JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Senyang Wang,Bo Huang,Shu Zhao,Zhangyong Li,Yixin Kang,Xuan Wang,Ling Li
FeCo 2 O 4 @NiMoO 4 /NF composites were synthesized by two-step hydrothermal method. • The core-shell nanosheet structure offers abundant active sites and ion diffusion. • The electrode delivers a high surface capacitance of 5210 mF cm −2 at 1 mA cm −2 . • An asymmetric supercapacitor achieves an extended voltage window of 1.7 V. • FeCo 2 O 4 @NiMoO 4 /AC supercapacitor achieves excellent energy density of 0.27 mWh cm −2 . The development of binder-free electrodes is critical for advancing high-performance supercapacitors, yet achieving both high areal capacitance and long-term stability remains a challenge. Herein, the core-shell FeCo 2 O 4 @NiMoO 4 /NF (FCO@NMO/NF) composite material was synthesized on nickel foam by a simple two-step hydrothermal method as the positive electrode for asymmetric supercapacitors. The prepared electrode leverages the advantages of porous nanosheets' abundant reactive sites and multimetallic synergistic effects. Consequently, the FCO@NMO/NF electrode delivers an exceptional areal capacitance of 5210 mF cm −2 at 1 mA cm −2 , which is 4.5 times higher than that of the pristine FeCo 2 O 4 electrode. Furthermore, an assembled asymmetric supercapacitor (ASC) with FCO@NMO/NF and activated carbon electrode (AC/NF) achieves a wide voltage window of 1.7 V, a high energy density of 0.27 mWh cm −2 , and outstanding cycling stability with 97.4% capacitance retention after 6500 cycles. Overall, the FCO@NMO/NF is a promising binder-free electrode material for next-generation energy storage devices. Download: Download high-res image (223KB) Download: Download full-size image
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Yanchen Zhu,Kun Liu,Peng Fu,Linli Qin,Lulu Zhu,Wenyang Xu,Hao Ren,Huamin Zhai
The integration of photo-Fenton catalysis couple oxygen reduction reaction (ORR) has shown significant advantages in industrial water-pollution treatment. In this work, a ternary heterojunction catalyst (Ag@FeCo 2 O 4 /Defective-BiOBr, AFB) with rich oxygen vacancies (OVs) was developed by integrating defect engineering, Z-scheme heterojunction, and Ag surface plasmon for light/dark dual-mode pollutants degradation. A unique “three-channel” electron transfer mechanism was designed for the first time, enabling the enhanced electron migration dynamics. The density functional theory (DFT) theoretical calculation revealed that Fe/Co diatomic doping structure and OVs significantly reduced the H 2 O 2 activation energy, facilitating the radical formation. Under light irradiation, AFB exhibited efficient degradation (98.5 %, 40 min, pH = 3.0) of real-industrial pollutants driven by photo-Fenton degradation. Even in dark condition, AFB also showed the dark degradation capability, enabling 89.5 % degradation by Ag-catalyzed oxygen reduction reaction (ORR). Benefiting from this, AFB showed features of efficient degradation capability, wide applicability (light/dark dual-mode, pH = 3.0 ∼ 9.0), and full-day operation ability. Significantly, stability tests collectively indicated excellent stability in structure and environment resistance, as high as stable regeneration (over 90 % efficiency after five recycles), further supporting its potential in real system. This work provided a unique design and mechanistic insights of new material paradigm in sustainable AOP environment remediation, and supported for the self-adaptive response removal of challenging pollutions.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·53355-53369
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IF 5.8
Ding Chunsheng,Lei Jia,Cai Zhiyue,Gao Mengying,Zou Zhaozheng,Li Yuanfeng,Deng Jing
In this research, FeCo 2 O 4 nanomaterial was successfully synthesized by a typical sol–gel method and conducted as an effective agent for peroxymonosulfate (PMS) activation to eliminate antibiotics flurbiprofen (FLU), a strong nonsteroidal drug. FeCo 2 O 4 nanomaterial was characterized by XRD, TEM, SEM, and XPS. Various characterization results proved that FeCo 2 O 4 held stable spinel structure. The interfering factors including initial pH, PMS concentration, catalyst dosage, inorganic anions, and humic acid on FLU removal were also discussed. The conclusion was that the removal efficiency of FLU reached 98.2% within 120 min after adding FeCo 2 O 4 (0.4 g L −1 ) and PMS (3 mM). The optimal pH for FLU degradation was the initial pH of 6.5; too acidic or alkaline was not conductive to the degradation. The existence of HA and Cl − restrained the degradation of FLU, and HCO 3 − promoted the removal, while the influence of NO 3 − and SO 4 2− could not be considered. The radical scavenging experiment confirmed that • OH, O 2 •− , and SO 4 •− participated in FLU removal and SO 4 •− functioned a leading role. FeCo 2 O 4 showed high efficiency for PMS activation in pH range of 3.0 to 10.0. After the fourth cycle operation, the FLU removal rate exceeded 76.9%, and the Co leaching rate was low during the catalytic reaction. This study shows that FeCo 2 O 4 nanomaterial is an efficient and environment-friendly catalyst, which can be applied for PMS activation to remove organic pollutants in water.
研究领域:
环境科学
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化学
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材料科学
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水处理
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Daming Yang,Ji Qi,Guiru Sun,Tong Wu,Rui Gao,Ze Gao,Hang Xu,Wei Lu,Ming Feng
Lithium‑oxygen battery (LOB) has attracted great interest due to its ultra-high theoretical specific capacity. However, the practical application of the LOB is obstructed by the high kinetic barriers and large overpotentials. Hence, a novel magnetic field assisted LOB (MF-LOB) is developed with ferromagnetic FeCo 2 O 4 nanowires as catalyst that can improve the ORR and OER kinetics through the application of a moderate magnetic field. The FeCo 2 O 4 nanowires are magnetized into nanomagnets with high spin polarization under a magnetic field, which is beneficial to the adsorption of O 2 -intermediates and transfer of electrons. Equally, the MHD effect contributes to the mass transport and diffusion including O 2 and Li + . The generation and oxidation of Li 2 O 2 are promoted for the MF-LOB based on FeCo 2 O 4 nanowires due to the high spin polarization and MHD effect. The MF-LOB based on FeCo 2 O 4 nanowires shows a lower overpotential of 0.89 V and longer cycle life of 150 cycles than those (1.22 V and 53 cycles) of the LOB without the magnetic field. This unique in-situ magnetic enhancement strategy for optimizing catalyst performance provides a new idea for the development of high-performance external field assisted LOBs.
研究领域:
电化学
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材料科学
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储能技术
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纳米技术
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应用物理学
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高影响因子
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