Catalysis Science & Technology
·
2025
·
IF 4.2
Yifan Zhang,Jiaying Liu,Shiwei Wang,Zhihao Yu,Haojian Zhang,Dong Wang,Lin Zhu,Chunzheng Wu,Hongbo Yu
Modifying noble metal catalysts with transition metal oxides (MO x ) can markedly enhance catalytic performance through synergistic effects, yet precise spatial colocalization of active metal and promoter phases remains challenging. Here, we report the synthesis of KIT-6 supported Pd-MO x (M = Fe, Co, Ni) hybrid nanostructures via in situ transformation of bimetallic PdM nanoparticles under controlled thermal conditions. The resulting Pd-MO x /KIT-6 catalysts displayed superior activity and selectivity in the selective hydrogenation of acetophenone to 1-phenylethanol compared with monometallic Pd/KIT-6. Among them, Pd-CoO x /KIT-6 (Pd/Co=1:1) achieved the highest performance, with 99.7% acetophenone conversion and 98.2% selectivity, and demonstrated broad applicability for hydrogenating diverse ketones. Structural and kinetic studies revealed that interfacial Pd-CoO x sites play a pivotal role: Pd domains efficiently dissociate H 2 , while CoO x species enhance acetophenone adsorption. This synergistic interface-driven mechanism provides a general and costeffective strategy for the selective hydrogenation of multifunctional substrates.
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Mengjie Cao,Shuangde Li,Shikun Wang,Xin Zhou,Guangxin Ma,Yunfa Chen
The catalytic decomposition of CH4 offers a promising route to obtain pure H2, which is significant for mitigating greenhouse gas emissions and enhancing methane utilisation. Nickel-based catalysts are the most prevalent for methane cracking. However, catalyst deactivation can occur due to coking and sintering. Therefore, stabilising the active sites of Ni-based catalysts by enhancing metal–support interactions is essential for designing methane cracking catalytic systems. This study investigates the effects of adding Co, Cu and Zn on the performance of a hydrotalcite-derived NiCrAl catalyst. The results showed that Cu increased the specific surface area, decreased the electron density around Ni atoms, facilitated the reduction of NiO, and produced strong interactions between the metal and support. This improved methane decomposition at the Ni active sites and enhanced catalytic stability. The strong interaction between the metal and support suppressed nickel sintering during methane cracking. The Ni2.4Cu0.3Cr0.3Al catalyst retained 50% H2 yield for 400 min at 650 °C. Online mass spectrometry analysis demonstrated that the catalyst did not generate CO and CO2 during the methane cracking reaction. XRD and TEM results showed that Cu maintained the balance between CH4 dissociation and carbon diffusion by stabilising the size of nickel, promoting the transition of deposited carbon from carbon particles to carbon nanotubes. This work provides a reference for designing high-performance nickel-based catalysts for methane cracking.
研究领域:
催化化学
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能源材料
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纳米材料科学
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环境化学
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化学工程
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DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2018
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IF 2.631
Jun Wang,Deyan Wang,Chunxiang Huang,Xueni Sun,Xiaoyong Yue,Hui Shao,Yixin Leng
Isobaric vapour–liquid equilibrium (VLE) data for two binary systems of p-Cresol (PC) + diethanolamine (DEA) and m-Cresol (MC) + DEA were measured at 20.0 kPa. The Herington area method was used to check the binary VLE data, and the results showed good thermodynamic consistency. Meanwhile, the Wilson, NRTL, UNIQUAC models and the chemistry theory proposed by Dolezalek were used to correlate the VLE data. The binary energy interaction parameters for activity models, and reaction equilibrium constants for chemistry theory were obtained. With help of the parameters obtained in this work, the NRTL model was used to predict the VLE data of the two binary systems at the pressure of 8.33 kPa. The predictive results were compared with the literature’s data. At same time, the excess Gibbs free energy for the two binary systems, and infinite dilution activity coefficients for MC and PC in DEA were estimated. The calculated results showed that the DEA had slightly stronger interaction with PC than MC.
研究领域:
化学工程
·
热力学
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DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 45
·5380-5386
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IF 2.073
Hong Zhai,Yunfeng Bai,Haiqing Wang,Jun Qin,Huijun Liu,Feng Feng
m-Dihydroxybenzene (mDHB) was used as a potential fluorophore for the first time to develop a new fluorescence ratiometric sensor with carbon dots (CDs) for glucose detection. mDHB itself cannot fluoresce, but its oxide can produce fluorescence and also quench the fluorescence of CDs. Using this characteristic of mDHB, we introduced two tandem enzyme catalytic oxidation reactions (catalysed by glucose oxidase and horseradish peroxidase) to quantitatively form mDHB oxide. Glucose was oxidized by oxygen to form hydrogen peroxide under the catalysis of glucose oxidase, and then hydrogen peroxide was used to quantitatively oxidize mDHB by the catalysis of horseradish peroxidase, so mDHB oxide was quantitatively related to glucose. Furthermore, the resulting mDHB oxide can cause changes in the fluorescence ratios of CDs and mDHB oxides. Therefore, glucose can be detected by the fluorescence ratio. The results showed that glucose content had a good linear relationship with the fluorescence ratio of mDHB oxide and CDs, and the detection limit can reach 0.35 μM. The strategy was simple and cost-effective as no chemical synthesis, modification and separation procedures were involved, which can open up a new avenue for glucose detection.
研究领域:
分析化学
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生物化学
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材料科学
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DOI
高影响因子
FOOD CHEMISTRY
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2026
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IF 10.4
Xiang Luo,Yang Wang,Man Zhou,Qiaolan Sun,Xue Wang,Xiaojie Yu,Li Chen,Hua Yang,Cunshan Zhou
Rebaudioside M is a desirable zero-calorie sweetener, but its low natural abundance limits industrial application. Here, enzymatic conversion of Rebaudioside D was intensified through host engineering, cascade biocatalysis, and substrate feeding. Expression of the glycosyltransferase in a eukaryotic host increased the soluble enzyme fraction from 18% to 92% and improved specific activity by 1.46-fold compared with the bacterial system. Coupling with sucrose synthase enabled in situ regeneration of the sugar donor from inexpensive sucrose. Kinetic analysis identified substrate depletion as the dominant bottleneck in batch reactions. A fed-batch feeding strategy increased the product titer to 28.38 g L −1 with 91.6% conversion, representing a 3.99-fold improvement over batch mode. This integrated strategy provides a practical basis for cost-efficient production of next-generation natural sweeteners.
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 9
Houkang Pu,Hanjing Xue,Xiaojuan Wang,Xiaolai Zhang,Xinyan Wang,Weizheng Zhang,Yan Zhang,Congjie Gao,Xueli Gao
The utilization of colloidal polymers to regulate interfacial polymerization (IP) kinetics allows for the controlled design of thin-film nanocomposite (TFN) reverse osmosis (RO) membrane structures. However, inadequate interfacial compatibility between the polymer and polyamide (PA) matrix can negatively affect the membrane's fine structure. In this study, the oxidative properties of metal salt ions (M = Cu 2+ , Pd 2+ , Pt 4+ , Ag + , Ir 3+ , Fe 3+ , Ni 2+ , Co 2+ , Mn 2+ ) were ingeniously employed to induce in-situ oxidative self-polymerization of a small amount of reactive amine monomers ( m -phenylenediamine, MPD) in aqueous phase solution, resulting in the formation of poly( m -phenylenediamine)-metal (PMPD-M) colloidal polymer. The in-situ formed colloidal polymers enhanced the adsorption and storage of residual amine monomers and optimized the spatial-temporal distribution of MPD at the aqueous-organic phase interface. The hydrogen bonding between the polar-rich PMPD-M polymer and MPD restricted the diffusion of MPD from the aqueous phase to the organic phase, leading to a decrease in the intrinsic thickness of PA layers and a reduction in transmembrane mass transfer resistance and water molecule transport pathways. Moreover, the amino-rich PMPD-M polymer significantly enhanced interfacial compatibility with the PA matrix, ensuring the high desalination performance of RO membranes. In the brackish water application test, the TFN-Fe 2 membrane exhibited the highest water permeance (2.72 L m −2 h −1 bar −1 ) and satisfactory salt rejection (99.30 %). The proposed in-situ oxidative self-polymerization strategy for monomers is anticipated to stimulate the development of various colloidal polymers in water treatment and even gas separation membrane technologies.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Le Ruan,Zhe Zhang,Xiaodong Huang,Yuzeng Lyu,Yuqing Wen,Wei Shang,Ling Wu
The corrosion behavior of aromatic aldehyde Schiff bases self-assembled (SA) films on carbon steel (CS) surface was measured by electrochemical impedance spectroscopy (EIS) and polarization curves with different immersion time. The results showed that after assembling in two Schiff base solutions for 12 h, the corrosion efficiency of the SA films on CS surface reached 92.80% and 93.66%, respectively. Scanning electron microscopy (SEM) micrographs showed that the SA films can prevent CS corrosion in HCl solution. The quantum chemical calculations and dynamic simulations were employed for investigation of the inhibition mechanism.
研究领域:
材料腐蚀与防护
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表面科学
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电化学
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金属材料学
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物理化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Ziyu Huang,Yifu Chen,Qingyue Han,Miaomiao Su,Yangxi Liu,Suqing Wang,Haihui Wang
A separator plays a vital role in the performance and safety of lithium-ion batteries. The modification of the commercial polyolefin separators is the most practical way to overcome the low thermal stability and electrolyte wettability problems. Herein, we propose a simple vapor-induced phase inversion method to fabricate poly (m-phenylene isophthalamide) (PMIA) modified polyethylene (PE) separator (referred to PE@PMIA). During the phase inversion process, the porous PMIA layers are formed on both sides of the PE separator and the thickness of the whole modified separator is only 13 μm. Due to the introduction of the PMIA protective layers with high heat-resistant, the obtained PE@PMIA displays enhanced thermal stability, showing no dimension shrinkage after heat treatment at 150 °C for 30 min. The PE@PMIA separator also exhibits excellent electrolyte affinity, enhanced mechanical property, and excellent lithium dendrite resistance for batteries' superior safety. The assembled LiFePO 4 /Li cells using PE@PMIA separators show great cycling performances and good rate capability. These results demonstrated that the PE@PMIA separators are promising for high-performance lithium-ion batteries and the vapor induced phase inversion method could be extended to fabricate other modified separators.
研究领域:
材料科学
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储能技术
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高分子化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 7
·10499-10505
·
IF 5.532
Xiang Yu,Lichen Wang,Ruoshui Liu,Ningfang Zhou,Zhiyi Xu,Huayang Gong,Tongyun Zhao,Jirong Sun,Fengxia Hu,Baogen Shen
We synthesized Sr 1- x Nd x Fe 12- y Co y O 19 ( x = 0–0.25, y = 0–0.1) using a conventional ceramic route. The crystal structures were analyzed using X-ray diffraction. With increasing Nd 3+ and Co 2+ contents, lattice constant a increases, while lattice constant c decreases. In terms of magnetic properties , the saturation magnetization and coercivity are simultaneously increased when x = y = 0.1 (equal co-substitution). This is mainly because the bivalent Co 2+ has a smaller magnetic moment and unquenched orbital moments. When substitution amount x is further increased (unequal co-substitution), the magnetic properties are further improved and reach the optimum values of M s = 76.4 emu/g and H c = 5115 Oe owing to the occupation of the 2 a site by divalent Fe 2+ . The occupancies of Co 2+ and Fe 2+ are further verified using Raman spectroscopy .
研究领域:
材料科学
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磁学与磁性材料
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陶瓷学
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固态化学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
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2023
·
IF 3.6
Lin Xiang,Xianju Zhou,Li Li,Faling Ling,Yanhong Li,Jingfang Li,Hongmei Yang
Eu 3+ ions are extensively employed as spectroscopic probes because of the particular emissions due to the unique 4f 6 electronic configuration. Herein, we have developed a series of interesting fluorescent powders of Eu 3+ activated Sr 2 MNbO 6 (M = Ga, In, Gd). When Sr 2 GaNbO 6 :Eu 3+ is excited by the photons in the range of charge transfer band (CTB), the dark red 5 D 0 → 7 F 4 transition predominates the emission, exhibiting an anomalous intensity even higher than that of 5 D 0 → 7 F 1 or 5 D 0 → 7 F 2 . Whilst, if the sample is pumped by f-f characteristic transitions, the hypersensitive 5 D 0 → 7 F 2 transition emerges as the strongest. However, Eu 3+ doped Sr 2 InNbO 6 and Sr 2 GdNbO 6 never demonstrate such results, 5 D 0 → 7 F 1 acts as the most intense one regardless of the excitation wavelength. It is found that Eu 3+ substitutes Sr 2+ site, and cuboctaherdron [SrO 12 ] with O h symmetry is likely to deform to triangular orthobicupola D 3h symmetry, leading to two non-equivalent crystal sites in Sr 2 GaNbO 6 host. But Eu 3+ replaces In 3+ and Gd 3+ position with O h symmetry and has only one site in Sr 2 InNbO 6 and Sr 2 GdNbO 6 . Based on the comparative study on the intensity of 5 D 0 → 7 F 0 transition, as well as the influence factors of temperature, the doping concentration on the relative intensity among 5 D 0 → 7 F J transitions, and the band gaps of these three hosts, the origin of the abnormal intense 5 D 0 → 7 F 4 is ascribed to the mixing of CTB and low-lying 4f 6 configuration as well as two non-equivalent Eu 3+ sites.
研究领域:
材料科学
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光物理学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Xiaohan Jin,Jingbao Wang,Siyuan Zheng,Jianan Li,Xuemei Ma,Li Feng,Hailin Zhu,Zhiyong Hu
Three triazine-based surfactants with different hydrophobic chain lengths were synthesized and characterized, namely, 2-(n-Hexylamino)-4,6-bis (3-N, N-dimethylaminopropyl) amino-1,3,5-triazine, 2-(n-Octylamino)-4,6-bis (3-N, N-dimethylaminopropyl) amino-1,3,5-triazine and 2-(n-n-Dodecylamino)-4,6-bis (3-N, N-dimethylaminopropyl) amino-1,3,5-triazine, labelled C 6 , C 8 and C 12 respectively. The chemical structure was confirmed by FTIR and 1 H NMR. The surface activity was evaluated by surface tension. C 12 had a lower critical micelle concentration (CMC) value (0.5 mM) than C 6 and C 8 , which suggested that a lower concentration was required to reach interfacial adsorption saturation, representing better inhibition performance. The corrosion inhibition of surfactants for 45 # carbon steel in 1.0 M HCl was studied by static weight loss measurement, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization. Inhibition results showed that C 12 was better than C 6 and C 8 with the maximum inhibition efficiency of 96% at 0.1 mM. The surface analysis had given a clear view of the mechanism of surfactants in inhibiting the corrosion process. Moreover, the Freundlich adsorption isotherm was the best description for the adsorption process of surfactants on 45 # carbon steel in 1.0 M HCl.
研究领域:
材料科学
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腐蚀与防护
·
表面化学
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DOI
高影响因子
SOLID STATE SCIENCES
·
2023
·
IF 3.5
Ningxia Li,Qi Luo,Meiyan Cui,Zhiying Zhao,Zhangzhen He
New fluorophosphate compounds H A 5 M 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb; M = Fe, Ga) were synthesized by a fluorine-rich hydrothermal method . These compounds crystallize in the monoclinic system with a P2 1 /n space group, exhibiting an open framework structure built by [PO 3 (OH)] groups, [MO 4 (OH)F], and [MO 4 F 2 ] octahedra, where ten-membered-ring channels, eight-membered-ring channels, six-membered-ring channels, and the linear M 3+ trimers are seen. The characterizations were carried out by powder XRD , EDS , FT-IR spectra, and magnetic measurements. The results confirmed that H A 5 Fe 6 (OH) 4 F 4 (HPO 4 ) 8 ( A = K, Rb) show a quite similar magnetic behavior, possessing an antiferromagnetic ordering at 14.7 K and 15.6 K, respectively. The changes of the magnetic entropy for such antiferromagnetic orderings can be estimated as ∼10.7 J mol −1 K −1 and ∼13.4 J mol −1 K −1 .
研究领域:
无机化学
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材料科学
·
固体化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）