ACS Applied Materials & Interfaces
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2025
·
IF 8.2
Zizai Ma,Zihao Wan,Shuaili Zhao,Jinping Li,Jianping Du,Xiaoguang Wang
Bimetallic single-atom catalysts have garnered considerable interest in the field of the oxygen reduction reaction due to their unique electronic configurations and synergistic catalytic effects. However, precise modulation of d-orbital electron distribution at single-atom sites and comprehensive elucidation of the underlying catalytic mechanisms continue to present significant challenges. Herein, the FeCo(mlm)–N–C catalyst, integrating atomically dispersed Fe–Co dual-metal sites and Fe3C nanoparticles, was synthesized by using an encapsulation and ligand exchange strategy. Comprehensive analyses and theoretical simulations reveal that the incorporation of Fe3C nanoparticles induces significant d-orbital electron delocalization at the Fe active sites. This tailored electronic configuration effectively modulates Fe d–O p hybridization between the Fe active sites and adsorbed OH*. Consequently, it optimizes the occupancies of bonding and antibonding orbitals, thereby accelerating OH* desorption. This mechanism enables FeCo(mlm)–N–C to exhibit excellent catalytic performance and remarkable stability in both acidic and alkaline environments, while demonstrating superior activity in zinc-air batteries and proton exchange membrane fuel cells. This work not only presents a highly efficient non-noble metal electrocatalyst but also provides valuable insights into the rational development of advanced transition metal–nitrogen–carbon catalysts for energy-related applications.
研究领域:
电化学
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催化
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材料科学
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纳米技术
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能量转换
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 6
·2454-2459
·
IF 6.233
Baoru Bian,Weixing Xia,Juan Du,Jian Zhang,J. Ping Liu,Zhaohui Guo,Aru Yan
By using Fe(CO)x-OAm (oleylamine, x < 5) as the Fe precursor to slow down the formation rate of FePt nanoparticles (NPs), a time dependence of the NPs' nucleation and growth process was observed by transmission electron microscopy (TEM). The complexing temperature of OAm and Fe(CO)5 at which Fe(CO)x-OAm was formed has a strong influence on the nucleation rate and growth process of the NPs. TEM analyses indicated that the NPs with isotropic shape were single crystalline throughout the synthesis and were formed by a diffusion-controlled Ostwald-ripening (OR) growth mechanism. The nanorod particles were first formed via joining of arbitrarily oriented single crystals and the two crystals formed a uniform particle afterwards, as described by the oriented-attachment (OA) mechanism. The ratio of OAm to Fe(CO)5 used in the preparation of Fe(CO)x-OAm has a significant influence on the growth process, and subsequently the shape, size and size distribution of the FePt NPs. By adjusting the ratio and its complexing temperature, single-crystal FePt NPs with controllable size and isotropic shape were obtained. The insight into the exploration of the specific roles of the reaction conditions and the formation mechanisms provided important information for controlling the morphology of the nanoparticles.
研究领域:
材料科学
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纳米技术
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化学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2025
·
IF 6.2
Honghui Yan,Xiangyu Wang,Yi Zhu,Yuding Zhu,Ruiqi Xin,Shunze Zhang,Meiling Chen,Song Li,Jeonghun Kim,Wenkai Zhu
Free formaldehyde poses significant health risks as a prevalent indoor organic pollutant, driving demand for efficient and renewable adsorption solutions. While Fe-CoPBA bimetallic metal-organic frameworks show potential for formaldehyde removal, their powdered crystalline form presents practical limitations including poor recyclability and secondary contamination. Herein, we developed a novel Fe-CoPBA@bamboo composite (Fe-Co@B) through solution blending, leveraging bamboo's inherent micro-nano hierarchical pores for Fe-CoPBA encapsulation. The Fe-CoPBA nanoparticles (NPs) successfully integrated into delignified bamboo conduits through hydroxyl-mediated ligand bonding and van der Waals interactions. Formaldehyde removal tests demonstrated Fe-Co@B's dual adsorption-catalysis mechanism effectively eliminates indoor free formaldehyde. The Fe-Co@B maintained stable removal efficiency for formaldehyde through 10 regeneration cycles while preserving structural integrity. Furthermore, the Fe-Co@B exhibits high reusability along with moisture and deformation resistance. Therefore, this work contributes to solving the current problem of indoor free formaldehyde pollution and provides research ideas for the development of new functional bamboo-based products.
研究领域:
环境科学
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材料工程
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纳米技术
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室内空气质量
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可持续化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Bingyang Liu,Yu Wang,Xue Hao,Xuetao Liang,Qi Yang
In this work, a carbon-based catalyst Fe/Co@C with MOF as a self-sacrificing template was prepared by high-temperature roasting of FeCo-MIL101, which was applied to activate PMS for the degradation of chlorotriazine herbicides (ATZ and SIM) showing excellent performance. Characterization analysis revealed that Fe/Co@C possesses a certain graphene structure and has a saturation magnetization rate of 0.87 emu/g, which can be separated from the solution easily and quickly. The degradation of ATZ and SIM was enhanced by introducing chloride ions into the system, and 100 mmol/L Cl - could lead to the complete removal of ATZ and SIM in 6 min, while improving the interfacial electron transfer of Fe/Co@C/PMS. In combination with quenching experiments, ESR test results and DFT calculations, two important roles of chlorine radicals in the reaction are proposed: (1) direct electron transfer and (2) indirect promotion of 1 O 2 generation through the production of HOCl. In addition, the testing of the influencing factors of the catalyst in the system (catalyst dosing, PMS dosing, pH, temperature), the testing of coexisting anions in the aqueous matrix, and the reusability all showed satisfactory performance. Finally, the degradation mechanisms of ATZ and SIM were proposed in combination with GC–MS determination of contaminant intermediates and analysis of their toxicity.
研究领域:
环境科学
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催化
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水处理
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化学工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Jun Chen,Boding Zhang,Bingxing Wang,Chengxing Cui,Songlin Wang,Jichao Wang,Wenlong Zhang
With high toxicity, carcinogenicity and teratogenicity, quinoline has been threatening human health and ecological environment. Herein, Fe-Co-Ni-P/g-C 3 N 4 particles are developed as electrochemical reactors to form a three-dimensional catalytic particle electrode system (3D-CPE) for efficient removal of quinoline from wastewater by electro-Fenton (EF) oxidation process. with reaction time of 30 min, the particles dosage of 50 g/L, pH of 3, conductivity of 11.5 ms/cm, and current density of 37.04 mA/cm 2 , the chemical oxygen demand (COD) removal rate can up to 90.95%. In addition, electron paramagnetic response (EPR) and radical scavenging tests are performed to determine the hydroxyl radicals of electrochemical processes produced. The degradation products are analyzed by high performance liquid chromatography-mass spectrometry (HPLC-MS). Finally, through theoretical calculation and analysis of degradation products, a reasonable degradation mechanism is proposed.
研究领域:
环境科学
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化学工程
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水处理
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Guoquan Liu,Yong Zhu,Hua Gao,Suxian Xu,Zhibing Wen,Licheng Sun,Fei Li
Developing efficient photocatalysts for water oxidation is among the central challenges of solar energy conversion. Here, we report semiconductor–molecular photocatalysts by integration of heteronuclear bimetallic polyphthalocyanine (PPc) catalysts with particulate bismuth vanadate (BiVO4) as the photosensitizer. Their photocatalytic activity for water oxidation was modulated by tuning the Fe/Co ratio of polyphthalocyanines. At an optimal Fe/Co ratio of 3:1, the resulting Fe3CoPPc-BiVO4 hybrid exhibits an excellent oxygen evolution rate of 4557 μmol g–1 h–1 in the presence of iodate under visible light irradiation, which is nearly two orders of magnitude greater than that of pristine BiVO4 and superior to those of the corresponding homometallic counterparts. Both experimental and theoretical methods suggest that the presence of a large population of high-valent Fe/Co molecular species due to the favorable interfacial charge transfer and upshift of the d-band centers of metal sites toward Fermi level lead to a lower energy barrier for the O–O bond formation and eventually promote the oxidation of water.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Lan Liu,Kai Xie,Yuheng Wang,Haoran Wang,Jinyi Wang,Yuting Zhuang,Yue Zhang
The efficient and accurate separation of immunoglobulin G (IgG) plays a vital role for disease diagnosis and therapy, but it is always hampered by the huge geometric size and complex structure of IgG. In this work, an amorphous Fe/Co bimetallic organic framework (denoted as PMOF-Fe/Co) is fabricated for IgG separation, with octa-carboxyl polyhedral oligomeric silsesquioxane (OCPOSS) as modulator for the first time. Benefiting from the rigid nanostructure and competitive coordination of OCPOSS, the aperture of PMOF-Fe/Co is enlarged to ∼20 nm along with the generation of enormous structural defects, which enables the accommodation of protein species with high molecular weights and large sizes. OCPOSS is also found exerting a positive impact on mediating the specific recognition and adsorption ability of PMOF-Fe/Co towards IgG through metal affinity, hydrophilic and hydrophobic interactions. Consequently, the multimode and multivalent affinity of PMOF-Fe/Co gives rise to an extraordinary adsorption capacity (2691.7 mg g −1 ) and satisfactory practical application performance. This study is convinced to provide a simple avenue for the efficient separation of specific large-sized proteins, as well as the engineering of abiotic affinity reagents with compositional and architectural complexity.
研究领域:
生物化学
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材料科学
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纳米技术
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分析化学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
TRANSITION METAL CHEMISTRY
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2025
·
IF 1.7
Wang Yuqin,He Lizi,Han Ning,Li Lishuang,Wang Meiyang
It is of great practical significance to explore and prepare cheap, high-performance, and stable catalysts for oxygen reduction reaction (ORR), but it is still in progress at present. Herein, a straightforward evaporation–pyrolysis strategy is designed for the preparation of 3D porous electrocatalysts (denoted as \(\textrm{Fe}-\textrm{Co}-\textrm{NC}\) , which represented carbonization products at °C) made of carbon nanoparticles combined with metallic Fe-Co-doped N-enriched bridged carbon nanotube by carbonization of a pristine ZIF8 as highly efficient and durable ORR electrocatalysts. The obtained Fe–Co–NC structure possesses 3D open porous texture, abundant active sites, desired nitrogen bonding type, and high specific surface area, providing them with excellent ORR activity. The optimal performing \(\textrm{Fe}-\textrm{Co}-\textrm{NC}\) catalyst presents an outstanding ORR performance in terms of a high onset potential ( \(\textrm{E}_{\text{ onset } }\) ) of 0.96 V (vs. RHE) and half-wave potential ( \(\textrm{E}_{1 / 2}\) ) of 0.86 V (vs. RHE), respectively, possible to rival those of the commercially available \(\textrm{Pt} / \textrm{C}\) in an alkaline electrolyte solution. Besides, the \(\textrm{Fe}-\textrm{Co}-\textrm{NC}\) catalyst manifests better stability than those of commercially available \(\textrm{Pt} / \textrm{C}\) , which is of importance for the optimization and characterization of novel electrocatalysts originated from non-precious metals.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-11
·
IF 5.3
Tang Jiazhen,Chen Jiawei,Xu Ruijie,Xu Junhui,Peng Xiaolun,Wang Yazhen
An electrochemical sensor is presented for the detection of the chloramphenicol (CAP) based on a bimetallic MIL-101(Fe/Co) MOF electrocatalyst. The MIL-101(Fe/Co) was prepared by utilizing mixed-valence Fe (III) and Co (II) as metal nodes and terephthalic acid as ligands with a simple hydrothermal method and characterized by SEM, TEM, XRD, FTIR, and XPS. Electrochemical measurements such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) showed that bimetallic MIL-101(Fe/Co) had the faster electron transfer, larger electroactive area, and higher electrocatalytic activity compared with their monometallic counterparts due to the strong synergistic effect between bimetals. Inspired by these results, the MIL-101(Fe/Co)-based sensor was used to detect CAP. Some experiment parameters of pH, Fe and Co molar ratio, MIL-101(Fe/Co) volume, and DPV quiet time were optimized. The direct reduction mechanism of CAP was verified to involve four electrons and four protons process. Finally, the sensitive and selective CAP detection in the concentration range 1 to 200 μM with a detection limit of 0.3 μM was realized by the proposed sensor. The satisfactory recoveries in tap water and lake water indicated the practicability of the proposed electrochemical sensor. It is expected that this work may open up a paradigm for the preparation of MOF-based electrode modifiers with desired electrocatalytic performance for environmental pollution monitoring.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Guoru Li,Xiaobo He,Fengxiang Yin,Biaohua Chen,Huaqiang Yin
The development of highly efficient electrocatalysts with low cost for oxygen reduction reaction (ORR) is urgently required for metal-air batteries and fuel cells. In this work, Fe Co/MIL-101(Cr) with various molar ratios of Fe/Co as hybrid catalysts was prepared by a facile and mild impregnation method. MIL-101(Cr) increased the specific surface areas of the hybrid catalysts, thus improving the dispersion of Fe and Co species at their surfaces. The effects of Fe and Co species on ORR activity of the hybrid catalysts were investigated. It is found that the synergistic effects between the well-dispersed Fe and Co species contribute mainly to ORR activity. More specifically, Fe species exert a partial-charge-transfer-activation effect on Co ones, which reduces the charge transfer resistance and thus improves the catalytic activity . As a result, Fe Co/MIL-101(Cr) showed the excellent ORR activity, in which Co 50 Fe 50 /MIL-101(Cr) exhibited the superior ORR activity to the other prepared hybrid catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 46
·19700-19707
·
IF 2.7
Nan Zhou,Fanyi Kong,Ya Tang
The traditional impregnation method for preparing supported catalysts often faces challenges such as particle agglomeration and weak support–metal interactions. This study focuses on utilizing the exsolution method to prepare Fe, Co, and Ni supported catalysts from ABO3-type perovskites, aiming to overcome these challenges. Experimental results show that LaBO3 perovskites with different B site metals (B = Fe, Co, Ni) exhibit different metal exsolution kinetics in the ammonia synthesis reaction. LaNiO3 demonstrates an initial activity of 782.2 μmol g−1 h−1 within the first 2 hours of the reaction, maintaining stability beyond 80 hours. In contrast, LaFeO3 and LaCoO3 exhibit prolonged initiation periods for the metal exsolution process, reaching activities of 7873.8 μmol g−1 h−1 and 8046.7 μmol g−1 h−1, respectively, after approximately 80 hours. The degree of B-site metal exsolution was investigated using X-ray absorption fine structure (XAFS) and Rietveld refinement of XRD data, revealing exsolution rates of 72.03%, 69.3%, and 86.3% for Fe, Co, and Ni, respectively, after 80 hours of reaction. This study not only introduces the exsolution method for ammonia synthesis but also empirically validates several computational predictions, thereby supporting both theoretical and practical research.
研究领域:
催化
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材料科学
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化学工程
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无机化学
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DOI
高影响因子
BIOELECTROCHEMISTRY
·
2024
·
IF 4.8
Li Zhang,Ming Yin,Xiuxia Wei,Yiwei Sun,Yuting Luo,Huaqing Lin,Ruxin Shu,Dongpo Xu
Fe-Co@CNF was synthesized by electrospinning technology, and AuNPs was loaded onto Fe-Co@CNF by in-situ reduction to obtain Fe-Co@CNF@AuNPs composite material, which was used as the working electrode based on Au-S bond cooperation. The tetracycline electrochemical sensing interface Fe-Co@CNF@AuNPs@Apt was constructed by connecting mercaptoylated tetracycline (TC) aptamers on Fe-Co@CNF@AuNPs surface. The morphology and composition of Fe-Co@CNF@AuNPs composites were characterized by SEM, TEM, EDS, XRD and XPS, and the electrochemical properties of tetracycline were evaluated by CV and DPV. The results showed that the addition of Fe and Co did not destroy the structure of the original carbon nanofibers, and their synergistic effect enhanced the electrocatalytic performance, effective electrode area and electron transfer ability of carbon nanofibers. AuNPs are evenly distributed over the fibers, which effectively improves the electrical conductivity of the material. Under the optimal conditions, the theoretical detection limit of tetracycline was 0.213 nM, and the linear detection range was 5.12–10 mM, which could successfully detect tetracycline in milk.
研究领域:
分析化学
·
纳米材料科学
·
环境监测
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产品关联
DOI
PubMed
高影响因子
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