INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Yanxia Zhu,Ze Zhang,Jun Cheng,Hao Guo,Weijuan Yang
To improve catalytic performance of metal active sites in hydrodeoxygenation and hydrocracking conversion of methyl palmitate into high-quality jet biofuel, Ni-1,3,5-benzenetricarboxylate (Ni-BTC) metal-organic framework loaded on MCM-41(Mobil Composition of Matter No. 41) was prepared to enhance the accessibility of Ni active sites, facilitating hydrodeoxygenation to increase alkane yield with suitable arene content. The distance (0.98 nm) between Ni active sites within Ni-BTC structure, which was much larger than that (0.20 nm) within Ni nanoparticles , enabled methyl palmitate with maximum molecule width of 0.68 nm to go through Ni-BTC crystalline plane and get access to Ni active sites more easily. Ni-BTC nanosheets newly assembled in pore channels of MCM-41 were beneficial to effectively screen chain molecules of alkane products. With the largest BET surface area of 1014.2 m 2 /g, the Ni-BTC@MCM-41 catalyst with 2.5 wt% nickel (2.5Ni-BTC@MCM-41) reduced the nickel metal consumption by 75% comparing to nickel nanoparticle loading (10Ni@MCM-41), but achieved the best catalytic performances through hydrodeoxygenation on Ni active sites and hydrocracking on -SiOH acid sites. The alkane yield increased from 23.3% to 33.9%, while arene yield reduced from 22.4% to 6.5% in jet biofuel products. This resulted in an overall jet biofuel yield of 53.2% with uniform distribution along carbon numbers . The higher heating value of jet biofuel products thus increased to a peak of 45.90 MJ/kg.
研究领域:
催化材料
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能源化学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2018
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IF 3.886
Fuping Tian,Qiaofeng Ru,Chenxia Qiao,Xin Sun,Cuiying Jia,Yu Wang,Yifu Zhang
This work presented the synthesis of Ni-based metal-organic framework material with a paddle-wheel structure Ni 3 (BTC) 2 (Ni-BTC) and its application in thiophene (TP) adsorption from gasoline distillate by batch method. Adsorption isotherms of TP, cyclohexene , and toluene in cyclohexane onto Ni-BTC were conducted at 298–308 K to interpret the different effect of cyclohexene and toluene on TP adsorption. The results showed that, compared with cyclohexene, toluene addition in model gasoline led to a more evident decline in sulfur capacity of Ni-BTC, which is opposite to isostructural HKUST-1. The adsorption isotherms of TP, cyclohexene and toluene fit Langmuir model, S-type model and Temkin model well, respectively, indicating that the adsorption mechanisms of TP and the two competitors are different from one another. The adsorption capacities on Ni-BTC followed the order of cyclohexene < toluene < TP at the same equilibrium concentrations , implying the order of the adsorption affinities, which is in good agreement with the different extent of influence by the two competitors. The enthalpy of TP adsorption on Ni-BTC was estimated to be −80.01 kJ/mol, almost twice that on HKUST-1. The poor reusability of Ni-BTC in batch experiment, which is owing to its sensitivity to the air, can be prevented from regenerating used Ni-BTC in fixed-bed reactor by N 2 flow. The difference between Ni-BTC and HKUST-1 in maximum adsorption capacity ( q 0 ), Δ H of TP adsorption, and stability demonstrates that the central metal in isostructural MOFs plays a key role in adjusting the desulfurization performance, which may open up a potential avenue for the development of MOF-based adsorbents with superior desulfurization performance.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Shuang Li,Mengli Yan,Chenguang Yang,Chunyu Yang,Jianwang He,Yan Xu
Large-scale utilization of hydrogen for fuel cells and chemical manufacturing imposes urgent demands on hydrogen sensing materials with superior sensitivity and selectivity. Herein, we successfully fabricated a Ni-BTC@ZIF-8 MOF-on-MOF heterostructure using polyvinylpyrrolidone (PVP) as a stabilizer and bridging agent. The hierarchical porous architecture enables size-selective microporous sieving in the outer ZIF-8 layer, facilitating H 2 permeation while blocking larger interfering molecules. This selective mass transfer optimizes H 2 accessibility at the sensing interface. Owing to the favorable mass-transport behaviour, the Ni-BTC@ZIF-8 sensor delivers an ultrahigh selectivity with a response value of 6.0 toward 20 ppm H 2 at 200 ℃, alongside an exceptionally fast recovery speed (∼6 s). Moreover, the device demonstrates excellent cycling stability and long-term reliability. This work further probes the underlying mechanism responsible for the improved H 2 -sensing performance of the MOF-on-MOF heterostructure, which arises from interfacial synergistic effects. Specifically, the intimate ZIF-8/Ni-BTC contact affords selective gas-transport channels from ZIF-8 and efficient electron-conduction pathways, with Ni-BTC serving as the active sensing layer for signal transduction. Such a synergistic interplay optimizes the coupling between molecular-sieving and sensing response. These findings provide a feasible and scalable paradigm for constructing novel high-performance hydrogen gas sensors.
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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
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Aifeng Liu,Guangshuo Wang,Hongwei Che
Ni-based metal-organic frameworks (Ni-MOFs) as electrode materials for hybrid supercapacitors face challenges including low actual specific capacity and poor cyclic stability due to their inherent low electrical conductivity and inadequate active site accessibility. Herein, Ni-BTC@NiS 2 heterostructures are designed and synthesized by in situ decoration of NiS 2 nanoparticles onto the surface of Ni-BTC microflowers employing a solvothermal reaction followed by a controlled partial sulfurization treatment. The optimized Ni-BTC@NiS 2 heterostructures as electrode materials demonstrate a maximum capacity value of 604 C g −1 at 1 A g −1 and an initial capacity retention of 91.1 % after 5000 cycles, both of which are significantly higher than those of pure Ni-BTC and NiS 2 electrodes. Furthermore, an assembled two-electrode hybrid supercapacitor device with Ni-BTC@NiS 2 as positive electrode can deliver an maximum energy density of 45.9 Wh kg −1 at 801 W kg −1 . Theoretical and experimental analyses indicate that the integration of Ni-BTC with NiS 2 enhances electronic states near the Fermi level, thereby improving electrical conductivity of Ni-BTC@NiS 2 heterostructures. Meanwhile, a built-in electric field exists at the Ni-BTC/NiS 2 interface, which not only accelerates interfacial charge transport but also enhances surface OH - adsorption, thereby significantly improving charge storage capability. In addition, the surface decoration of NiS 2 nanoparticles on N-BTC microflowers provide additional active sites. Our findings provide a promising strategy for further exploring the application potential of Ni-MOF-based heterostructures in advanced hybrid supercapacitors.
研究领域:
材料科学
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储能技术
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电化学
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纳米材料
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金属有机框架（MOFs）
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Neng Chen,Sai Che,Hongchen Liu,Guohua Li,Na Ta,Feng Jiang Chen,Bo Jiang,Ni Wu,Zhengxuan Li,Weiqi Yu,Fan Yang,Yongfeng Li
The regulation of the multi-dimensional interface plays an important role in optimizing the electron transport and gas mass transfer during catalysis, which is conducive to promoting the electrocatalytic process. Herein, a self-supporting electrode has been developed with the multistage interface within 3D Ni 2 P@C nanospheres/nanoflowers arrays derived from metal-organic frameworks (MOFs) as template skeletons and precursors. The constructed nanosphere interface protrudes outward to optimize the contact with the electrolyte while the nanoflower lamellar connection promotes rapid electron transfer and exposes more active sites, and accelerates the gas diffusion with the abundant interspace channels. According to theoretical calculation, the synergistic effect between Ni 2 P and C is conducive to the optimal adsorption and desorption of H*, thus contributing to the improvement of catalytic kinetics. With the optimized growth times assembled onto nickel foam substrates, the Ni 2 P@C-12 h requires overpotentials of only 69 mV and 205 mV to drive the current density of 10 mA cm −2 towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. And it reveals an ultralow cell voltage of 1.55 V at 10 mA cm −2 to achieve overall water splitting (OWS). In addition, the stability of the Ni 2 P@C/NF electrocatalyst emerges as prominent long-term stability, which is attributed to the carbonaceous nanosphere anchors on the substrate to minimize the possibility of oxidation of the catalyst surface. This strategy of in situ growth of MOF-derived phosphates provides a general idea for interfacial engineering modification of OWS electrode materials.
研究领域:
材料科学
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电化学
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催化工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Nan Song,Weiguang Hu,Zengyi Ma,Chao Ai,Hong Li,Xinyu Sun,Qing Yan,Qingchao Xia,Weiyong Yuan
The hydrogen evolution reaction (HER) largely determines the performance of Al/seawater batteries, but reported conventional HER catalysts possess low intrinsic activity in the seawater environment, even for the expensive and scarce Pt-based ones. For the first time, a NF-supported Ni-BTC nanoflower array (NF@Ni-BTC NFA) has been synthesized via urea-mediated self-assembly, whereby the urea in situ generates NH 3 to serve as a modulator to both coordinate with Ni 2+ and deprotonate BTC. This 3-D nanostructure exhibits superior HER activity than the NF-supported nanosheet array obtained without urea and even commercial Pt/C in the KOH-added simulated seawater. An Al/seawater battery has been fabricated directly using NF@Ni-BTC NFA as the cathode, showing higher power density, anode efficiency, and energy density than all the reported Al/H 2 O batteries measured in the electrolyte without addition of corrosion inhibitors. This work not only develops a low-cost, highly efficient noble-metal-free HER catalyst for high-performance Al/seawater batteries via facile and economical self-assembly strategy, but provides scientific insights for the self-assembly mechanism and high performance of the HER catalyst and the Al/seawater batteries.
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Yang Xu,Hao Guo,Yuxiang Mao,Lei Qian,Weijuan Yang,Jun Cheng
To enhance deoxygenation and cracking performance of microalgal biodiesel to produce a jet fuel-range hydrocarbon blend, an efficient Ni-carbon composite was prepared by pyrolyzing Ni-based metal–organic frameworks (Ni-1,3,5-benzenetricarboxylate, Ni-BTC) for catalytic conversion with a substantially reduced catalyst dosage. Coordinated Ni ions in the Ni-BTC precursor were converted into highly active Ni nanoparticles due to catalyst pyrolysis, while an increased specific surface area of the catalyst facilitated mass transfer in microalgal biodiesel conversion. X-ray absorption fine structure analysis confirmed the formation of Ni–Ni active sites, while density functional theory calculations revealed that the C═C bond was the initial site for the cracking reaction of long-chain fatty acids. The selectivity of jet-fuel-range products in methyl palmitate conversion over the Ni@C500 (Ni-BTC pyrolyzed at 500 °C) catalyst increased to 71.46% with a substantially reduced catalyst dosage (the mass ratio of catalyst to reactant was 1:200). The Ni@C500 catalyst exhibited excellent performance with high selectivity (71.6%) and conversion efficiency (97.46%) in deoxygenation and cracking of microalgal biodiesel for jet fuel-range hydrocarbon blend production.
研究领域:
催化化学
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能源材料科学
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产品关联
DOI
高影响因子
Catalysts
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2020
·Vol. 10
·期 4
·401
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IF 3.52
Mengzhao Jiao,Jie He,Shanshan Sun,Frank Vriesekoop,Qipeng Yuan,Yanhui Liu,Hao Liang
Carbonic anhydrase (CA) has received considerable attention for its ability to capture carbon dioxide efficiently. This study reports a simple strategy for immobilizing recombinant carbonic anhydrase II from human (hCA II) on Ni-based MOFs (Ni-BTC) nanorods, which was readily achieved in a one-pot immobilization of His-tagged hCA II (His-hCA II). Consequently, His-hCA II from cell lysate could obtain an activity recovery of 99% under optimal conditions. After storing for 10 days, the immobilized His-hCA II maintained 40% activity while the free enzyme lost 91% activity. Furthermore, during the hydrolysis of p-nitrophenyl acetic acid, immobilized His-hCA II exhibited excellent reusability and still retained more than 65% of the original activity after eight cycles. In addition, we also found that Ni-BTC had no fixation effect on proteins without histidine-tag. These results show that the Ni-BTC MOFs have a great potential with high efficiency for and specific binding of immobilized enzymes.Keywords:one-pot hydrothermal;immobilizing recombinant;His-hCA II;Ni-BTC nanorods
研究领域:
生物化学
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材料科学
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酶工程
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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）