DALTON TRANSACTIONS
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2025
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IF 3.3
Juan Lei,Yan Zhang,Yujing Wang,Xiaoli Ren,Lijun Cheng,Qinqin He,Shuang Wang
In this work, high valence Mo was introduced to prepare amorphous MNC-LDH (MoNiCo-LDH) for constructing crystalline NCO/amorphous MNC-LDH (crystalline NiCo2O4/amorphous MoNiCo-LDH) composite. The prepared sample exhibited a three-dimensional pompom-like structure composed of ultrathin nanoflakes and a hybrid interface between crystalline and amorphous phase, which benefited good electrochemical performance. The synthesized material showed a specific capacity of 841 C/g at 1 A/g, while retaining 82.3% of its initial capacity at 20 A/g. The assembled NCO/MNC-LDH//AC HSC device exhibited an energy density of 58 Wh/kg when the power density was 850 W/kg. It is noteworthy that even at a power density of 8500 W/kg, an energy density of 37.1 Wh/kg could be sustained. The NCO/MNC-LDH//AC retained 76.3% of its initial specific capacitance and 100% coulombic efficiency after 20000 consecutive charge and discharge cycles, demonstrating excellent cycling stability. Furthermore, the ability of two HSCs connected in series to operate small fans and light up LED lights in various colors indicated the practical applications potential. Therefore, the synthesized NCO/MNC-LDH in this work is a favorable candidate material for supercapacitors, which has guiding significance for designing crystalline/amorphous composite materials for energy storage applications.
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PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 8
·087505
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IF 4.386
Lin Yang,Chunping Wu,Yiran Zhang,Bang Xiao,Anqi Jiao,Ke Li,Ting Chen,Reggie Zhan,He Lin
A mixed potential ammonia sensor using In2O3 sensing electrode was prepared, and its sensing performance was enhanced by adjusting particle size with calcination heating rate as well as the utilization of NiCo2O4 reference electrode. It was found that the sensor with a calcination heating rate of 2 °C min−1 had the best performance, with a sensitivity of −61.27 mV decade−1 at 525 °C, and the TEM results showed that the average particle size was 70.36 nm. Furthermore, the sensor exhibited good stability against oxygen concentration fluctuation. The results also indicated that the mixed potential has a linear relationship with the logarithm of NH3 concentration, suggesting that the ammonia sensors in this study conform to the mixed potential theory. To address the issue that most ammonia sensors are susceptible to NO2 interference, NiCo2O4 was used as reference electrode to replace the Pt reference electrode, which could greatly offset the response of NO2 and improve the sensors selectivity. In summary, the developed In2O3/YSZ/NiCo2O4 sensor exhibited a great potential for NH3 monitoring in SCR systems.
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CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Wenming Zhang,Pin Cao,Zihao Zhang,Yajun Zhao,Yu Zhang,Ling Li,Kun Yang,Xiaowei Li,Lin Gu
Rational design of nanostructured metal oxides with carbon substrates is urgently needed to improve the electrochemical properties of sodium-ion batteries (SIBs). In this paper, the preparation of one-dimensional (1D) metal-organic frameworks grown on polymer(Co/Ni) fiber films via a feasible electrospinning method and in situ growth strategy is reported. After successive carbonization and oxidation heat-treatments, hierarchical heteroatom-doped carbon nanofibers decorated with several nanocomposites (denoted as NiCo 2 O 4 /NiO/carbon nanofibers) were obtained. When their electrochemical properties were evaluated by testing Na half-cells, the resultant sample displayed a high sodium-storage capacity of 210 mAh g −1 after 200 cycles at a current density of 100 mA g −1 and an outstanding rate capability. The enhancement of the sodium-storage performance of NiCo 2 O 4 /NiO/carbon nanofibers was ascribed to the novel structure and the synergistic effect between Co/Ni-Oxide and carbon component. The 1D carbonized nanofibers are well intertwined to form a three-dimensional conductive matrix with heterogeneous particles embedded, which can effectively reduce the ionic diffusion distance and ensure high electronic mobility along their 1D geometry, leading to rapid diffusion kinetics. Furthermore, well-dispersed heterogeneous particles endow the composite high surface to exposure to the electrolyte, which can contribute to a high utilization rate.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Daming Gong,Minglun Lv,Jun Liu,Rui Liu,Yu Cui,Pengfei Ju,Fuhui Wang,Li Liu
With the rapid advancement of electromagnetic technologies, the development of high-performance electromagnetic wave (EMW) absorbing materials is crucial for mitigating radiation, reducing interference, and ensuring information security. In this work, a bioinspired multiscale strategy coupling macroscopic structural design with hierarchical interface engineering was proposed. A gyroid minimal surface was fabricated via high-precision Digital Light Processing (DLP) three-dimensional printing using graphene oxide incorporated photocurable resin to establish a conductive network and customized EMW propagation pathways. Subsequent in-situ growth of NiCo 2 O 4 and polypyrrole (PPy) introduced abundant heterogeneous interfaces and porous microstructures, which synergistically enhanced dielectric loss, magnetic loss, and interfacial polarization while optimizing impedance matching. Benefiting from these multi-level mechanisms, the composite exhibited outstanding broadband absorption performance at relatively small thicknesses. Experimental results demonstrated that the prepared PNGMM2 composite achieved a minimum reflection loss of -57.32 dB at 12.7 GHz with a thickness of 2.67 mm; an effective absorption bandwidth of 6.4 GHz was obtained at 2.42 mm, fully covering the Ku band; and complete coverage of the X band was realized at a thickness of 3.39 mm. This study demonstrates the effective integration of biomimetic architecture, interfacial engineering, and compositional design, offering a feasible pathway toward next-generation lightweight, broadband, and structurally robust EMW absorbers.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
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IF 3.779
Yunzhao Liu,Xiaowei Chi,Qi Han,Yuexiu Du,Jianhua Yang,Yu Liu
Sodium–oxygen (Na−O 2 ) batteries are being extensively studied because of their higher energy efficiency and lower cost compared to those of lithium–oxygen (Li–O 2 ) batteries. However, highly efficient and durable cathode catalysts are very limited, thus considerably hindering the application of Na–O 2 batteries. Herein, a vertically self-standing C@NiCo 2 O 4 nanoneedle arrays (C@NiCo 2 O 4 -NAs) have been delicately designed and fabricated by a facile hydrothermal method . The NiCo 2 O 4 nanoneedles are in-situ grown on the carbon paper , forming an unique urchin-like structure, which is directly used to Na–O 2 batteries as a self-standing and binder-free cathode for the first time. Under a current density of 50 mA g −1 , the Na–O 2 battery containing C@NiCo 2 O 4 -NAs cathode shows a high initial discharge capacity of 6500 mAh g −1 (based on NiCo 2 O 4 material mass) and low over-potential of 0.6 V due to the numerous catalytic sites and high electron mobility of C@NiCo 2 O 4 -NAs. SEM, XPS and FTIR tests have confirmed the formation of thin film-like Na 2 O 2 discharge product on the surface and gaps of NiCo 2 O 4 nanoneedles, and the special film-like structure can facilitate the decomposition of Na 2 O 2 in the subsequent charging process and reduce the over-potential notably. Meanwhile, the robust urchin-like structure of C@NiCo 2 O 4 -NAs renders the Na–O 2 battery a high cyclic stability up to 120 cycles when the specific capacity is limited to be 800 mAh g −1 .
研究领域:
储能
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材料科学
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电化学
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纳米材料
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高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Dongju Fu,Ziyue Zhu,Shaojun Gao,Hui Qi,Xuguang Liu,Weifeng Liu,Shaozhong Zeng
In this paper, hollow Co/N-C@NiCo2O4 spheres assembled by nanoparticles were developed as efficient bifunctional catalysts for zinc–air batteries. The hollow structure is synthesized with ZIF-67 as a reactant template. NiCo-LDH grown on the ZIF-67 surface maintains its structural integrity during heat treatment and reduces the agglomeration of the material, which promotes charge transport during the catalytic process. The hollow structure has a specific surface area of 124.3 m2 g–1 with rich catalytic active sites. As expected, the power density of the Co/N-C@NiCo2O4-based Zn–air battery is 176 mW cm–2 and the specific capacity is 745 mAh g–1, with 1.45 V open-circuit voltage and 100 h cycling life, much better than those of the 20% Pt/C-RuO2-based Zn–air battery (1.42 V, 133 mW cm–2, 721 mAh g–1).
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Reaction Chemistry & Engineering
·
2023
·Vol. 8
·期 10
·2537-2548
·
IF 3.9
Xusheng Yang,Ping Li,Jiahao Wu,Le Zhou,Bin Xu,Xiaobin Zhang,Xiaoqiang Liu,Pingchuan Pan,Weidong Jiang
Nonnoble bicomponent NiCo-based nanocomposites (CuO/NiCo2O4) were prepared by the coprecipitation–calcination method and characterized. Furthermore, the catalytic performance of CuO/NiCo2O4 nanocomposites was investigated in the hydrolytic dehydrogenation of ammonia borane (AB) and tandem hydrogenation of halogenated nitroaromatics. The results show that the CuO/NiCo2O4 nanocomposites have good activity in the tandem hydrogenation of two chloronitrobenzenes (m-CNB, o-CNB), achieving 100% yield of m- and o-chloroaniline (m-CAN, o-CAN) under mild conditions. High turnover frequency (TOF = 296.3 h−1) was achieved for CuO/NiCo2O4. With respect to bromo- or iodonitrobenzenes, CuO/NiCo2O4 displayed moderate or low selectivity, especially for iodonitrobenzenes with complete hydrodeiodination. Noteworthily, the CuO/NiCo2O4 nanocomposite exhibits remarkable recyclability and can be used continuously for more than 11 times without deactivation.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Kan Liu,Wenli Zhang,Man Tang,Zhipeng Wang,Yanqin Yang,Songzhan Li,Hao Long
The performance of supercapacitors not only depends on the structure of the electrode but also relates to the composition of electrode material. The binder-free integrated electrodes were obtained from NiCo 2 O 4 nanosheets grown on nitrogen-doped carbon and Co aggregation (NC/Co) nanowires through a hydrothermal process and subsequent annealing. The NiCo 2 O 4 @NC/Co composite presents the stereostructure with NC/Co nanowire supports and intertwined NiCo 2 O 4 ultrathin nanosheets. The NiCo 2 O 4 @NC/Co electrode demonstrates excellent electrochemical capacitive performances and cycling stability, where it illustrates a splendid specific capacitance of 1112 F g −1 at 1 A g -1 and maintains around 90.7 % of the maximum capacitance after 5000 cycles. Besides, the functionalized asymmetric supercapacitor (ASC) was fabricated based on NiCo 2 O 4 @NC/Co and NC with KOH-PVA solid electrolyte. The NiCo 2 O 4 @NC/Co // NC ASC possesses a stabilized operating potential range of 1.6 V and retains around 81.1 % retention after 5000 cycles. This makes a great potential for Ni-Co multiple compound electrodes for high-performance energy storage systems.
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高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Yanjun Yu,Chen Chen,Yiheng Liu,Hongliang Yu,Shuaijie Li,Yanan Xue,Ning Cai,Jianzhi Wang,Faquan Yu
Developing efficient and cost-effective bifunctional catalytic electrodes is of great importance to water splitting. In this study, hybrid Ni/Ni(OH)2-coated NiCo2O4 nanorods were grown on Ni foam (NF) by a facile growth–conversion–epitaxy approach. The epitaxial decoration of Ni/Ni(OH)2 composite could increase the intrinsic activity of NiCo2O4/NF and enhance the charge-transfer rate. This self-standing hierarchical nanohybrid with unique surface chemistry and interface engineering exhibits an excellent electrocatalytic performance. The optimized Ni/Ni(OH)2-NiCo2O4/NF only requires overpotentials of 53 and 235 mV to reach a current density of 10 mA cm–2 for HER and OER, respectively. The electrolyzer achieved 10 mA cm–2 at a low cell voltage of 1.51 V for water splitting. This work offers a new perspective for rationally designing electrocatalytic materials by surface decoration.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Mengqi Cui,Shan Ji,Zining Wang,Hui Wang,Xuyun Wang,Vladimir Linkov,Rongfang Wang
The development of low-cost, highly effective and stable electrocatalysts is the critical task in worldwide strive towards large-scale hydrogen production via water electrolysis. In this study, S-NiCo 2 O 4 nanorod arrays with well developed grain boundaries are synthesized on the surface of nickel foam by hydrothermal and vapor deposition methods. It is found that the electronic structure of metal active sites can be augmented by controlled doping with sulfur. The optimized S-NiCo 2 O 4 catalyst demonstrates an overpotential of 63 mV at 10 mA cm −2 in the hydrogen evolution reaction and 357 mV at 50 mA cm −2 in the oxygen evolution reaction. This novel synthesis method paves the way to prepare better performing bifunctional electrocatalysts for practical application in water electrolysis.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Meimei Wang,Yunke Cui,Hongyang Cao,Ping Wei,Chen Chen,Xiuyan Li,Juan Xu,Guoping Sheng
In this study, zeolitic imidazolate framework-67 (ZIF-67) derived Co 3 O 4 /NiCo 2 O 4 double-shelled nanocages (DSNCs) were fabricated and utilized as catalysts to activate peroxydisulfate (PDS) for bisphenol A (BPA) degradation. The results showed that Co 3 O 4 /NiCo 2 O 4 DSNCs exhibited superior BPA degradation performance over Co 3 O 4 NCs and NiCo 2 O 4 NCs. PDS combined with the interfaces of both the Co 3 O 4 inner shell and NiCo 2 O 4 outer shell to form complex, inducing the nonradical oxidation of BPA by electron abstraction. The double-shelled hollow structure helped to increase the instantaneous concentration of reactants in the void space of Co 3 O 4 /NiCo 2 O 4 DSNCs, thus promoting the decomposition of BPA. The Co 3 O 4 /NiCo 2 O 4 DSNCs had high selectivity for BPA degradation and were resistant to halogens and background organic matter in wastewater. Our work indicated that metal-organic framework (MOF)-derived nanomaterials with a hollow structure have a promising application prospect for persulfate-based advanced oxidation technology.
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JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Qianzhu Mu,Yanfeng Sun,Aiying Guo,Xiaoyue Xu,Baoping Qin,Aijun Cai
A NiCo 2 O 4 -Au composite was fabricated following the calcination-reduction method and testified to exhibit the intrinsic high peroxidase- and oxidase-like activities. The composite could activate a low level of H 2 O 2 (100 μM) to kill E. coli and S. aureus . NiCo 2 O 4 -Au composite could be easily separated by an external magnet from the media and reused several times. NiCo 2 O 4 -Au composite could also effectively damage the existing biofilms and prevent the formation of new biofilms. The electron spin resonance tests showed that NiCo 2 O 4 -Au composite catalyzed H 2 O 2 into reactive oxygen species (ROS), mainly including OH, O 2 − , and 1 O 2 ; while the oxidase-like activity of NiCo 2 O 4 -Au also stemmed from the ROS formation in the absence of H 2 O 2 . The radical trapping experiment confirmed that O H and 1 O 2 were the main radicals in the antibacterial process for NiCo 2 O 4 -Au in the presence of H 2 O 2 . A NiCo 2 O 4 -Au based Band-Aid was also designed, which exhibited high anti-infective and wound-healing properties. This study has demonstrated that NiCo 2 O 4 -Au composite can be a promising antibacterial agent in environmental and clinical applications.
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