Processes
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2026
·Vol. 14
·期 13
·2150
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IF 3.4
Pei Liu,Ao-Tian Gu,Jian Chen,Jun Chen,Zi-Rui Tian,Lei-Lei Gu,Yi Yang
With the rapid development of the pharmaceutical industry and animal husbandry, conventional wastewater treatment plants have difficulty effectively degrading the widely occurring ceftiofur sodium (CEF) in aquatic environments. To address this issue, this study successfully loaded Fe/Co-ZIF onto carbon nanofibers (CNF), thereby preparing Fe/Co-ZIF@CNF composites with well-dispersed supported materials and a stable structure. The as-prepared Fe/Co-ZIF@CNF was further applied in a persulfate-based advanced oxidation system (SR-AOPs) for CEF degradation and exhibited good catalytic performance. When the Fe/Co molar ratio was 1.25:1, the Fe/Co-ZIF1.25material achieved a CEF degradation efficiency, kobsvalue, and TOC removal rate of 94.0%, 0.135 min−1, and 43.8%, respectively. Radical quenching experiments preliminarily indicated that SO4•−played a dominant role in the reaction system, while •OH and1O2also made non-negligible contributions to CEF degradation. This work provides a new strategy for constructing composite catalysts based on carbon nanofiber-supported polymetallic MOFs.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2026
·
IF 6.9
Yuhao Wang,Zhenye Zhu,Guanglei Li,Shengmin Chen,Yapeng Yue,Gefeng Li,Zhenghong Yan,Liang Zhou,Rongshu Zhu,Jiaheng Zhang
Background Lithium-sulfur (Li-S) batteries are promising next-generation energy storage systems due to their high theoretical energy density. However, their practical deployment is hindered by the polysulfide shuttling effect and sluggish redox kinetics. Methods We demonstrate an ionic liquid (BMIM-BF4)-assisted strategy to synthesize hollow carbon nanospheres anchored with Fe-Co diatomic catalysts (NFB-FeCoNC/HSs). Significant findings Systematic characterization reveals that the dual-metal sites synergistically enhance bidirectional sulfur redox reactions, while the ionic liquid-derived heteroatoms (N, F, B) optimize catalyst porosity and metal loading density. Electrochemical evaluations show the sulfur cathode achieves remarkable cycling stability with 59.28% capacity retention after 200 cycles at 0.2 C. Notably, under high sulfur loading (8.89 mg cm⁻²) and lean electrolyte conditions (E/ S = 5.3 μL mg⁻¹), the battery delivers an exceptional areal capacity of 8.87 mAh cm⁻². Long-term cycling at 1 C exhibits a high initial discharge capacity of 1001.12 mAh g⁻¹ with 415.4 mAh g⁻¹ retained after 1000 cycles, corresponding to a minimal decay rate of 0.58% per cycle. This work establishes a paradigm for designing hierarchical diatomic catalysts to address critical challenges in Li-S systems.
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Coatings
·
2026
·Vol. 16
·期 6
·659
·
IF 3.4
Yi Zheng,Xin Luo,Sizhe Li,Zhengxian Shen,Hui Su
Faced with a global energy crisis and ecological degradation, overall water splitting (OWS) is a pivotal approach for renewable energy conversion and storage. However, its industrial application is hindered by the high energy barriers/sluggish kinetics of the anodic oxygen evolution reaction (OER), as well as the scarcity of precious metal catalysts limiting large-scale deployment. Herein, a cobalt-based layered double hydroxide (Co-LDH) was used as the precursor, and a multi-strategy synergistic modification (hydrothermal synthesis, Fe doping, sulfurization, and external magnetic field magnetization) was applied to fabricate the Fe-Co3S4-MS-20 min electrocatalyst. This strategy establishes Fe-Co bimetallic synergistic active centers, and magnetic treatment modulates the electron configuration of Fe 3dorbitals without changing the material’s lattice spacing or morphology. Structural characterizations and electrochemical measurements were used to investigate the effects of combined modifications on the catalyst’s phase structure, morphology, electronic structure, and trifunctional catalytic performance toward the hydrogen evolution reaction (HER), OER, and urea oxidation reaction (UOR). The Fe-Co3S4-MS-20 min catalyst exhibits a larger electrochemical active surface area, lower charge transfer resistance, and smaller Tafel slope in 1 M KOH, it achieves overpotentials of 165 mV for HER (10 mA·cm−2) and 310 mV for OER (100 mA·cm−2), along with superior UOR performance and long-term stability. In situ impedance and Raman spectroscopy confirm that magnetization accelerates charge transfer and promotes in situ reconstruction. Synergistic multi-strategy regulation optimizes the electronic structure of active centers, reducing electrocatalytic energy barriers. This work provides new insights into designing high-performance non-precious metal electrocatalysts and offers experimental support for external magnetic field regulation in electrocatalyst modification.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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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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Sustainable Materials and Technologies
·
2023
·
IF 9.6
Chao Wang,Jingyi Zhang,Li Wang,Jianmin Feng,Liqun Wang,Lei Dong,Conglai Long,Dejun Li,Feng Hou,Ji Liang
The crucial step for splitting water is the oxygen evolution reaction . The key to promote this reaction lies in the catalyst. Molybdenum disulfide , as a two-dimensional material with molybdenum and sulfur atoms stacked, is especially suitable as a doping platform to develop high-performance OER catalysts. Fe/Co/Ni ternary transition metal combination has always been a highly active catalytic site for OER. Heteroelement of Fe/Co/Ni doping is expected to effectively modify the local electronic configuration of matrix materials and thus enhances their electrocatalytic OER capability. With this in mind, we report a simple in-situ hydrothermal doping of MoS x nanowires on iron‑nickel alloy foam with ternary transition metal of Fe/Co/Ni. This ternary transition metal of Fe/Co/Ni doped f self-supported electrode (denoted Fe/Co/Ni-MoS x /INF) displays outstanding OER performance in terms of small overpotentials of 214 and 263 mV at current densities of 10 and 100 mA/cm 2 , respectively, in alkaline solution. It was far better than the commercial Ir/C catalysts (253 and 434 mV@10 and 100 mA/cm 2 ). The Tafel slope is about 48.1 mV/dec. Moreover, Fe/Co/Ni-MoS x /INF also has an excellent catalytic stability without any obvious performance decay after 20 h operation. This work contributes to the investigation of high-efficiency OER catalysts based on transition metal-doped MoS x and offers a substitute for noble metal catalysts.
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ELECTROANALYSIS
·
2023
·Vol. 35
·期 5
·e202200521
·
IF 3
Luyi Chen,Ping Xiao,Bin Hu,Yiwen Wang,Jianmao Yang,Jianyun Liu
3-dimensional (3D) Fe−Co−LDH/MXene composite was synthesized by in-situ synthesis and assembly of Fe−Co−LDH rod around MXene under hydrothermal condition. Due to the unique 3D configuration and good conductivity, the obtained Fe−Co−LDH/MXene modified glassy carbon electrode (Fe−Co−LDH/MXene/GCE) showed excellent electrochemical activity for As(III) detection. Via square-wave anodic stripping voltammetry, the response current on Fe−Co−LDH/MXene/GCE had good linear relationship with As(III) concentrations (1∼1000 ppt) with superior sensitivity (0.22 μA ppt −1 cm −2 ) and low detection limit (0.9 ppt). The mechanism of As(III) adsorption was demonstrated. The electrode showed excellent anti-interference ability. Real water sample analysis demonstrated the Fe−Co−LDH/MXene/GCE was deployable in aqua-system.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Yin Wang,Qikui Man,Shiqi Zhu,Zhenkuang Lei,Guoguo Tan,Hongtao Guan
It’s a hurry to introduce a lightweight and high-efficiency microwave absorption material that is easy to synthesize, since the electromagnetic interference pollution is getting increasingly serious. Carbon-based microwave absorption material based on bimetallic metal-organic frameworks (MOFs) gets high conductivity and good magnetism at the same time, and thus can be regarded as an efficient microwave absorber with lightweight. Herein, we introduce an easy method to compose bimetallic carbon-based microwave absorbers based on ZIF-67. By changing the proportion of Fe 3+ and Co 2+ , not only the magnetism of the material can be adjusted, the amount of carbon nanotubes (CNTs) and so as the dielectric property of the material can also be regulated. The method of introducing precursors at room temperature and then calcinating at an Ar atmosphere is simple to repeat and appropriate for mass production. When the dosage molar ratio of Co 2+ : Fe 3+ is 3: 2, the minimum reflection loss ( RL min ) can reach − 24.83 dB while the effective absorption bandwidth (EAB) can reach 5.14 GHz when the thickness is 1.7 mm, under a 30 wt% filling loading. We believe that this work can provide a reliable method to introduce carbon-based microwave absorption material based on bimetallic MOF materials.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
·
IF 8.91
Tong Zhu,Jinping Jiang,Jisheng Wang,Zhening Zhang,Jiao Zhang,Jing Chang
A magnetic FeCo 2 O 4 /Co 3 O 4 nanocomposite was successfully synthesized by a facile hydrothermal method as an efficient activator for persulfate (PS) activation to degrade tetracycline (TC) in an aqueous solution. TC removal and mineralization efficiencies reached up to 91.63% and 43.57% in 120 min in the FCC-3/PS system, respectively. The mixed-valence of Fe/Co in the nanocomposite catalyst was beneficial for electrons transfer between Co and Fe elements and enhanced the redox circulation of Fe and Co in between divalent and trivalent. Surficial analysis and phosphate adsorption test confirmed the existence of –OH groups on the surfaces of FeCo 2 O 4 /Co 3 O 4 nanocomposite. Fe/Co redox and surficial hydroxyl in the catalyst played significant roles in the TC potentiation degradation, which was contributed by the plenty of adsorbed –OH groups and excellent dispersity of FeCo 2 O 4 in the FeCo 2 O 4 /Co 3 O 4 composite. The sulfate radicals were major species followed by the hydroxyl radicals , and the surficial adsorbed hydroxyl made great contributions to radical generation. The cycling test and intermediate toxicity analysis indicated that the nanocomposite was considered stable and practicable in water treatment . This work demonstrated that the FeCo 2 O 4 /Co 3 O 4 nanocomposite was an effective and environ-friendly catalyst towards PS activation for removing organic pollutants from water.
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PubMed
高影响因子
Journal of Chemistry
·
2023
·
IF 3
Hao Fu,Aotian Gu,Peng Wang,Chunhui Gong,Zhiying Li,Kai Chen,Yi Yang
The exploration of transforming various metals as metal sources into metal organic frameworks (MOFs) has attracted considerable attention in recent years. This study used triethylamine and 5,6-dimethylbenzimidazole (DMBIM) to modify the iron-doped cobalt zeolite imidazole framework on carbon fiber structure. The results showed that the ZIF(Fe/Co)1.25@CNF exhibited high CEF removal efficiency that over 97% of ceftiofur sodium (CEF) was removed within 10 min, which was significantly higher than that of the common ZIF-67 materials. Compared with other ZIF-67 composites, ZIF(Fe/Co)x@CNF has a larger specific surface area, resulting in a larger contact area and more active sites during the reaction. After the introduction of DMBIM, the ZIF(Fe/Co)1.25@CNF not only easily separated from the solution but also enhanced the hydrophobicity, which provided higher catalytic stability and catalytic performance. In addition, the effects of different catalyst ratios, pollutant concentrations, solution pH, and different radicals (•OH, SO4•−, 1O2) on the activation of peroxymonosulfate (PMS) were investigated. The mechanism of degradation was elucidated by electron paramagnetic resonance experiments. This study provides a new perspective for the preparation of high-performance MOF catalysts with excellent catalytic performance and may facilitate the application of MOF materials in more practical situations.
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ChemCatChem
·
2020
·Vol. 13
·期 3
·1023-1033
·
IF 4.853
Yugang Qi,Shan Yuan,Lili Cui,Zizhun Wang,Xingquan He,Wei Zhang,Tewodros Asefa
Graphical Peak Power ! Novel hybrid materials composed of N-doped carbon nanotubes (CNTs) with several embedded Fe−Co alloy nanoparticles (CNTs@(Fe,Co)PP) that can serve as highly efficient bifunctional oxygen electrocatalysts are derived from bimetallic Fe/Co-coordinated polyporphyrin-CNTs self-assemblies via pyrolysis. The optimal electrocatalyst is used at air electrode in zinc-air battery (ZAB) delivering a higher peak power density and showing a better long-term cycling stability than a ZAB containing the noble metal electrocatalysts Pt/C+RuO 2 . The design and fabrication of efficient, less costly, and stable bifunctional oxygen electrode electrocatalysts is crucial for large-scale production of rechargeable zinc-air batteries. Herein, electrocatalytically active, hybrid materials composed of Fe−Co alloy nanoparticles-embedded N-doped carbon nanotubes (CNTs) are synthesized from Fe/Co-polyporphyrin-CNTs via pyrolysis. The materials serve as highly effective bifunctional oxygen electrode catalysts for zinc-air batteries. In particular, the one synthesized at 700 °C, named CNTs@(Fe,Co)PP-700, shows a very good activity for both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) in an alkaline solution. This material catalyzes ORR with a limiting current density of 5.11 mA cm −2 and a half-wave potential of 0.86 V vs RHE. It also catalyzes OER with 10 mA cm −2 at a small overpotential of 360 mV. Besides, it operates well as an air cathode in a home-made rechargeable zinc-air battery, with a small voltage gap of 0.71 V at 2 mA cm −2 , while remaining stable in hundreds of charge-discharge cycles for >83 h. Its performance in a zinc-air battery is better than that of a benchmark air-electrode containing noble metals, Pt/C+RuO 2 .
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SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Qian Wu,Peijin Wang,Xue Yang,Min Wei,Mao Zhou,Yuxin Pu,Mingxiao Zhang
An ultrasensitive electrochemiluminescence (ECL) biosensor was constructed by using Fe y Co 3-y [Co(CN) 6 ] 2 prussian blue analogues (Fe-Co-Co PBAs) as a novel electrochemically regenerable co-reaction accelerator for methotrexate (MTX) detection. In this work, we synthesized the core-shell Fe-Co-Co [email protected] 3 N 4 tags with luminophores and co-reaction accelerators via a facile and green method. To the best of our knowledge, it is the first time that Fe-Co-Co PBAs was used as an efficient co-reaction accelerator of the carboxylated graphene-like carbon nitride /peroxydisulfate (C-g-C 3 N 4 /S 2 O 8 2− ) ECL system for signal amplification. In view of the prominent quenching effect of MTX on the ECL response of the C-g-C 3 N 4 , the proposed ECL biosensor exhibited high sensitivity to quantify the concentration of MTX from 5 pM to 10 μM with a detection limit of 1.1 pM. Simultaneously, the biosensor has also been successfully applied to MTX detection in human serum and urine samples with reasonable recoveries. Hence, the proposed method holds a new perspective of PBAs nanomaterials in biosensing and provides a potential analysis method for the rapid detection of MTX in biological systems.
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CLAYS AND CLAY MINERALS
·
2019
·Vol. 67
·期 4
·325-333
·
IF 1.835
Guo Yu-Hua,Pan Guo-Xiang,Xu Min-Hong,Wu Tao,Wang Yong-Ya
Adsorption desulfurization is a potential new method for deep desulfurization of fuel oil. The development of adsorbents with high adsorption capacity and selectivity is the core of deep adsorption desulfurization. The adsorption behavior of thiophene in MCM-41 mesoporous materials modified by various metal ions was studied in order to understand the adsorption desulfurization process of molecular sieves. The Fe-, Co-, and Zn-modified MCM-41 materials were prepared using a one-step in situ hydrothermal synthesis method. The modified MCM-41 molecular sieves maintained the mesoporous structure, and the metal ions had specific dispersion on the surface of the molecular sieves. Adsorption of thiophene on the surfaces of molecular sieves had both physical and chemical characteristics. The adsorption desulfurization performance of the modified molecular sieve was superior to that of the pure silica molecular sieve. In the simulated gasoline with sulfur content of 220 μg/g, when the amount of adsorbent used was 100 mg, the adsorptive desulfurization performance tended to be in equilibrium, and the optimum adsorption temperature was 30°C. Fe-MCM-41 and MCM-41 molecular sieves reached adsorption equilibrium after ~60 min, but the desulfurization rate of Co-MCM-41 and Zn-MCM-41 still increased slightly. The kinetic simulation results indicated that the pseudo-second-order kinetics adsorption model described well the adsorption process of thiophene on molecular sieves. The molecular sieve Fe-MCM-41 had the best desulfurization performance with an equilibrium adsorption capacity of 14.02 mg/g and the desulfurization rate was ~90%.
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