JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yan Huang,Bowen Zang,Chang Zhang,Mingliang Xiang,Peng Xiao,Juntao Huo,Meng Gao,Rie Umetsu,Min Ji,Bingnan Yao,Yan Zhang,Yaocen Wang,Junqiang Wang
Coating soft magnetic powders by an insulation layer is an effective way to improve the high-frequency performance of soft magnetic powder cores. The quality of insulation coating is highly dependent of the coating materials and the coating method. In the present work, a commercial amorphous powder (Fe 73 Si 11 B 11 C 3 Cr 2 ) was primarily coated by a PDA/PEI layer by a co-deposition method in alkaline solution. A thick PDA/PEI layer with good homogeneity was co-deposited on the surface of amorphous soft magnetic powders. The high frequency core loss of magnetic powder cores was reduced by up to ~ 44 % at the magnetic induction of 0.1 T and the frequency of 100 kHz by primarily coating the amorphous powders by PDA/PEI. Microscopic images showed that the PDA/PEI coating layer on the amorphous powders does not peel off while being compressed. These results indicates that PDA/PEI insulation coating is a coating method which can effectively improve the comprehensive magnetic properties of magnetic powder cores.
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DOI
高影响因子
ChemCatChem
·
2025
·
IF 3.9
Xinquan Wu,Zhen Sun,Hao Li,Xiaolei Guo,Zhen-Feng Huang,Ruijie Gao,Chengxiang Shi,Xiangwen Zhang,Lun Pan,Ji-Jun Zou
Platinum-based catalysts are highly effective for the oxygen reduction reaction (ORR), but their prohibitive cost and insufficient activity impede large-scale commercialization. Herein, we report a Pt@Fe-NC electrocatalyst synthesized by depositing uniform platinum nanoparticles onto an iron–nitrogen–carbon (Fe–NC) support via an ethylene glycol reduction method. The Fe–NC support, prepared from an iron (II)-1,10-phenanthroline complex precursor to ensure high iron utilization, modulates the electronic structure of the Pt nanoparticles, thereby enhancing both catalytic activity and stability. The optimized Pt@Fe-NC catalyst (13.54 wt% Pt) exhibits exceptional ORR performance in acidic media, with a half-wave potential of 0.852 V and notable stability. When integrated into a zinc-air battery, the catalyst delivered a high specific capacity of 652.66 mAh g Zn −1 . Furthermore, a proton exchange membrane fuel cell (PEMFC) employing this catalyst achieved a high open-circuit voltage (OCV) of 0.964 V and a peak power density of 1.722 W cm −2 , outperforming most previously reported Pt-based catalysts. This study highlights a synergistic strategy between Pt nanoparticles and metal-nitrogen-carbon (M–N–C) supports to boost ORR performance, presenting a viable path toward advanced, cost-effective catalysts for energy conversion devices like PEMFCs and zinc-air batteries. Graphical A method of preparing Fe–NC loaded Pt nanoparticle catalysts is presented. The method is used to prepare Fe–NC substrate by loading iron complexes with 1,10-phenanthroline on carbon black and then Pt nanoparticles obtained by ethylene glycol reduction method are loaded on the Fe–NC substrate. The results show that the enhanced activity of the Pt@Fe-NC catalyst is due to the modification of the electronic structure of Fe on Pt in the Fe-NC support.
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ya-Nan Jing,Xing-Liang Yin,Lei-Lei Li,Yan-Lan Wang,Jia Xue,Ze-Feng Xu,Da-Qiang Liu,Chuan-Wu Chen,Xiao-Jie Liu,Er-Kang Liu
CO 2 -to-high value-added chemicals via a photocatalytic route is of interest but strangled by the low efficiency. Herein, a novel Fe-TiO 2-x /TiO 2 S-scheme homojunction was designed and constructed by using a facile surface modification approach whereby oxygen vacancy (OV) and Fe introducing on the TiO 2 nanorod surface. The as-synthesized Fe-TiO 2-x /TiO 2 S-scheme homojunction exhibits positive properties on promoting photocatalytic CO 2 reduction: i) the nanorod structure provides numerous active sites and a radical charge transfer path; ii) the doped Fe and OV not only synergistically enhance light utilization but also promote CO 2 adsorption; iii) the Fe-TiO 2-x /TiO 2 S-scheme homojunction benefits photoexcited charge separation and retains stronger redox capacity. Thanks to those good characters, the Fe-TiO 2-x /TiO 2 homojunction exhibits superior CO 2 reduction performances with optimized CO/CH 4 generation rates of 122/22 μmol g -1 h −1 which exceed those of pure TiO 2 by more than 9.4/7.3 folds and most currently reported catalytic systems. This manuscript develops a facile and universal approach to synthesize well-defined homojunction and may inspire the construction of other more high-efficiency photocatalysts toward CO 2 reduction and beyond.
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PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Lijun Guo,Feifei Li,Jianxin Liu,Rui Li,Zhuobin Yu,Qing Xi,Lulu Zhang,Yaru Li,Caimei Fan
Morphology regulation is a simple way to improve photocatalytic activity. In this work, a MIL-101(Fe) photocatalyst with cracked spindle morphology has been successfully prepared by EG pre-coordination solvothermal method . The cracking degree of MIL-101(Fe) can be regulated by adjusting pre-coordination time. The MIL-101(Fe) with the optimal uniform crack displays a best NH 3 evolution rate of 592 μmol h −1 g −1 under the visible light irradiation . Cracked MIL-101(Fe) is similar to a semi-exposed model, which can increase the number of reactive sites, improve refraction and reflection of light, and ultimately enhance the photocatalytic nitrogen fixation activity. This work developed a convenient strategy to improve the photocatalytic activity of nitrogen reduction by controlling morphology.
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高影响因子
CARBON
·
2021
·
IF 9.594
Zhouyu Tong,Zijian Liao,Yanyan Liu,Mingliang Ma,Yuxin Bi,Weibo Huang,Yong Ma,Mingtao Qiao,Guanglei Wu
Designing one-dimensional (1D) magnetic-carbon composites microwave absorbers is a promising strategy that can meet the current demand for high-performance microwave absorption (MA) materials. In this work, hierarchical structured Fe 3 O 4 /Fe@C@MoS 2 nanofibers were successfully obtained via a simple three-step method. 1D Fe 3 O 4 /Fe@C nanofibers were fabricated through electrospinning technology and in-situ polymerization followed by carbonization and reduction in H 2 /N 2 atmosphere. MoS 2 nanosheets grew irregularly on the surface of 1D Fe 3 O 4 /Fe@C nanofibers to form the flower-like structure. The morphology, composition and magnetism of samples were systematically investigated. Furthermore, electromagnetic characteristics and MA properties of Fe 3 O 4 /Fe@C nanofibers and Fe 3 O 4 /Fe@C@MoS 2 nanofibers were compared. The minimum reflection loss (RL min ) of Fe 3 O 4 /Fe@C@MoS 2 nanofibers could reach −53.79 dB at 11.12 GHz and the corresponding absorption bandwidth (RL < -10 dB) of 4.4 GHz was achieved at the absorber thickness of 2.24 mm. This work combines electrospinning technology with traditional chemical synthesis to prepare a novel 1D core-shell microwave absorber, which provides some inspiration for preparing MA material in the future.
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2014
·
IF 2.129
Jingyu Piao,Jia Lv,Xin Zhou,Tong Zhao,Xue Wu
A novel fluorescent chemosensor bearing a rhodamine and a dansyl moiety was developed for highly selective detection of Fe 3+ based on fluorescence resonance energy transfer (FRET) mechanism. Binding of Fe 3+ to the chemosensor induced spirolactam ring opening in the rhodamine moiety and subsequent off–on FRET from the dansyl energy donor to the rhodamine energy acceptor due to the spectral overlap between the emission of the dansyl moiety and the absorption of the ring opened rhodamine moiety. Job’s plot analysis indicated a 1:1 binding stoichiometry between the chemosensor and Fe 3+ . The association constant was estimated to be 2.72 × 10 3 M −1 according to the Benesi–Hildebrand method. With the feature of easy synthesis, simple structural skeleton and excellent sensing ability, the newly synthesized chemosensor provided the potential for applying as a highly selective fluorescent probe in complex samples containing various competitive metal ions and developing other metal ion chemosensors to fulfill various needs of biological and environmental field.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Ping Tang,Wenchao Jiang,Shuguang Lyu,Zhaofu Qiu,Qian Sui
The degradation of carbon tetrachloride (CT) by Fe(II) activated calcium peroxide (CaO 2 ) in the presence of ethanol (CH 3 CH 2 OH, EtOH) was investigated. The results showed that CT could be completely degraded in 20 min with 3.90 mmol L −1 CaO 2 , 5.20 mmol L −1 Fe(II) and 1.30 mmol L −1 EtOH in CaO 2 /Fe(II)/EtOH system. Superoxide radical anion (O 2 •− ) and hydroxyethyl radical ( • CHCH 3 OH, HER) were demonstrated as the main radicals for CT degradation which were confirmed by scavenging tests and electron paramagnetic resonance (EPR) detection. The mechanism of CT degradation was mainly due to the split of C–Cl and CT degradation pathway was proposed accordingly. Further investigation suggested that the solution pH in range of 3–5 were favorable to CT degradation. Both Cl − and HCO 3 − had inhibitive effect on CT removal, while the influence of NO 3 − and SO 4 2− could be negligible. Moreover, the results of experiments performed using actual groundwater demonstrated that an adverse impact occurred on CT degradation, but this drawback could be overcome by increasing reagent dosages. In summary, CT degradation in Fe(II) activated CaO 2 system can be significantly promoted by EtOH addition, and this finding, for the first time, provides an innovative technology for degradation of the highly oxidized organic contaminants.
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DOI
高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Xian Tong,Li Zhu,Yihao Wu,Yiting Song,Kun Wang,Shengbin Huang,Yuncang Li,Jianfeng Ma,Cuie Wen,Jixing Lin
Zinc (Zn)-based metals and alloys are emerging as promising biodegradable implant materials due to their inherent biodegradability and good biocompatibility. However, this class of materials exhibits low mechanical strength and a slow degradation rate, which hinders their clinical application. Here we report the development of a new biodegradable Fe/Zn–3Cu composite fabricated by infiltration casting of a Zn–3Cu alloy into an Fe foam followed by hot-rolling. Our results indicate that the hot-rolled (HR) Fe/Zn–3Cu composite exhibited an α-Zn matrix phase, a secondary CuZn 5 phase, and an α-Fe phase. The HR Fe/Zn–3Cu composite exhibited an ultimate tensile strength of 269 MPa, a tensile yield strength of 210 MPa, and an elongation of 27%. The HR Fe/Zn–3Cu composite showed a degradation rate of 228 µm/year after immersion in Hanks’ solution for 30 d The diluted extract of the HR Fe/Zn–3Cu composite exhibited a higher cell viability than that of the HR Zn–3Cu alloy in relation to MC3T3-E1 and MG-63 cells. Furthermore, the HR Fe/Zn–3Cu composite showed significantly better antibacterial ability than that of the HR Zn–3Cu alloy in relation to S. aureus . Overall, the HR Fe/Zn–3Cu composite can be anticipated to be a promising biodegradable implant material for bone-fixation applications. Statement of significance This work reports a new biodegradable Fe/Zn–3Cu composite fabricated by infiltration casting and followed by hot-rolling for biodegradable bone-fixation application. Our findings demonstrated that the hot-rolled (HR) Fe/Zn–3Cu composite exhibited an ultimate tensile strength of 269.1 MPa, a tensile yield strength of 210.3 MPa, and an elongation of 26.7%. HR Fe/Zn–3Cu composite showed a degradation rate of 227.6 µm/a, higher than HR Zn–3Cu alloy after immersion in Hanks’ solution for 30 d The diluted extracts of the HR Fe/Zn–3Cu composite exhibited a higher cell viability than HR Zn–3Cu alloy toward MC3T3-E1 cells. Furthermore, the HR Fe/Zn–3Cu composite showed significantly better antibacterial ability than the HR Zn–3Cu alloy toward S. aureus .
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高影响因子
Journal of Central South University
·
2024
·Vol. 31
·期 5
·1494-1506
·
IF 3.7
Xue Yu-xiao,Zhu De-qing,Pan Jian,You Zhi-xiong,Lyu Xue-wei
In this paper, sinter samples of limonitic nickel laterite were adopted for Fe-Cr-Ni alloy preparation at lower costs. Based on the thermodynamics analysis, smelting characteristics of sinter samples of S1 (4.84 wt% Cr 2 O 3 ) and S3 (7.72 wt% Cr 2 O 3 ) were revealed by the optimization of smelting process parameters. When smelting durations were kept at 60 min and 90 min for S1 and S3 and smelting temperature, coke dosage and slag basicity were maintained at 1600 °C, 20 wt% and 1.0, respectively, the qualified Fe-Cr-Ni alloys containing 84%–88 wt% Fe, 5.6%–9.3 wt% Cr and 1.55%–1.70 wt% Ni were prepared with the recovery rates of Fe, Cr and Ni of over 96%, 90% and 98%, respectively. Higher Cr 2 O 3 content of sinter leads to the prolongation of smelting duration, which is adverse to the reduction of coke ratio and the increase of stainless steel output. The comprehensive furnace burdens including Ni-bearing sinter and Cr-bearing pellets will be developed in the follow-up study for the more efficient preparation of high-Cr ferronickel.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bowen Lu,Ziqiang Han,Xinyu Zhi,Liqi Zhang
NiFe 2 O 4 exhibits excellent redox properties and is widely applied in catalytic reactions. However, rapid inactivation under reaction conditions limited its industrial applications. In this study, CeO 2 -NiFe 2 O 4 composite catalysts were synthesized, and the Reverse Water Gas Shift (RWGS) reaction was measured to reveal its CO 2 hydrogenation performance under a high-temperature condition. NiFe 2 O 4 catalysts got deactivated after being reduced to Fe-Ni alloy at 700 °C, decreasing the CO 2 conversion rate. CeO 2 addition can significantly improve its high-temperature activity, and 20CeO 2 -NiFe 2 O 4 exhibited the best catalytic activity (80.85 %, 700 °C). The CeO 2 -confined maintained Ni-Fe alloy with a relatively small crystal size and larger specific surface area, supporting more active sites for CO 2 hydrogenation. CeO 2 addition induced higher oxygen vacancy concentration, enhancing CO 2 activation and formates species formed on 20CeO 2 -NiFe 2 O 4 , resulting in higher CO 2 conversion activity. In addition, 20CeO 2 -NiFe 2 O 4 maintained its catalytic stability for 50 h at 700 °C. The CeO 2 confined enhanced the high-temperature stability of Fe-Ni alloy. CeO 2 and formed CeFeO 3 dispersed in 20CeO 2 -NiFe 2 O 4 inhibited excessive aggregation of Fe-Ni alloy, and CeO 2 inhibited carbon deposition on Fe-Ni alloy, improving Fe-Ni alloy’s reaction stability under RWGS reaction conditions. CeO 2 confined may give insight into improving metal stability under high-temperature and reductive conditions in heterogeneous catalysis.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 9
·096508
·
IF 3.9
Xingxing Liao,Zhaode Mu,Panke He,Yonghua Yuan,Jiaxu Zhou,Lijuan Bai
In this work, a new non-enzymatic sensor for the determination of glucose was constructed using Fe-doped NiMoO4 nanoparticles (NiFeMoO4). Hydrothermal and calcination techniques were successfully used to synthesis different proportion nanoparticles of Ni1−xFexMoO4 (x = 0, 0.01, 0.03, 0.05). A set of electrochemical measurements demonstrated that all of the Ni1−xFexMoO4 have electrocatalytic properties to glucose. Especially, Ni0.99Fe0.01MoO4 (x = 0.01) displayed the most excellent amperometric response to glucose in the range of 0.01∼13 mM with a limit of detection (LOD) of 0.29 μM (S/N = 3). This amperometric sensor also showed satisfactory anti-interference performance and stability. More significantly, the sensor's applicability was tested using a glucose assay in actual serum samples with acceptable results.
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高影响因子
CATALYSIS LETTERS
·
2024
·Vol. 154
·期 8
·4088-4095
·
IF 2.3
Li Ling,Yan Shasha,Wang Hui,Ge Xingbo
The oxygen evolution reaction (OER) plays a vital role in electrolytic water splitting. It is urgent to explore highly active non-precious metal OER catalysts. Herein, the etching combined with the electrodeposition was used to synthesize the efficient Ni–Fe/p-CoAl catalyst, which exhibits ideal OER performance. A low overpotential of 282 mV and 296 mV are needed to achieve the current density of 50 mA/cm 2 and 100 mA/cm 2 in 1 M KOH, respectively. Moreover, the as-prepared catalyst shows good durability with no detectable degradation during long-term operation. The enhanced OER performance can be attributed to the large electrochemical surface area and the strong interaction between Ni–Fe nanosheets and active substrate. Graphical Abstract Etching combined with the electrodeposition method was used to synthesize an efficient Ni–Fe/p-CoAl catalyst for OER.
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高影响因子
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