International Journal of Electrochemical Science
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2023
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IF 1.5
Yuxi Yang
In this work, Ni-Zn-doped porous carbon materials (Ni@C) with regular dodecahedral morphologies were synthesized by calcination of Ni-doped ZIF-8 as a template, and applied in electrochemical sensing and quantitative electrochemical sensors to detect Hydroquinone (HQ), The uniformly dispersed Ni in Ni@C serves as the catalytically active material, and the synergistic effect of elemental Zn and porous carbon improves the electron transport efficiency of the material. The developed Ni@C electrochemical sensor detected HQ alone with a sensitivity of 180 μA μM -1 cm -2 and a linear range of 9.1 nM-80 μM. The results demonstrate that the enzyme-free electrochemical sensor based on Ni@C/GCE exhibits good sensitivity, a wide linear range and excellent selectivity. At the same time, the problem of the general conductivity of metal-organic framework (MOF) materials is solved, which provides a new idea for the application of such new materials in the direction of electrochemistry.
研究领域:
分析化学
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材料科学
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电化学
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生物医学工程
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环境监测
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2015
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IF 2.711
Yixuan Song,Tingting Qiang,Ming Ye,Qiuyang Ma,Zhen Fang
Design an effective absorbent that has high surface area, and perfect recyclable is imperative for pollution elimination. Herein, we report a facile two-step strategy to fabricate magnetically separable 3-dimensional (3D) hierarchical carbon-coated nickel (Ni@C) nanocomposites by calcinating nickel based metal organic framework (Ni 3 (OH) 2 (C 8 H 4 O 4 ) 2 (H 2 O) 4 ). SEM and TEM images illuminate that the nanocomposites were constructed by 8 nm nickel nanoparticle encapsulated in 3D flake like carbon. The specific surface area of the obtained nanocomposites is up to 120.38 m 2 g −1 . Room temperature magnetic measurement indicates the nanocomposites show soft magnetism property, which endows the nanocomposites with an ideal fast magnetic separable property. The maximum adsorption capacity of the nanocomposites for rhodamine B is 84.5 mg g −1 . Furthermore, the nanocomposites also exhibit a high adsorption capacity for heavy metal ions. The adsorbent can be very easily separated from the solution by using a common magnet without exterior energy. The as-prepared Ni@C nanocomposites can apply in waste water treatment on a large-scale as a new adsorbent with high efficiency and excellent recyclability.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
LANGMUIR
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2025
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IF 3.9
Xiaowei Ma,Lin Tan,Jiaqi Xu,Jiaoyang Hao
Metal–organic frameworks (MOFs) exhibit highly adjustable porosity, structure, and versatility, properties that render them promising for electromagnetic wave (EMW) absorption applications. However, the impedance matching of these composites is poor in practical applications, thereby compromising their EMW absorption performance. In this study, a novel EMW absorbing composite was synthesized by a solution-thermal method combined with a subsequent pyrolysis process. Specifically, we introduced heteroatom (N and S) codoped graphene (N, S-Gr) into the Co–Ni MOF, forming N, S-Gr/CoNi/C. Graphene was endowed with abundant defect and disorder sites through the codoping of nitrogen and sulfur, which enhanced interfacial polarization and dipole polarization. When nickel and cobalt were added in a 1:1 ratio, the minimum reflection loss (RLmin) of the N, S-Gr/Co–Ni/C composite reached −47.7 dB at 4.24 GHz, and the resultant material exhibited the best absorption properties. As a result, this composite is considered to be an ideal candidate for the development of highly effective EMW absorbers.
研究领域:
材料科学
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电磁学
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DOI
PubMed
高影响因子
CARBON
·
2026
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IF 12.7
Huimin Xie,Wenhui Liu,Linkun Wu,Liping Zhang,Yuxiang Wang,Zaizhe Cheng,Xiucheng Sun,Shuhao Wei,Guojun Lan,Ying Li
Ni-phyllosilicate hard-templating yields sintering-resistant mesoporous Ni–C catalysts. • Achieves high-loading, ultrafine Ni NPs via a confined interfacial layer. • Enhanced SMSI and anti-leaching stability are confirmed by multi-technique analysis. • Superior LA-to-GVL hydrogenation: 99.7% conversion, 99.3% selectivity. • A general design for high-performance non-noble metal-carbon hydrogenation catalysts. Carbon-encapsulated metal catalysts prepared by in-situ carbonization generally suffer from severe metal sintering during high-temperature treatment. Herein, we develop a nickel phyllosilicate-assisted hard-templating strategy to construct mesoporous Ni–C catalysts with ultrafine, high-loading Ni nanoparticles partially embedded in the carbon support. A Ni 3 Si 2 O 5 (OH) 4 interfacial layer is pre-formed via ammonia evaporation prior to carbonization, which effectively inhibits Ni sintering and strengthens the metal-support interaction. The embedded structure generates charge-polarized Ni δ+ –Ni δ– sites that promote hydrogen dissociation and spillover, and enable synergistic activation of levulinic acid and H 2 . Under mild conditions (S/C = 50, 160 °C, 1 MPa H 2 ), the optimized Ni–C–p catalyst achieves 99.7% LA conversion and 99.3% γ-valerolactone selectivity within 2 h, with a reaction rate approximately three times that of conventional impregnated Ni/C. This strategy exhibits good universality for designing other non-noble metal-carbon composites toward challenging liquid-phase hydrogenation reactions. Download: Download high-res image (290KB) Download: Download full-size image
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Binkai Yuan,Guibin Tan,Gengzhe Shen,Liuyan Zhang,Xinyu Tian,Yang Yang,Suye Li,Yidong Huang,Xingyu Zhu,Zeyi Guan,Fujian Guo,Yanmei Zhang
To overcome waterborne epoxy coating’s limitations (poor long-term corrosion resistance, insufficient self-healing, microdefect-induced penetration), this study developed a high-performance smart anti-corrosion coating modified with MXene-Ni@C-ODD composite filler and regulated by magnetic field. The filler was facilely prepared via pyrolysis of MXene-Ni-MOFs (Ti 3 C 2 T x −Ni 3 HHTP 2 ) and subsequent loading of ODD(1-(2-Aminoethyl)-2-heptadecenyl-2-imidazoline, diethylsulfate salt). Electrochemical tests in 3.5 wt% NaCl showed the magnetically regulated (MMO) coating exhibited optimal performance, outperforming Blank, ODD, and MO coatings: after 60-day immersion, its achieved a charge transfer resistance ( R ct ) of 1.02 × 10 10 Ω·cm 2 (7.2 times that of the Blank coating; corrosion current density ( i corr ) of 1.78 × 10 −13 A·cm −2 (1/2.6 of that of the Blank coating) and corrosion potential ( E corr ) of −0.1791 V. MXene-Ni@C’s mesoporous structure (specific surface area: 147.812 m 2 /g) mitigates ODD-induced epoxy curing interference and enables responsive ODD release, while its ferromagnetism (saturation magnetization: 10.59 emu/g) allows magnetic field-driven parallel filler alignment. Scratch tests confirmed self-healing ability via ODD release triggered by exposed metal substrate’s electronegativity. This “magnetically enhanced physical barrier + ODD self-healing” synergy support for high-performance smart anti-corrosion coatings.
研究领域:
材料科学
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腐蚀工程
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智能涂层
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纳米复合材料
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电化学
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产品关联
DOI
高影响因子
CARBON
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2021
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IF 9.594
Zhen Xiang,Xiang Zhang,Yuyang Shi,Lei Cai,Jie Cheng,Haojie Jiang,Xiaojie Zhu,Yanyan Dong,Wei Lu
Developing high-efficiency electromagnetic wave absorption materials with versatility has been a hotspot and it remains a huge challenge. Here, we reported versatile laminated Ni nanoparticles @ porous carbon (Ni@C) nanocomposites synthesized by a facile carbonization of Ni-based metal-organic frameworks (MOFs) precursor. It was found that the phase components (Ni and C phases) and nano/microstructure (laminated and porous characterizations) were well-modified by controlling the calcination temperature, which led to the variation of the degree of graphitization , magnetic properties , and electromagnetic performances. It showed that the laminated porous Ni@C nanocomposites achieved enhanced microwave absorption performances with a thin thickness of 1.5 mm, a strong reflection loss of −59.8 dB and an effective absorption bandwidth of 4.5 GHz. The underlying microwave absorption mechanism was owing to the improved synergistic effects of polarization relaxation, electron transport , ferromagnetic resonance, as well as multiple reflections and scattering in the laminated porous Ni@C nanocomposites. Furthermore, the multicomponent and laminated porous architecture endowed nanocomposites with favorable waterproof, heat isolation and infrared shielding versatility. Therefore, this work demonstrated a facile approach to develop MOFs-derived versatile laminated porous nanocomposites with efficient microwave absorbing performances.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Tengyu Zhang,Meijia Liu,Can Li,Jiwei Zhang,Hui Gao,Fangong Kong,Xuezhang Xiao
Magnesium hydride (MgH 2 ) emerges as a cost-effective and high-capacity hydrogen storage candidate. Despite these advantages, its utilization is constrained by sluggish reaction kinetics and the requirement for elevated operating temperatures. In this study, we aim to address these limitations by investigating the synergistic catalytic effect of yttrium fluoride (YF 3 ) and nickel-loaded nitrogen self-doped porous carbon (Ni/C) as catalysts for MgH 2 . Co-doping with YF 3 and Ni/C reduces the dehydrogenation activation energy to 74.56 kJ/mol, enabling 5.22 wt% H 2 desorption within 5 min at 300 °C. Notably, the system exhibits enhanced low-temperature reaction kinetics, with the MgH 2 -YF 3 + Ni/C composite releasing 5.74 wt% H 2 at 250 °C within 30 min. At 50 °C, the co-doped composite achieves a hydrogen storage capacity of 5.18 wt% within 4 h, whereas the composite with Ni/C only absorbs 3.72 wt% H 2 . Moreover, the MgH 2 -YF 3 + Ni/C shows 98.4 % capacity retention after 30 cycles, indicating excellent reversibility. Mechanistic analysis reveals that the outstanding catalytic performance originates from the synergistic effect among YH 2 /YH 3 , MgF 2 , Mg 2 Ni/Mg 2 NiH 4 , and nitrogen-doped carbon. YH 2 /YH 3 and Mg 2 Ni/Mg 2 NiH 4 act as “hydrogen pump”, providing more active sites for the reaction. Additionally, MgF 2 functions as an electron transfer medium, weakening the Mg-H bond. The introduction of nitrogen self-doped porous carbon improves the dispersion of the catalyst and prevents aggregation, enhancing the dissociation of hydrogen molecules. This work demonstrates a promising strategy for improving the low-temperature hydrogen storage performance of MgH 2 and offers insights into the design of rare-earth fluoride-based catalysts.
研究领域:
材料科学
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能源化学
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催化化学
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产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
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2025
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IF 6.4
Ting Wu,Jianpeng Sun,Zhan Zhao,Kelei Huang,Xiangchao Meng
Modulation of d-band center of Ni to achieve an equilibrium between H-adsorption and Hdesorption (H ads /H des ) remains a great challenge. Herein, Ni@C derived from MOFs was treated by ultraviolet light. It was found that sp 2 edge carbon were converted to sp 3 defective carbon and further combined with Ni clusters. Experimental and theoretical calculations confirmed that the enhanced d-p orbital hybridization between C-Ni promoted a large negative shift of the dband center of Ni, which was in favor of improving the HER activity of the catalyst. Moreover, the core-shell structure of carbon-coated Ni effectively protected the Ni sites and improved its catalytic stability when applied in electrocatalytic water splitting. As a result, as-prepared UV-Ni@C/NF exhibited excellent HER activity in both alkaline aqueous solution (overpotential of 309 mV at 1000 mA cm -2 ) and acidic aqueous solution (overpotential of 446 mV at 1000 mA cm -2 ). This study indicated the UV-illumination-induced defects method as a feasible strategy to precisely regulate the d-band center of Ni.
研究领域:
材料科学
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电化学
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纳米技术
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催化
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能量转换
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产品关联
DOI
高影响因子
Nature Communications
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2026
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IF 18.1
Zhao Jun,Yang Jianlong,Wang Duanda,Zhang Huanrong,Jia Qianqian,Zhang Lei,An Zhenguo,Xue Mianqi,Xie Haijiao,Ma Wangjing,Zhang Lu,Zhao Sui,Tang Junwang
The catalytic upcycling of plastic mixtures into H 2 and carbon nanotubes (CNTs) represents a transformative strategy for advancing plastic management and the circular economy. Herein, an in-situ constructed high-performance FeNi/Ni/C catalyst combined with prompt microwave catalysis enables efficient conversion of LDPE-PVC, LDPE-HDPE-PP-PS-PVC-PTFE and landfilled waste mixture into valuable H 2 and CNTs, resulting in near-quantitative atom economy (i.e., H 2 and carbon efficiencies are nearly 100%) together with H 2 and CNTs yields reaching >922 mmol g -1 catalyst and >10600 mg g -1 catalyst , respectively. Furthermore, this microwave catalysis strategy presents an excellent stability (>35 cycles) via Cl/F-based regeneration and energy efficiency (80% reduction vs. traditional thermal catalysis), alongside a high turnover number of 107.6 mol carbon mol -1 NiFe . Fundamentally, the Ni species contribute to C-H breaking, and Fe is beneficial for CNT formation during plastic decomposition. Here, we show a cost-effective platform for upcycling of chlorinated/fluorinated plastic mixtures, aligning with resource circularity objectives.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Wanyu Li,Yu Xiao,Rui Yao,Jinping Li,Guang Liu
Solution-reduced nano-Mg is uniformly dispersed in flower-like Ni/C(D). • Mg 2 Ni/Mg 2 NiH 4 pump and carbon confinement synergistically enhance kinetics. • 100% capacity retention over 90 cycles after activation. A rationally designed Mg-Ni/C(D) composite was synthesized by calcining a hydrothermally prepared Ni-MOF(BDC) precursor (from Ni 2 + and terephthalic acid, H 2 BDC) into flower-like porous Ni/C(D), followed by Mg loading via lithium-naphthalenide reduction. Spherical Ni/C(T) was prepared similarly using trimesic acid (H 3 BTC). Compared with Ni/C(T), Ni/C(D) possesses an effective hierarchical porous structure, enabling a higher effective reversible hydrogen storage capacity (based on the total composite mass) at a comparable dehydrogenation onset temperature. During hydrogen sorption, in situ-formed Mg 2 Ni acts as a reversible Mg 2 NiH 4 /Mg 2 Ni hydrogen pump, lowering the kinetic barrier and providing nucleation sites for the Mg/MgH 2 transformation, while the carbon matrix confines nanoparticles to prevent agglomeration. Notably, after 10 activation cycles, it retains nearly 100% capacity over the next 90 cycles. This synergy between catalytic pumping and nanoconfinement makes Mg-Ni/C(D) promising for solid-state hydrogen storage. Download: Download high-res image (156KB) Download: Download full-size image Through in situ lithium-naphthalenide reduction, nano-Mg is uniformly embedded in the flower-like Ni/C(D) scaffold. The Mg 2 Ni/Mg 2 NiH 4 hydrogen pump, coupled with carbon nanoconfinement, effectively lowers the kinetic barriers via interfacial electron transfer and hydrogen diffusion, yielding a low onset temperature of 223.38 °C and 100% capacity retention over 90 cycles after activation. This work demonstrates a rational strategy for designing high-performance Mg-based hydrogen storage materials.
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DOI
高影响因子
VACUUM
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2025
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IF 3.9
Penggen Chen,Jianhao Wang,Xingyue Lu,Li-An Ma,Qiong Liu,Lizhen Liu,Xiaoyun Ye,Qianting Wang
To address the growing need for high-performance microwave absorbing materials in modern communication and radar technologies, this study proposes a hierarchical heterostructured engineering strategy to integrate multiple loss mechanisms and optimize electromagnetic wave absorption. The hierarchical heterostructured C/TiO 2 /Ni@C composites were constructed via in situ hydrothermal synthesis combined with high-temperature calcination. The microwave absorption properties of the composite can be tuned by adjusting the MXene doping level and pyrolysis temperature. The TiO 2 /C framework derived from MXene and porous Ni@C microspheres derived from Ni-MOF enhance dielectric losses (interfacial polarization and dipole relaxation). The precipitated Ni magnetic nanoparticles improve magnetic losses. Compared with traditional microwave absorbing materials such as single-phase carbon or metal oxides, the C/TiO 2 /Ni@C-2 composite thermally decomposed at 600 °C exhibits excellent microwave absorption properties with an optimal reflection loss of −57 dB at a thickness of 4.26 mm and a frequency of 7.1 GHz. Upon optimization to a thickness of 2.16 mm, its effective absorption bandwidth (EAB) extends to 5.34 GHz (12.43–17.77 GHz), thereby fully encompassing the Ku band. The exceptional microwave absorption performance is attributed to its distinctive magnetic-dielectric layered architecture, heterointerface synergy, and optimized impedance matching, offering critical insights for designing next-generation broadband microwave absorbers.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Zongsheng Chen,Yanxi Ma,Hui Kang,Ting Liu,Hao Song,Ludan Chen,Yingluo He
The development of highly active catalysts for the catalytic conversion of oxygen-containing aromatics in lignite under mild conditions is of crucial importance for the production of clean liquid fuels. In this study, an in situ nitrogen-doped carbon-coated Ni@C/g-C 3 N 4 catalyst was fabricated. The abundant lone-pair electrons on nitrogen atoms within the g-C 3 N 4 support can coordinate with nickel, facilitating the migration of electrons toward the nickel surface. This electron transfer process favors the formation of Ni δ+ active sites with low electron cloud density, thereby enhancing the hydrogenation catalytic activity of the catalyst. The catalyst exhibited exceptional performance in lignite hydrodeoxygenation (HDO): under conditions of 80 °C, 1.5 MPa H 2 , and a reaction time of 1.5 h, 100% conversion of the lignite model compound benzyl phenyl ether (BOB) was achieved. Furthermore, the catalyst demonstrated remarkable hydrodeoxygenation activity, with high selectivity toward various oxygen-containing model compounds, including methyl nonanoate and 2,6-dimethylphenol. The optimal catalyst was applied to the catalytic conversion of the soluble portion (SP) of Naomaohu coal (NMHC). Results indicated that, compared with the SP, the hydrogenated soluble products from catalytic hydrogenation conversion (SP CHC ) showed a significant increase in the variety and quantity of aromatic and alkane compounds, while the relative contents of phenols, alcohols, esters, and ethers were reduced. These findings fully confirm that the Ni@C/g-C 3 N 4 catalyst can effectively cleave C C and C O bonds during the hydrogenation conversion of the SP, providing theoretical guidance for the conversion of lignite into high-quality clean liquid fuels.
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DOI
高影响因子
危险品化学品经营许可证（带存储）