APPLIED CATALYSIS A-GENERAL
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2020
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IF 5.006
Haodong Duan,Xiaolei Xu,Kangwei Leng,Ge Guo,Qing Yu,Xinjin Li,Yuxi Han,Jun Gao,Zhongwei Wang
The characteristics of the reaction for the preparation of dichlorophenylphosphine (DCPP) via benzene and PCl 3 in the presence of AlCl 3 were studied. Some unique characteristics were observed when a catalytic amount of AlCl 3 was used. Namely, more than one mole of DCPP was obtained per mole AlCl 3 , the reaction solution was layered, and DCPP could be directly separated. Our mechanistic study showed that benzene reacted with PCl 3 to form DCPP-AlCl 3 , and DCPP-AlCl 3 dissociated into DCPP and AlCl 3 , continuing to catalyze this reaction. This resulted in the high catalytic efficiency of AlCl 3 . The layering of the reaction solution was caused by the immiscibility of DCPP-AlCl 3 with the raw materials, greatly facilitating the dissociation process of DCPP-AlCl 3 . The formation of diphenylphosphorus chloride (DPC) was due to a continuous Friedel-Crafts reaction between DCPP and benzene. DPC cooperated with AlCl 3 to form the stable coordination compound DPC-AlCl 3 that did not dissociate and was responsible for the deactivation of AlCl 3 .
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CONSTRUCTION AND BUILDING MATERIALS
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2019
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IF 4.046
Tao Yang,Zuhua Zhang,Huajun Zhu,Xuan Gao,Chendong Dai,Qisheng Wu
High-magnesium nickel slag (HMNS) has shown the potential as precursor in the production of alkali-activated materials (AAMs). This study re-examines the suitability of HMNS by comparatively investigating the reactivity of four different sourced HMNSs and analyzing impacts of the magnesium sources in HMNS on the reaction products of AAMs. Results show that the cooling way plays a determinant role of their mineral compositions. The air-cooled HMNSs contain only ∼30 wt% glassy phases, while the water-quenched one is dominantly amorphous. The reactivity of HMNS determined by the dissolution tests correlates well with the calculated depolymerization degree of glasses. HMNS indeed exhibits lower reactivity than the precursors commonly used for AAMs production, such as fly ash and blast furnace slag . In the HMNS samples in the sodium hydroxide solution, M-S-H, C-S-H and hydrotalcite are the main reaction products. The OH − ions in the aqueous system react with Mg 2+ to form the brucite, indicating that there is still a volume expansion risk if sodium hydroxide is used as activator. In comparison, only M-S-H and C-S-H gels are coexistent in the samples leached in the sodium silicate solution, because of the kinetic hindrance of soluble silicates for the formation of hydrotalcite and brucite.
研究领域:
材料科学
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硅酸盐化学
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无机非金属材料
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固废资源化
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建筑材料
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高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Song Wu,Yongfeng Xia,Ming Zhu,Jun Zhao,Dongxu Yao,Yu-Ping Zeng
Si 3 N 4 ceramics now face new applications and challenges in the semiconductor field. The preparation of h-BN/Si 3 N 4 machinable ceramics incorporating 5–30 vol% h-BN via hot-pressing was carried out. This study systematically explored how the varying h-BN content influenced the composite's microstructure, mechanical attributes, and machinability . The results showed that some of the h-BN was encapsulated by growing Si 3 N 4 grains to form an intragranular structure during the process of hot-pressing, while the remaining h-BN exhibited uniform distribution along grain boundaries. The Si 3 N 4 phase transition in composites was inhibited by excessive h-BN, accompanied by a higher decrease in densification. The sample containing 20 vol% h-BN exhibited the best comprehensive performance, with high mechanical strength and excellent machinability. The bending strength and fracture toughness remained high at 862 MPa and 10.3 MPa m 1/2 , and could be effortlessly machined with cemented carbide drills. Additionally, the machinability of the composites was systematically characterized through observations of crack propagation paths, fitting of R-curves, and mechanical drilling tests.
研究领域:
材料科学
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陶瓷工程
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高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Pangpang Li,Jingyi Jiang,Han Yan,Yuexin Zhai,Wanlin Fu,Yueming Sun,Yunqian Dai
Ultrafine Pt clusters exhibit superior activity for propane dehydrogenation compared to larger Pt nanoparticles; however, they are prone to sintering at high operating temperatures, leading to a decline in both activity and selectivity. In this work, porous ZrOx/SiO2 nanofibers featuring highly dispersed ZrOx nanodomains within a SiO2 matrix were successfully fabricated via a high-throughput blow-spinning process. The abundant and thermal-stable 1.6 nm micropores significantly stabilize 1.5 nm PtGa clusters against sintering at temperatures over 800 °C, due to the pore confinement. Moreover, the electron transfer from Ga to Pt is significantly enhanced in close proximity to ZrOx, contributing to metallic Pt with exceptional activity toward C–H bond activation. Thereby, the sinter-resistant PtGa/ZrOx/SiO2 nanofibers maintained 98.8% propylene selectivity and 43.2% propane conversion rate over 100 h of reaction, with a deactivation rate constant down to 0.0045 h–1. This work explores a sinter-resistant catalytic system based on oxide nanofibers and elaborates a new logic for the design of high-performance propane dehydrogenation catalysts with long-term stability.
研究领域:
催化化学
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材料科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Huixin Wu,Jinghao Fan,Liang Wang,Hai Wang
Selective ammoxidation of sp 3 -hybridized C-H bonds is very important in the pharmaceutical and fine-chemical industries. However, simultaneous activation of the C-H bond and ammonia is difficult due to the competitive adsorption of ammonia and hydrocarbons on metal sites, which poisons the catalyst. In this study, we report an atomically dispersed rhodium (Rh) catalyst supported on manganese oxide nanorod that exhibited high activity and selectivity for the C-H bond ammoxidation under mild reaction conditions, outperforming the conventional supported metal catalysts and homogeneous manganese catalysts under the equivalent conditions. Mechanistic studies reveal that the manganese oxide nanorod with potassium ions in the tunnels significantly hindered the ammonia poisoning to Rh, providing free Rh sites for C-H bond activation and enhancing the ammonia-resistance of the catalyst. This work provides an opportunity to improve the efficiency of industrially important reactions that suffer from catalyst deactivation due to surface poisoning.
研究领域:
催化化学
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材料化学
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有机合成
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多相催化
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可持续化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Lu Zheng,Saisai Ju,Xiong Li,Yongde Ma,Hongwei Zhang,Zhenping Cai,Yanning Cao,Kuan Huang,Lilong Jiang
Efficient capture of residual NH₃ from Haber-Bosch recycling gas is essential to improve process efficiency and reduce environmental impact. In this study, a series of sulfonated porous organic polymers (PTO-1S, PTT-1S, PTF-1S) were fabricated by a post-sulfonation strategy using phenolic hydroxyl-containing precursors to capture NH 3 . Comprehensive characterizations of the sulfonated derivatives demonstrated not only the successful grafting of –SO₃H groups, but more importantly, a cooperative effect with the native phenolic –OH groups. The optimized PTO-1S achieves an outstanding NH₃ capacity of 11.52 mmol/g (at 298.2 K and 1 bar), with particularly impressive performance at low pressures (5.56 mmol/g at 313.2 K and 0.03 bar), surpassing most reported adsorbents. Mechanistic studies revealed that this cooperation creates an optimal balance of strong chemisorption (–SO₃H) and reversible hydrogen bonding (–OH), which is identified as the origin of the high capacity and exceptional cycling stability (< 1% capacity loss/cycle). Besides, the sulfonated samples maintain excellent selectivity under simulated industrial conditions (NH₃/N₂/H₂ mixtures) and a rapid adsorption rate (90% saturation within 2 min), demonstrating their potential for practical NH₃ recovery applications.
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CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Xiaoxia Tao,Peng Wang,Run Hou,Huafei Liao,Fenghai Cao,Yajie Fu,Yang Chen,Lizhi Wu,Yu Tang,Li Tan
Supported iron-based catalysts have emerged as promising candidates for alkane dehydrogenation due to their excellent sulfide resistance, cost-effectiveness, and environmental advantages to meet the needs of industrial applications. However, the practical application of iron-based catalysts is hindered by insufficient catalytic activity and rapid deactivation, primarily caused by the reduction/sintering of metastable iron species and concomitant carbon deposition during the reaction. This work systematically investigates the divergent catalytic behaviors of alumina- versus silica-supported Fe catalysts in propane dehydrogenation (PDH). Comprehensive characterizations demonstrate that the surface acidic alumina support establishes strong metal-support interactions (MSI) with electron-rich [Fe 2.4+ O 4 ] domains, effectively enhancing catalytic activity with a propane conversion of 29 % and 80 % propylene selectivity, outperforming silica-supported counterparts. At the same time, the robust active structure of [Fe 2.4+ O 4 ] in the 3Fe/Al 2 O 3 catalyst matches good regeneration capability, enabling suffered from six reaction-regeneration cycles. Moreover, this study indicates that effective propane dehydrogenation requiring synergistic interplay between FeO x speciation and acid sites on the support surface.
研究领域:
催化化学
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表面化学
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能源化工
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Zhikang Xu,Yunxing Zhang,Xing Wu,Haibo Zhu
Co-based catalysts are emerging as one of the most promising catalysts for propane dehydrogenation (PDH) due to their abundant availability, environmental friendliness, and efficient activation of the C–H bond. Isolated Co(II) is recognized as the active site for activating the C–H bond in PDH; however, the controllable synthesis of Co catalysts with well-defined isolated Co(II) remains a challenge. In this study, a direct and straightforward route was developed for the synthesis of Co-Beta using a fluorine-assisted hydrothermal crystallization method. The structure of Co-Beta was studied using various characterization tools, including XRD, STEM, H 2 -TPR, UV–vis, XPS, solid-state 29 Si MAS NMR and EXAFS techniques. It was confirmed that the Co species are incorporated into the structure of Beta zeolite, existing as isolated Co(II) sites embedded within the framework of Beta zeolite. The optimized catalyst, 1.0Co-Beta, exhibits excellent performance in PDH, achieving a propane conversion of approximately 50 % and propylene selectivity of around 96 % at 600 °C. This performance surpasses that of previously reported non-noble metal catalysts. This study provides fundamental insights on the design and synthesis of highly dispersed metal oxide catalysts for PDH.
研究领域:
催化化学
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材料科学
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高影响因子
CELL
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2025
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IF 42.5
Nan Zhou,Jingzhi Chen,Meiqin Hu,Na Wen,Weijie Cai,Ping Li,Liding Zhao,Yaping Meng,Dongdong Zhao,Xiaotong Yang,Siyu Liu,Fangqian Huang,Cheng Zhao,Xinghua Feng,Zikai Jiang,Enjun Xie,Hongxu Pan,Zhidong Cen,Xinhui Chen,Wei Luo,Beisha Tang,Junxia Min,Fudi Wang,Junsheng Yang,Haoxing Xu
Lysosomes maintain an acidic pH of 4.5–5.0, optimal for macromolecular degradation. Whereas proton influx is produced by a V-type H + ATPase, proton efflux is mediated by a fast H + leak through TMEM175 channels, as well as an unidentified slow pathway. A candidate screen on an orphan lysosome membrane protein (OLMP) library enabled us to discover that SLC7A11, the protein target of the ferroptosis-inducing compound erastin, mediates a slow lysosomal H + leak through downward flux of cystine and glutamate, two H + equivalents with uniquely large but opposite concentration gradients across lysosomal membranes. SLC7A11 deficiency or inhibition caused lysosomal over-acidification, reduced degradation, accumulation of storage materials, and ferroptosis, as well as facilitated α-synuclein aggregation in neurons. Correction of abnormal lysosomal acidity restored lysosome homeostasis and prevented ferroptosis. These studies have revealed an unconventional H + transport conduit that is integral to lysosomal flux of protonatable metabolites to regulate lysosome function, ferroptosis, and Parkinson’s disease (PD) pathology.
研究领域:
细胞生物学
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医学
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神经科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Lu Wen,Chaojie Li,Houqun Xiao,Huazhou Hu,Chaobin Lai,Luocai Yi,Qingjun Chen
The ZrCo alloy stands out as one of the most promising candidates for hydrogen isotope storage materials in nuclear fusion, owing to its extremely low equilibrium hydrogen pressure (10 −3 Pa, 20 ℃). However, ZrCo experiences severe disproportionation reactions during dehydrogenation/hydrogenation processes, which lead to significant performance degradation. To address this, we have introduced V and Ti into the ZrCo alloy, resulting in the Zr 0.8 V x Ti 0.2-x Co (x = 0–0.15) series. Our research indicates that the addition of V and Ti reduces the lattice parameters, thereby increasing the platform pressure for hydrogen desorption and decreasing the enthalpy and entropy of the desorption reaction. This modification allows for a lower desorption temperature and enhances the alloy's resistance to hydrogen-induced degradation. Remarkably, the hydrogen storage capacity of the Zr 0.8 V x Ti 0.2-x Co(x = 0–0.15) alloys remains stable after 19 h of desorption. Furthermore, the Zr 0.8 V 0.05 Ti 0.15 Co alloy demonstrates exceptional cycling stability, retaining over 99 % of its hydrogen storage capacity after 50 cycles. First-principles calculations have clarified the adsorption energies of hydrogen at different binding sites, revealing the following order of stability: E b(Ti-V) < E b(Zr-Ti) < E b(V-Zr) < E b(Zr-Zr) . The hydrogen absorption and desorption kinetics of the Zr 0.8 V x Ti 0.2-x Co alloys follow the trend: Zr 0.8 V 0.15 Ti 0.05 Co > Zr 0.8 V 0.1 Ti 0.1 Co > Zr 0.8 V 0.05 Ti 0.15 Co > ZrCo, indicating optimized performance with the introduction of V and Ti. This study not only provides a viable solution to the disproportionation issue in ZrCo alloys but also offers valuable insights into the design of high-performance hydrogen isotope storage materials for nuclear fusion applications.
研究领域:
材料科学
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核聚变工程
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金属氢化物
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储氢材料
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物理化学
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计算材料学
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高影响因子
WEAR
·
2026
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IF 6.1
Dapeng Gu,Hao Xu,Ke Liu,Chenxi Suo,Junqi Ge,Suwen Chen
To achieve the low-temperature combination of ceramics and polymers, the core-shell structure and cold sintering method are employed to prepare ceramic/polymer composites. An easy-bonding Silica (SiO 2 ) shell was introduced onto the surface of the hard-bonding Hexagonal boron nitride (h-BN) core by a sol-gel method to fabricate a core-shell structured h-BN@SiO 2 composite. Polyether ether ketone (PEEK) was subsequently filled into h-BN@SiO 2 to prepare h-BN@SiO 2 /PEEK ceramic composite by a cold sintering method. The effects of PEEK content (20 vol%, 35 vol%, and 50 vol%), sintering temperature (205 °C, 245 °C, 285 °C, and 325 °C), and molding pressure (350 MPa, 450 MPa, and 550 MPa) on the dry tribological properties of h-BN@SiO 2 /PEEK ceramic composites against GCr15 bearing steel were investigated using a ball-on-disc contact configuration. Field emission transmission electron microscopy (TEM), Energy dispersive spectrometer (EDS), Field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectrometer (FTIR) were used to characterize and analyze h-BN@SiO 2 or h-BN@SiO 2 /PEEK ceramic composites. The results indicate that h-BN@SiO 2 /PEEK composite exhibits better tribological performance when fabricated with a PEEK content of 35 vol%, a sintering temperature of 285 °C, and a molding pressure of 450 MPa under the investigated conditions. The formation of a stable and continuous mixed lubrication layer composed of h-BN, PEEK, and SiO 2 is identified as the primary factor contributing to the enhanced friction reduction and wear resistance. Under the investigated conditions, the main wear mechanisms observed in h-BN@SiO 2 /PEEK composites are adhesive wear, fatigue wear, and slight abrasive wear.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Ligang Ma,Yihuan Ding,Chao Lin,Yuqing Yang,Le Xu,Hui Qiu,Huilin Jiang,Xiang Song,Xiaoqian Ai
The photo-corrosion issue inherent in metal sulfide semiconductors is quite pronounced, making the enhancement of electron-hole pair separation efficiency in these photocatalysts a pivotal strategy for boosting photocatalytic hydrogen production. This study introduces a novel approach where hexagonal boron nitride ( h -BN) acts as a substrate for the in situ growth of ZnIn 2 S 4 nanostructures, resulting in the formation of h -BN@ZnIn 2 S 4 (BN@ZIS) nanocomposites. The electronegativity of h -BN nanosheets is harnessed to facilitate the recombination or electrostatic attraction of photogenerated holes in the ZnIn 2 S 4 photocatalyst. This strategy effectively promotes the separation of photogenerated electron-hole pairs, which is crucial for enhancing photocatalytic performance. The microstructure, morphology and optical properties of BN@ZIS nanocomposites were meticulously investigated. The findings reveal that the incorporation of h -BN nanosheets loads to a more uniform dispersion of the ZnIn 2 S 4 nanostructure, which not only increases the specific surface area but also fosters a tight heterojunction interface between h -BN and ZnIn 2 S 4 . In conclusion, the photocatalytic hydrogen production capabilities of the BN@ZIS nanocomposites were rigorously evaluated. Pure h -BN lacks photocatalytic hydrogen production activity. Conversely, the optimized BN@ZIS composite demonstrated a remarkable enhancement, exhibiting a photocatalytic efficiency that is 9.65 times greater than that of pristine ZnIn 2 S 4 . Furthermore, a plausible mechanism by which BN@ZIS augments photocatalytic hydrogen production has been proposed. This strategy, leveraging the synergistic interaction between h -BN and ZnIn 2 S 4 , is anticipated to be applicable to other semiconductor systems, opening avenues for the advancement of photocatalytic technologies.
研究领域:
材料科学
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能源化学
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危险品化学品经营许可证（带存储）