JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Mohamedazeem M. Mohideen,P. Chinnappan Santhosh,Adiyodi Veettil Radhamani,Ce Wang,Ping Hu,Balachandran Subramanian,Seeram Ramakrishna,Yong Liu
Designing efficient, sustainable, and cost–effective electrocatalysts for oxygen reduction (ORR) and oxygen evolution (OER) reactions is essential for advancing fuel cells and metal–air batteries as clean energy technologies. Despite significant progress in developing non–precious electrocatalysts, the nature of their active sites and interface chemistry remains unclear due to the complexity of the reaction mechanisms. To address these challenges, this study presents a Co–MOF/MXene hybrid electrocatalyst engineered to optimize synergy between dual–metal active sites, achieving high bifunctional activity for both ORR and OER. Notably, our comparative analysis provides clear experimental evidence that sulfur doping disrupts this balance in the reported catalyst. Structural analysis reveals that sulfur substitutes for carbon atoms within the framework, altering the local coordination environment and reducing catalytic performance, contrary to the common assumption that heteroatom doping is universally beneficial. The sulfur–free Co–MOF/MX–1 catalyst exhibits a high ORR onset/half–wave potential of 0.90/0.81 V (vs. RHE), low hydrogen peroxide yield (2.95 %), 90 % current retention, and an ultralow bifunctional gap (ΔE ORR–OER = 0.78 V). We attribute this superior performance to the interplay of Co–N₃–Ti₃C and Ti N active sites, which synergistically optimize oxygen adsorption and electron transfer, aligning with the metaphorical Janus principle of functional balance. This work challenges prevailing views on heteroatom doping and establishes new design principles for non–precious bifunctional electrocatalysts in fuel cells and metal–batteries.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Li Dai,Yueyuan Li,Yaoguang Wang,Xiliang Luo,Dong Wei,Rui Feng,Tao Yan,Xiang Ren,Bin Du,Qin Wei
A sandwich-type electrochemical immunosensor for prostate-specific antigen (PSA) detection was constructed. In this sensing platform, palladium nanoparticles (Pd NPs) loaded electroactive amino-zeolitic imidazolate framework-67 (Pd/NH 2 -ZIF-67) nanocomposite is utilized as a novel redox mediator . Pd NPs, as the labeling signal molecule, owns good biocompatibility and excellent catalytic performance. Meanwhile, the electroactive ZIF-67 with lamellar structures serves not only as a carrier of Pd NPs but also as a synergistic catalyst of palladium to decompose H 2 O 2 . Amperometric method is used to determine the current signal generated on the electrode surface , which is conducive to achieve the quantitative determination of PSA. Under optimum conditions, the proposed immunosensor shows a wide detection range from 100 fg mL –1 to 50 ng mL –1 with a low detection limit of 0.03 pg mL –1 , featuring favorable selectivity, repeatability and stability. This proposed immunosensor is expected to be a powerful tool for realizing quantitative detection of PSA and other biomarkers in actural sample analysis.
研究领域:
生物医学工程
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分析化学
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2022
·
IF 4.598
Kan Liu,Wenli Zhang,Man Tang,Zhipeng Wang,Yanqin Yang,Songzhan Li,Hao Long
The performance of supercapacitors not only depends on the structure of the electrode but also relates to the composition of electrode material. The binder-free integrated electrodes were obtained from NiCo 2 O 4 nanosheets grown on nitrogen-doped carbon and Co aggregation (NC/Co) nanowires through a hydrothermal process and subsequent annealing. The NiCo 2 O 4 @NC/Co composite presents the stereostructure with NC/Co nanowire supports and intertwined NiCo 2 O 4 ultrathin nanosheets. The NiCo 2 O 4 @NC/Co electrode demonstrates excellent electrochemical capacitive performances and cycling stability, where it illustrates a splendid specific capacitance of 1112 F g −1 at 1 A g -1 and maintains around 90.7 % of the maximum capacitance after 5000 cycles. Besides, the functionalized asymmetric supercapacitor (ASC) was fabricated based on NiCo 2 O 4 @NC/Co and NC with KOH-PVA solid electrolyte. The NiCo 2 O 4 @NC/Co // NC ASC possesses a stabilized operating potential range of 1.6 V and retains around 81.1 % retention after 5000 cycles. This makes a great potential for Ni-Co multiple compound electrodes for high-performance energy storage systems.
研究领域:
材料科学
·
能源存储
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高影响因子
TALANTA
·
2023
·
IF 6.1
Luxuan Yao,Shan He,Yiyu Chen,Huiting Lian,Bin Liu,Chengcai Lai,Xiaofeng Wei
Abnormal expression of alkaline phosphatase (ALP) in serum has received considerable attention in health monitoring and disease diagnosis. However, conventional optical analysis based on a single signal must compromise background interference and limited sensitivity in trace analysis . As an alternative candidate, the ratiometric approach depends on the self-calibration of two independent signals in a single test to minimize interferences from the background for accurate identification. Here, a carbon dot/cobalt-metal organic framework nanocoral (CD/Co-MOF NC) mediated fluorescence-scattering ratiometric sensor has been developed for simple, stable, and highly sensitive detection of ALP. ALP-responsive phosphate production was used to coordinate cobalt ion and collapse the CD/Co-MOF NC, resulting in the recovery of fluorescence signal from dissociative CDs and the decrease of second-order scattering (SOS) signal from the cracked CD/Co-MOF NC. The ligand-substituted reaction and the optical ratiometric signal transduction provide a rapid and reliable chemical sensing mechanism. The ratiometric sensor effectively converted ALP into a ratio signal of fluorescence-scattering dual emission throughout a wide linear concentration range of six orders of magnitude with a detection limit of 0.6 mU/L. In addition, self-calibration of fluorescence-scattering ratiometric method can reduce background interference and improve sensitivity in serum, approaching recoveries of ALP from 98.4% to 101.8%. Due to the above advantages, the CD/Co-MOF NC mediated fluorescence-scattering ratiometric sensor readily provides rapid and stable quantitative detection of ALP as a promising in vitro analytical method for clinical diagnostics.
研究领域:
分析化学
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生物医学工程
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临床诊断
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2023
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IF 3.8
Zhanqing Yu,Xiaoli Hu,Zhongmin Su
Cobalt-based metal-organic frameworks (MOFs) have been used as catalysts to remove macromolecular organic pollutants from wastewater. In this work, a novel type of cobalt-based MOF, CUST-593, was synthesized from cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), 2,2-bipyridine (BIPY), and 4,4ˊ,4ˊˊ-nitrilotrisbenzoic acid (NTB) using solvothermal method. The catalytic properties of CUST-593 for degrading dyes in water were then investigated. CUST-593, with the chemical formula {Co(NTB)(BIPY)(H 2 O)·0.5H 2 O·0.1DMA}, exhibited excellent catalytic activity in degrading dyes such as methyl orange (MO) and rhodamine B (RhB) in aqueous solutions. CUST-593 has a multi-layered structure, connected by carboxylate hydrogen bonds, which is beneficial to improving its water stability. Synthetic test results showed that CUST-593 effectively attacked dyes by primarily generating sulfate radicals (SO 4 •− ) and a portion of hydroxyl radicals (•OH). Under the testing conditions, MO removal efficiency reached approximately 95 %. Moreover, CUST-593 exhibited remarkable cycling catalytic properties, broad pH range applicability, and long-term effectiveness. A mechanism for the degradation of dyes by CUST-593 was proposed. The experimental findings in this study collectively support the conclusion that CUST-593 serves as a green and environmentally friendly catalyst for the degradation of dyes in polluted water.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Peng-Fei Qiu,Xiu-Niang Tan,Zai-Yin Huang,Yan Zhou
The low conductivity of many traditional metal–organic-framework (MOF)-based electrode limits their developments in the field of electrochemical energy storage and still of great challenge. The controllable preparation of various kinds of nanomaterials using thiol-functionalized MOF shows great prospects. In this work, a thiol-functionalized metal–organic framework sheet structure ( Co-MOF/NF ) on nickel foam was successfully prepared by in situ interfacial growth synthesis, which was transformed into its derivatives S-doped β-Co(OH) 2 nanoflowers Co-x/NF ( x = 1, 2 and 6) in different concentrations of KOH solutions through ion etching/exchange reaction. The pristine thiol-functionalized Co-MOF/NF and its derivatives Co-x/NF ( x = 1, 2 and 6) nanoflower-like arrays could be used as positive electrode materials for effective supercapacitors. Among them, the transformation of the nanoflower-like Co-1/NF electrode exhibits excellent electrochemical properties with high areal capacitance (1925 ± 23 mF/cm 2 at 1 mA/cm 2 ), good rate performance, excellent conductivity and decent cycling stability. The Co-1//AC ASC device provides a high energy density of 0.176 mWh/cm 2 (92.6 Wh/kg) at a power density of 0.745 mW/cm 2 (392.1 W/kg). And this Co-1//AC ASC device exhibits a good cycling stability and practical application in energy storage field. This study provides a new strategy for the pristine thiol-functionalized MOF and its conversion nanostructures for energy storage applications.
研究领域:
材料科学
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电化学能源存储
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高影响因子
Journal of Magnesium and Alloys
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2025
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IF 13.8
Zexuan Yang,Yazhou Wang,Xia Lin,Yongjin Zou,Cuili Xiang,Fen Xu,Lixian Sun,Yong Shen Chua
Magnesium-based hydrogen storage materials, such as MgH 2 , have attracted considerable attention because of its superior hydrogen storage capacities, inexpensive, and excellent reversibility. However, their high thermodynamic stabilities and slow kinetics lead to relatively high desorption temperatures, which severely limit the wide application of MgH 2 . In this study, the inclusion of vanadium induced the formation Ni-Co metal–organic frameworks (MOF) from a NiCo layered double hydroxide (LDH), thereby increasing the number of defects and vacancies, and improving the hydrogen storage properties of MgH 2 . The synthesized NiCo-MOF/V-O-doped MgH 2 system demonstrates excellent hydrogen storage capacity. More specifically, 5 wt.% of H 2 was released over 20 min at a relatively low dehydrogenation temperature of 250 °C, and almost complete dehydrogenation was achieved at 300 °C for 5 min. In addition, at 125 °C, the hydrogen storage material absorbed 5.5 wt.% H 2 in 10 min. Furthermore, the activation energy of dehydrogenation was determined to be 69.588 ± 6.302 kJ ·mol −1 which is significantly lower than that of the ball-milled MgH 2 (i.e., 118.649 ± 2.825 kJ ·mol −1 ). It was therefore inferred that during dehydrogenation process, a Mg 2 Ni/Mg 2 NiH 4 hydrogen pump is formed by Ni, while the V-H and Co-H bonds formed by Co and V during the reaction act synergistically to catalyze the absorption and desorption of hydrogen, thereby increasing the hydrogen storage capacity of MgH 2 . These experiments provide new perspectives on the commercial application of MgH 2 .
研究领域:
材料科学
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化学工程
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.9
Di-Ming Chen,Yi-Han Rong,Xue-Jing Zhang,Shao-Ming Fang
A novel ultramicroporous Co-MOF has been constructed using a mixed N/O-bifunctional ligand strategy. • It exhibits preferential C 2 H 6 adsorption over C 2 H 4 at 298 K, with a C 2 H 6 uptake of 3.9 mmol/g at 1 bar. • The IAST selectivity for a C 2 H 6 /C 2 H 4 (10/90) mixture reaches 2.0 at 1 bar, and the separation potential is 1.1 mmol/g. • GCMC simulations and DFT calculations reveal that multiple C–H···O and C–H···π interactions contribute to a higher binding energy for C 2 H 6 (−12.22 kcal/mol) than for C 2 H 4 . The separation of ethane (C 2 H 6 ) from ethylene (C 2 H 4 ) is a crucial but energy-intensive process in the petrochemical industry. Developing adsorbents that preferentially capture C 2 H 6 over C 2 H 4 (inverse selectivity) enables one-step production of high-purity C₂H₄. Herein, we report a novel ultramicroporous cobalt-based metal–organic framework, 1 , constructed from a mixed N/O-bifunctional ligand strategy using 4-(4-carboxyphenyl)-1,2,4-triazole (HCPT) and isonicotinic acid (HINA). Single-crystal X-ray diffraction reveals that 1 features one-dimensional rhombic channels with pore dimensions of 4.48–5.81 Å, fully coordinated Co(II) centers, and pore surfaces decorated with aromatic rings and uncoordinated O atoms. The activated framework ( 1a ) exhibits a Brunauer–Emmett–Teller surface area of 517 m²/g and shows preferential C 2 H 6 adsorption over C 2 H 4 at 298 K, with C 2 H 6 uptake of 3.9 mmol/g at 1 bar. Ideal adsorbed solution theory selectivity for a C 2 H 6 /C 2 H 4 (10/90) mixture reaches 1.81 at 298 K and 1 bar, and the separation potential is 1.1 mmol/g. Grand canonical Monte Carlo simulations and density functional theory calculations reveal that C 2 H 6 forms multiple C–H···O and C–H···π interactions with the framework, resulting in a higher binding energy (−12.22 kcal/mol) than C 2 H 4 (−10.61 kcal/mol). This work demonstrates that the mixed N/O-donor ligand strategy is effective for designing inverse-selective MOFs for energy-efficient ethylene purification. A novel ultramicroporous Co-MOF was constructed using a mixed N/O-bifunctional ligand strategy (HCPT and HINA). The activated framework features one-dimensional rhombic channels (4.48–5.81 Å), fully coordinated Co(II) centers, and pore surfaces decorated with aromatic rings and uncoordinated O atoms. It exhibits preferential C₂H₆ adsorption over C₂H₄ at 298 K, with a C₂H₆ uptake of 3.9 mmol/g at 1 bar. The IAST selectivity for a C 2 H 6 /C 2 H 4 (10/90) mixture reaches 2.0 at 1 bar, and the separation potential is 1.1 mmol/g. Grand canonical Monte Carlo simulations and density functional theory calculations reveal that C 2 H 6 forms multiple C–H···O and C–H···π interactions with the framework, resulting in a higher binding energy (−12.22 kcal/mol) than C 2 H 4 (−10.61 kcal/mol). This work demonstrates that the mixed N/O-donor ligand strategy is effective for designing inverse-selective MOFs for one-step ethylene purification. Download: Download high-res image (319KB) Download: Download full-size image
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DYES AND PIGMENTS
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2022
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IF 5.122
Qing Sun,Jingfeng Zhao,Zhibo Hu,Jian Zhang,Jun Yan,Jiawei Sheng
In this work, we successfully report the design and synthesis of rod-like CoAl 2 O 4 /halloysite hybrid pigment from zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF) and tubular halloysite via a facile two-step route for the first time. The as-prepared nanostructures were thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared reflection (FTIR Spectroscopy), thermogravimetric and differential scanning calorimetry (TG-DSC), X-ray photoelectron spectrometer (XPS), ultraviolet–visible spectrometry (UV–vis) and CIE L* a* b* colorimetric method . XRD patterns indicated that the presence of CoAl 2 O 4 spinel was observed at various temperatures ranging from 800 to 1100 °C. The SEM and TEM images showed that the nano-pigment has a rod-like hybrid structure composed of nano CoAl 2 O 4 particles and SiO 2 . The color performance of the fabricated pigments was evaluated and given suitable color coordinates (L* = 44.72, a* = −14.40, b* = −37.83) and (L* = 42.57, a* = −7.68, b* = −41.14) at the calcination temperature of 1100 °C for 2 h and 3 h, respectively. The mechanism study indicated that these composites were formed by Co 3 O 4 derived of ZIF-67 as highly active cobalt source and Al 2 O 3 decomposed from halloysite substrate as aluminum source. In addition, the corrosion resistance test showed that the CoAl 2 O 4 composites retain crystalline stability, almost no color deviation in CIE chromatic system even after 1 M HCl leaching. Furthermore, the CoAl 2 O 4 /halloysite exhibited excellent thermal and suspension stability, which indicated it could be a promising candidate for ceramic glazes and water-borne coatings. These findings provide insight into a new strategy for the synthesis of clay mineral-based ceramic pigment .
研究领域:
材料科学
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无机化学
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高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 14
·3327-3338
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IF 4.495
Man Yuan,Hongbo Zhang,Chen Yang,Fanhao Wang,Zhengping Dong
Graphical It′s nanoreactor time : Co@ZDC@mC nanoreactor with a hierarchical mesoporous yolk-shell structure was successfully prepared by the high-temperature carbonization of a ZIF-67@polymer composite. The Co@ZDC@mC-700 exhibited superior catalytic efficiency in the catalytic reduction of nitrobenzene with N 2 H 4 ⋅H 2 O, and also showed good reusability and recyclability. Porous nanoreactors demonstrate immense potential for applications in heterogeneous catalysis due to their excellent mass-transfer performance and stability. The design of a simple, universal strategy for fabricating nanoreactor catalysts is of significance for organic transformation. In this study, a nanoreactor with a hierarchical mesoporous yolk-shell structure was successfully prepared by the high-temperature carbonization of a ZIF-67@polymer composite. The core of the resultant Co@ZDC@mC material comprised Co NPs anchored in the ZIF-67-derived carbon framework, while the shell comprised resin-polymer-derived mesoporous carbon. The as-obtained Co@ZDC@mC-700 catalyst enriched reactants, efficiently catalyzed the reaction in the core, and permitted the desorption of the product from the nanoreactor. In the catalytic reduction of nitrobenzene with N 2 H 4 ⋅H 2 O, Co@ZDC@mC-700 exhibited superior catalytic efficiency (TOF=1136.3 h −1 ). In addition, Co@ZDC@mC-700 exhibited excellent performance for the catalytic reduction of various functionalized nitroarenes, as well as good reusability and recyclability. Hence, a simple, useful approach for fabricating a metal-organic-framework-derived non-noble metal-based yolk-shell nanoreactor for effective catalytic transformation is proposed.
研究领域:
材料科学
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催化化学
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 40
·17413-17421
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IF 3.288
Haifu Zhang,Jie He,Xinhuan Lu,Lu Yang,Chenlong Wang,Fanfan Yue,Dan Zhou,Qinghua Xia
In the past decades, many methods have been developed for synthesizing MOFs, including solvothermal synthesis, mechanical synthesis, electrochemical synthesis, and microwave synthesis. Based on the existing research, a method is proposed for synthesizing Co-MOF by rapidly rotating hydrothermal crystallization, which largely shortens the crystallization time of Co-MOF. When the rotation speed was 150 rpm, only 2 h of crystallization time was needed to synthesize Co-MOF-150-2 with high crystallinity and stability. The optimal Co-MOF-150-2 manifested remarkable activity and selectivity for the epoxidation of α-pinene under mild conditions. The catalytic conversion of α-pinene reached the highest over the Co-MOF-150-2 catalyst, in which the conversion of α-pinene was 99.5% and the yield of 2,3-epoxypinane was 95.7%. The Co-MOF materials synthesized by the rotary method also had excellent stability and highly catalytic activity in recycling experiments.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Ling Qin,Xiao-Yan Zhou,Ying-Xin Zhao,Jin-Long An,Jing-Yu Huang,Wang-Chao Chen,Ming-Dao Zhang
The rational preparation and development of efficient and stable non-precious metal catalysts for the hydrogen evolution reaction are an effective solution to solve the global energy shortage and the increasing environmental pollution problems. Herein, two Co-MOFs with similar structures were designed and synthesized, one based on sulfur-containing organic ligand and the other based on non-sulfur-containing organic ligand. The electrocatalytic performance results showed that the materials based on sulfur-containing organic ligand had a better electrocatalytic hydrogen evolution performance. The reasons of performance differentiation were analyzed by various characterization techniques.
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高影响因子
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