COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Zongtang Liu,Congcong Ding,Pingting Gao,Yunxia Xu,Yufeng Sun,Xiaoju Wen,Jingtao Dai,Zhenghao Fei
For the first time, the dechlorination of 2,6-dichlorophenol (2,6-DCP) by carbon nanotubes supported Fe/Ni nanoparticles (CNTs-Fe/Ni) was studied to explore the practicability of environmental remediation. Removal capacity of CNTs-Fe/Ni for 2,6-DCP was enhanced obviously compared to Fe/Ni due to reduced aggregation of Fe/Ni nanoparticles .The removal efficiency increased as the increase of CNTs-Fe/Ni dosage and Ni loading, whereas it decreased as the increase of 2,6-DCP concentration. Weak acidic condition was considered to be advantageous to 2,6-DCP dechlorination. The dechlorination kinetics results suggested that the 2,6-DCP removal by CNTs-Fe/Ni accorded with pseudo-first-order equation. Moreover, carbon nanotubes as support accelerated the mass transfer of 2,6-DCP from solution to catalyst surface and promoted the formation of atomic hydrogen, which also led to an enhancement of reactivity of CNTs-Fe/Ni on removing 2,6-DCP.
研究领域:
环境科学
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纳米技术
·
化学工程
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Wenwen Yin,Jiawei Ma,Yanyan Li,Qing Cheng,Bernt Johannessen,Fangxi Xie,Mingmei Wu
Exploiting bifunctional and highly efficient electrocatalysts that can facilitate the reversible formation and decomposition of discharge products is crucial for rechargeable Na-air batteries (SABs). However, restricted by scaling relations, air cathodes based on single metal systems usually exhibit inferior activity and fail to achieve a stable and long cycle life of Na-air batteries. Dual single-atom catalysts (DACs) with two metal sites can circumvent the scaling relations and endow the single-atom catalysts with superior activity. Herein, we present a hollow carbon microsphere loaded with Ni and Fe single atoms (Ni-HCMs-Fe) as a demonstration of DAC air cathodes for SABs. Notably, Na-air batteries with Ni-HCMs-Fe as an air cathode can achieve a low overpotential gap of 530 mV, a high specific capacity of 5382.9 mAh g−1, and an ultralong cycle life of over 450 cycles (1800 hours) with NaO2 as the main discharge product. Due to the different adsorption energies between oxygenated intermediates and Ni/Fe sites, the Ni-HCMs-Fe catalysts can break through the scaling relations and display optimized binding ability towards intermediates, thus boosting the reversible formation and decomposition of NaO2 in SABs. This work pioneers the use of DACs in SABs, paving the way for their practical applications.
研究领域:
电化学
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能源材料
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纳米催化
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先进电池技术
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产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2025
·
IF 2.9
Jiaqi Li,Yidan Zhang,Pingyu Luo,Chun Li,Fanming Zeng,Tiantian Sun,Hanhui Lei,Xiaoteng Liu,Chunbo Liu
Persulphate-based advanced oxidation technology efficiently and cost-effectively removes organic dyes from water but designing stable photocatalytic systems and understanding their reaction mechanisms remain key challenges. Metal–organic frameworks (MOFs) have attracted considerable research attention for degrading organic pollutants owing to their high porosity, tunable structure, and ease of modification. In this study, a series of M-MOF-74 (M = Co, Fe, Ni) photocatalysts are synthesized by a hydrothermal method for methylene blue (MB) degradation. Among them, the Co-MOF-74 photocatalytic synergetic peroxymonosulfate system exhibits high catalytic activity after 30 min of visible light irradiation. MB degradation efficiency reaches 94.8%, and the reaction rate constant is 0.210 min−1, which is approximately 19.44 times higher than the reaction rate constant of the original Co-MOF-74. Compared with Fe-MOF-74 and Ni-MOF-74, Co-MOF-74 exhibits better photocatalytic performance due to the dynamic changes in the valence state of cobalt, which more effectively facilitate the activation of PMS. In addition, this study analyses the possible degradation pathways of MB in water and toxicological evaluations of intermediate products, providing new insights for the effective removal of dyes in water.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Mutian Zhang,Ziying Ji,Xing Wang,Yulin Ouyang,Zening Yang,Siyuan Zhou,Miao Zeng,Wei Zheng,Jiajia Wang,Guobing Ying
Understanding the catalytic mechanisms of the alkaline hydrogen evolution reaction (HER) is essential for the rational design of efficient catalysts. In this work, Fe/Ni-doped Co 3 O 4 systems were investigated by combining DFT+U calculations with experimental validation. Theoretical simulations reveal that both dopants induce spin-state transitions in Co 3+ , tune orbital hybridization, and redistribute reaction energy barriers across elementary steps rather than uniformly lowering them on the Co 3 O 4 (110) surface. Hydrothermally synthesized Fe-Co 3 O 4 and Ni-Co 3 O 4 microflower spheres confirm these predictions: Ni doping lowers the overall reaction barrier by optimizing the electronic structure and adsorption energetics associated with high-spin Co 3+ , leading to a reduced onset overpotential, whereas Fe doping facilitates water dissociation via enhanced spin polarization, thereby lowering the rate-determining barrier and improving kinetics at high current densities. Further analyses identify reliable descriptors for different catalytic advantages: the overall reaction barrier, d -band center, and covalent bonding degree of water adsorption serve as indicators of thermodynamically favorable catalysts with low overpotential, whereas the rate-determining step barrier and d-p coupling are key descriptors of kinetically favorable catalysts with enhanced current-density performance. This study clarifies the step-specific roles of spin-state modulation and provides a framework for catalyst design based on energy barrier redistribution.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
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IF 4.939
Shan Yuan,Lili Cui,Xingquan He,Wei Zhang,Tewodros Asefa
Developing highly active, stable and sustainable electrocatalysts for overall water splitting is of great importance to generate renewable H 2 for fuel cells. Herein, we report the synthesis of electrocatalytically active, nickel foam-supported, spherical core-shell Fe-poly(tetraphenylporphyrin)/Ni-poly(tetraphenylporphyrin) microparticles (FeTPP@NiTPP/NF). We also show that FeTPP@NiTPP/NF exhibits efficient bifunctional electrocatalytic properties toward both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER). Electrochemical tests in KOH solution (1 M) reveal that FeTPP@NiTPP/NF electrocatalyzes the OER with 100 mA cm −2 at an overpotential of 302 mV and the HER with 10 mA cm −2 at an overpotential of 170 mV. Notably also, its catalytic performance for OER is better than that of RuO 2 , the benchmark OER catalyst. Although its catalytic activity for HER is slightly lower than that of Pt/C (the benchmark HER electrocatalyst), it shows greater stability than the latter during the reaction. The material also exhibits electrocatalytic activity for overall water splitting reaction at a current density of 10 mA cm −2 with a cell voltage of 1.58 V, along with a good recovery property. Additionally, the work demonstrates a new synthetic strategy to an efficient, noble metal-free-coordinated covalent organic framework (COF)-based, bifunctional electrocatalyst for water splitting.
研究领域:
材料科学
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电化学
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可再生能源
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产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Yu Wang,Jia Chen,Ming Guan,Hongdeng Qiu
An iron–nickel bimetallic oxide porous graphene composite material (Fe/Ni-PG) was prepared by a simple partial combustion method, which can be used to effectively remove sulfonamides (SAs) from an aqueous solution. The adsorption performance of Fe/Ni-PG, Fe-PG, and Ni-PG on six kinds of SAs was compared, and the influence of time, temperature, pH, and initial concentration of SAs on the adsorption behavior of SAs of Fe/Ni-PG in an aqueous solution was studied. The adsorption kinetics and thermodynamics exhibited that the Langmuir model and pseudo-second-order kinetics model can describe the adsorption isotherm and kinetics. The maximum adsorption capacities of sulfadiazine (SD), sulfamerazine (SM), sulfamethazine (SDM), sulfathiazole (STZ), sulfapyridine (SPD), and sulfisoxazole (SIZ) calculated by the Langmuir model were 26.3, 50.3, 42.2, 27.3, 34.5, and 41.7 mg/g, respectively, which exceeded those of most reported adsorbents. In the adsorption process, hydrogen bonding, π–π electron donor–acceptor, electrostatic interaction, and bimetallic synergies play a major role, and the entire adsorption process is spontaneously endothermic. In addition, the material has excellent stability, and the Fe/Ni-PG after desorption is consistent with the raw material. This work provides a favorable way for the removal of SAs in the environment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Shiyu Zhang,Mengru Li,Jingwen Wang,Ruonan Zhang,Xiaoyu Ma,Haisheng Tao
Metal-organic frameworks with high porosity have received much attention in environmental pollutant treatment. This study presented a simple single-pot solvent thermal method for the preparation of a bimetal-organic framework MIL-53(Fe,Ni), further used for activated peroxydisulfate to degrade rhodamine B (RhB). The morphology and structure of the sample were characterized by scanning electron microscopy, transmission electron microscopy , x-ray diffraction, photoelectron spectroscopy , fourier transform infrared spectroscopy , and thermogravimetric analysis . The results showed that MIL-53(Fe,Ni) was successfully synthesized by the simple reaction, with high thermal stability and high specific surface area. The effects of pH value, co-existing ions, temperature, humic acid and different real water samples on RhB degradation were systematically investigated. Under optimized conditions, 93.9% of RhB was degraded within 180 min, together with excellent reusability. Quenching experiments and electron paramagnetic resonance showed that both free radicals (∙OH, SO 4 ∙- and O 2 ∙- ) and non-free radicals ( 1 O 2 and direct charge transfer) were responsible for the RhB degradation. In addition, the identification of intermediates by high-resolution mass spectrometer and reaction site prediction calculations (electrostatic potential, Fukui function and molecular orbit analysis), proposing a possible degradation pathway of RhB. The work highlights the broad applications of bimetal-organic frameworks in advanced oxidation processes .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2023
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IF 6.4
Xinyue Mao,Qingnan Meng,Mu Yuan,Sifan Wang,Shiyin Huang,Baochang Liu
The weak interfacial strength between Fe-based matrix and diamonds causes diamond particles to fall off prematurely, significantly affecting the cutting efficiency of diamond composites. This work aimed to optimize the interfacial microstructure and mechanical properties of the diamond/Fe-Ni-WC composites by coating a Mo 2 C layer on the diamond particles. The Mo 2 C-coated diamonds were prepared via the molten salt method. Diamond/Fe-Ni-WC composites were sintered by the hot-pressing process under a vacuum. The bending strength of composites with Mo 2 C-coated diamonds was improved from 804 to 996 MPa with the increased coating time. The energy dispersive spectroscopy scanning indicated that the Mo 2 C coating layer changed the interfacial composition between the matrix and the diamonds from Fe–C alloy to Mo 2 C, improving the interface strength. Moreover, the diamond protrusion heights of composites were raised by adding a Mo 2 C interface, resulting in an improvement in the cutting efficiency of impregnated diamond tools.
研究领域:
材料科学
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机械工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Mingkai Liu,Zihan Wan,Yunlian Liu,Qian Jia,Ruqi Zhang,Yang Li,Ying Pan,Hongguang Jin
Hydrogen production is crucial for supporting the energy transition and achieving carbon neutrality goals. However, conventional natural gas steam reforming suffers from high temperatures, which lead to substantial exergy losses, promote carbon deposition, and compromise operational stability. Here, a mid-temperature (500–600 °C) chemical looping steam reforming (CLSR) process is proposed for efficient natural gas conversion. Fe Ni oxygen carrier particles were developed by varying Fe/Al precursors, calcination temperatures, and powder sizes to achieve modulated physico-chemical properties. Systematic evaluation of chemical reactivity and physical indicators identified nm-Fe 2 O 3 -γ-Al 2 O 3 calcined at 1200 °C as the optimal formulation, combining high reactivity with a mechanical strength of 55.3 N. Reaction behavior was further investigated in a bench-scale packed-bed reactor with 100 g oxygen carrier loading. At 600 °C and a steam-to‑carbon ratio of 1.5, the optimized process achieved over 85 % natural gas conversion and nearly 100 % ethane conversion, yielding a hydrogen production of 25 mL g OC −1 and an H 2 /CO ratio of 1.8. In addition, long-term stability tests confirmed that the oxygen carriers retained their oxygen transfer capacity and microstructure after 1000 isothermal redox cycles, while cold attrition tests showed a mass loss of only 0.73 % over 2 h. Furthermore, in-situ DRIFTs and XRD provided clear mechanistic insights into the CLSR process over Fe Ni oxygen carriers, confirming the reaction pathway of natural gas activation and hydrogen production. Collectively, these findings highlight the promising performance of CLSR as an efficient route for low-carbon hydrogen production from natural gas.`.
研究领域:
能源化学
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催化化学
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材料科学
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化学工程
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清洁能源技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Chenyu Song,Jishuang Yang,Chinnadurai Ayappan,Shree Kesavan Kannan,Haitang Yang,Ruimin Xing,Hongxun Yang,Shanhu Liu
The large-scale application of water electrolysis technology is limited by the slow kinetics of the oxygen evolution reaction (OER) that cause vast energy loss. Rational design and construction of hierarchical heterostructures are helpful for developing efficient OER electrocatalysts due to their interesting morphological features and electrochemical properties. Herein, we prepared hierarchical CoS 2 @(Fe,Ni)S 2 heterostructures on carbon fiber paper (CoS 2 @(Fe,Ni)S 2 /CFP) with particle-on-wire morphology using prussian blue analogue as template and precursor. The unique hierarchical heterostructure maximizes accessible active sites and the synergistic effect between different components significantly improves electrocatalytic activity. Impressively, CoS 2 @(Fe,Ni)S 2 /CFP electrocatalyst requires a small overpotential of 237 mV to achieve a current density of 20 mA cm −2 with a low Tafel slope of 54 mV dec −1 and the corresponding voltage has no obvious change after 60 h stability test under a constant current density of 50 mA cm −2 in 1 M KOH solution. This work provides a new idea for the design of efficient and stable non-noble metal-based OER electrocatalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Weiju Hao,Dongxue Yao,Qiuyu Xu,Ruirui Wang,Chenglong Zhang,Yanhui Guo,Ruimin Sun,Mingxian Huang,Ziliang Chen
The aggregation of transition metal nanoparticles severely degrades their catalytic activity towards water splitting. Although this issue can be alleviated by the popular carbon-hybridization and metal foam-confinement strategies, the complicated fabrication procedure and the support corrosion parasitic in these strategies inevitably result in high usage cost and unsatisfactory cycle durability. Herein, we in-situ space-confined boron-inserted Fe-Ni solid solution nanosheets onto the activated hydrophilic sponge (B-FeNi@HS) via substitution of Fe by Ni and insertion of B within the Fe lattice interstitials in the presence of NH 4 + -modified dimethylamino borane solution. When served as the bifunctional electrocatalysts, B-FeNi@HS only needs overpotentials of 54 and 171 mV to afford 10 mA cm –2 for HER and OER in 1.0 M KOH, respectively. In addition, the alkaline overall-water splitting system constructed by using B-FeNi@HS as two-electrodes only delivers an ultralow cell voltage of 1.456 V to drive 10 mA cm –2 , and shows negligible activity decay even at 500 mA cm –2 for 3 days. Such outstanding performance can be traced to the synergism of corrosion-resistant support, hierarchical morphology with favorable surface area and dual solid-solution crystal structure, ensuring robust mechanical stability, rapid charge/mass transfer kinetics as well as the energetically favorable formation of intermediates during catalysis. The proposed strategy is versatile and can be extended to synthesize other efficient B-inserted Fe-based electrocatalysts.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·404
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IF 38.5
Zhang Yifan,Kong Kexin,Jie Hongyuan,Jin Xiaoyan,Tian Long,Liu Yipu,Pan Zhijuan,Hwang Seong-Ju,Li Liang,Wang Zhe
Dual-atom catalysts (DACs) show great promise in catalyzing oxygen reduction/evolution reactions (ORR/OER), yet facing significant challenges in achieving simultaneous high catalytic activity and stability in zinc–air batteries (ZABs). In this study, we synthesized a porous three-dimensional carbon aerogel anchored with atomically isolated FeN4/NiN4 dual sites and Ru6 nanoclusters (FeN4–Ru6–NiN4@PCA) to address these challenges. The adjacent Ru6 nanoclusters effectively regulate the geometric structures of FeN4 and NiN4 sites and catalyze the formation of a highly graphitic carbon matrix. These structural features endow FeN4–Ru6–NiN4@PCA with remarkable ORR/OER activity and stability, outperforming counterparts with only FeN4/NiN4 dual species and benchmark Pt/C and RuO2 catalysts. Density functional theory calculations reveal that Ru6 clusters induce obvious electron redistribution of FeN4/NiN4 sites and optimize their electron transfer to the key oxygen intermediates (OH*) at the rate-determining steps, thereby accelerating the ORR and OER kinetics. When employed FeN4–Ru6–NiN4@PCA as the cathode catalyst in ZABs, the resulting ZAB delivers a peak power density of 197.76 mW cm–2 and demonstrates outstanding cycling stability over 2000 h, highlighting its great potential for use in applications of energy storage device.
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DOI
PubMed
高影响因子
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