APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2025
·Vol. 131
·期 5
·1-11
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IF 2.8
Li Yingying,Tang Xingyue,Li Boyang,Luo Yani,Wang Yijing,Wang Xiaolian
Metal-organic frameworks (MOFs) have emerged as promising catalysts for the oxygen evolution reaction (OER) in water electrolysis. This study synthesizes a nickel-based MOF on a nickel foam substrate (NiMOF/NF) via a solvothermal method and fabricates NiMOF-FeOOH/NF composites through Fe electrodeposition. The NiMOF-FeOOH 600 /NF composite, prepared with a 600 s electrodeposition time, exhibits an overpotential of 320 mV at 20 mA·cm -2 and a Tafel slope of 126 mV·dec -1 . Compared to unmodified NiMOF/NF, the overpotential was reduced by 320 mV and the Tafel slope by 146 mV dec -1 . In addition, no significant performance degradation was observed during the 40 h stability test. Further results demonstrated that deposition of Fe ions significantly improved the intrinsic conductivity of NiMOF/NF, enabling more efficient charge transfer during the OER process. Additionally, the modified FeOOH surface morphology increased the number of accessible active sites and enhanced the exposure of catalytic centers. In summary, these structural and electronic modifications synergistically improve the overall catalytic performance and have guiding significance for the application of MOF to OER.
研究领域:
材料科学
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电化学
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催化剂研究
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Sohail Mumtaz,Muhammad Imran,Amir Muhammad Afzal
In this study, we develop photoresponsive heterogeneous Cobalt-nickel-based MOFs (CoNi-MOFs), cobalt dioxide (CoO 2 ), and tungsten diselenide (WSe 2 ) hybrid device to improve the performance of photo-assisted supercapacitors. We measure the electrochemical characteristics of photo-assisted hybrid electrodes under both dark and light conditions using cyclic voltammetry and galvanostatic charge–discharge. In dark, a high specific capacity (Qs) is estimated at 970 C/g, increased to 1230 C/g under the light in three-electrode assemblies. An FTO/CoNi-MOF@CoO 2 @WSe 2 /Electrolytes//PANI@AC/GS photo hybrid supercapacitors device is designed and measured in both conditions. The hybrid device showed Qs of 325 C/g in light conditions with energy and power densities of 72 Wh/kg and 827 W/kg, respectively. Even after undergoing 6000 cycles, it exhibited a capacity retention (CR) rate of 91 % and columbic efficiency of 93 %, indicating its exceptional durability as an energy storage device. Besides, the composite devices detect zearalenone in agricultural food samples. The optimal signal for Zearalenone in phosphate buffer solution was observed at pH 7.0, yielding the highest detected response. The sensor demonstrated a broad linear dynamic range of 1–300 μM and an impressively low detection limit of 0.5 nM for Zearalenone concentration. The CoNi-MOF@CoO 2 @WSe 2 nanocomposite has a remarkable sensitivity value of 110.72 mA/cm −2 /mM −1 and response against zearalenone in light. The findings also suggest that the capacitance of the CoNi-MOF@CoO 2 @WSe 2 electrode may increase at an optimal temperature. This likely occurs due to enhanced ion diffusion and charge transfer kinetics, which can improve the energy storage device’s efficiency and aid in identifying the cancerous part of the body.
研究领域:
材料科学
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分析化学
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能源存储
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食品安全检测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Chengcheng Pan,Zhicheng Liu,Minghua Huang
Recently, metal–organic framework (MOF) manifests an outstanding oxygen evolution reaction (OER) catalytic activity due to its structural diversity, highly ordered pore structure and abundant active sites. Herein, through a facile one-step solvothermal method, iron-doped nickel MOF nanosheets in situ grown on conductive nickel foam (Fe-Ni MOF NSs/NF) were conveniently fabricated as efficient OER catalyst, using only one kind of metal salt precursor. The ultrathin 2-dimensional sheet structure possesses highly exposed surface area and numerous metal sites which are beneficial to electrocatalytic OER performance. The Fe-Ni MOF NSs/NF presents superior OER activity in 1 M KOH, requiring overpotentials of 258 and 270 mV to deliver the current density of 50 and 100 mA cm −2 , along with a low Tafel slope of 40.8 mV dec −1 . Moreover, the durability of the Fe-Ni MOF NSs/NF catalyst is also outstanding, exhibiting only minor chronoamperometric decay after 24 h continuous operation at 50 mA cm −2 . The excellent OER activity could be ascribed to the coupling effects of ultrathin-nanosheet structure, favorable charge transfer kinetics, high conductivity and excellent intrinsic catalytic activity. This facile and economical strategy might be advantageous to prepare other high-performance MOF-based OER catalysts.
研究领域:
材料科学
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电化学
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yafeng Jin,Guangri Xu,Xiaobo Li,Jingjing Ma,Li Yang,Yuanchao Li,Huan Zhang,Zhen Zhang,Donghao Yao,Donghao Li
To circumvent the binder’s adverse effect on the performance of electrochemical sensor and improve the analysis efficiency, a binder-free cobalt-doped Ni-MOF (Co/Ni-MOF) film, with honeycomb-like structure, is fast electrodeposited on glassy carbon electrode (GCE) by cathodic reduction. No conductive agent added, the Co/Ni-MOF/GCE can be directly used as a sensor for levofloxacin (LEV) determination. Under the optimal condition, a wider linear range of 0.1 μM–500 μM LEV is obtained with the limit of detection (LOD, 3S/N) being 22 nM and the sensitivity of 2.85 μA μM −1 cm −2 . Further, when being used to analysis of LEV in eye drop and spiked milk, satisfactory recoveries of 94.0%–108.2% are achieved. Particularly, benefiting of the synergistic effect of Co 2+ and Ni 2+ , as well as and the binder-free film, the sensor exhibits an excellent sensitivity and a robust long-term stability. This work develops a facile and efficient strategy to synthesis of Co and Ni based MOF film, and provides them a new way in electrochemistry application.
研究领域:
分析化学
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电化学传感器
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产品关联
DOI
高影响因子
CATALYSIS TODAY
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2023
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IF 5.3
Zekun Li,Zhao Wang
Metal-organic frameworks (MOFs) have been regarded as promising OER catalyst candidates, while synthetic strategies were used to enhance the OER performance of MOFs. The coordinatively unsaturated metal sites (CUMSs) are recognized as the important active sites on MOFs. Herein, the CUMSs of nickel-based MOF (Ni-BTC) were successfully tuned by glow discharge plasma in room temperature. The electron etching strategy controlled the concentration of CUMs and remained the main structure due to the low temperature and adjustable parameters. The electrochemical activity of the Ni-BTC by is correlated with the abundance of CUMSs. Specifically, Ni-BTC-500–5 obtained by plasma etching 5 min shows a highest catalytic activity of OER, which exhibits a low overpotential (347 mV at 100 mA·cm -2 ), low Tafel slope (37 mV·dec -1 ), and large double layer capacitance (22.0 mF·cm -2 ). The mechanism of plasma etching and the role of CUMs are also discussed.
研究领域:
材料科学
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电化学
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能源催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 28
·1-15
·
IF 2.8
Wang Jia-Wei,Meng Tian-Li,Ma Ying-Xia,Lei Lei,Li Jing,Ran Fen
Metal–organic frameworks (MOFs) have low conductivity, which is not conducive to further application. To address the issue, in this work, using carboxylation multiwall carbon nanotubes (MWCNTs-COOH) as carbon materials, benzene-1,4-dicarboxylic acid (PTA) as organic ligands, nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) as transition metal ions precursors, MWCNTs decorated with nickel MOFs (Ni-MOFs/MWCNTs) nanohybrids were fabricated via in situ growth by a one-pot solvothermal method. The electrochemical properties of the Ni-MOFs/MWCNTs nanohybrids obtained by adjusting the dosage of MWCNTs-COOH and the experimental conditions as electrode materials for supercapacitors (SCs) were investigated. The results showed that the Ni-MOFs nanoflowers self-assembled by nanorods were in situ growth on the MWCNTs, which could avoid the agglomeration of Ni-MOFs and MWCNTs, enhance the specific surface area, and expose more active sites to improve the electrochemical properties. The specific capacity of the Ni-MOFs/MWCNTs nanohybrids as electrode materials obtained at the optimal experimental conditions was 749.6 C g −1 at 1.0 A g −1 .
研究领域:
材料科学
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电化学
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纳米技术
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储能
✓ 已验证
DOI
高影响因子
ANALYTICAL LETTERS
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2022
·
IF 2.267
Zhengjie Hu,Zhiying Chen,Xuwei Chen
Adsorbents for protein enrichment underline the most important foundations in proteomic application. The construction of tunable metal-organic framework (MOF) through rational selection of metal nodes and organic linkers with designed properties has attracted special interest in the field of protein enrichment. In this work, a nickel-based MOF (NiBPDC) composed of biphenyl-based organic ligand and Ni clusters was prepared which exhibits attractive adsorption efficiency and selectivity for hemoglobin (Hb) by taking advantage of the strong metal affinity and π stacking interaction between Hb and MOF. The adsorption maximum capacity of NiBPDC for Hb is 400.2 mg g−1, and the adsorbed Hb is easily recovered by 0.5% (m/v) sodium dodecyl sulfate achieving a recovery of 98.2%. An enrichment factor up to 79.8 for Hb from an extremely 300:1 mass ratio of a human serum albumin/Hb mixture was achieved. Circular dichroism (CD) spectra reveal that the recovered Hb maintained its original structure following the enrichment. The practicability of NiBPDC is confirmed by selective enrichment of Hb from complex biological samples followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis.
研究领域:
材料科学
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蛋白质组学
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分析化学
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Chengcheng Huang,Zipeng Zhao,Enming Ping,Lijuan Zhang,Yunshan Zhou,Libo Qin
The Ag@CPO-27-Ni composites were deliberately synthesized with different loading amounts of silver nano-particles in CPO-27-Ni which features unsaturated metal sites and cylindrical one-dimensional channels having a diameter of ca. 11 Å constructed by 2,5-dihydroxybenzene-1,4-dicarboxylate and Ni 2+ by a simple one-pot solvothermal method. The well-characterized composites were used as adsorbents to eliminate the aromatic S-compounds of the model oil and fluid catalytic cracking (FCC) oil at room temperature. The experimental results showed that the adsorptive desulfurization followed pseudo-second order reaction kinetics and the adsorptive desulfurization capacity of Ag@CPO-27-Ni (wherein Ag is 1.23 wt%) was notably enhanced as compared with CPO-27-Ni under the same experimental conditions. Impressively, 35 ppmw S dibenzothiophene (DBT) (or benzothiophene (BT))-containing model oil (20 g) was desulfurized to 2.01 ± 0.27 (or 4.05 ± 0.26) ppmw S by using 0.2 (or 0.5) g of the composite, respectively; the composite showed much higher selectivity factor of adsorbing DBT to naphthalene than CPO-27-Ni. The notable enhancement in adsorptive desulfurization performance is thought to be due to the interactions between Ag particles and sulfur or π-system of thiophene moiety in the S-containing compounds that consequently promote selective attraction between S-containing compounds and the composite. Besides, the composite also showed satisfactory recyclability.
研究领域:
材料科学
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环境化学
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催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）