fe-N-C) prepared from ZIF-8 are well recognized for their remarkable potential to enhance ORR reaction rates. However, the challenge of limited and singular active sites due to insufficient metal loading has impeded the progress of Fe-N-C-based materials. In this paper, the above-mentioned problems were alleviated by introducing a second transition metal (Co, Mn, Zr) to form a bimetallic catalyst with Fe. Carboxylates are also introduced for assistance to generate one-dimensionally entangled carbon nanotubes, then the material can perform charge transfer better. In the alkaline medium, the half-wave potential of FeCo-N-C-OAc synthesized with carboxylate added reached 0.907 V, FeMn-N-C-OAc was 0.893 V, and FeZr-N-C-OAc was 0.892 V, which was improved compared with the samples without carboxylate added. In the range of 100–1000 ppm oxygen concentration, the oxygen sensors based on three catalysts that with carboxylate added showed good linearity and high response currents, especially FeMn-N-C-OAc showed an average response time of 53 s and a relative current fluctuation of only 4 % after 28 days. When improving the performance of Fe-N-C-based catalysts used in coulometric electrolytic oxygen sensors, this work can be regarded as a new strategy.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Ruina Li,Xuwen Li,Qingcheng Liu,Hua Yue,Yang Meng,Yuanyuan Tian
With the continuous advancement of fuel cell technology, the exploration and development of highly efficient non - precious - metal catalysts for the oxygen reduction reaction (ORR) have emerged as a focal point of research. Fe–N–C catalysts have attracted much attention due to their excellent performance and low cost, and coupling single-atom catalysts (SACs) with atomic clusters (ACs) is an effective method to improve catalyst activity. This study used the pyrolysis method to synthesize iron atom catalysts (Fe–N–C SACs) and iron cluster coupled catalysts (Fe–N–C SACs/ACs) on ZIF-8 carbon support. It evaluated the catalyst performance through electrochemical testing. The experimental results showed that the introduction of Fe clusters improved the half-wave potential of the catalyst to 0.399 V, which represented an 8.2 % enhancement compared to the SAC catalyst and reached 87.1 % of that of the commercial Pt–C catalyst, and reduced the Tafel slope to 61.47 mV dec −1 , effectively improving the ORR activity of the catalyst. We constructed FeN 4 single atom catalyst models and FeN 4 /Fe 4 N 6 single atom cluster catalyst models using density functional theory (DFT), analyzed their electronic structures and reaction mechanisms, and revealed the mechanism of action of iron clusters. DFT calculations showed that iron clusters altered the charge distribution of FeN 4 sites, reducing the rate determining step (RDS) (OH desorption) energy to 0.5 eV, which promoted the desorption of products and the re-adsorption of reactants. As a result, the superior electrocatalytic performance of Fe–N–C SAC/AC is attributed to the synergistic effect between iron clusters and single atoms, which is influenced by the coordination environment and provides new ideas for designing efficient ORR catalysts.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
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2025
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IF 3
Qi Li,Zhangqiao Zhou,Yan Nie,Lu Yang,Yu Wang,Jinsong Chen,Xian Wang
The preparation of soft magnetic composites requires effective surface modification of alloy powder to enhance insulating properties and achieve dense, uniform coating layers. Firstly, the gas-atomized Fe-Ni-Mo powder was surface modified using the atomic layer deposition method, forming a uniform and dense Al 2 O 3 insulating layer. The secondary surface modification of organic polymers further improves the properties of soft magnetic composites. This study systematically evaluates the effects of the primary and secondary surface modification on the properties of powder particles and soft magnetic composites. The primary modification generates an extremely thin insulating layer of approximately 2.5 nm, which increases the particle resistivity by 9 orders of magnitude. The permeability frequency stability of the soft magnetic composites increased from 11.3 % to 96.5 %, resulting in significant core loss reduction. The secondary modification effectively enhances the formability of soft magnetic composites. Optimal permeability of 242.7 at 1 kHz is achieved, maintaining 95.2 % frequency stability up to 1 MHz, while core loss remains below 570 mW cm −3 under 100 kHz/100 mT conditions. The surface treatment method in this work can provide a reference for the surface insulation modification of soft magnetic composites.
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Journal of Materials Chemistry B
·
2025
·
IF 5.7
Jiale Zhang,Pengtao Chen,Jinlong Hu,Shuqing Wu,Yue Lin,Yao Lu,Junyu Xia,Jingcheng Wang,Jie Li,Yuan Liang
Implant-related infections (IRIs) pose a major challenge in orthopedic applications due to the persistence of biofilms, which are highly resistant to conventional antibiotics. This study introduces oxygen vacancy-engineered Zn–Fe spinel nanoparticles as microwave-responsive antibacterial agents. The oxygen vacancies in the spinel structure enhance reactive oxygen species (ROS) generation under microwave irradiation, providing a dual-mode antibacterial mechanism of thermal and oxidative stress. Zn–Fe spinel nanoparticles were synthesized using a sol–gel method and evaluated for their antibacterial efficacy against Staphylococcus aureus biofilms. Under microwave irradiation, the Zn–Fe spinel demonstrated significant biofilm disruption and bacterial eradication. Mechanistic studies revealed that oxygen vacancies promoted ROS generation, leading to bacterial membrane damage. In vivo experiments using a mouse infection model confirmed the material's antibacterial efficacy and biocompatibility, with no observed toxicity. This study highlights the potential of oxygen vacancy-enhanced Zn–Fe spinel as a microwave-assisted, antibiotic-free strategy for treating deep-seated infections associated with orthopedic implants.
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高影响因子
Surfaces
·
2025
·Vol. 8
·期 3
·60
·
IF 2.9
Yanying Zhu,Yanxiang Wang,Jianwei Zhang,Jinghe Guo,Yingfan Li,Siao Xin,Ziyi Xu,Yanru Yuan,Dong Zhang
Surface modification of carbon fibers (CFs) is a critical step in preparing carbon fiber-reinforced composites. This study developed a continuous experimental process that integrates electrochemical anodic oxidation and chemical vapor deposition to fabricate carbon nanotubes/carbon fiber (CNTs/CF) reinforcements. The effects of temperature and hydrogen flow rate during CNT growth on the resulting reinforcements were systematically investigated. The surface morphology and mechanical properties of the modified materials were characterized using scanning electron microscopy, Raman spectroscopy, and single-fiber tensile testing. Employing an Fe0.5Ni0.5bimetallic catalyst under optimized conditions (550 °C, H2flow rate: 0.45 mol/min, C2H2flow rate: 0.30 mol/min), the resulting reinforcement exhibited an 8.7% increase in tensile strength compared to as-received CF.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2025
·Vol. 40
·期 2
·382-388
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IF 1.1
Cao Tian,Li Wei,Ren Lin,Song Tao,Song Jie,Lin Jiacheng,Yang Li,Liu Wenxiu,Wang Ping,Feng Shaojie
The adsorption of phosphate was conducted by the complex of chitosan/polyacrylamide/ferric(CS/PAM/Fe(III)) prepared. The SEM images and XPS spectra confirmed the successful adsorption of phosphate. The adsorption process was studied by varying the influencing aspects like pH, co-existing ions, contact time, and initial phosphate concentration. The experimental results indicate that the adsorptive capacity decreases with the increase of pH. However, it is commendable that there is still a adsorption capacity of more than 5 mg/g when the pH is 8–11. The adsorption kinetics can be accurately described by the pseudo-second-order model and is controlled by both chemisorption and surface diffusion. The adsorption process is a single layer adsorption. This paper proposed that the adsorption mechanism of CS/PAM/Fe(III) complex is the joint action of electrostatic attraction and ligand exchange.
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JOURNAL OF POLYMER SCIENCE
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2025
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IF 3.6
Yang Liu,Guodong Cao,Xuelong Zhu,Yi Zhang,Chenglu Liang,Yukun Chen
Upcycling the wasted polyamide 6 (PA6) to its monomer caprolactam via depolymerization is a promising way to build the resource cycling and alleviate the environmental pollution. High efficient catalyst for PA6 depolymerization is desirable and crucial. Herein, a sulfonated Fe-MOF catalyst was designed and performed as solid acid catalyst for the PA6 depolymerization for the first time. Results showed that a 100% conversion of PA6 solid to water-soluble liquid products can be achieved at temperatures of 250°C after only 1-h reaction. LC/MS results indicated that the water-soluble products were mainly composed of caprolactam and their oligomers. Without catalyst, nearly no water-soluble products can be obtained at the same condition. Moreover, a high selectivity of 90% caprolactam production in the water-soluble liquid products was achieved at 260°C, 5 h. The reaction rate constants at 240°C, 250°C, and 260°C were determined to be 0.024, 0.033, and 0.064, respectively, with a Ea value of 101.8 kJ/mol, showing positive temperature dependent relationship. The comparison of catalytic performances over sulfonated Fe-MOFs, FeCl 3 ·6H 2 O and the pristine un-sulfonated Fe-MOF suggested the synergistic contribution of Fe sites (Lewis acid centers) and the sulfonic acid sites to the catalytic performances. Graphical Water soluble liquid products (100 wt.%) with a high selectivity of 90% caprolactam can be achieved by the addition of Fe-MOF catalyst under a mild condition through the synergistic catalytic contribution of Fe sites (Lewis acid centers) and the sulfonic acid sites.
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