NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 33
·13962-13970
·
IF 3.288
Hengdong Ren,Jialin Ma,Jun Zhou,Xiangfeng Shu,Zhenying Liu,Yin Liu,Yan Zhao,Tao Ge,Fanfei Min,Ling Bing Kong
Anthracite-based carbon/Ni3Fe/NiO ternary composites were synthesized by using a microwave radiation method at a frequency of 915 MHz. Phase and elemental compositions of the composites were investigated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). According to FESEM observations, Ni3Fe and NiO particles are uniformly implanted into grid-like porous structures and interlayers on the surface of anthracite-based carbon. The carbonization was realized at 700 °C, which could be attributed to the presence of a large number of polar molecules in anthracite that responded actively to microwave irradiation. The oxygen-containing functional groups in anthracite-based carbon provide multiple relaxation processes. Therefore, the composites exhibited a minimum reflection loss of −51.66 dB at 5.52 GHz, with effective absorption covering the S and C bands. Importantly, this result shows a facile method for preparing coal-based carbon/magnetic powder, which utilizes the rapid reaction of microwave radiation.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Ting Zhao,Han Zhang,Hai-Hong Zhang,De-Qiang Yi,Jian-Feng Zhu,Yi Qin
The rapid development of communications technology has exacerbated the deterioration of the electromagnetic environment and therefore there is an urgent need to develop efficient electromagnetic wave absorbing materials. Based on the idea of constructing the ferrite-alloy-glass multiphase heterogeneous microstructure, core-shell-like NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites has been successfully prepared by using sol-gel, hydrothermal and in situ reduction methods. In which, NiFe 2 O 4 and Ni 3 Fe provide strong magnetic and dielectric losses , while the introduction of the LAS (Lithium aluminum silicate, Li 2 O–Al 2 O 3 –SiO 2 glass) wave-transparent phase modulates the complex dielectric constant, and effectively improving impedance matching. The multi-component nature of NiFe 2 O 4 /Ni 3 Fe/LAS produces abundant heterogeneous interfaces, and the strong interfacial polarization contributes to the attenuation of electromagnetic waves. At the thickness of 2.3 mm, the reflection loss (RL) of NiFe 2 O 4 /Ni 3 Fe/LAS reaches −50.7 dB at 11.36 GHz with an effective absorption bandwidth (EAB) of 5.04 GHz, while at 2.0 mm the EAB is up to 7 GHz. Importantly, the NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites achieve effective absorption (RL < −10 dB) in the C, X and Ku bands (5–18 GHz). This work is expected to offer prospects for high-performance and ultra-broadband composite microwave-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2021
·
IF 4.833
Hengdong Ren,Jialin Ma,Zaisheng Zhu,Zhenying Liu,Yin Liu,Ling Bing Kong,Fanfei Min,Jinbo Zhu
Coal-derived carbon/Ni 3 Fe magnetic composites with frequency dependent microwave absorption performance were prepared at low temperatures (750–850 °C) using coal as the carbon source. The Ni 3 Fe alloy was successfully formed due to the carbothermal reaction and reducing gas. SEM images indicate the surface becomes rougher and the number of interlayer of the composites increases with increasing reaction temperature. Consistently, high degree of graphitization of the coal-derived carbon was confirmed by using Raman spectroscopy. Specifically, coal-derived carbon/Ni 3 Fe magnetic composites exhibit frequency-dependent microwave absorption characteristics at 2–18 GHz, that is, as the reaction temperature rises from 750 °C to 850 °C, the minimum reflection loss gradually shifts to low frequencies. Among them, CC/Ni 3 Fe (8 0 0) -0.4 exhibits a minimum reflection loss of −60.76 dB at 16.64 GHz, while the thickness is only 1.28 mm. Such a clean strategy provides experience for the environmental application of coal and microwave absorption. Meanwhile, a lightweight, stable and efficient microwave absorber has been developed.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yan Wang,Chongmei Wu,Guiyang Xian,Zhaolin Zhu,Yin Liu,Ling Bing Kong
Polyaniline-derived carbon (PDC) and Ni 3 Fe composites for electromagnetic wave (EMW) absorption were prepared through in-situ polymerization and carbonization. Using polyaniline as carbon source not only realized the doping of carbon with nitrogen, but also allowed homogeneous dispersion of Ni 3 Fe nanoparticles to achieve multiple reflection interfaces. The content of Ni 3 Fe can be used to control the impedance matching of the composites, while the dual loss mechanism of dielectric loss and magnetic loss was realized to promote EMW absorption performance. The polyaniline-derived carbon/Ni 3 Fe (PDC/Ni 3 Fe) nanocomposite with optimized composition had a minimum reflection loss (RL) of − 80.91 dB. A maximum effective bandwidth of 6.10 GHz (11.90 −18.00 GHz) was achieved, while the thickness is 2.12 mm.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yongzhi Xiong,Shengchun Hu,Jianchun Jiang,Yajun Liu,Wei Zhao,Xialin Ji,Changzhou Chen,Mengmeng Fan,Kui Wang
Herein, a novel ball milling-pyrolysis strategy was proposed for preparing a highly dispersed Ni 3 Fe nanoalloy catalyst (Ni 3 Fe@NC) used for 5-hydroxymethylfurfural (HMF) electro-oxidation reaction. The Ni 3 Fe@NC delivered a high current density of 100 mA cm −2 at a low potential of 1.467 V vs RHE, with a HMF conversion rate of over 99.6 %, 2,5-furan dicarboxylic acid (FDCA) selectivity of 97.1 % and a Faraday efficiency of 96.7 %. Theoretical calculations, in-situ EIS, quasi-in-situ XRD and XPS demonstrated that Fe-doping optimizes the electronic structure of Ni 3 Fe@NC and regulates its d -band center, which not only promoted the reconstruction of Ni 3 Fe@NC to form high-oxidation-activity Ni 2+δ and Ni 3+δ species but also reduced the reaction barrier of the key rate-determining step (*5-Hydroxymethyl-2-furancarboxylic acid (HMFCA)→*5-formyl-2-furancarboxylic acid (FFCA)) during HMFOR. Based on this interesting work, we provided a facile macroscopic preparation strategy on highly dispersed nanoalloy catalyst for efficient electro-oxidation of HMF.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Zhiyu Shao,Jing Sun,Zhen Yan,Keke Huang,Fuli Tian,Hui Xue,Qin Wang
Among the groups of excellent electrode materials reported, Ni-Fe based catalyst is a topic of significant current interest for electrochemical water splitting. Furthermore, hierarchical structures are widely used in heterogeneous catalysis in various catalytic processes. A novel hybrid of Mo-doped Ni 3 Fe/Ni 3 FeN nanocatalyst was designed by using a facile method in this study. The Mo-Ni 3 Fe/Ni 3 FeN catalyst exhibits an outstanding catalytic performance for oxygen evolution reaction, as indicated by an ultralow overpotential of 240 mV at 10 mA·cm −2 and a small Tafel slope of 47 mV·dec −1 . This study provides an idea for the development of new eletrocatalysts with more electron transfer channels and higher electrocatalytic performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Wenlong Zhao,Huangbin Shangguan,Zhiyi Liu,Jing Lin,Congshu Huang,Hongyi Chen,Xiaoxiao Zhang,Jianzhi Wang,Faquan Yu
The design and fabrication of stable, high-performance, and affordable oxygen evolution reaction (OER) electrocatalysts is essential for performing practical water electrolysis and generating green hydrogen energy. Here, we report that 2D few layer Ni 3 Fe nanosheets embedded with 2D porous nitrogen doped carbon (N-Ni x Fe@CF) from asphalt waste and then convolved and assembled into 1D hollow nanotube structures by Lewis acid molten salt etching method, which were used as electrocatalysts for OER. Benefiting from the integrate of 1D hollow nanotube structure and 2D porous nanosheets, the close contact between catalysts and support, and the increased conductivity, the resultant N-Ni 3 Fe@CF catalysts exhibited high catalytic activities in the OER with low overpotential at a current density of 10 mA cm −2 (114 mV), low Tafel slope (166.6 mV dec −1 ), and excellent electrochemical stability. This work provides a new concept for expanding the use of asphalt wastes and by-products, as well as a straightforward synthesis method for producing economical, efficient, and long-lasting alkaline OER electrocatalysts.
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
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Haojie Wang,Chun Chen,Haimin Zhang,Guozhong Wang,Huijun Zhao
Bimetallic nanostructures have attracted great interest as efficient catalyst to enhance activity, selectivity and stability in catalytical conversion. Herein, we report a facile one-pot carbothermal route to in-situ controllable synthesize heterogeneous bimetallic Ni 3 Fe NPs@C nanocatalyst. The X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and N 2 adsorption-description results reveal that the Ni 3 Fe alloy nanoparticles are evenly embedded in carbon matrix. The as-prepared Ni 3 Fe NPs@C catalyst shows excellent selective hydrogenation catalytic performance toward the conversion of levulinic acid (LA) to γ-valerolactone (GVL) via both direct hydrogenation (DH) and transfer hydrogenation (TH). In DH of LA, the bimetallic catalyst achieved a 93.8% LA conversion efficiency with a 95.5% GVL selectivity and 38.2 mmol g −1 h −1 GVL productivity (under 130 °C, 2MPa H 2 within 2 h), which are 6 and 40 times in comparison with monometallic Ni NPs@C and Fe NPs@C catalysts, respectively. In addition, the identical catalyst displayed a full conversion of LA with almost 100% GVL selectivity and 167.1 mmol g −1 h −1 GVL productivity at 180 °C within 0.5 h in TH of LA. Under optimal reaction conditions, the DH and TH catalytic performance of 500-Ni 3 Fe NPs@C(3:1) catalyst for converting LA to GVL is comparable to the state-of-the-art noble-based catalysts. The demonstrated capability of bimetallic catalyst design approach to introduce dual-catalytic functionality for DH and TH reactions could be adoptable for other catalysis processes.
研究领域:
催化化学
·
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Tangying Liu,Yanyan Xiang,Zhengjie Tan,Wei Hong,Zhimin He,Jilan Long,Bin Xie,Rong Li,Xinglong Gou
Ni 3 Fe-Fe 3 C heterostructures well encapsulated in N-doped carbon nanotubes (Ni 3 Fe-Fe 3 C@NCNTs) were fabricated by a facile one-step pyrolysis-growth approach. Thanks to the merits of abundant active sites, multiple heterogeneous interfaces, large electrochemical active surface area, robust structure, self-supporting configuration and remarkable synergistic effect, Ni 3 Fe-Fe 3 C@NCNTs exhibits excellent bifunctional catalytic activity and stability toward both HER and OER in alkaline media. Moreover, the Ni 3 Fe-Fe 3 C@NCNTs||Ni 3 Fe-Fe 3 C@NCNTs electrolyzer requires an ultralow voltage of 1.80 V for overall water splitting to reach a current density of 300 mA cm −2 , and it keeps stable over 300 h for continuous hydrogen generation with 100% Faradaic efficiency, surpassing Pt/C||RuO 2 electrolytic cell and showing great promise for industrial application in green hydrogen production.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sen Lin,Jing Lin,Zhiqiang Xiong,Xue He,Xin Li,Chongbo Liu,Chengying Wang,Xiaojun Zeng,Xuliang Nie,Renchao Che
Magnetic carbon aerogels with high porosity, ultralow density, and excellent impedance matching are considered to be a promising microwave absorption (MA) material. In this study, ethylene glycol polymerization is used to assemble Ni 3 Fe particles into a micro-helical chain, which is further wrapped by MXene and then encapsulated in poly-Schiff-base aerogels through the carbonyl–amine condensation reaction. Finally, ultralight TiO 2 /Ni 3 Fe/MXene/C (NFMC) aerogels are synthesized through calcination treatment. Benefiting from the electromagnetic synergistic effect of multi-dimensional and multi-component materials, the NFMC-7 aerogel exhibits excellent MA performance with a minimum reflection loss of −61.6 dB at 3.0-mm thickness and an effective absorption bandwidth of 8.16 GHz at 2.77-mm thickness under a low filler loading of 7.6 wt%. Commercial computer simulation technology is used to verify the strong magnetic and dielectric loss characteristics of Ni 3 Fe chains. At the same time, the NFMC-7 aerogel exhibits excellent radar stealth, heat insulation, compression resistance, and fire resistance performance, which verifies its practical applicability. Overall, this work establishes an effective strategy to fabricate multi-functional magnetic aerogels, which can serve as lightweight, thin, and strong microwave absorbers with broad absorption bandwidth.
研究领域:
材料科学
·
电磁学
·
多功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Bo Xu,Xiaomei Wang,Xiaodong Yang,Zhiming Chen,Yiqiang Sun,Qisheng Liu,Cuncheng Li
Exploring of efficient electrocatalysts based on nonprecious metals is of great importance for the development of hydrogen energy and related energy conversion technologies. Metallic Ni 3 Fe nanoarray is firstly fabricated on carbon cloth as efficient oxygen evolution electrocatalyst. Co, N-dual doped carbon shell derived from metal organic framework is coated on the Ni 3 Fe nanoarray to enhance electrocatalytic activity and stability. The as-prepared composite catalyst only needs a low overpotential of 170 mV to drive 10 mA cm −2 current density in alkaline solution, and an overpotential of 370 mV in carbonate buffer solution. Moreover, the catalyst exhibit excellent durability in both alkaline and carbonate electrolyte. Good conductivity, rich active sites, fast electron transport process and synergistic effect between Ni 3 Fe and the doped carbon together contributes to the efficient catalytic performance. This synthesis approach provides a new way to develop efficient nonprecious metal based electrocatalysts for water oxidation and other energy-related applications.
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
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Feng Long,Shiyu Wu,Haitian Chen,Shuya Jia,Xincheng Cao,Peng Liu,Yanju Lu,Jianchun Jiang,Xiaolei Zhang,Junming Xu
Ni 3 Fe clusters anchored on rutile (R-TiO 2 ) were synthesized by hydrothermal (HT), coprecipitation (CP) and impregnation (IM) methods, and the catalytic performance of different NiFe/R-TiO 2 catalysts were investigated for hydrogenation of fatty acid into alcohol. Notably, HT-NiFe/R-TiO 2 catalyst, with the highest specific surface area and Ni 3 Fe nanoparticles dispersion, exhibited the best hydrogenation activity towards alcohol production, with complete conversion and yield reach of 92.5 % at 4 MPa H 2 , 210 ℃ and 6 h. The structure–reactivity relationship was investigated by a series of catalysts characterization, DFT calculation and corroborated through hydrogenation performance evaluations. Anchoring Ni 3 Fe clusters onto highly dispersed basic site surfaces with different Ov concentrations can change the electron distribution and strength of the metal-support interaction, causing more stable adsorption of the H and acids molecular toward fatty alcohol production. This work provides further insight into the structure–activity of NiFe/TiO 2 catalysts synthesized through different methods.
研究领域:
催化
·
化学工程
·
材料科学
·
表面化学
✓ 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）