FUEL
·
2023
·
IF 7.4
Muhammad Yousaf,Yuzheng Lu,Majid Niaz Akhtar,Ali Sarosh Khawaja,Khalid Mujasam Batoo,Sajjad Hussain,Asma Noor,Muhammad Akbar,Hu Enyi,M.A.K Yousaf Shah,Naveed Mushtaq,Bin Zhu
Lattice defects in rare earth (RE) doped single-phase semiconductor materials play a key role in structural modifications and physicochemical characteristics, resulting to enhance the ionic conductivity. In this work, we synthesized lanthanum doped samarium oxide with different mole ratios and applied it as a ceramics membrane fuel cell device to enable high peak power density (PPD) at low operational temperatures (520–400 °C). The samples are capable of triple charge H + /O 2− /e − conduction and enhance the catalytic function of the cell in terms of HOR and ORR kinetics by producing lattice defects. The fabricated Sm 1.5 La 1.5 Fe 5 O 12 (2-SLFO) fuel cell device exhibits a high OCV of 1.13 V with a maximum PPD of 864.26 mW/cm 2 at 520 °C. Durability measurement verifies that 2-SLFO-based fuel cell device can be worked for 60 h under fuel cell conditions (H 2 /air) at 520 °C. The first principle calculations using density functional theory (DFT) demonstrate that the higher oxygen vacancy concentration in the 2-SLFO sample may cause to the higher charge-transfer kinetics, subsequent in the enhancement of ions transportation of the fabricated fuel cell device.
研究领域:
材料科学
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电化学
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能源材料
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固态离子学
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燃料电池技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chia-Tse Lee,Haoyuan Zheng,Chen Jin,Hang Che,Li Wang,Yuyuan Zhao,Shixuan He,Xinhua Wang,Yifeng Yu,Mi Yan
Metal nitrogen hydride (Li-Mg-N-H) is regarded as an ideal hydrogen storage material for automotive applications due to its advantages of high hydrogen storage capacity (5.6 wt%), low operating temperature, and good cycling performance, but the comprehensive hydrogen storage performance of this material still could be improved. For this reason, this paper constructed a Li-Na-Mg-N-H composite system by synthesizing NaMgH 3 to replace MgH 2 in the Li-Mg-N-H system. The improvement of the hydrogen absorption and desorption properties of the composite system after the replacement of MgH 2 by NaMgH 3 was investigated. Various properties and test results showed that the composite system after the replacement of MgH 2 by NaMgH 3 showed better hydrogen absorption and desorption properties. The initial/peak hydrogen release temperatures of Li-Na-Mg-N-H decreased from 135 ˚C/245 ˚C to 105 ˚C/145 ˚C, and the apparent activation energy of hydrogen release was reduced from 114.90 to 104.05 kJ/mol which means the kinetics of hydrogen absorption and desorption was greatly improved. The mechanism study shows that NaMgH 3 will react with LiNH 2 and forms the intermediate product Li 3 Na(NH 2 ) 4 during the hydrogen release process, which changes the hydrogen desorption pathway of the composite system and thus the hydrogen absorption and desorption kinetics were improved.
研究领域:
材料科学
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氢气储存
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能源材料
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固态化学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Mengfei Zhu,Yuepeng Pang,Fuqiang Lu,Xinxin Shi,Junhe Yang,Shiyou Zheng
Li–B–H complexes facilely prepared via partial dehydrogenation of LiBH4 are presented in this study as solid electrolytes for Li batteries. An exceptionally high Li-ion conductivity is found for the Li–B–H complex with 7.5 wt % H2 desorption under 3 bar H2 pressure, which reaches 2.7 × 10–4 S cm–1 at 35 °C, more than 4 orders higher than that of LiBH4. In-depth characterizations show that LiH and [Li2B12H11+1/n]n are in situ formed in the LiBH4 matrix and the interface layer between [Li2B12H11+1/n]n and LiBH4 is believed to be responsible for the high Li-ion conductivity. Moreover, this Li–B–H complex also exhibits excellent electrochemical stability, which enables the stable cycling of all-solid-state batteries at room temperature.
研究领域:
材料科学
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储能
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固态化学
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电化学
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DOI
高影响因子
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
·
2015
·Vol. 2016
·期 2
·325-330
·
IF 3.065
Wannian Zhao,Lei Xu,Yingcai Ding,Ben Niu,Ping Xie,Zhaogang Bian,Denghong Zhang,Aihua Zhou
Coumarin derivatives are highly valuable compounds in drug discovery. Herein, we have developed two new coupling reactions that involve coumarins and either aldehydes or di- tert -butyl peroxide (DTBP) in the presence of inexpensive copper or iron catalysts. Both of these reactions proceed through a C(sp 2 )–H functionalization process to regioselectivity generate keto- or methyl-substituted coumarin derivatives in moderate to good yields These coupling reactions will enrich current coumarin chemistry. Graphical Two coupling reactions that regioselectively yield either keto- or methyl-substituted coumarin derivatives by proceeding through a C(sp 2 )–H functionalization process were successfully developed. The coupling of coumarins with either aldehydes or di- tert -butyl peroxide (DTBP) generated the corresponding products in moderate to good yields.
研究领域:
有机化学
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药物化学
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合成方法学
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催化
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DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Kudakwashe Meki,Shiyu Meng,Zihao Liu,Zhuowen Wang,Baojian Jing,Huiqun Zhang,Peng Liu,Shan Qiu
DMS gradient improves micropore access and O₂ transport, reducing flooding. • CB-DV06 yields 750 mg L −1 H₂O₂ at >60% Electro-Fenton efficiency. • DMS-modified GDEs remove 85% RBB and reduce TOC 60% in 120 min. • Surface area reaches 222.9 m 2 /g; electroactive sites increase sixfold. • Dual-phase oxygen diffusion boosts ORR kinetics and degradation rate. Hydrogen peroxide (H₂O₂) electrosynthesis via the two-electron oxygen reduction reaction (2e − ORR) is critically dependent on the formation of stable and well-regulated triple-phase interfaces (TPIs), where gas, liquid, and catalyst converge. However, micropore flooding and uneven wettability in carbon-black gas diffusion electrodes (GDEs) often hinder oxygen transport and deactivate active sites. In this work, we address these challenges by introducing a dimethyl silicone oil (DMS) volume-gradient strategy to engineer confined TPIs within the carbon catalyst layer. Carbon-black GDEs were prepared using DMS volume-controlled of 0.4, 0.6, and 1.2 mL, with CB-DV06 identified as the optimum configuration. This design balances hydrophobicity and pore accessibility, promoting sustained oxygen diffusion and suppressing water blockage without impeding electron or ion transport. The optimized GDE (CB-DV06) achieved ~750 mg L −1 H₂O₂ after 180 min with current efficiencies exceeding 60% and enhanced electrochemically active surface area. To demonstrate the practical applicability of the in situ generated H₂O₂, Reactive Black B (RBB) degradation was employed as a model pollutant-removal reaction. The integrated system achieved approximately 85% RBB decolourisation, demonstrating the applicability of this interface-engineering strategy for pollutant-removal applications. Overall, this study highlights a low-impact approach for optimizing oxygen reduction environments in porous electrodes, advancing sustainable oxidant generation and environmental remediation. Download: Download high-res image (127KB) Download: Download full-size image
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Shuai Han,Cai Xu,Jun Li,Jia Guo,Jianhai Yang,Xiaozhong Wang,Liyan Dai
The selective C−H bond oxidation of toluene to benzaldehyde using molecular O2 with non-noble metal catalysts is challenging but desirable. Herein, a series of high-entropy oxides (FeCoNiCrMn)3O4 supported on mesoporous N-doped carbon was fabricated via a reverse impregnation and calcination method (denoted as HEOs@NC). It was found that high-entropy oxides (FeCoNiCrMn)3O4 nanoparticles were distributed well onto the surface of N-doped carbon, and a distinct interface between them was observed, contributing to the formation of metal-support electronic interaction. XPS and Bader charge results verified that an electron was transferred from (FeCoNiCrMn)3O4 to N-doped carbon. Under the optimized reaction conditions, 12.2% of toluene conversion and 2.0 ×10−4 mmol mg−1cat. h−1 of benzaldehyde formation rate could be obtained with 1.5HEOs@NC catalyst. Moreover, DFT calculations revealed that the supported (FeCoNiCrMn)3O4 displayed stronger adsorption ability toward N-hydroxyphthalimide, and the formation of *PhCH2OH was determined as the rate-determining step. A lower energy barrier was achieved over the supported HEOs owing to the interfacial interaction between (FeCoNiCrMn)3O4 and N-doped carbon. This work developed a supported high-entropy oxides catalyst by rational design of interfacial engineering for the aerobic C−H bond oxidation of toluene.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 10
·e70655
·
IF 4.3
Xiaoju Liu,Sunqiu Fan,Shijin Hu,Zeyu Ye,Xiaoyan Ma,Guoxiong Wang,Xiangrong Ma
Two novel trinuclear ferrocenyl coordination compounds, Fc 3 N 4 /Fe and Fc 3 N 4 /Co, were synthesized as burning-rate catalysts for ammonium perchlorate (AP). The trinuclear architecture, featuring a nitrogen-rich ligand bridging three ferrocene units with transition metal centers, was designed to enhance multi-site electron transfer and thereby promote catalytic performance. At 3 wt% loading, Fc 3 N 4 /Co reduced AP's high-temperature decomposition temperature by 126°C, decreased the apparent activation energy by 74.0 kJ · mol −1 , and increased heat release by 718 J · g −1 , outperforming the corresponding mononuclear analogues and commercial binuclear ferrocene catalysts. Structural characterization (XRD, BET, XPS) and DFT calculations suggest that the superior catalytic activity arises from synergistic Co–Fe electronic modulation that facilitates N–H and Cl–O bond activation, together with a high specific surface area (310.6 m 2 · g −1 ) that provides abundant active sites. This work establishes trinuclear ferrocenyl coordination compounds as a promising platform for high-performance burning-rate catalysts in composite solid propellants.
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DOI
高影响因子
NANO
·
2026
·
IF 1.3
Weifeng Chen,Dandan Han,Zhiwei Huang,Xuan Tian,Ting Xiao,Yizhu Lei
Ice accretion severely compromises infrastructure safety and efficiency. While integrating photothermal function with superhydrophobicity offers a promising solution, achieving this synergy within a mechanically robust coating remains challenging. Herein, we present a superhydrophobic nanocomposite coating fabricated by embedding multi-walled carbon nanotubes (MWCNTs) and hydrophobic silica (H-SiO 2 ) in an organosilicon polymer (OSP) matrix. The OSP/MWCNT/H-SiO 2 coating exhibits good mechanical durability, maintaining superhydrophobicity after severe water and sand impact, owing to the reinforced composite structure. Crucially, the design yields a remarkable photothermal conversion efficiency, achieving a temperature rise of 85 °C under 1.0 kW·m −2 irradiation. This photothermalsuperhydrophobic synergy enables outstanding anti-icing performance, delaying ice formation for over 578 s at -20 °C, and efficient solar-driven de-icing (complete melting within 462 s). Successfully demonstrated on insulators, our coating offers a viable dualfunctional platform to address icing challenges in practical settings.
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DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Qian Zhou,Ran Feng,Chen-Chen Wang,Si-Jie Wu,Qiu-Ya Ji,Ran Meng,Bao Zhang
Nanoparticles are successfully constructed by a green H₂O₂ oxidation strategy. • Formation entails EGCG oxidation, Mannich cross-linking and H-bonding/π-π stacking. • Nanoparticles show excellent antioxidant activity and enhanced stability. • The greater the number of hydroxyl groups, the stronger the interaction force. This study developed a green, carrier-free EGCG-flavonoid nanoparticle assembly strategy driven by H₂O₂. This approach overcomes the drawbacks of traditional formaldehyde-induced methods, including solvent toxicity and poor biocompatibility. It further investigated how the number of flavonoid hydroxyl groups regulates the assembly process and properties of EGCG-flavonoid nanoparticles. The formation involves H₂O₂-mediated oxidation of EGCG hydroxyl groups to generate aldehyde and carboxyl groups, which then undergo covalent bonding with the amino group of glycine. Flavonoids are embedded into the EGCG–glycine network through noncovalent interactions, resulting in spherical nanoparticles (200–260 nm, PDI ≈ 0.3). Increasing hydroxyl groups on flavonoids enhanced their loading capacity and interaction with EGCG. Nanoparticles with polyhydroxylated flavonoids exhibited strong antioxidant activity (>85% DPPH•/ABTS• + scavenging), high storage stability (>70% retention after 60 days), and improved thermal stability. This work provides a theoretical foundation for green synthesis of polyphenol-flavonoid nanosystems in functional foods and targeted delivery. Download: Download high-res image (114KB) Download: Download full-size image
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DOI
PubMed
高影响因子
Vaccines
·
2026
·Vol. 14
·期 7
·581
·
IF 3.5
Ren Yang,Xiaohong Wu,Xiaowei Zhang,Shengqing Fu,Kaiping Gu,Zhe Lv,Xiaoli Li,Qunying Mao
Background:The m7G cap structure, which mimics the natural cap of eukaryotic mRNA, is a critical determinant of mRNA vaccine efficacy, safety, and stability. However, its precise quantification remains challenging due to complex impurity profiles and the high physicochemical similarity between the target cap and related impurities. Although liquid chromatography mass spectrometry (LC-MS) is widely employed for this purpose, current methodologies still face significant limitations, including labor-intensive sample preparation, low analytical throughput, poor reproducibility in quantifying low-level impurities, and a lack of universally applicable strategies across diverse mRNA vaccine platforms.Methods: We systematically optimized sample preparation and LC-MS detection workflows. RNase H-mediated cleavage was compared with DNAzymes, guide DNA probes were rationally designed, and thermostable RNase H was introduced for one-step denaturation and cleavage. To establish an accurate, efficient, and universal sample preparation workflow. Chromatographic conditions were optimized using an ion-pairing reagent system to suppress ESI-MS metal adducts. Eliminating sample purification improves recovery, reduces manual handling errors, and boosts assay efficiency.Results: Through optimally designed guide DNA probes, RNase H cleavage specificity reached ≥98% with high cleavage efficiency, offering higher efficiency than DNAzyme. Furthermore, the incorporation of thermostable RNase H enabled a single-step workflow combining high-temperature denaturation and site-specific cleavage, substantially streamlining sample preparation. On the chromatographic side, optimization of the ion-pairing reagent system effectively suppressed metal adduct formation in electrospray ionization mass spectrometry (ESI-MS). This advancement enabled direct injection of the 5′ cap fragments without purification, achieving high-recovery quantification while demonstrating broad compatibility across mainstream LC-MS platforms. The optimized assay reduces the total analytical workflow from 4~6 h to under 1.5 h.Conclusions:Combining high accuracy, robustness, and broad platform compatibility, this method offers a universal, high-throughput analytical solution for mRNA vaccine quality control and continuous process development.
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DOI
高影响因子
Green Carbon
·
2026
·
IF 14.2
Shihao Li,Xiaoyang Yue,Fei Huang,Qian Zhang,Xiao Huang,Jingjing Zhao,Luwei Bao,Yanjun Jiang
Unspecific peroxygenases (UPOs) enable the selective hydroxylation of inert C–H bonds using H 2 O 2 under mild conditions. However, their practical application is fundamentally limited by oxidative deactivation at elevated H 2 O 2 concentrations. Herein, a highly synergistic photobiocatalytic system is constructed by covalently immobilizing UPOs onto a Rh-complex-coordinated covalent organic framework (COF) to facilitate the in-situ generation of H 2 O 2 and sequential enzymatic utilization. Specifically, a COF featuring a pyridinic imine structure (COF PyIm ) is designed to precisely anchor Rh(III) complexes. Compared with its bipyridine-structured analog (COF Bpy ), COF PyIm provides more coordination sites and a shorter electron-transfer distance. Consequently, the photocatalytic H 2 O 2 synthesis rate reached 22.17 mM·g -1 ·h -1 , representing a performance improvement of approximately 40%. This enhancement is attributed to the optimized pyridine–imine coordination microenvironment, which promotes charge separation and electron transfer. Subsequently, UPO from Agrocybe aegerita ( Aae UPO) is covalently immobilized onto COF PyIm to yield Aae UPO@Rh-COF PyIm , which achieves efficient spatiotemporal coupling between in situ H 2 O 2 generation and enzymatic hydroxylation of the C–H bond. This integrated photobiocatalyst can achieve 90% yield, >99% enantiomeric excess ( ee ), and a turnover number of 41,666 in the asymmetric hydroxylation of ethylbenzene. It also exhibits excellent reusability (retaining 70.4% of its initial activity after six cycles) and broad substrate scope.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Qunfang Lin,Zeyang Li,Zeyuan Zhang,Zhikang Chen,Changxi Yu,Siguo Xiao,Kailing Sun,Tongye Wei
Aqueous aluminum–ion batteries (AAIBs) have attracted considerable attention owing to their high theoretical capacity, high safety, and low cost. However, as a strong Lewis acid, Al 3+ readily coordinates with the lone–pair electrons of water molecules, which significantly polarizes the O H bonds and promotes water dissociation and proton generation. The generated protons can cause severe corrosion of electrode materials, thereby limiting cycling stability and hindering practical applications. In this work, a novel manganese oxide cathode with a hollow hexagonal pyramidal layered nanostructure is successfully synthesized and coupled with 1 M Al₂(SO₄)₃ electrolyte containing 0.06 M K₂SO₄. In situ and ex situ characterizations reveal that the cathode delivers high capacity through a synergistic Al 3+ /H + co–intercalation and deintercalation mechanism. Importantly, the introduction of potassium sulfate induces the formation of a potassium aluminum sulfate passivation layer, which effectively suppresses acid−induced electrode corrosion and enhances cycling stability. As a result, the assembled battery achieves a high specific capacity of 354 mAh g −1 at 0.2 A g −1 and a high discharge voltage plateau of 1.7 V . At 0.5 A g −1 , it maintains 90% of its capacity (based on a maximum activated capacity of 188 mAh g −1 ) over 420 cycles. This work provides a facile and effective strategy for developing high–performance aqueous aluminum–ion batteries.
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DOI
高影响因子
危险品化学品经营许可证（带存储）