CARBON
·
2025
·
IF 11.6
Haotian Jiang,Yanxiang Wang,Chengjuan Wang,Yingfan Li,Shichao Dai,Bohan Ding,Jinghe Guo,Yanru Yuan,Dongming Liu,Hui Li
To develop multi-functional microwave-absorbing materials, the FeCoNi/MoS 2 @carbon nanotubes (CNTs)/carbon nanofibers (CNFs) aerogels were synthesized by anchoring FeCoNi and MoS 2 onto an aerogel skeleton via directional freeze-drying and catalytic chemical vapor deposition (CCVD). Through CCVD, a diverse array of heterointerfaces was successfully constructed and defect-containing CNTs were introduced, thereby improving the impedance mismatch of carbon-based aerogels while achieving outstanding microwave absorption performance. The composite aerogel results in a minimum reflection loss of −84.18 dB at the thickness of 1.85 mm and an effective absorption bandwidth of 5.40 GHz at the thickness of 1.75 mm with a 13 % filler ratio. The excellent electromagnetic wave absorbing ability is mainly ascribed to the formation of three-dimensional conduction network, abundant heterogeneous interfaces, and the introduction of magnetic loss. Density functional theory calculations further elucidate that the enhanced dielectric properties arise from asymmetric charge distribution at heterogeneous interfaces (FeCoNi–C and MoS 2 –C), which amplifies interfacial polarization, while the increased density of states optimizes conduction loss. Additionally, the composite aerogels exhibit exceptional thermal insulation and infrared stealth performance. This work pioneers a novel pathway method for multifunctional aerogels using CCVD.
研究领域:
材料科学
·
纳米复合材料
·
功能材料
·
电磁学
·
热物理学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Fangshuo Liu,Shiyu Xia,Ala’a Mhmoued Abdllh Alboull,Zhiyong Dong,Hongzhan Liu,Chengda Meng,Fengxia Wu,Guobao Xu
Metal-organic gels (MOGs) are a category of metal-organic smart soft materials with large specific surface areas, loose porous structures, and open metal active sites. In this work, trimetallic Fe(III)Co(II)Ni(II)-based MOGs (FeCoNi-MOGs) were synthesized at room temperature via a simple and mild one-step procedure. Fe3+, Co2+, and Ni2+ were the three central metal ions in it, while 1,3,5-benzenetricarboxylic acid (H3BTC) served as the ligand. The solvent enclosed in it was then removed by freeze-drying to get the corresponding metal-organic xerogels (MOXs). The as-prepared FeCoNi-MOXs have excellent peroxidase-like activity and can significantly enhance luminol/H2O2 chemiluminescence (CL) by more than 3000 times, which is very effective compared with other reported MOXs. Based on the inhibitory effect of dopamine on the CL of the FeCoNi-MOXs/luminol/H2O2 system, a simple, rapid, sensitive, and selective CL method for dopamine detection was established with a linear range of 5–1000 nM and a limit of detection of 2.9 nM (LOD, S/N = 3). Furthermore, it has been effectively used for the quantitative measurement of dopamine in dopamine injections and human serum samples, with a recovery rate of 99.5–109.1%. This research brings up prospects for the application of MOXs with peroxidase-like activity in CL.
研究领域:
材料科学
·
分析化学
·
生物传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yang Yang,Yunhua Song,Shudi Mo,Mingyang Liu
Morphological design to expose more active sites and surface defect engineering to regulate the electronic structure are the two main methods to improve material properties. It is also well documented that metal sites in high valence states are beneficial to the OER process. Herein, we combine the advantages of the above three methods to fabricate extraordinary catalysts just by facile adjusting the Fe content. The catalysts with different Fe contents exhibit excellent activity and outstanding stability beyond the yardstick material (RuO 2 ) in alkaline condition. The resultant FeCoNi (oxy)hydroxide nanosheets is one of the most active trimetal-based oxygen evolution catalysts to date. Specifically, the resultant Fe 1.25 (Co 2 Ni 1 ) 2.5 (oxy)hydroxide can deliver a minimum overpotential of 212 mV to reach the current density of 10 mA cm −2 with a small Tafel slope of 52 mV dec −1 and a negligible activity attenuation after excess 72 h long-term test at 100 mA cm −2 . Most importantly, when use Fe 1.25 (Co 2 Ni 1 ) 2.5 (oxy)hydroxide as a water splitting anode, an electrolyzer delivers a current density of 10 mA cm −2 at a very low cell voltage of 1.51 V. This excellent performance is attributed to the large number of active sites exposed by the nanosheets, the active center of the catalyst to the higher valence state and the large number of oxygen defects produced. This work can provide more valuable insights to promote the development of the highly efficient oxygen evolution for applications.
研究领域:
材料科学
·
电化学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 17
·4339-4345
·
IF 4.853
Yuanxin Du,Xin Ding,Meng Han,Manzhou Zhu
Graphical Transition-metal phosphides : A series of ternary FeCoNi-PBAs (from truncated octahedrons to cubic octahedrons and truncated cubes) were obtained by temperature control surfactant desorption ability. The derived FeCoNi−Ps showed better OER activity than RuO 2 , especially FCN-40-P exhibited optimal performance because its appropriate composition promotes OH − adsorption, as confirmed by XPS analyses. Prussian blue analogues (PBAs) are mostly binary metallic compounds with a cubic structure, which greatly limits the structure and component of derived transition-metal phosphides (TMPs) and affects their catalytic activities. This work focuses on regulating the morphology and composition of the PBA at the front-end to optimize the OER performance of the derived TMP. By temperature control surfactant desorption ability, we obtain a series of ternary FeCoNi (FCN-PBAs). With the increase of temperature, their morphologies change from truncated octahedrons to cubic octahedrons and truncated cubes, in which the Fe content basically remains unchanged and the Co/Ni ratio gradually decreased. Due to the synergistic effect among ternary TMPs, all phosphidation products (FCN-P) exhibit better OER activities than RuO 2 , among which FCN-40-P shows the best performance. As confirmed by XPS analyses, the appropriate chemical composition enhances the oxidizabilityof TM species, promotes the chemical adsorption of OH − , and accelerates OER kinetics.
研究领域:
催化
·
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Xuan Liu,Zi-yu Zheng,Xuan Wang,Hao-rui Gao,Jia-qian Niu,Shi-qi Li,Yue-qin Duan,Xue-wei Wang
Improvement of catalyst dispersion is an effective strategy for performance enhancement of electrocatalytic oxygen evolution reaction (OER), while the heterogeneous structure can also regulate the electronic structure of the catalyst interface. In this paper, Cu 2 S nanorods were synthesized in situ on copper foam (CF) by alkaline etching and sulfidation, Subsequently, FeCoNi LDH nanosheets were electrodeposited on Cu 2 S nanorods to construct FeCoNi LDH/Cu 2 S heterojunctions. The electrochemical results demonstrate that FeCoNi LDH/Cu 2 S/CF exhibits high efficiency as an alkaline OER electrocatalyst with an overpotential of 211 mV at a current density of 100 mA cm −2 . Furthermore, FeCoNi LDH/Cu 2 S/CF can operate for 30 h and shows good cycling stability. The XPS results indicate that the electrons are transferred from FeCoNi LDH to Cu 2 S. The formation of the FeCoNi LDH/Cu 2 S heterojunction optimizes the interface at the heterojunction, thereby accelerating the electron transfer and optimizing the electronic structure at the interface. The uniform dispersion of FeCoNi LDH provides a high density of active sites and improves the mass transfer ability, thus enhancing the catalytic performance. This experimental strategy presents a generalized approach to improve the efficient electrochemical reaction of layered double hydroxides.
研究领域:
电催化
·
材料科学
·
能量存储与转换
·
纳米材料
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Lei Yang,Ziyi Zhao,Wanxin Wu,Yujue Li,Ziyuan Zhao,Jiahui Wang,Le Xu,Xueqin Yuan
FeCoNi/C hybrid nanowires serve as free-standing anodes for LIBs. • FeCoNi/C outperforms Fe/C and FeCoNiMn/C in LIB performance. • Diameter optimization of free-standing anodes can enhance the performance of LIB. Designing an integrated anode architecture that eliminates the need for binders and conductive agents is a promising approach to enhance both the energy density and rate capability of lithium-ion batteries (LIBs). Herein, we report the synthesis of free-standing Fe/C, FeCoNi/C and FeCoNiMn/C hybrid nanowire electrodes prepared by a facile electrospinning technique followed by a reduction treatment in Ar/H 2 atmosphere. The resulting C nanowire networks, embedded with uniformly distributed alloy nanoparticles, can be directly utilized as the anodes of LIBs. Electrochemical characterizations reveal that the FeCoNi/C-25 G electrode demonstrates superior cycling stability and rate capability compared with the Fe/C-25 G and FeCoNiMn/C-25 G counterparts, delivering a reversible capacity of 518.2 mAh/g after 100 cycles at 100 mA/g with a capacity retention of 84.5%. Furthermore, by varying the electrospinning needle gauge (19 G, 25 G and 30 G, the needle inner diameters are 0.75 mm, 0.26 mm and 0.16 mm, respectively), we optimized the nanowires diameter and found that the FeCoNi/C-30 G electrode exhibits the best performance, with a capacity of 564.4 mAh/g at 100 mA/g and 402.3 mAh/g at an ultrahigh current density of 4000 mA/g. The high performance of FeCoNi/C-30 G is attributed to the synergistic effects of the multi-component alloy system and the conductive C network. The reduced nanowire diameter also contributes to the excellent performance because it can facilitate ion/electron transport, increase active-site exposure and improve structural stability. This work offers a straightforward strategy for developing flexible, high performance binder-free anodes for next-generation LIBs.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Sain Bux Jamali,Tauqeer Haidar Qamar,Sibt ul Hassan,Abdullah Ali Alansi,Ijaz Ahmad,Shakeel Ahmad,Shengxiang Huang,Lianwen Deng
Growing health concerns over electromagnetic radiation necessitate the effective microwave-absorbing materials with lightweight and excellent performances. In this study, trimetallic FeCoNi nanoparticles embedded in N-doped porous carbon foams, as FeCoNi@NPCFs were successfully synthesized via polymer bubbling technique for microwave absorption. By adjusting the ratio of polyvinylpyrrolidone to metal nitrates, the electromagnetic wave absorption performance was effectively enhanced. Benefiting from the synergistic interaction between magnetic and dielectric loss components, the optimized composite exhibits outstanding microwave absorption performance, with reflection loss (RL) of −45.12 dB and effective absorption bandwidth (EAB) of 4.91 GHz. Furthermore, the practical microwave absorption performance was evaluated using computer simulation technology (CST). This work demonstrates a scalable one-pot fabrication strategy for advanced microwave absorbers, offering promising solution for electromagnetic interference shielding in modern electronic and communication systems.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 12
·3585-3595
·
IF 6.1
Haoyu Li,Yawei Xiao,Xu Tian,Xinxin Xing,Minhua Cao,Yude Wang
Electrochemical water splitting is crucial for sustainable energy and environmental conservation, meeting global energy needs while addressing environmental concerns. However, unlocking its potential requires addressing substantial technical and scientific challenges. Crystalline/amorphous composite catalysts represent a significant advancement in water-splitting research, with unique structural compositions and tailored properties that outperform conventional catalysts, thereby enhancing the efficiency and performance in essential aspects. In this study, crystalline/amorphous-structured FeCo alloy/FeCoNi-Pi (phosphate) was synthesized through one-step electrodeposition on Ni foam (NF). While FeCo alloy demonstrates excellent conductivity, the incorporation of FeCoNi-Pi enhances active site availability, improves hydrophilicity, and optimizes electrocatalytic reaction kinetics. Consequently, crystalline/amorphous FeCo alloy/FeCoNi-Pi required significantly lower overpotentials of 77/233 mV for the hydrogen/oxygen evolution reaction (HER/OER) compared to the FeCo alloy to acquire 10 mA cm−2 current density in an alkaline environment. A complete cell comprised of crystalline/amorphous FeCo alloy/FeCoNi-Pi electrodes exhibits remarkable long-term stability and demonstrates a relatively lower voltage of 1.56 and 1.69 V, enabling 10 and 100 mA cm−2 current densities. This crystalline/amorphous composite strategy has been proven effective in designing FeCo alloy-based electrocatalysts to achieve efficient hydrogen production.
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Bo Yang,Hanqing Yu,Zheng Zeng,Yujia Zhang,Ni Yang,Yan Chen,Yanqing Hou,Gang Xie
The increasingly complex electromagnetic environment demands electromagnetic wave absorption materials that are thin, broadband, and engineering-scalable; however, achieving excellent impedance matching while maintaining high-efficiency electromagnetic attenuation remains a major technical challenge. Here we propose a second-scale, high-temperature in situ synthesis strategy based on Joule flash heating. Under extreme conditions approaching 2000 ℃, this method enables the efficient fabrication of reduced graphene oxide (rGO)-encapsulated binary and ternary Fe–Co–Ni nanoalloys (FeNi@rGO, CoNi@rGO, FeCo@rGO and FeCoNi@rGO). The resulting composites feature a continuous conductive network and intimate magnetic–dielectric interfaces, where the synergy between dielectric loss and magnetic loss markedly improves impedance matching. The composites deliver a minimum reflection loss as low as −56.1 dB at a matching thickness of only 1.5 mm, together with a broadband absorption bandwidth of up to 4.4 GHz. These results highlight the strong potential of this material platform for high-performance electromagnetic wave absorption applications. This work not only offers an efficient and green route to advanced electromagnetic wave absorbers, but also provides new insights into the understanding and regulation of coupled dielectric–magnetic loss mechanisms in composites, thereby enabling the rational design of high-performance absorbers.
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Yun Hu,Wei Wang,Fang Han,Zhicheng Wang,Qingqing Guo,Tianyu Chen,Fei-Yan Yi
The oxygen evolution reaction (OER) remains a major bottleneck in electrochemical water splitting due to its sluggish kinetics and high overpotential. Replacing the OER with thermodynamically more favorable oxidation reactions, such as the urea oxidation reaction (UOR) and methanol oxidation reaction (MOR), offers a promising strategy to reduce energy consumption while enabling value-added chemical production or wastewater treatment. In this work, a hydrangea-like trimetallic FeCoNi nanoalloy grown on nickel foam (FeCoNi/NF) and its nanosulfide (S–FeCoNi/NF) are developed as a unified electrocatalytic platform for OER, UOR, and MOR. The S–FeCoNi/NF electrode exhibits significantly enhanced performance, achieving an overpotential of 196 mV for OER and low operating potentials of 1.348 and 1.325 V for UOR and MOR, respectively, at 10 mA cm–2, surpassing the undoped FeCoNi/NF, outperforming most of the reported electrocatalysts. Experimental results reveal that sulfur doping effectively modulates the electronic structure, increases active site availability, and accelerates the reaction kinetics. This work highlights the potential of ternary transition metal sulfides as multifunctional electrocatalysts for energy-saving hydrogen production coupled to organic oxidation.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 38
·13447-13459
·
IF 7.393
Junyao Shen,Danfeng Zhang,Qibai Wu,Yan Wang,Heng Gao,Jiale Yu,Guoxun Zeng,Haiyan Zhang
Given its easy-to-tailor microstructure with mixed nanodomains including amorphous and pseudo-graphitic parts, hard carbon (HC) as a type of non-graphitizable carbon promises to play a role in extended selection for novel metal/carbon microwave absorbers. Herein, we report the preparation of FeCoNi@HC composites as electromagnetic (EM) absorbers at different pyrolysis-controlled temperatures, derived from FeCoNi nanosheets (NSs)@polyimide (PI) composites. According to suitable pyrolysis treatments, FeCoNi@HC composites exhibit a wide range of mixed morphologies constituted of nanosheets and nanoparticles: original FeCoNi NSs are thermally converted into a particle-like structure as the core; the HC derived from the polyimide (PI) matrix inherits the original framework of the FeCoNi NSs for varying degrees of pyrolysis as the shell. The heat treatments also strongly influence the inner HC structural properties, including defect feature and graphitization degree. Treated by a moderate degree of pyrolysis, the optimal sample achieves decent enhancements of lossy attenuations (e.g., dielectric/magnetic losses) and promoted impedance matching for excellent EM absorption performances. The minimum reflection loss (RL) of the optimal sample is −61.12 dB, along with an effective absorption bandwidth (RL ≤ −10 dB) of 5.53 GHz. We anticipate that this work may enrich the survey of metals/carbon absorbers with non-graphitizable carbon supports.
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
·
2023
·
IF 5.2
Linjing Qiao,Jianqiang Bi,Yao Yang,Guandong Liang,Shaoyin Wang,Hongyi Wang
Nowadays, the increasingly severe electromagnetic (EM) wave pollution requires high-performance EM wave absorbing materials. Multi-principal-element materials are acknowledged as promising for broadening the applications owing to their tunable chemistries and structures in many fields, including as EM wave absorbers. Herein, we prepared a high-entropy MXene , (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x . Furthermore, multi-principal-element (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNi and (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNiCu composites were synthesized via an in-situ hydrothermal process by combining high-entropy MXene with medium-entropy magnetic alloys . In contrast with the relatively narrow effective absorption bandwidth (EAB) of (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x MXene (2.56 GHz), (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNi composite with 50 wt% MXene can attain an optimum EAB of 4.88 GHz with the matching thickness of only 1.73 mm. As for (Mo 0.25 Cr 0.25 Ti 0.25 V 0.25 ) 3 C 2 T x /FeCoNiCu composites, both the absorption efficiency and absorption bandwidth are significantly enhanced. The combination of multi-principal-component strategy and composite construction endows the composites with synergistic dielectric and magnetic losses, optimized impedance matching as well as enhanced attenuation ability, thus improving EM wave absorption performances. In addition, radar cross section (RCS) simulation confirms that the prepared composites have broad application prospects as radar stealth materials.
研究领域:
材料科学
·
电磁工程
·
复合材料
✓ 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）