JOURNAL OF ELECTRONIC MATERIALS
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2021
·Vol. 50
·期 6
·3078-3083
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IF 1.938
Wu Wanyi,Wang Mengkun,Huang Huihui,Gu Wenxian,Yan Chengzhan,Chen Guang,Yin Dewu,Jin Huile,Wang Jichang,Wang Shun
In this work, hierarchically porous carbon spheres co-doped by iron and nitrogen were synthesized via in situ dehalogenation. The rich porous structure and relatively high specific surface area (210 m 2 /g) facilitate the formation of an ultra-fine Fe 2 N active phase and FeN 4 active centers within the carbon matrix. Transmission electron microscopy and X-ray photoelectron spectroscopy analysis further reveal the presence of a dominant Fe 2 N phase and minor FeN 4 bonds in the as-prepared Fe-N-C-pd-800 samples. Because of this, the oxygen reduction reaction (ORR) process can more readily take place on Fe 2 N than on FeN 4 , and the Fe 2 N phase enriched Fe-N-C-pd-800 carbon spheres exhibit a promising onset potential ( E onset =1.02 V) and half-wave potential ( E 1/2 =0.86 V) in alkaline media. In addition, Fe-N-C-pd-800 also shows excellent methanol resistance and long-cycling stability.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Xiaoqing Cui,Xiaohui Liang,Jiabin Chen,Weihua Gu,Guangbin Ji,Youwei Du
Here, we report a unique core-shell nanocomposite of Fe 2 N@N-doped carbon that coats dopamine-derived carbon shells on porous Fe 2 N nanoparticles via a facile and effective soft chemical method . The feasibility of preparing core-shell structure in the process of polymerization is realized by utilizing the fact that affluent amino and hydroxyl groups in dopamine endow the formidable chelation ability with metal ions. Temperature-dependent volume shrinkage effect of Fe 2 N originates from the lattice transformation in nitridation process, which is the key factor to control the void space inside carbon nanocubes and optimize the electromagnetic performance. Consequently, the as-prepared samples achieve excellent reflection loss (RL) values and effective absorption bandwidth at an even thin thickness of 1.4 mm. The balance between the temperature-dependent conduction loss and the optimization of hole structure impedance matching may be responsible for the excellent microwave behaviors. This work offers an attractive core-shell Fe 2 N@carbon with controllable void space as a promising candidate to handle the electromagnetic interface (EMI) issues.
研究领域:
材料科学
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纳米技术
·
电磁学
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DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 11
·2508-2517
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IF 5.6
Zhang Yahong,Zhang Yi,Liu Huimin,Li Dan,Wang Yibo,Xu Chunchao,Tian Yuping,Meng Hongjie
Facing the complex variable high-temperature environment, electromagnetic wave (EMW) absorbing materials maintaining high stability and satisfying absorbing properties is essential. This study focused on the synthesis and EMW absorbing performance evaluation of TiN/Fe 2 N/C composite materials, which were prepared using electrostatic spinning followed by a high-temperature nitridation process. The TiN/Fe 2 N/C fibers constructed a well-developed conductive network that generates considerable conduction loss. The heterogeneous interfaces between different components generated a significant level of interfacial polarization. Thanks to the synergistic effect of stable dielectric loss and optimized impedance matching, the TiN/Fe 2 N/C composite materials demonstrated excellent and stable absorption performance across a wide temperature range (293–453 K). Moreover, TiN/Fe 2 N/C-15 achieved a minimum reflection loss (RL) of −48.01 dB and an effective absorption bandwidth (EAB) of 3.64 GHz at 2.1 mm and 373 K. This work provides new insights into the development of high-efficiency and stabile EMW absorbing materials under complex variable high-temperature conditions.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Xuedong He,Yujian Zhang,Juan Wang,Jun Li,Lianghao Yu,Feng Zhou,Juan Li,Xiaojun Shen,Xin Wang,Shun Wang,Huile Jin
Metal compounds encapsulated in carbon materials exhibit promising properties as potential oxygen electrocatalysts. Herein, we first report Fe2N@C derived from the biomass bioaccumulation doping method, which offers a new perspective for exploring oxygen reduction reaction (ORR) electrocatalysts with low cost and high performance. The Fe2N@NCNTs prepared with our biodoping method display excellent ORR activity with a low half-wave potential (E1/2) and long-term stability in a broad pH range. More importantly, a zinc–air battery (ZAB) constructed with Fe2N@NCNTs’ catalysts exhibits a high open-circuit voltage (1.53 V), high peak power density (135 mW cm–2), and excellent stability (over 200 h). The significantly improved ORR performance can be attributed to the high N-doping level and its hierarchically porous structure. This work offers a path for the development of ORR catalysts for environmental governance and efficient energy conversion.
研究领域:
材料科学
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能源科学
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环境科学
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DOI
高影响因子
Small
·
2016
·Vol. 12
·期 10
·1295-1301
·
IF 8.315
Long Liu,Xianfeng Yang,Na Ma,Haitao Liu,Yanzhi Xia,Chengmeng Chen,Dongjiang Yang,Xiangdong Yao
Graphical A simple and scalable synthesis of a 3D Fe 2 N-based nanoaerogel is reported with superior oxygen reduction reaction activity from waste seaweed biomass, addressed the growing energy scarcity. The merits are due to the synergistic effect of the 3D porous hybrid aerogel support with excellent electrical conductivity, convenient mass transport and O 2 adsorption, and core/shell structured Fe 2 N/N-doped amorphous carbon nanoparticles.
研究领域:
能源材料科学
·
环境科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Zhukun Zhang,Dongxian Li,Jia Wang,Jianchun Jiang
Thermochemical conversion is one of the most effective ways to upcycle organic solid wastes into fuels and/or value-added chemicals. In this study, the tandem hydropyrolysis/hydrocracking of polystyrene (PS) to produce ethylbenzene was studied using metal nitrides as catalysts. Fe, N co-doped carbon-based catalyst (Fe 2 N @ C) with core-shell structure was synthesized. The experimental results showed that carbon doping significantly improved the catalytic performance of iron nitride. The yield of ethylbenzene obtained from Fe 2 N @ C catalysis was 81 wt%, which is much higher than that of Fe 2 N (63.3 wt%) and commercial iron nitride (FeN, 4.9 wt%) under the hydropyrolysis temperature of 480 ℃, hydrocracking temperature of 280 ℃, and low H 2 pressure of 0.2 MPa. The high catalytic activity of Fe 2 N @ C is ascribed to the synergy of metal-based selective hydrogenation and acid site-mediated C-C bond activation. This work provides a flexible and efficient catalytic technology for the high-value utilization of polystyrene waste.
研究领域:
化学工程
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材料科学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Guangyu Lei,Jiawen Wu,Lihong Qin,Shun Wu,Fengbao Zhang,Xiaobin Fan,Wenchao Peng,Yang Li
The development of efficient, durable and inexpensive materials as alternatives to precious-metal-based catalyst towards oxygen reduction reaction (ORR) is extremely desirable but challenging. Herein, a facile hydrogel-bridged pyrolysis strategy was presented to construct N-doped graphene embedded with Fe 2 N nanoparticles (NPs) as an efficient ORR catalyst. By virtue of the synergistic contribution of enhanced mass transfer derived from graphene hydrogel network and intrinsic catalytic activity of well-dispersed Fe 2 N NPs, the as-prepared Fe 2 N/NC-1 exhibits exceptional activity and durability for ORR with an onset potential of 1.06 V and a half-wave potential of 0.90 V vs RHE in 0.1 M KOH, which outperforms the state-of-the-art Pt/C catalyst. Moreover, the carbon-shell structure around the Fe 2 N NPs can be clearly identified, which could benefit the long-term durability, and significantly preserve the catalytic activity and selectivity in acidic media. This work provides an effective method and insightful exploration for the design of non-precious-metal carbon-based electrocatalysts and their application in efficient energy conversion.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Materials Advances
·
2020
·Vol. 1
·期 5
·1161-1167
·
IF 0
Zhixing Cheng,Ali Saad,Samira Adimi,Haichuan Guo,Siqi Liu,Tiju Thomas,Minghui Yang
Transition metal nitrides are promising substitutes for noble metal catalysts in photocatalytic hydrogen evolution reaction. Here, we use the cubic metal organic framework (MOF) Prussian blue, which has been rarely explored for nitride preparation. A rapid nitridation process is used for obtaining porous iron nitride (Fe2N) nanoparticles. The phase-pure Fe2N catalyst reported largely maintains the cubic geometry and specific surface area of the parent MOF. Fe2N is sensitized using Eosin-Y for boosting photocatalytic hydrogen evolution. Hydrogen production rates close to ∼14.5 mmol g−1 h−1 are observed, which are considered desirable. This is reasonable since the nitride phase has high electronic conductivity and low electrocatalytic H2-generation overpotential. Calculations indicate that the electronic conductivity of Fe2N is due to Fe-3d states. This work opens up new possibilities for the production of porous nitride photocatalysts for efficient hydrogen evolution.
研究领域:
材料科学
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催化
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化学工程
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可再生能源
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产品关联
DOI
NEW CARBON MATERIALS
·
2025
·
IF 6.8
Xiu-zhen LV,Xiang-xiang XU,Meng-meng YU,Yi-chen WEI,Jun-ying WANG,Jun-zhong WANG
The need for bi-functional catalysts that facilitate both the oxygen reduction (ORR) and carbon dioxide reduction (CO 2 RR) reactions arises from their potential to help solve the critical problems of carbon neutrality and renewable energy conversion. However, there are few reports on the development of bi-functional catalysts for zinc-air battery-driven CO 2 RR devices. We introduce a novel approach for synthesizing Fe 2 N/Fe 3 C species embedded in nitrogen-doped carbon nanofibers by electrospinning a solution of Hemin and polyacrylonitrile in N,N-dimethylformamide. The material has an exceptional catalytic performance, with a half-wave potential of 0.91 V versus RHE for the ORR and values of over 90% for both the selectivity and Faradaic efficiency for the CO 2 RR. The high catalytic performances are attributed to the strong coupling between the Fe 3 C/Fe 2 N heterostructure and the Fe-N-C sites in the nitrogen-doped carbon nanofibers. Notably, both Fe 3 C and Fe 2 N play distinct roles in both the ORR and CO 2 RR. This investigation indicates a way for designing advanced carbon-based bi-functional catalysts for use in this field.
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研究领域:
材料科学
·
电化学
·
可再生能源
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产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Juncheng Zheng,Han Song,Yuankun Yang,Haidong Li,Xuemei Luo,Shu Chen
Persulfate (PDS)-based advanced oxidation processes have emerged as promising methods for antibiotic removal, but achieving high catalytic efficiency for tetracycline (TC) degradation remains difficult. The catalytic performance of FeGCB-N in PDS activation depended on Fe content and pyrolysis temperature, with defect density and intermetallic compound formation largely determined by the pyrolysis temperature. The optimized Fe 0.2 GCB-N-800 exhibited remarkable PDS activation performance for tetracycline degradation, achieving over 99% removal within 65 min under conditions of 10 mg·L -1 TC, 1 mM PDS, and pH 3. X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) collectively indicate that surface oxygen-containing functional groups, defect sites, and intermetallic Fe compounds provide active sites for PDS activation by FeGCB. Electron paramagnetic resonance (EPR) and quenching results demonstrated that superoxide radicals (O 2 •- ) and sulfate radicals (SO 4 •− ) were the primary reactive species in TC degradation. Density functional theory (DFT) calculations indicate that Fe-N is the key active site for PDS activation. Based on DFT results and liquid chromatography-mass spectrometry (LC-MS) analysis, potential degradation pathways for tetracycline (TC) are proposed. ECOSAR toxicity assessment showed that the O 2 •- -mediated pathway would generate fewer toxic byproducts. This work offers an effective approach to design environment friendly catalysts from algae biomass for treating wastewater.
研究领域:
环境科学
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材料化学
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水处理技术
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催化
·
废弃生物质利用
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产品关联
DOI
PubMed
高影响因子
Biomaterials Advances
·
2026
·
IF 6.7
Rongrong Mu,Xiaowen Tang,Xinyan Huang,Yajie Ma,Huiming Lin
Fe 2 N@C nanospheres integrate NO release, PTT, and CDT for DFU therapy. • NIR-II-triggered hyperpyrexia amplifies POD-like activity of Fe 2 N@C. • Inorganic Fe 2 N@C acts as a novel NO donor with high release capacity. • Acidic biofilm microenvironment facilitates NO release and CDT activity. • Dynamic therapy possesses great potential on infective DFU therapy. Diabetic foot ulcer (DFU) is one of the most severe complications of diabetes, and its multiple pathological factors render treatment more challenging. We synthesized Fe 2 N@C nanomaterials to integrate synergistic photothermal therapy/chemical dynamic therapy/nitric oxide (PTT/CDT/NO) for DFU therapy. First, Fe 2 O 3 and urea were used as precursors to synthesize Fe 2 N@C nanomaterials via nitridation. The nanomaterial can serve as a new NO donor that releases NO triggered by H + and reactive oxygen species (H 2 O 2 and O 2 ). Furthermore, Fe 2 N@C possess superhigh peroxidase (POD)-like activity (V max = 21.1 Ms. −1 , pH 5.5), catalyzing endogenous H 2 O 2 into hydroxyl radicals ( OH). POD activity can also amplify NO and peroxynitrite (ONOO − ) production. In addition, Fe₂N@C nanomaterials reveal high near-infrared II (NIR-II) light harvest and photothermal conversion efficiency (43.94%). Hyperthermia also synergistically boosts POD-like activity and NO release. Under NIR-II laser irradiation, the combination of PTT/CDT and high NO concentration of can quickly clear bacterial infection. In addition, NO can down-regulate the expression of heat shock proteins (HSPs) to amplify PTT performance. Then, the mild NO supply (without irradiation) further facilitates the reversal of inflammation (M2 macrophage polarization) and tissue regeneration (angiogenesis). This dynamic synergistic therapy promotes fast normal DFU healing. Download: Download high-res image (259KB) Download: Download full-size image
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DOI
高影响因子
AICHE JOURNAL
·
2026
·
IF 4.4
Bingbing Liao,Fei Chen,Lingyu Jia,Shanshan Dang,Weifeng Tu,Zhenzhou Zhang,Yifan Han
Direct conversion of CO 2 toward isomerized heavy olefins remains a challenge. In this work, Fischer-Tropsch synthesis and light olefins oligomerization were coupled to produce isomerized heavy olefins from CO 2 hydrogenation on a bifunctional K/Fe 2 N- x M/ASA catalyst. A K/Fe 2 N-17.0%Ga/ASA achieved the highest selectivity (47.7%) toward C 4+ heavy olefins, among which the selectivity of isomerized olefins was as high as 32.2%. Ga species did not adsorb light olefins (e.g., ethylene) directly, but they boosted the adsorption of light olefins on ASA support. Besides, the addition of Ga promoted H 2 dissociation to generate Ga-H species, which further transferred onto ASA support to form additional Brønsted acid sites promoting oligomerization reaction that obeyed β-H elimination mechanism via alkoxide intermediates. This work developed not only a unique K/Fe 2 N as Fischer-Tropsch synthesis catalyst, but also an integrated system coupling Fischer-Tropsch synthesis and light olefins oligomerization to achieve high selectivity isomerized heavy olefins synthesis from CO 2 hydrogenation.
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DOI
高影响因子
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