APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Hongshang Wang,Jingkai Ma,Ruihan Lv,Ji Mi,Wenjun Fang
Traditional steam reforming technology encounters two primary challenges: catalyst deactivation and fuel system instability, which limit its hydrogen production efficiency and potential applications. This work addresses these challenges through the concurrent development of novel catalysts and highly stable fuel emulsions. In this work, ultra-stable quasi-homogeneous “water + JP-10/RP-3” systems were formulated utilizing binary Span 80/Tween 80 emulsifiers. The alloy-structured Ni 0.93 Pt 0.07 /Al 2 O 3 catalyst was synthesized via stirred impregnation followed by annealing. The catalyst demonstrated superior reforming efficiency and resistance to coking: with exo-tetrahydrodicyclopentadiene (JP-10，one of jet fuels) at 740 °C, a gas yield of 28.8 wt% and a hydrogen output of 4.68 mmol·g −1 were achieved alongside a consistent 20 % level of aromatic coke precursors. Furthermore, its capability with complex fuels was affirmed by reforming RP-3 aviation kerosene at 700 °C, which yielded 3.48 mmol·g −1 of H 2 . By combining steam reforming performance tests with density functional theory (DFT) calculations, and X-ray absorption fine structure (XAFS) analysis, this study clarifies the dual synergistic effects that contribute to its exceptional performance: (1) Platinum-induced electron-rich nickel significantly decreases the adsorption energy of critical intermediates, hence improving the efficiency of C-H bond activation. (2) The Pt addition markedly diminishes carbon deposition by reducing the tendency of CH x * intermediates to undergo further dehydrogenation into carbonaceous deposits, facilitating their effective removal.
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 8.4
Zewei Liu,Liping Zhang,Mingqian Cheng,Ling Chen,Wei Fang,Qihong Cen,Chao Chen,Bin Li
CF 4 , is a highly potent greenhouse gas emitted by the electrolytic aluminum industry, with a global warming potential 7390 times that of CO 2 . Its urgently necessary to effectively control and decompose it. Alumina industry is the upstream of electrolytic aluminum industry, from which the red mud (RM) generated should be recycled. In this study, the decomposition performance of CF 4 was improved by loading γ-Al 2 O 3 on hydrochloric acid-treated RM. Under optimal conditions (reaction temperature of 650 °C, WHSV of 1500 h −1 , and material dosage of 1 g), the decomposition efficiency of Al 1 HRM 2 for CF 4 reached 85 %. Compared with the unmodified acid-treated RM (HRM), the conversion rate and stability were significantly improved. The results of NH 3 -TPD, Py-IR and XPS indicated that acid treatment and addition of γ-Al 2 O 3 significantly increased the Lewis acid site and medium-strong acid site of Al 1 HRM 2 . During the reaction, CF 4 adsorbs and dissociates at the strongest Lewis acid site (Al Ⅲ ), forming an intermediate (CF 2 O) and CO 2 to achieve the decomposition of CF 4 . In comparison with existing decomposition techniques, the method proposed here avoids the generation of corrosive HF, while also promoting the development of a greener aluminum industry and the formation of high-value fluorides.
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DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Hao Zhang,Guang-Ren Qian,Hong Liu
Alumina composites containing microporous ZSM-5 (Z-5) and mesoporous ZSM-5 (MZ-5), corresponding to x ZA and x MZA, were developed by incorporating Z-5 and MZ-5 into γ - Al 2 O 3 , respectively. The two series of NiMoS/ x MZA and NiMoS/ x ZA catalysts were prepared with these two composites as supports, respectively, and were used for the simultaneous hydrodesulfurization (HDS) of thiophene (T) and benzothiophene (BT). The results show that NiMoS/ x MZA series catalysts exhibit higher HDS activity than that of NiMoS/ x ZA and NiMoS/γ-Al 2 O 3 , and the HDS activity of NiMoS/ x MZA catalysts increases with the increase of MZ-5. The high HDS activity can be mainly attributed to the synergistic effects of the efficient diffusing pore channels, high dispersion of type II NiMoS phases, suitable acidity, and moderate Mo-support interaction. Moreover, the product distribution of HDS shows that the NiMoS/ x MZA catalysts possess the dominant direct desulfurization (DDS) selectivity and the selectivity increases with the increase of MZ-5 content due to more corner sites and suitable Brønsted (B) acid sites, whereas the NiMoS/ x ZA catalysts perform more excellent hydrogenation (HYD) selectivity, and the selectivity increases with the increase of Z-5 content because of the existence of more edge sites. Based on this, the possible reaction network for T and BT hydrodesulfurization over the catalysts are proposed.
研究领域:
催化化学
·
能源化工
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 35
·期 1
·1-13
·
IF 2.8
Sun Qin,Yang Wanchun,Hu Zhongyu,Jia Gaozhi,Wang Yangyang
Copper pastes are widely used in metallization of ceramic surfaces but are limited by poor oxidation resistance, high resistivity, and low bonding strength. In this work, the 30Bi 2 O 3 –55B 2 O 3 –15ZnO glass powder was prepared by the melt-quenching method. A copper paste containing the glass powder and formic acid-treated copper microparticles was used for metallization of α -Al 2 O 3 ceramic surface. The copper thick films were obtained by low-temperature sintering after screen printing. The effects of the glass powder contents on resistivities and shear strengths of the copper films on α -Al 2 O 3 ceramic substrate were analyzed. The microstructures of the copper thick films and the interfacial bonding mechanism on the α -Al 2 O 3 ceramic surface were investigated in detail. The copper thick film with 10-wt% 30Bi 2 O 3 –55B 2 O 3 –15ZnO glass and sintered at 650 °C for 20 min exhibited a low resistivity (3.38 ± 0.94 µΩ cm) and a high shear strength (35.24 ± 1.2 MPa). ZnAl 2 O 4 and Bi 2 B 4 O 9 were detected on the edges of the copper film near the interface, which enhanced interfacial binding between the copper thick films and the α -Al 2 O 3 ceramic substrate. These results demonstrated that the low-temperature sintering copper paste containing 30Bi 2 O 3 –55B 2 O 3 –15ZnO glass was effective for α -Al 2 O 3 ceramic surface metallization.
研究领域:
材料科学
·
陶瓷
·
冶金学
·
电子封装
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Xiaolian Jing,Jiale Huang,Huixuan Wang,Mingming Du,Daohua Sun,Qingbiao Li
Supported Ag catalyst for ethylene epoxidation was prepared by an impregnation–bioreduction process with Cinnamomum camphora (CC) extract. Influence of bioreduction temperature, concentration of CC extract, silver loading amount, calcination temperature as well as Cs promoter on catalytic performance were thoroughly investigated and the catalysts were characterized. The results showed that the catalyst prepared from bioreduction process exhibited excellent performance for the ethylene epoxidation with O 2 . Proper amount of Cs addition could effectively improve the catalytic performance of the catalyst. The optimal catalyst 15Ag/α-Al 2 O 3 -150Cs gave the EO concentrations of 1.70%, EO selectivity of 87.46% and EO STY of 223.07 g h −1 L −1 cat at 200 °C, showing high catalytic stability with no significant decrease in the activity and the selectivity during 50 h.
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 47
·29779-29785
·
IF 3.108
Fengmei Ren,Ran Zhou,Fang Sun,Haihong Ma,Zhengfa Zhou,Weibing Xu
The surface of alumina (Al2O3) particles was modified by a blocked isocyanate silane coupling agent, which was synthesized by using methylethyl ketoxime (MEKO) to block isocyanate-propyltriethoxy silane via nucleophilic reactions. For comparison, the surface of Al2O3 particles was also modified by propyltrimethoxy silane (KH-331). The thermally conductive and electrical insulating Al2O3/polyamide 6 composites were prepared by dispersing modified Al2O3 in polyamide 6 (PA6) using a twin-screw extruder. The X-ray photoelectron spectroscopy (XPS) results revealed that blocked isocyanate-propyltriethoxy silane and KH-331 were successfully attached to the surface of Al2O3 particles with chemical bonds. The blocked isocyanate silane modified Al2O3 were well dispersed in PA6 as revealed by scanning electron microscopy (SEM). When the Al2O3 content was 70 wt%, the tensile strength (85.2 MPa) and flexural strength (136.4 MPa) of blocked isocyanate silane modified Al2O3/PA6 composites were higher than those of KH-331 modified Al2O3/PA6 composites (52.5 MPa, 77.8 MPa), respectively. The thermal conductivity and impact strength of blocked isocyanate silane modified Al2O3/PA6 composites were also higher than that of KH-331 modified Al2O3/PA6 composites at the same content of Al2O3. The volume electrical resistivity of modified Al2O3/PA6 composites decreased with increasing Al2O3 content, but they still were good electrical insulating materials.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 11
·17923-17928
·
IF 3.83
Jian Xu,Yang Yang,Ziquan Guo,Dennis Dan Corell,Baoli Du,Bingguo Liu,Haipeng Ji,Carsten Dam-Hansen,Ole B. Jensen
Recent studies revealed that both the Al 2 O 3 –Y 3 Al 5 O 12 :Ce (YAG:Ce) composite ceramic (YAG-CC) and single crystalline YAG:Ce (YAG-SC) possess very high luminescence-saturation thresholds (LSTs), which makes them promising for laser lighting applications. The present study is aimed to conduct a comparative investigation between YAG-CC and YAG-SC on aspects of the laser-pumped luminescence and the associated thermal behavior. The colorimetric and photometric properties (e.g. luminous flux/efficacy, correlated color temperature, and color rendering index) were investigated systematically, by conducting the measurements using a custom-built sphere-spectroradiometer system in the transmission mode. It was found that YAG-SC has a superior LST and it could maintain a high luminous efficacy (106 lm/W) under the irradiation of a 15.33 W blue laser , while the YAG-CC saturated at around 7.76 W. Moreover, by combining the thermal imaging data with the spectral variation of the YAG-CC, novel experimental insights into the origin of luminescence saturation were revealed and proposed as the “thermally-induced absorption saturation”.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Xiuyong Chen,Jianhui Yuan,Jing Huang,Kun Ren,Yi Liu,Shaoyang Lu,Hua Li
This study aims to further enhance the anti-corrosion performances of Al coatings by constructing superhydrophobic surfaces. The Al coatings were initially arc-sprayed onto steel substrates, followed by deposition of polyurethane (PU)/nano-Al 2 O 3 composites by a suspension flame spraying process. Large-scale corrosion-resistant superhydrophobic PU/nano-Al 2 O 3 -Al coatings were successfully fabricated. The coatings showed tunable superhydrophilicity/superhydrophobicity as achieved by changing the concentration of PU in the starting suspension. The layer containing 2.0 wt.%PU displayed excellent hydrophobicity with the contact angle of ∼151° and the sliding angle of ∼6.5° for water droplets. The constructed superhydrophobic coatings showed markedly improved anti-corrosion performances as assessed by electrochemical corrosion testing carried out in 3.5 wt.% NaCl solution. The PU/nano-Al 2 O 3 -Al coatings with superhydrophobicity and competitive anti-corrosion performances could be potentially used as protective layers for marine infrastructures. This study presents a promising approach for fabricatiing superhydrophobic coatings for corrosion-resistant applications.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
海洋工程
·
高分子材料
·
金属涂层
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 48
·期 16
·23258-23265
·
IF 5.532
Jianlong Chai,Yabin Zhu,Xing Gao,Tielong Shen,Lijuan Niu,Shufen Li,Peng Jin,Minghuan Cui,Zhiguang Wang
Al 2 O 3 /SiC ceramic composites with different SiC contents have been prepared by powder metallurgy at 1600 °C for 120 min at 30 MPa pressure. The effect of second phase particles on the microstructure and mechanical properties of composites have been studied. The results show that SiC particle has a significant impact on the matrix subjected to residual stress, and on the microstructure of the composites as well. The average grain size of alumina matrix decreases as the SiC particle content increases. Simultaneously, it has been found that the mechanical properties of the material are significantly enhanced in comparison with monolithic Al 2 O 3 . The highest strength and toughness are obtained when the SiC content is 15 vol%, and the values are 1237 MPa and 5.68 MPa m 1/2 , respectively. The mechanisms of strengthening and toughening have been discussed.
研究领域:
材料科学
·
陶瓷学
·
复合材料工程
·
固态物理
·
粉末冶金
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 16
·11323-11333
·
IF 3.9
Xiangyu Tan,Zhongqiang Zhao,Zhimin Na,Ran Zhuo,Fangrong Zhou,Dibo Wang,Longchang Zhu,Yi Li,Shaocong Hou,Xin Cai
Silicon–carbon composites have been recognized as some of the most promising anode candidates for advancing new-generation lithium-ion batteries (LIBs). The development of high-efficiency silicon/graphene anodes through a simple and cost-effective preparation route is significant. Herein, by using micron silicon as raw material, we designed a mesoporous composite of silicon/alumina/reduced graphene oxide (Si/Al2O3/RGO) via a two-step ball milling combined annealing process. Commercial Al2O3 nanoparticles are introduced as an interlayer due to the toughening effect, while RGO nanosheets serve as a conductive and elastic coating to protect active submicron silicon particles during lithium alloying/dealloying reactions. Owing to the rational porous structure and dual protection strategy, the core/shell structured Si/Al2O3/RGO composite is efficient for Li+ storage and demonstrates improved electrical conductivity, accelerated charge transfer and electrolyte diffusion, and especially high structural stability upon charge/discharge cycling. As a consequence, Si/Al2O3/RGO yields a high discharge capacity of 852 mA h g−1 under a current density of 500 mA g−1 even after 200 cycles, exhibiting a high capacity retention of ∼85%. Besides, Si/Al2O3/RGO achieves excellent cycling reversibility and superb high-rate capability with a stable specific capacity of 405 mA h g−1 at 3000 mA g−1. Results demonstrate that the Al2O3 interlayer is synergistic with the indispensable RGO nanosheet shells, affording more buffer space for silicon cores to alleviate the mechanical expansion and thus stabilizing active silicon species during charge/discharge cycles. This work provides an alternative low-cost approach to achieving high-capacity silicon/carbon composites for high-performance LIBs.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
复合材料
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 75
·期 6
·1466-1473
·
IF 1.197
Li Shifeng,Qi Fang,Xiao Min,Fan Hongtao,Shen Yanming,Du Kaige,Zhang Zhigang,Li Wenxiu
Mg-Al layered double hydroxides (LDHs) adsorbent was synthesized in situ on γ -Al 2 O 3 for the removal of Cr(VI) from aqueous solution. The material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electronic microscopy and thermogravimetry and differential thermal analysis. Compared to the LDHs powder, the calcined LDHs sorbent prepared in situ on γ -Al 2 O 3 had higher specific surface area and was easy to recover and reuse. The adsorptive capacity for removing Cr(VI) from aqueous solution was resulting from the memory effect of LDHs based on the XRD results. Both the pseudo-second-order kinetic model and the Langmuir model fit the experimental data well. Furthermore, the adsorbent exhibits excellent sorption–regeneration performances.
研究领域:
环境科学
·
材料化学
·
水处理
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DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Yan Wang,Yuxi Si,Feiyue Zhang,Zhanqi Yang,Libin Liu,Yanming Hou,Hairui Lin,Zhuohan Li,Hu Li,Lele Zhang,Pengfei Xie,Youwei Cheng
Complete oxidation of propane has attracted widespread attention in the treatment of volatile organic compounds (VOCs) from Fischer-Tropsch synthesis tail gas. Pt-based catalysts have been considered highly promising catalysts for the catalytic oxidation of propane due to their high-activity. However, despite the recognized importance of the synergistic effect between Pt nanoparticles (NPs) and support materials, the detailed reaction mechanism investigation remains limited. In this work, we demonstrate that the Pt/Al 2 O 3 catalyst exhibits improved propane catalytic performance, which is attributed to the synergistic interaction between Pt NPs and surface hydroxyl groups on the support. The improved Pt dispersion in Pt/Al 2 O 3 catalysts with smaller Pt NPs facilitates the spillover of gaseous oxygen species and the stabilization of active sites for propane oxidation. Furthermore, in- situ DRIFTS characterization and density functional theory (DFT) calculation confirm that surface hydroxyl groups on Al 2 O 3 effectively reduce the activation barrier for C-H bond cleavage, thereby improving the reactivity of propane molecules. This work provides a novel insight into metal-support synergy for propane oxidation, which offers strategic guidance for the rational design of efficient catalysts in hydrocarbon conversion processes.
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DOI
高影响因子
危险品化学品经营许可证（带存储）