JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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2013
·Vol. 51
·期 7
·1559-1564
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IF 3.543
Xiao-Hui Liu,Yun-Hai Yu,Di Jia,Bo-Wen Cheng,Fei-Jun Zhang,Hui-Na Li,Peng Chen,Shan Xie
Single electron transfer living radical polymerization of methyl methacrylate catalyzed by the in situ prepared Cu(0) at ambient temperature was first examined using various metallic powders, including Zn(0), Ni(0), Mg(0), and Fe(0). Importantly, the polymerization initiated with Ni(0)/EBiB/CuBr 2 /PMDETA system exhibited optimal living/controlled nature and generated polymers with polydispersity index as low as 1.04 for 75.27% conversion and controlled molecular weights close to theoretical ones. A wide of range of Cu(II) salts were also investigated as catalyst sources instead of CuBr 2 . The recycling of Ni(0) was very convenient due to its magnetic property, which enables its extensive application. © 2013 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013
研究领域:
高分子化学
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材料科学
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催化化学
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有机合成
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功能材料
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Zehang Zhao,Guanjiu Wu,Duan Wen,Minkang Li,Yuan Li,Lu Zhang,Shumin Han
A 2 B 7 -type La–Mg–Ni-based alloys are considered as promising hydrogen storage materials . However, low absorption/desorption platform pressure and poor cycling stability restricts their practical application. The neodymium element could improve the hydrogen absorption/desorption platform pressure and the cycling stability with its smaller atomic radius and larger electronegativity . In this study the Nd 1– x Mg x Ni 3.50 ( x = 0.25, 0.30, 0.36) alloys were prepared and Mg variation was adopted to tailor the microstructure and hydrogen storage performances. All the alloys consist of Gd 2 Co 7 -type and Ce 2 Ni 7 -type superlattice structure , and the cell parameters ( a , c and V ) are reduced by increasing Mg content. The higher Mg content yields a higher plateau pressure, a higher cycling stability and an easier hydrogen release. The x = 0.30 alloy shows a plateau pressure of 0.81 MPa, a 100th-cycle capacity retention rate of 91.0 %, and a dehydriding enthalpy change of 19.18 kJ mol −1 . These good comprehensive hydrogen storage performances are attributed to the promoted crystallographic stability and reduced cell parameters.
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Journal of Energy Storage
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2026
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IF 10.7
Yu-Han Yuan,He-Jie Wu,Jia Liang,Hai Huang,Gui-Fang Li,Jin-Wei Yan,Shuang-Lin Cai,Yong-Qi Ye,Ye Zeng,Ming-Ming Tao,Xiao-Hong Fan,Yi Li,Ding-Rong Deng,Qi-Hui Wu
Driven by the global push for sustainable energy, supercapacitors are regarded as competitive energy storage systems. Nevertheless, boosting their energy density and cycling durability remain core challenges. Herein, a La 2 O 3 /Al 2 O 3 heterostructure (La-Al-O) is in-situ fabricated on nickel foam (NF) via a hydrothermal route. Electrochemical activation converts crystalline La 2 O 3 into amorphous La 2 O 3 , triggering structural reconstruction: interwoven nanosheet networks evolve into loose, crumpled nanosheets. This transformation enriches oxygen vacancies and generates Ni(OH) 2 on NF to create abundant ion-accessible active sites, while Al 2 O 3 serves as a structural stabilizer against framework collapse (activated La-Al-O, abbreviated A-La-Al-O). In terms of electrochemical performance, the A-La-Al-O/NF electrode exhibited a high specific capacitance of 4.60 F·cm −2 at a current density of 5 mA·cm −2 . After 20,000 cycles at a scan rate of 20 mA·cm −2 , the cycle retention rate was 75.7%. For the assembled asymmetric device (denoted as A-La-Al-O/NF/activated carbon (AC)), an energy density of 49.41 Wh·kg −1 was achieved at a power density of 889.38 W·kg −1 , with a cycle retention rate of 82.5% after 20,000 cycles. This study adopts method combining hydrothermal and electrochemical activation without the need for binders, featuring a simple and convenient process. It provides a new insight for the high-value utilization of rare earths and the development of high-performance supercapacitors.
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ACS Applied Electronic Materials
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2026
·Vol. 8
·期 14
·5979-5990
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IF 4.7
Zhang Wenhao,Chen Sicheng,Xu Ting,Song Chunjun,Zhang Jian,Li Di,Xin Hongxing
PbBi 2 Te 4 is regarded as a promising thermoelectric material due to its complex ternary layered structure. However, its intrinsically high carrier concentration limits its thermoelectric performance. To address this issue, Ni and Se doping was initially employed to modulate the carrier concentration. Nonetheless, the modest enhancement achieved through doping alone suggests that this strategy is insufficient to substantially improve the thermoelectric properties of PbBi 2 Te 4 . Subsequently, solid-state lithiation was systematically investigated as an alternative approach. The incorporation of Li ions into the PbBi 2 Te 4 matrix effectively reduced the thermal conductivity, leading to a significant enhancement in thermoelectric performance. Specifically, after solid-state lithiation of the Ni- and Se-co-doped sample (PbNi 0.04 Bi 1.96 Te 3.6 Se 0.4 ), a maximum figure of merit (ZT) of 0.54 was achieved at 590 K, corresponding to a 68% improvement over the ZT max of pristine PbBi 2 Te 4 . Furthermore, an average ZT of 0.41 was obtained in the temperature range of 300–650 K, representing a 140% increase compared to that of the pristine sample over the same temperature range. These findings offer valuable insights for the further development of PbBi 2 Te 4 -based thermoelectric materials.
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Defence Technology
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2026
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IF 6.4
Kan Xie,Yiyang Wang,Zijie Zhao,Jingyu Lei,Sulan Yang,Bin Tian
The dense oxide layer on the surface of aluminum (Al) particles is recognized as a major limitation to their combustion efficiency in solid propellants. Metal fluorides have emerged as promising combustion modifiers capable of enhancing Al reactivity through a catalytic-activation synergy. However, the systematic influence of NiF 2 content on this process remains poorly understood. In this work, the effect of NiF 2 content on the combustion performance of Al/AP composite fuels and hydroxyl-terminated polybutadiene (HTPB)-based propellants was systematically investigated. A series of composites and propellants with varying NiF 2 loadings were prepared and evaluated using an oxygen bomb calorimeter, thermal analysis, high-speed photography, and product characterization. The optimal NiF 2 content was determined to be 6 wt%, at which the composite fuel achieved a maximum reaction heat of 9357.62 J/g, corresponding to a 12.3% increase relative to the unmodified sample. Thermal analysis revealed that an appropriate amount of NiF 2 leads to the merging of the low- and high-temperature decomposition peaks of AP and the concentration of the exothermic event, indicative of a synergistic catalytic effect; excessive addition, in contrast, was found to suppress heat release. In propellant combustion, the SP-2 sample containing 2 wt% NiF 2 exhibited the most pronounced pressure-dependent burning-rate increase, with a maximum increase of 26.9% over the pressure range of 1.5–2.5 MPa. Product analysis further demonstrated that the condensed combustion products (CCPs) of SP-2 contain a higher proportion of Al 2 O 3 , exhibit a significantly reduced and multimodal particle size distribution with abundant submicron particles, and feature detectable AlN, confirming that NiF 2 effectively inhibits molten Al agglomeration and promotes combustion completeness. Therefore, the optimal working window of NiF 2 in the Al/AP system is identified, and its synergistic oxide-layer erosion and catalytic decomposition mechanism is elucidated, providing a key basis for the development of high-performance Al-based propellants.
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JOURNAL OF CATALYSIS
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2026
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IF 6
Xiaoqiang Zhang,Quanlei Wang,Chuang Wang,Junli Ren,Xinze Du,Huixiang Li,Da-Ming Gao
Efficient hydrodeoxygenation (HDO) of biomass-derived phenolics relies on the effective coupling of hydrogen activation and C-O bond cleavage. Here, we report a Ni-NiO interfacial catalyst that enables interfacial synergy by integrating hydrogenation and deoxygenation functions within a confined nanoscale interface. By tailoring the reduction temperature of NiO/Al 2 O 3 , the Ni/NiO ratio is precisely controlled, with the catalyst reduced at 400 °C exhibiting highly dispersed Ni species intimately interfaced with NiO. Mechanistic studies suggest that hydrogen dissociated on metallic Ni can spill over to adjacent NiO, generating interfacial hydrogen species and enhanced acidity that facilitate C-O bond cleavage. Meanwhile, the close proximity of Ni and NiO enables efficient coupling of the hydrogenation and deoxygenation functions, thereby promoting rapid tandem conversion at the interface and lowering the apparent activation barrier for vanillin HDO.
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ELECTROCHIMICA ACTA
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2026
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IF 5.8
Yu-Han Yuan,Jia Liang,He-Jie Wu,Gui-Fang Li,Shuang-Lin Cai,Jin-Wei Yan,Hai Huang,Ye Zeng,Ming-ming Tao,Xiao-hong Fan,Yi Li,Ding-Rong Deng,Qi-Hui Wu
F-CN@RGO presents multi-dimensional synergy between the conductive framework and heteroatom doping. • F-doping induces lattice distortion, optimizes the electronic structure, enhances redox kinetics. • It exhibits outstanding long-cycle stability, with a capacitance retention of 86.8% after 30,000 cycles. • The asymmetric supercapacitor achieves a high energy density of 87.75 Wh·kg −1 and excellent cycling stability. Supercapacitors possess exceptional capacity to transfer energy quickly, but increasing cycle stability and energy density is still a major problem that hinders their commercial applications. This study uses a one-step hydrothermal method to build and construct a fluorine F-doped three-dimensional (3D) Co 2 NiO 4 @reduced graphene oxide (RGO) heterostructure (referred as F-CN@RGO) on the nickel foam (NF) electrical collector. RGO-wrapped NF functions as 3D conductive framework that suppresses the volume strain during long-term cycling while simultaneously improving the electron transfer efficiency, electrical conductivity, and specific surface area. F-doping regulates the electronic structure, surface properties, and chemical stability of Co 2 NiO 4 @RGO. The high electronegativity of F ions accelerates the electron transfer, induces the lattice distortion of Co 2 NiO 4 @RGO, and consequently modulates its electronic structure and interfacial reaction kinetics. Electrochemical tests show that the activated F-CN@RGO (A-F-CN@RGO) has a high specific capacitance of 8.76 F·cm −2 (5 mA·cm −2 ). After 30,000 cycles, the asymmetric supercapacitor with A-F-CN@RGO and activated carbon as the electrodes retains 88.2% of its initial capacitance. By generating multi-dimensional synergistic effects with rational design structure between the substrate and active materials as well as heteroatoms and host materials, this work offers a universal technique for the controlled production of high-performance electrodes for supercapacitors. Download: Download high-res image (403KB) Download: Download full-size image
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Materials Today Physics
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2026
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IF 9.3
Lijun Zhai,Feng Luo,Lingfang Liu,Xinyue Zhang,Jian Shi,Jian Wang,Yanli Li,Hongxia Liu,Wenjie Xie,Zhigang Sun
The 18-electron Ti 0.75 NiSb compound exhibits intrinsically low lattice thermal conductivity due to the presence of numerous Ti vacancies. However, the high carrier concentration limits further improvement of the thermoelectric performance. In this work, Co atoms are employed to substitute Ni atoms in Ti 0.75 Ni 1- x Co x Sb. The results show that Co substitution effectively tunes the valence electron count of Ti 0.75 NiSb and leads to the formation of a NiSb-based metallic impurity phase, which significantly reduces the carrier concentration from 8.04 × 10 21 cm −3 to 2.31 × 10 21 cm −3 . Consequently, the Seebeck coefficient increases significantly from −94 μV/K for the x = 0 sample to −189 μV/K for x = 0.5, while the electronic thermal conductivity drops substantially from 3.52 to 0.87 W/mK at 873 K. Meanwhile, the lattice thermal conductivity increases due to the reduced Ti vacancy concentration (to satisfy the 18-valence-electron rule) and the formation of the metallic impurity phases. Ultimately, a peak zT of ∼0.50 is achieved at 873 K, representing a ∼47% enhancement compared with the Ti 0.75 NiSb alloy. This work demonstrates that the combination of valence electron count modulation and interface engineering is an effective strategy to optimize the thermoelectric performance of half-Heusler systems. Download: Download high-res image (378KB) Download: Download full-size image
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Chemical Engineering Journal Advances
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2026
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IF 6.9
Xiao-Dan Liu,Xiaomin Kang,En-Peng Du,Rui-Di Sun,Jie-Shu Qian,Li Zhou
The electrocatalytic formaldehyde oxidation reaction (FOR) on copper–based catalysts enables anodic hydrogen production and serves as an alternative to the oxygen evolution reaction by lowering the voltage requirement for water electrolysis. However, Cu–based electrocatalysts are constrained by a narrow operating potential window that limits attainable current densities, while insufficient long–term stability further restricts practical application. Herein, simultaneous enhancement of activity and stability is achieved by fabricating rough copper nanosheets on nickel foam (Cu–NF). The rough copper nanosheets increase the density of accessible active sites, enabling current densities up to 500 mA·cm −2 at 0.45 V vs RHE within the limited operating potential window. Moreover, the mechanically robust nickel foam scaffold helps preserve electrode integrity during prolonged anodic operation, while the dynamic Cu 0 /Cu+ surface evolution in the catalytic layer supports sustained activity, enabling stable operation for over 200 h. This work provides a general design guideline for achieving a balanced improvement in activity and durability of copper–based electrodes for formaldehyde oxidation.
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ChemPlusChem
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2026
·Vol. 91
·期 2
·e202500675
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IF 3.1
Kenan Dang,Haiyang Cheng
Selective reduction of nitroaromatics containing reducible groups is of great significance and has attracted the attention in chemical synthesis. Here, a low-cost and easy to operate H 2 O/CO 2 acidic system combined with non-precious metal iron powder was used to prepare amino aromatics without affecting double or triple bond. Under optimized conditions (1 MPa CO 2 , 60°C, 2.5 h), the selectivity of 3-aminostyrene reached 99.4% at 99.2% conversion of 3-nitrostyrene. For the reduction of 4-nitrophenylacetylene (4-NPA) to 4-aminophenylacetylene (4-APA), the conversion of 4-NPA reached 99.5%, and the selectivity to 4-APA could reach 90.5% with 0.2 MPa CO 2 at 60°C in 8 h. The Fe/H 2 O/CO 2 system is also effective for the one-pot transformation including the reduction and hydration of 4-NPA to 4-aminoacetophenone with a high conversion (95.4%) and selectivity (97.7%). After the reaction is completed, the acidic system will self-neutralize by the release of CO 2 . The non-precious metal-acidic system is green, low-cost, and high selective for the reduction of nitroaromatics without affecting the easy reducible groups and the hydration of alkyne group. Graphical A low-cost and easy to operate H 2 O/CO 2 acidic system combined with non-precious metal iron powder was used to prepare amino aromatics without affecting vinyl or alkyne groups. The Fe/H 2 O/CO 2 system is also effective for the one-pot reduction and hydration of nitrophenylacetylene to 4-aminoacetophenone with a high conversion (95.4%) and selectivity (97.7%).
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2026
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IF 6.6
Zhiruo Wu,Huirou Liu,Leyang zhou,Junyu Su,Ximei Chen,Weijun Shen,Linping Yu,Tao Wan,Wanru Liao
The alkaline hydrogen evolution reaction (HER) is crucial for a sustainable hydrogen economy but remains hindered by the slow dissociation of water and the difficult adsorption/desorption of hydrogen intermediates (*H). To address these dual challenges, we introduce a lattice expansion strategy via the incorporation of larger-radius Co 2+ into a NiCoP electrocatalyst. XRD, HRTEM, and XPS analyses reveal a significant lattice expansion of up to 3.2%, which effectively modulates the electronic structure, promoting electron transfer from Co and Ni to P. Electro-response tests further verify that the NiCoP catalyst with optimal lattice expansion control exhibits enhanced water dissociation and an appropriate *H binding capability. These synergistic effects endow the platform with an ultra-low overpotential of 23 mV at −10 mA cm −2 in 1 M KOH. When integrated into an alkaline water electrolyzer, the NiCoP platform requires only a cell voltage of 2.2 V at −500 mA cm −2 and demonstrates superior stability for over 600 h.
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CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Sijie Yan,Xiaoming Qiu,Zifeng Zeng,Siyuan Wang,Junkai Liu,Qingquanyu Tian,Xiaomin Wang
Electrolytic seawater splitting is a crucial technical direction for hydrogen energy development. However, electrode corrosion induced by high-concentration chloride (Cl − ) remains a key bottleneck restricting its large-scale application. Though cobalt‑iron layered double hydroxide (CoFe-LDH) has good intrinsic catalytic activity, it is susceptible to Cl − corrosion, leading to degraded catalytic performance. Herein, this study proposes a research strategy for synthesizing tetraborate ion (B 4 O 7 2− ) intercalation and regulated CoFe-LDH (CoFe-BLDH) via a one-step hydrothermal method. Via DFT calculation, In-situ Raman spectroscopy, and other characterization techniques, it was verified that the intercalation of cyclic B 4 O 7 2− not only endows the catalyst with excellent hydrophilicity, promotes the generation of high-valent active species and regulates electron transfer, but also effectively inhibits the competitive adsorption of Cl − through a unique charge repulsion effect. In an alkaline high-chloride environment (1.0 M KOH + 2.0 M NaCl), this material exhibits remarkable catalytic activity with dual functional properties: oxygen evolution reaction (OER): 284 mV@100 mA cm −2 ; hydrogen evolution reaction (HER): 179 mV@10 mA cm −2 , representing activity improvements of approximately 21.6% and 11.8%. The overall water splitting constructed with CoFe-BLDH delivers a current flux of 100 mA cm −2 at a working voltage of only 1.820 V in a harsh high-chloride system and can exhibit stable performance for more than 100 h. This study provides practical theoretical guidance for improving the performance of layered double hydroxides in high-chloride media.
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危险品化学品经营许可证（带存储）