JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 26
·11970-11983
·
IF 3.553
Niu Yingchun,Li Xueai,Dong Wenqi,Zhang Can,Zhao Kuihu,Wang Fengyan,Wang Haiyan
Carbon and iron composites have drawn much attention for their unique electromagnetic properties. In addition, nitrogen doping of carbon can effectively modulate the dielectric properties of carbon. Therefore, synthesis of N-doped carbon and iron composites is an alternative method for obtaining high-efficiency microwave absorption materials. In previous studies, the synthesis process was very complicated including multistep routes. In this work, N-doped carbon with embedded Fe/Fe 3 C was synthesized in-situ via pyrolysis of amino phenol formaldehyde resin (APF) scattered with Fe 2 O 3 nanoparticles (APF/Fe 2 O 3 ), which was obtained through a simple hydrothermal process. During the heat-treatment process, the APF resin was converted into N-doped carbon, and simultaneously, the Fe 2 O 3 was reduced to iron nanoparticles. Then, inevitably, the iron nanoparticles reacted with carbon to form Fe 3 C at the interface between the iron particles and carbon. Taking advantage of multiple heterogenous interface, the interfacial polarization relaxation could be enhanced. Therefore, the N-doped carbon with embedded Fe/Fe 3 C particles displays microwave absorption with a maximum reflection loss of − 70 dB. Moreover, the effective absorption bandwidth (reflection loss of less than − 10 dB) reaches 6.02 GHz at a thickness of 2.13 mm. This study not only provides composites of N-doped carbon with embedded Fe/Fe 3 C particles with excellent stable microwave absorption but also offers a simple method for synthesizing N-doped carbon with embedded Fe/Fe 3 C particles.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROCERAMICS
·
2025
·
IF 2.6
Lin Cheng,He Yuchan,Zhuang Wuyi,Chen Sili,You Zhixian,Zhao Guiying,Huang Zhigao,Li Jiaxin
The development of high-performance silicon/silicon oxide (Si/SiO x ) anodes has attracted great attention in the field of next-generation high-energy lithium-ion batteries (LIBs). However, preparing effective Si/SiO x composite materials to address issues such as poor cycling stability, subpar initial coulombic efficiency (ICE), and subpar interface compatibility remains a challenge. This work proposes a simple strategy for preparing Fe/Fe 3 C particle modified thin-layer carbon-coated Si/SiO x composite materials using a mixture of resorcinol formaldehyde (RF) precursor pyrolysis and ultrasonic treatment (referred to as C@Si/SiO x -Fe/Fe 3 C, abbreviated as CSSO-Fe/Fe 3 C). These composite materials are used as anodes for LIBs. Exploiting the benefits of its structure and composition, the CSSO-Fe/Fe 3 C anode offers a high ICE value of 68.7% and maintains a capacity of 563.2 mAh g −1 even after 1200 cycles at a current density of 2.5 A g −1 . Comprehensive characterization and electrochemical studies have elucidated the interface compatibility and structural stability mechanisms induced by the small amount of Fe/Fe 3 C doping and carbon coating, which explain the high capacity and stable cycling performance. Furthermore, when paired with LiCoO 2 cathode, the assembled LiCoO 2 ||CSSO-Fe/Fe 3 C coin-type full battery has a capacity of 80.7 mAh g −1 and a capacity retention rate of 76.6% after 200 cycles at 1.0 C. This synthesis approach offers valuable insights for designing high-performance Si/SiO x electrode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3663-3669
·
IF 2.817
Xiang Tong,Chen Zhi,Rao Zhixin,Yan Mingge,Feng Zhijun,Li Xibao,Yang Huiyong,Huang Juntong,Shen Xing
Iron carbide (Fe 3 C) has gained significant attention for use in energy storage applications. Furthermore, using a nano-scale metal as the catalyst can reduce the formation of a solid electrolyte interface (SEI), thus enhancing capacity. For these reasons, hierarchical Fe/Fe 3 C/C nanofibers are prepared by electrospinning with subsequent thermal treatment and used as the anodes for lithium ion batteries (LIBs). These anodes demonstrate a good rate and high capacities. At 0.1 A g −1 , the Fe/Fe 3 C/C nanofiber electrode maintains 518 mA h g −1 after 100 cycles. When tested at 1 A g −1 , the discharge capacity gradually increases and reaches 663 mA h g −1 after 1200 cycles. This work demonstrates the possibility to design and develop transition metal carbides (TMCs) for use in energy storage.
研究领域:
材料科学
·
储能技术
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纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2021
·Vol. 2022
·期 6
·e202100996
·
IF 2.524
Fagong Xu,Feiyang Zhan,Beibei Zhang,Tuanhui Li,Lei He,Liting Du,Shizhou Luo,Baishu Zheng,Ruirui Yun
Graphical A tubular core-shell catalyst of Fe/Fe 3 C-900 has been designed and synthesized which shows an excellent activity, chemo-selectivity and stability for the hydrogenation of nitroarenes under mild conditions. Recent years, tubular structure as the carrier loading nanoparticles has been reported more and more frequently which is synthesized by pyrolysis polyhedral MOFs. However, the construct mechanism has not been referred. Herein, a tubular structure has been designed by calcining modified ZIF-8 under different temperature to reveal the formation process of tubular carbon from the polyhedron. As a result, a pod-like core-shell catalyst of Fe/Fe 3 C-900 has been obtained and exhibits a high activity and excellent substituent tolerance for the reduction of nitro groups under mild conditions.
研究领域:
催化
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Hao Zheng,Cong Guo,Lin Lin,Hongwei Wang,Jiayue Zhang,Zeyi Jiang,Zhuojian Liang,Zhenghao Chen,Nien-Chu Lai
Efficient and durable bifunctional oxygen electrocatalysts represent a cornerstone for high-energy-density rechargeable metal-air batteries. Herein, we report a facile one-step pyrolysis synthesis of nitrogen-doped graphite carbon-encapsulated Fe/Fe 3 C heterojunction nanoparticles (Fe/Fe 3 C@NC) with a well-defined core-shell architecture. The Fe/Fe 3 C heterojunction exhibits prominent interfacial electron transfer from Fe to Fe 3 C. This electron-rich Fe 3 C phase enables superior adsorption modulation toward oxygen intermediates, thereby endowing the catalyst with exceptional bifunctional oxygen electrocatalytic activity. In alkaline media, Fe/Fe 3 C@NC outperforms platinum-group metal (PGM) benchmarks in both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), achieving a smaller OER/ORR overpotential difference than Pt/C + RuO 2 . When integrated into aqueous and flexible zinc-air batteries, Fe/Fe 3 C@NC maintains an impressive 92.6% of its initial round-trip efficiency (RTE) over 1900 h (5700+ cycles), far exceeding the PGM-based control (23.3% RTE decay within 50 h, 150 cycles). Structural characterizations confirm that Fe/Fe 3 C@NC retains its morphology and crystallinity after prolonged cycling, highlighting the critical role of the core-shell architecture in preserving structural/compositional integrity. This work not only elucidates the pivotal role of the Fe/Fe 3 C heterojunctions in enhancing bifunctional oxygen electrocatalysis but also provides a scalable carbon-encapsulation strategy for designing low-cost, high-performance, and long-lifespan non-noble metal bifunctional catalysts for next-generation metal-air batteries.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Haoyang Wu,Zhilong Tan,Bin Miao,Hailong Hu,Sanying Hou
In this work, Fe, N co-doped hierarchical porous graphite-like carbon with carbon-encapsulated Fe/Fe 3 C@ Fe-N-C was synthesized by a facile solid-phase synthesis strategy, and was employed as an efficient catalyst to activate peroxymonosulfate (PMS) for oxidation of tetracycline (TC). The optimal Fe-N/C 800 outlined a highly catalytic performance in activating peroxymonosulfate (PMS) with TC decomposition rate reaching 89.2 % in 20 min at ultra-low catalyst dosage. Meanwhile, the effect of operating parameters was also investigated in order to evaluate the potential of using Fe-N/C 800 in practical applications. In addition, the characterization analysis and experiments results elucidated that graphitic N, pyridinic N, C O, Fe 3 C, Fe 0 and FeN 4 were considered as the main reactive species promoting the PMS activation to generate reactive oxygen species (ROS) (including singlet oxygen ( 1 O 2 ), sulfate radical (SO 4 •- ) and hydroxyl radical (•OH)). The electron paramagnetic resonance (EPR) experiments and radicals quenching analyses further demonstrated that the non-radical species singlet oxygen ( 1 O 2 ) was the dominant reactive oxygen species. Moreover, the TC degradation pathways were presented by LC-MS. Ultimately, the toxicity of the intermediate products were also investigated by ECOSAR system.
研究领域:
环境科学
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材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Pengfei Wan,Siyang Dong,Jing Xiong,Xuanyang Jin,Shengjun Lu,Yufei Zhang,Haosen Fan
Lithium sulfur batteries (LSBs) have been considered as one of the most promising options for next generation high-performance batteries. However, the heavy shuttle effect and inferior redox conversion during the charge/discharge processes of the batteries have greatly hindered their further applications. In this study, to address these disadvantages of LSBs, Fe/Fe 3 C/FeN 0.0324 heterostructured nanocubes were designed and prepared through high temperature carbonization process using Prussian blue precursor. Then the Fe/Fe 3 C/FeN 0.0324 nanocubes were used to modify the commercial polypropylene (PP) separator, which can greatly catalyze the redox transformation of polysulfides and provide sufficient active sites for chemisorption . As result, the modified separator endowed LSBs with excellent rate capacity and cycle stability, delivering a high-capacity of 1025 mAh/g at 0.5 C with nearly 100% coulombic efficiency. It also displayed a superb cycling performance with a per-cycle capacity attenuation rate of 0.09% after 300 cycles. When the current density increased to 1 C with the S loading of 1.73 mg cm −2 , Fe/Fe 3 C/FeN 0.0324 -PP separator presented a satisfactory capacity decay rate of 0.05% per cycle after 1000 cycles. Besides, it also presented outstanding electrochemical performance even at high sulfur loading of 4.5 mg cm −2 . This work has provided a new avenue for the design of nanomaterials with synergistic effect of catalytic conversion and chemisorption of polysulfides for the promotion of high-performance Li-S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Wen Wen Xie,Tong Zhen Tian,Min Yang,Nian Wu Li,Le Yu
Rational design of effective bifunctional inexpensive oxygen electrocatalyst is highly important for Zn-air batteries (ZABs), which can accelerate both oxygen reduction/evolution reactions at the oxygen electrode. Herein, we present the formation of hierarchical hollow frameworks of dual-sided Fe/Fe 3 C@N-doped carbon nanotubes (FNCHFs) through a template-engaged method. Benefitting from the synergistic effect between the robust hollow frameworks and in-situ grown dual-sided N-doped carbon nanotubes, the FNCHF electrocatalyst presents enhanced mass/electron transport with high structural stability. As a result, the FNCHFs based bifunctional oxygen electrode demonstrates a desirable oxygen electrocatalytic activity and stability with a half-wave potential of 0.863 V for oxygen reduction and an overpotential of 340 mV to reach the current density of 10 mA cm −2 for oxygen evolution. The corresponding ZAB exhibits a high peak power density of 206 mW cm −2 , a high specific capacity of 781 mAh g Zn −1 , and a good cycling stability more than 300 h.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Binbin Feng,Qionghao Xu,Xiaoxue Wu,Chunlin Ye,Yanghe Fu,De-Li Chen,Fumin Zhang,Weidong Zhu
Owing to the competitive hydrogenation of reducible functionalized groups and the complexity of the reaction mechanism, the selective catalytic hydrogenation of nitroarene compounds to value-added amine products is challenging. Herein, we designed and prepared a series of highly efficient iron-based nanocomposites (Fe/Fe 3 C@NC–T) via direct pyrolysis of the presynthesized NH 2 –MIL–101(Fe) octahedrons under nitrogen atmosphere, wherein tiny metallic Fe/Fe 3 C nanoparticles (NPs) were homogeneously inlaid in the N-doped porous carbon matrix. Among the various derived catalysts, Fe/Fe 3 C@NC–750 exhibited the best performance, with good tolerance to several different functional groups for the catalytic transfer hydrogenation of nitroarenes to anilines using N 2 H 4 ·H 2 O as the reductant under mild conditions. This performance was also superior to those of commercial catalysts (Fe, Fe 2 O 3 , and Fe 3 C) and Fe/Fe 3 C@C–750 without N doping. The synergistic catalysis between the Fe-based NP and N dopant mainly contributed to the excellent catalytic performance of Fe/Fe 3 C@NC–750. Moreover, the mechanism study revealed that both the direct route and the condensation route were involved in this catalytic reaction system.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2021
·
IF 5.268
Bao Jiang,Liping Wang,Gang Wu,Lin Zhou,Shaohua Wei
The chemodynamic therapy (CDT) effect is restricted by the neutral pH environment in the tumor, also, the protein corona formed on the surface of the CDT catalyst reduces its activity. Here, we synthesized a core-shell CDT drug consisting of Fe/Fe 3 C core and mesoporous graphite carbon shell with biotin modification (denoted FeCNB). The shell and core form a galvanic cells in the physiological electrolyte solution to achieve high-efficiency CDT under physiological pH conditions. The mesoporous in the shell effectively separates the protein corona from the Fe/Fe 3 C, avoiding the influence of the protein corona on the catalyst. However, the mesoporous is permeable for the substrate and product of the catalytic reaction . FeCNB also has T2-magnetic resonance imaging (MRI) function and photothermal conversion ability under 808 nm laser irradiation. The tumor heating further improves the CDT effect to achieve a satisfactory synergistic photothermal therapy (PTT)/CDT outcome. In addition, FeCNB degrades in the microenvironment to ensure its excellent biocompatibility. It is the first study of CDT drug design and fabrication based on the mechanism of the galvanic cells.
研究领域:
癌症治疗
·
材料科学
·
生物医学工程
·
纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Fengxian Zhang,Ye Chen,Yang Liu,Xupo Liu,Shuyan Gao
Constructing highly efficient and durable non-noble metal modified carbon catalysts for oxygen reduction reaction (ORR) in the whole pH range is essential for energy conversion devices but still remains a challenge. Herein, the Fe/Fe 3 C nanoparticles and Fe-N X species anchored on the interconnected mesoporous carbon materials are fabricated through an economical and facile template-assisted polymerization-pyrolysis strategy. The catalyst exhibits unique features with the electronic interaction between Fe/Fe 3 C and Fe−N X , large specific surface area and high mesoporous structure as well as nitrogen doping in porous carbon skeletons, which can effectively catalyze ORR over the full pH range. In an alkaline electrolyte , the optimized catalyst displays favorable ORR performance with positive onset potential ( E onset = 0.91 V), half-wave potential ( E 1/2 = 0.83 V), long-term cycles stability and methanol tolerance, exceeding those for the commercial Pt/C. Furthermore, the prepared catalyst could be directly assembled into the alkaline Zn−air battery that exhibits the open-circuit voltage of 1.44 V, high power density of 96.0 mW cm −2 and long-term durability. Therefore, the template-assisted polymerization-pyrolysis strategy provides a promising route for designing high-performance non-noble metal decorated ORR electrocatalysts .
研究领域:
材料科学
·
电化学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）