JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiale Xing,Zhiqiang Xu,Daoxin Liu,Bing Xue,Fangfei Li
Developing high-performance non-noble metal-based electrocatalysts for oxygen evolution reaction (OER) is important for hydrogen production from water electrolysis. In this work, a unique method to simultaneously improve the catalytic activity and stability of NiFe 2 O 4 spinel is carried out through heterogeneous nucleation sintering. So that the resultant corrugated CoCr-LDH nanosheets can strongly combine onto NiFe 2 O 4 surfaces to form finned structures, which enhances the surface area and OER catalytic performance of the resultant catalysts. The optimized NiFe 2 O 4 @CoCr-LDH/NF exhibits excellent OER performance with a low overpotential of 193 mV at 10 mA cm −2 and a low Tafel slope (27.5 mV dec −1 ), and outstanding stability performance. Furthermore, the NiFe 2 O 4 @CoCr-LDH/NF also displays attractive bifunctional catalytic activities, which achieves an ultra-low voltage for overall water splitting of 1.546 V at 10 mA cm −2 . These results indicate that NiFe 2 O 4 @CoCr-LDH/NF is a promising low-cost catalyst for hydrogen production through water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Yingchun Li,Minggang Zhao,Jing Chen,Sisi Fan,Jingjing Liang,Longjiang Ding,Shougang Chen
In this work, self-assembled NiFe 2 O 4 /carbon nanotubes (CNTs) sponge was prepared by ice-templating method. The device synergized the advantageous features of both the 3D porous nanostructure and the catalytic properties of CNTs with GOx and NiFe 2 O 4 nanoparticles. The porous network construction of the NiFe 2 O 4 /CNTs sheets offered enlarged specific surface for GOx immobilization and opened channels for facilitating the electrons transport and reactants diffusion. With the help of the abnormal-valence elements Ni and Fe, double catalysis has happened and the enhanced glucose biosensing performance has been achieved. The fabricated glucose biosensor exhibited two large linear ranges (0–3.0 and 3.2–12.4 mM) and distinct sensitivities (84.1 and 24.6 μA mM −1 cm −2 ).
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 4
·4152
·
IF 5.6
Chao Jin,Zigang Wang,Chang Luo,Chunling Qin,Yongyan Li,Zhifeng Wang
As high-capacity anode materials, spinel NiFe2O4aroused extensive attention due to its natural abundance and safe working voltage. For widespread commercialization, some drawbacks, such as rapid capacity fading and poor reversibility due to large volume variation and inferior conductivity, urgently require amelioration. In this work, NiFe2O4/NiO composites with a dual-network structure were fabricated by a simple dealloying method. Benefiting from the dual-network structure and composed of nanosheet networks and ligament-pore networks, this material provides sufficient space for volume expansion and is able to boost the rapid transfer of electrons and Li ions. As a result, the material exhibits excellent electrochemical performance, retaining 756.9 mAh g−1at 200 mA g−1after cycling for 100 cycles and retaining 641.1 mAh g−1after 1000 cycles at 500 mA g−1. This work provides a facile way to prepare a novel dual-network structured spinel oxide material, which can promote the development of oxide anodes and also dealloying techniques in broad fields.Keywords:NiFe2O4;dealloying;porous;lithium-ion batteries
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
PubMed
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
RSC Advances
·
2018
·Vol. 8
·期 10
·5441-5450
·
IF 2.936
Yongmei Xia,Zuming He,Yalin Lu,Bin Tang,Shunping Sun,Jiangbin Su,Xiaoping Li
Novel multifunctional SrTiO3/NiFe2O4 nanocomposites were successfully fabricated via a two-step route. The as-prepared samples were characterized by using X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), field-emission transmission electron microscopy (TEM), UV-visible diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy and vibrating sample magnetometry (VSM). The results indicate that the SrTiO3/NiFe2O4 heterostructures are composed of SrTiO3 spheroidal nanoparticles adhered to NiFe2O4 polyhedra. The heterojunction established in the composite material accelerates the process of electron–hole pair separation and boosts the photo-Fenton reaction. Among the samples, 15 wt% SrTiO3/NiFe2O4 nanocomposites exhibit a powerful light response and excellent room temperature ferromagnetism. Subsequently, the photocatalytic degradation of RhB over the as-prepared samples was investigated and optimized, revealing that the 15 wt% SrTiO3/NiFe2O4 nanocomposites exhibit the best photocatalytic activity and stability under simulated solar light irradiation. Furthermore, according to experimental results, the possible mechanism of improved photocatalytic activity was also proposed.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2020
·Vol. 45
·期 2
·3305-3314
·
IF 3.741
Zhong Ma,Shuai Zhang,Yonggang Lu
Summary NiFe 2 O 4 presents high redox activity and good promoted application prospect in chemical looping processes. However, phase segregation caused by outward diffusion of Fe cations often lead to low cycling stability for NiFe 2 O 4 . In this study, the inherent mechanism of phase segregation for NiFe 2 O 4 was investigated deeply. The results indicated that reduction degree exhibited significant influence on the phase segregation of NiFe 2 O 4 in successive redox cycles. When NiFe 2 O 4 was reduced to Ni and Fe 3 O 4 in redox cycles, NiFe 2 O 4 displayed stable redox activity without phase segregation. As the reduction degree reached to FeO and FeNi, a needle-like structure with Fe enrichment was formed on the surface of the first cycled NiFe 2 O 4 . In the subsequent redox cycles with deep reduction degree, both severe phase segregation and deactivation were occurred for spent NiFe 2 O 4 sample. It can be seen that phase segregation is the main reason for the deactivation of NiFe 2 O 4 instead of surface sintering in redox cycles. The results of this work provide guidance for the development of NiFe 2 O 4 -based oxygen carriers with high redox performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Results in Physics
·
2019
·
IF 3.042
Dongyong Shan,Jun He,Lianwen Deng,Shuoqing Yan,Heng Luo,Shengxiang Huang,Yunchao Xu
Incorporation of magnetic loss component is more favorable to high-performance microwave absorbing materials. In this paper, the NiFe 2 O 4 -decorated Ti 3 C 2 T x MXene composites were synthesized by the in-situ chemical co-precipitation method. The magnetic NiFe 2 O 4 nanoparticles were attached on the surfaces or inserted into the interlayers of Ti 3 C 2 T x MXene. Interestingly, we reduced effectively complex permittivity and enhanced magnetic loss by increasing the NiFe 2 O 4 content on Ti 3 C 2 T x MXene. Stronger electromagnetic attenuation ability and preferable impedance matching property were achieved and considered to be responsible mainly for improving absorbing peaks as well as bandwidth of the NiFe 2 O 4 -Ti 3 C 2 T x MXene composite. In particular, the NiFe 2 O 4 -Ti 3 C 2 T x -20 sample exhibited an optimal effective absorption bandwidth ( RL < −10 dB) of 7.68 GHz with the material thickness of only 1.5 mm. These findings are believed to pave the way of further promoting microwave absorption performance of Ti 3 C 2 T x MXene from magnetic functionalized decoration of view.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yadong Jia,Zhaohaitan Zhu,Jianbang Ge,Lei Dai,Mingyong Wang
Stable inert anode presents a promising alternative to active graphite anodes in molten salt electrolysis, offering a significant reduction in CO 2 emissions. However, developing such anodes remains a significant challenge. In this study, a novel metal-spinel cermet inert anode for use in CaCl 2 -based molten salts was introduced. Three spinel materials—NiFe 2 O 4 , MgFe 2 O 4 , and MgAl 2 O 4 —were synthesized and their electrochemical properties were compared. It was observed that NiFe 2 O 4 emerged as the most effective spinel ceramic. Subsequently, 20 wt%(50Cu-Ni)- x NiO-NiFe 2 O 4 ( x = 0, 10, 20) were prepared and evaluated. Furthermore, according to polarization behavior, density, and conductivity, the 20 wt%(50Cu-Ni)-10NiO-NiFe 2 O 4 anode exhibited superior performance in CaCl 2 -CaO molten salt, which outperformed conventional SnO 2 inert anodes. Its corrosion rate was measured at only 1.25 × 10 −3 g cm −2 h −1 over 20 h of electrolysis. Additionally, carbon spheres were successfully prepared using the 20 wt%(50Cu-Ni)-10NiO-NiFe 2 O 4 cermet anode in CaCl 2 -5 wt% CaCO 3 molten salt, thereby achieving a current efficiency of ∼85.5 %. The NiFe 2 O 4 -based cermet exhibited significant potential as an inert anode for sustainable metallurgical processes.
研究领域:
冶金学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 23
·21325-21334
·
IF 2.22
Liu Houbao,Fu Renli,Su Xinqing,Wang He,Wu Binyong,He Qinjiang
With the development of electronic components towards high power, high packaging density, and miniaturization of device size, heat dissipation and the electromagnetic interference problems between the electronic components are emerging. In order to solve the undesirable electromagnetic wave and heat emissions produced by electronic device simultaneously, the electronic packaging materials with high thermal conductivity and anti-electromagnetic interference are highly expected. In this work, NiFe 2 O 4 -modified short carbon fibers (SCF) were designed and prepared. NiFe 2 O 4 were in situ grown on the surface of SCF by hydrothermal method. The chemical structure and morphology of SCF-NiFe 2 O 4 were characterized by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The microwave absorbing performance test shows that SCF-NiFe 2 O 4 possess superior microwave absorbing performance, where the minimum reflection loss is − 20.7 dB. Finally, SCF-NiFe 2 O 4 /epoxy resin composites were prepared by introducing SCF-NiFe 2 O 4 as thermal conductive filler into epoxy resin. The surface-modified SCF with NiFe 2 O 4 is more easily infiltrated by resin and exhibits strong interfacial interaction with the matrix. With the increase of the content of SCF-NiFe 2 O 4 , the thermal conductivity of the composites increases obviously. When the content of SCF-NiFe 2 O 4 reaches 20 vol%, the composites show better thermal conductivity, and the thermal conductivity reaches 1.03 W/m K.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Kun Zhao,Xiaojie Fang,Zhen Huang,Guoqiang Wei,Anqing Zheng,Zengli Zhao
Chemical looping gasification provides a novel technology to enable clean conversion of coal with inherent CO 2 capture. In this study, four types of NiFe 2 O 4 and CuFe 2 O 4 synthesized by sol–gel method and solid-phase method were used as oxygen carriers to promote the H 2 production from gasification of lignite. The effects of the types of oxygen carrier and oxygen carrier to coal (O/C) ratio on chemical looping gasification of lignite were first investigated by a thermogravimetric analyzer (TGA) combing with various analytical methods. The results show that, among four types of oxygen carrier, the NiFe 2 O 4 synthesized by sol–gel method exhibits the highest gasification reactivity with lignite char at an O/C ratio of 1, since its highly cubic spinel structure is beneficial to improve the mobility of lattice oxygen. Furthermore, the operating conditions for chemical looping gasification of lignite were optimized and the gasification performance of four types oxygen carriers was compared by using a fixed bed reactor. It is found that NiFe 2 O 4 synthesized by sol–gel method exhibits the highest total gas yield of 24.47 mol/kg and H 2 /CO ratio of 0.77 during chemical looping gasification of lignite under the optimal operating conditions, ascribed to Fe-Ni synergistic effect which provided higher gasification reactivity with lignite char. The addition of steam drastically improves the total gas yield and H 2 /CO ratio of syngas from 24.47 mol/kg and 0.77 to 64.98 mol/kg and 2.79, suggesting that the H 2 /CO ratio of syngas can be flexibly adjusted to meet the need of downstream process via controlling the amount of steam added. These findings provide an efficient method to obtain H 2 -rich syngas via chemical looping gasification of lignite.
研究领域:
能源科学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 14
·1188
·
IF 4.4
Hongyang Wu,Chen Chen
The efficient detection of n-butanol, which is in demand for highly sensitive materials, is essential for multiple applications. A nonaqueous method was applied to prepare NiFe2O4nanoparticles (NPs) using benzyl alcohol as a solvent, which shows a size of 7.9 ± 1.6 nm and a large surface area of 82.23 m2/g. To further improve the sensing performance for n-butanol, Pd/PdO functionalization was sensitized with NiFe2O4NPs. Gas sensing results demonstrate that the Pd/PdO-NiFe2O4exhibits an enhanced response of 36.9 to 300 ppm n-butanol and a fast response and recovery time (18.2/17.6 s) at 260 °C. Furthermore, the Pd/PdO-NiFe2O4-based sensor possesses a good linear relationship between responses and the n-butanol concentration from 1 to 1000 ppm, and great selectivity against other volatile organic compounds (VOCs). The excellent sensing enhancement is attributed to the catalytic effects of Pd/PdO, the increase of oxygen vacancies, and the formation of heterojunction between PdO and NiFe2O4. Thus, this study offers an effective route for the synthesis of Pd/PdO-functionalized NiFe2O4NPs to achieve n-butanol detection with excellent sensing performance.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2022
·Vol. 28
·期 1
·233
·
IF 4.927
Qing Sun,Xin Yang,Tie Shu,Xianfeng Yang,Min Qiao,Dashuang Wang,Zhaohui Liu,Xinghua Li,Jinsong Rao,Yuxin Zhang,Pingan Yang,Kexin Yao
Recently, the development of composite materials composed of magnetic materials and MXene has attracted significant attention. However, the thickness and microwave absorption performance of the composite is still barely satisfactory. In this work, the C-N@NiFe2O4@MXene/Ni nanocomposites were successfully synthesized in situ by hydrothermal and calcination methods. Benefiting from the introduction of the carbon-nitrogen(C-N) network structure, the overall dielectric properties are improved effectively, consequently reducing the thickness of the composite while maintaining excellent absorption performance. As a result, the minimum reflection loss of C-N@NiFe2O4@MXene/Ni can reach −50.51 dB at 17.3 GHz at an ultralow thickness of 1.5 mm, with an effective absorption bandwidth of 4.95 GHz (13.02–18 GHz). This research provides a novel strategy for materials to maintain good absorption performance at an ultralow thickness level.Keywords:electromagnetic wave absorption;MXene;NiFe2O4
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）