NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.5
Jian Yang,Wenke Liu,Yiwen Zeng,Yunxiao Wen,Shaoyi Li,Yang Li,Ximei Fan
This study presents a novel strategy for synthesizing bifunctional oxygen electrocatalysts by embedding CoFe alloy nanoparticles within N-doped hierarchically porous carbon (FeCo@NC) via spatial and chemical confinement effects. Utilizing the mixture of ZIF-67 and iron tetranitrophthalocyanine (FePc-NH2) as precursors, the metal atoms migration and agglomeration are effectively restricted during pyrolysis. By optimizing the Fe/Co atomic ratio, the Fe0.46Co1@NC catalyst achieves exceptional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities, evidenced by a high half-wave potential (E1/2 = 0.86 V vs. RHE), a low overpotential gap (ΔE = 0.74 V), and a limiting current density of 5.8 mA cm-2. Structural characterization confirms uniform dispersion of ∼10–20 nm FeCo alloy nanoparticles encapsulated by graphitic carbon layers, alongside abundant pyridinic/graphitic-N sites and hierarchical porosity (BET: 379 m2 g-1). When assembled in Zn-air batteries, Fe0.46Co1@NC delivers a high open-circuit voltage (1.46 V), a specific capacity of 781 mAh g-1, and a peak power density of 168.4 mW cm-2, which outperforms the Pt/C+RuO₂ benchmarks. This work highlights the synergy between confined alloy nanoparticles and N-doped carbon matrices for advanced energy conversion
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Pengyao Guo,Yuan Qin,Yujie Fang,Lei Ding
This study presents the rational design of a magnetically recoverable CoFe 2 O 4 /BiVO 4 @g-C 3 N 4 (CFO/BVO@CN) ternary heterojunction for highly efficient levofloxacin (LVFX) degradation via peroxymonosulfate (PMS) activation under visible light. The key innovation lies in the synergistic integration of a unique charge transfer pathway with interfacial M-N (M = Co, Fe, Bi, V) chemical bonding, as unequivocally evidenced by XPS. This atomic-level interfacial engineering creates efficient electron channels that not only promote the spatial separation of photogenerated carriers but also dramatically accelerate the dual redox cycles of metal species (Co 2+ /Co 3+ , Fe 2+ /Fe 3+ ).Crucially, the V 4+ /V 5+ pair functions as an efficient electron shuttle, facilitating the rapid regeneration of PMS-active Co 2+ and Fe 2+ sites and sustaining a high-efficiency catalytic process. Consequently, the optimized system achieves an exceptional LVFX removal rate of 98.8% within 30 min, driven predominantly by singlet oxygen ( 1 O₂) and superoxide radicals ( • O 2 − ). The catalyst demonstrates robust stability over multiple cycles, facile magnetic separation, and effective detoxification of LVFX. This work provides a novel paradigm for developing multifunctional photocatalytic systems by marrying heterojunction engineering with atomic-level interface modulation for sustainable water purification.
研究领域:
环境科学
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材料化学
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光催化
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水净化
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高级氧化技术
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高影响因子
ELECTROCHIMICA ACTA
·
2021
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IF 6.901
Cuizhu Ye,Xingguang Chen,Dong Zhang,Junjun Xu,Huiting Xi,Tiantian Wu,Danwen Deng,Chunhong Xiong,Jinsheng Zhang,Ganhui Huang
Coated with polypyrrole (Ppy)-based molecularly imprinted polymer (MIP), 3D CoFe-metal organic frameworks (CoFe-MOFs) with gold nanoparticles (AuNPs) was developed for electrochemical trace detection of norfloxacin (NOR). On one hand, the trace detection of NOR was realized with MIP/CoFe-MOFs/AuNPs/Glassy carbon electrode (GCE). The effective surface area of the imprinted cavities capable of identifying NOR on MIP/CoFe-MOFs/AuNPs/GCE increased to 0.1058 cm 2 after 3D CoFe-MOFs/AuNPs was modified, which indicates that CoFe-MOFs/AuNPs could generate more imprinted cavities, thus contributing to a lower limit of detection (LOD) of 0.131 pmol L −1 (S/N = 3) with a wider linear range (5–100, 100–1000 and 1000–6000 pmol L −1 ). On the other hand, the recognition reaction to NOR by MIP/CoFe-MOFs/AuNPs/GCE is an irreversible electrochemical oxidation reaction involving an electron and a proton, controlled by a mixed adsorption-diffusion mechanism. Rapid and precise detection of NOR in prescription (norfloxacin capsules with the specification of 0.1 g) and pure milk with the recovery rates between 97.04 and 110.2% and the relative standard deviations (RSD) were less than 5.7%. The measured results by MIP/CoFe-MOFs/AuNPs/GCE were close to the commercial norfloxacin enzyme-linked immunosorbent assay (ELISA) kit, demonstrates its high potential to NOR trace detection in environmental and animal foods.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Long Huang,Linzhi Zuo,Zeyang He,Beibei Xiao,Hu Zhou,Shichuan Su,Yang Li,Ting Bian,Aihua Yuan
Rational incorporating transition metal into porous heteroatom-doped carbon is intensively investigated as an effective strategy to achieve high-performance and bifunctional requirements. Herein, we fabricated the hollow composite that CoFe alloy nanoparticles decorated on the tubular N-doped carbon (denoted as T-CoFe/NC) by soft-templating strategy. In order to effectively incorporate the CoFe alloy into nitrogen doped hollow carbon matrix, g-C 3 N 4 nanotubes were selected as the template to attain high contents of nitrogen doping for tubular carbon matrix. Meanwhile, the coordination effect between tannic acid and metal ions is utilized to limit the metal agglomeration in the process of pyrolysis. Consequently, the resultant catalyst shows an outstanding ORR activity with the half-wave potential of 0.86 V and outstanding stability with only a 2 mV decay after 10,000 cycles. T-CoFe/NC also displays comparable overpotential to the RuO 2 at 10 mA cm −2 . The high bifunctional electrocatalytic activity is attributed to the unique tubular structure and the combination of Co with Fe can optimize the interaction between the oxygenic species and metal surfaces, enhancing the catalytic activity. And T-CoFe/NC based zinc-air battery exhibits excellent power density, large capacity and good cycling stability.
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ACS Applied Energy Materials
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2018
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IF 0
Linghao He,Bingbing Cui,Bin Hu,Jiameng Liu,Kuan Tian,Minghua Wang,Yingpan Song,Shaoming Fang,Zhihong Zhang,Qiaojuan Jia
Electrocatalytic water splitting requires the development of attractive and earth-abundant catalysts. In this work, a novel four-part electrocatalyst of mesoporous cobalt/iron phosphorus–selenide nanocomposite (CoFe–Se–P) was derived from hollow CoFe Prussian blue analogues (CoFe-PBA) and combined by phosphatization and selenylation. This novel electrocatalyst displays an efficient and durable bifunctional catalysis performance for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In view of strong electron interaction among Co, Fe, Se, and P, this four-part electrocatalyst exhibits a lower onset potential of −35.9 mV and an overpotential of −172.5 mV at a current density of 10 mA cm–2 in acidic solution for HER. In alkaline solution, the onset potential and the overpotential are maintained at approximately −33 and −183.1 mV, respectively. Moreover, the proposed CoFe–Se–P catalyst possesses superior OER performance with a lower onset potential of 1.07 V and overpotential of 1.44 V at a current density of 10 mA cm–2 in 0.1 M KOH solution. The versatile electrocatalyst can catalyze water splitting in a two-electrode system at a potential of 1.59 V. The proposed strategy offers insight into the rational design and development of promising electrode materials with distinct architectures for electrochemical energy storage and conversion.
研究领域:
材料科学
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电化学
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能源转换与储存
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JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Guoxin Ding,Chenfeng Sun,Jun Liu,Yuexiang Hu
The self−assembly among different two−dimensional materials could effectively improve the self−stacking effect and promote repeated reflection and refraction of incident electromagnetic wave (EMW). The polarization effect caused by the heterogeneous contact also helps the attenuation of EMW. In this study, the in−situ hydrothermal approach was used to effectively fabricate petal−like CoFe−layered double hydroxide sheets (CoFe−LDH) grown on reduced graphene oxide (RGO) functionalized by 4,4−diaminodiphenyl methane (DDM). The microwave absorption properties of DDM−functionalized RGO/CoFe−layered double hydroxide composites (DDM−RGO/LDH) were investigated. When the loading of DDM−RGO is 40.0 mg, the reflection loss reached −60.0 dB at 5.28 GHz, resulting in great EMW absorption performance. The effective absorption bandwidth at 2.00 mm is 5.28 GHz. The results show that DDM−RGO/LDH has a wide microwave absorption bandwidth and strong absorption capability, thus could be applied as an advanced EMW absorbing material.
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ChemSusChem
·
2023
·Vol. 16
·期 12
·e202300207
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IF 8.4
Dewei Wang,Jiaqi Sun,Long Chen
Graphical NH 4 + storage : Structural reconstructed cobalt-iron layered double hydroxides featuring copious structure defects are reported as a high-capacity cathode for NH 4 + storage. The resulting sample can not only deliver a large reversible capacity but also act as the cathode for construction of ammonium-ion hybrid supercapacitors. Exploration of high-performance aqueous ammonium-ions hybrid supercapacitor has attracted tremendous research attention recently. Herein, structural reconstructed cobalt-iron layered double hydroxides (SR-CoFe LDHs) featuring copious structure defects (i. e., oxygen-vacancies, M−O bonds, MOO − bonds, coexistence of Co 2+ /Co 3+ and Fe 2+ /Fe 3+ ) are reported as a high-capacity cathode for NH 4 + storage. The resulting SR-CoFe LDHs can deliver a reversible capacity of 167.9 mAh g −1 at 0.5 A g −1 , which is 3.3 folds higher than that of pristine CoFe-LDHs. Ex-situ experimental results and theoretical studies denote that the presence of structural defects in the CoFe-LDHs can lower the NH 4 + adsorption energy and induced electron delocalization to enhance the electrical conductivity, rendering the CoFe-LDHs exhibits excellent performance for NH 4 + storage. As a proof of concept, ammonium-ion hybrid supercapacitor has been assembled with CoFe-LDHs as the cathode and hierarchical carbon as the anode, which can deliver a large specific capacitance of 238.3 F g −1 , long cycle stability over 10000 cycles, and high energy density of 66.2 Wh kg −1 within a wide working voltage of 2 V. Overall, this work offers some insights into the design of high capacity cathode for aqueous NH 4 + storage and also illustrates the construction of aqueous hybrid devices with NH 4 + as the charge carrier.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jun Liu,Zhou Peng Li,Bin Hong Liu
We report our facile and efficient approach for synthesizing Co-Fe alloy based oxygen reduction reaction (ORR) catalysts, in which alloy nanoparticles are encapsulated in nitrogen-doped carbon nanostructures . The catalysts with high hierarchical porosities are fabricated at an appropriate temperature of 775 °C without a further acid leaching treatment after pyrolysis due to the use of ZnO nanoparticles as auto-removable templates. Co/Fe atomic ratio is found to greatly influence the ORR catalytic activity. The catalyst with Co/Fe = 1 exhibits the best catalytic performance by showing an ORR onset potential of 0.99 V and a half-wave potential of 0.87 V (vs. RHE) in 0.1 M KOH, as well as 0.98 V and 0.83 V (vs. RHE) in 0.5 M H 2 SO 4 , better than or approaching the performance presented by a commercial 28.6 wt% Pt/C catalyst. The Zn-air battery using the synthesized CoFe@N-C catalyst delivers a higher power density at ambient conditions by air-breathing than the one using the 28.6 wt% Pt/C catalyst. Relatively higher atomic concentrations of both Fe and Co as well as more graphitic nitrogen in the surface of CoFe@N-C detected by X-ray photoelectron spectroscopy (XPS) may account for its excellent ORR catalytic activities both in alkaline and acidic environments.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Tianyao Shen,Yi Yang,Haihe Yu,Peng Wang,Peng Xu,Jianhua Qu,Guangshan Zhang
Coal is the primary energy and consumption accounts for a higher proportion of fossil fuels, but its combustion product (fly ash) is a hazardous industrial solid waste (ISW). To alleviate its environmental problem and reuse waste, an appropriate disposal method for fly ash was proposed, which is using fly ash to construct the ceramsite as a catalyst carrier. To improve the catalysis property of the composite, layer double oxides (LDO) was doped into the lightweight ceramsite (CoFe-LDO/FAC) with dielectric barrier discharge plasma (DBDP) catalysis activity. In addition, following the mindset of a “waste-to-waste” strategy, apply the composite ceramsite enhancing the diuron-containing (DUR) water purification in a DBDP self-Fenton-like system, creatively using one stone kills two birds. The porous structure endows the CoFe-LDO/FAC possessed water adsorption ability, assisting oxidants and contaminants diffusion with water inside CoFe-LDO/FAC. More than 95 % of DUR could be removed within 10 min, and the DBDP + CoFe-LDO/FAC performed the properties of stability as evidenced by low metal ion leaching in the eight times recycle. During the catalysis process, CoFe-LDO/FAC promotes the dominant reactive species ( 1 O 2 and • OH) yield by the valence cycle of Fe 2+ /Fe 3+ and Co 2+ /Co 3+ in DUR decomposition. Abundant oxygen vacancy remedies the electron consumption and maintains the surface charge balance. This work provides a novel application of fly ash and LDO in water treatment and is helpful in ISW disposal.
研究领域:
环境科学
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材料科学
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MOLECULES
·
2025
·Vol. 30
·期 11
·2343
·
IF 4.6
Xinyue Li,Yahui Song,Yiming Huang,Jihui Zhang,Siyu Wu,Wentao Zhang,Jin Wang,Xian Zhang
MoS2has emerged as a highly promising catalyst for the hydrogen evolution reaction (HER) owing to its exceptional catalytic properties. However, there is a pressing need to further enhance its reactivity and integrate oxygen evolution reaction (OER) capabilities to facilitate its industrial implementation. In this context, a dual-metal doping approach presents a straightforward and effective strategy to achieve superior catalytic performance. Systematic characterization and electrochemical evaluations reveal that the synergistic effects of Co and Fe doping significantly enhance both HER and OER activities, demonstrating remarkable potential for practical applications in energy conversion and storage systems. The unique flower-like architecture of the material endows it with a substantially enlarged surface area, which significantly increases the exposure of active sites and facilitates enhanced catalytic activity. Specifically, it achieves the low overpotentials of −127 and 292 mV at 10 mA cm−2for HER and OER in alkaline media, respectively, and demonstrates excellent stability over a 10 h test. This research provides valuable insights into the development of advanced materials capable of efficiently performing both HER and OER processes, paving the way for potential applications in sustainable energy technologies.
研究领域:
材料科学
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电催化
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能源转换与存储
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PubMed
高影响因子
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Jing Zhang,Zhi Song,Yao Wei,Xiaoyu Li,Xingyao Li,Yu Hua,Qingguo Ren,Xiaolin Lan,Yi Hou,Lixi Wang
The development of high-performance microwave absorbers with strong absorption intensity, broad absorption bandwidth, and thin matching thickness remains a focal point in the field of electromagnetic (EM) attenuation materials. The synergistic design and construction of microstructures based on multiple polarization and loss mechanisms represent an effective approach to achieve this objective. Metal–organic frameworks (MOFs) inherently possess both magnetic and dielectric capabilities, making them excellent templates for high-performance microwave absorbers. However, single-component MOF-derived absorbers still suffer from insufficient absorption efficiency and a narrow effective bandwidth. Herein, a 0D/1D composite optimization strategy combining both component design and microstructure engineering is proposed to enhance EM attenuation in MOF-derived absorbers. The design features a cubic dual-phase CoFe alloy to serve as a magnetic loss framework. Meanwhile, the in situ grown CNTs endow the nanocomposite with substantial conductive loss, as well as the enhancement of interfacial polarization and dipole polarization. The resultant CoFe@CNTs nanocomposite achieves a minimal reflection loss of −49.63 dB at 16.88 GHz (1.5 mm thickness) and 6.32 GHz EAB at 1.71 mm. Compared to single-component Co nanoparticles, the superior absorption performance with lower RL, wider bandwidth, and thinner thickness makes the CoFe@CNTs nanocomposite an ideal highly effective EM absorption candidate.
研究领域:
材料科学
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电磁学
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纳米技术
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微波工程
·
复合材料
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Junjun Lv,Panpan Liu,Rushuo Li,Linmeng Wang,Kaiyue Zhang,Peiyun Zhou,Xiubing Huang,Ge Wang
A series of self-supported electrocatalysts composed of tri-metallic CoFeV-LDHs generated on conductive carbon cloth (denoted as CoFeV@CC) have been constructed. The specific interaction among Co, Fe and V is systematically revealed via tuning the molar ratios of M 2+ :M 3+ and Fe 3+ :V 3+ in these tri-metallic LDHs. Finally, the optimal synergistic effect is reached when the molar ratios of M 2+ :M 3+ and Fe 3+ :V 3+ are respectively 4:1 and 1:1, resulting in the product named Co 8 FeV@CC, which displays the best overall OER and HER performance. Only rather low overpotentials of 235 and 182 mV are required to attain the current density of 100 mA cm −2 with a Faradaic efficiency of nearly 100 % for OER and HER, respectively. Co 8 FeV@CC can thus be applied as both an anode and cathode in the symmetrical two-electrode and possesses a current density of 100 mA cm −2 at the cell voltage of 1.65 V, and further demonstrates ultra-high stability for 100 h.
研究领域:
材料科学
·
电化学
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