Functional Materials Letters
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2021
·
IF 2.17
Biao Wang,Ya Liu,Xu Huai,Yuqing Miao
In order to develop non-noble metal-based electrocatalysts for glucose oxidation, the Ni-doped, urchin-like Bi 2 S 3 particles were prepared by a solvothermal method using the solvent of ethylene glycol/H 2 O. The obtained products were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The background signal from capacitance current is relatively low and the electrocatalytic oxidation current of glucose relatively high due to the urchin-like nanostructure of Bi 2 S 3 particles and high surface area where the presence of Bi also improves the electrocatalytic performance of Ni I I /Ni I I I shift.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 69
·16392-16401
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IF 4.857
Chenxia Kang,Ju Fang,Likang Fu,Shuxian Li,Qiming Liu
Graphical Supercapacitive nanoarchitectures : A rationally designed 3D hierarchical carbon cloth/nitrogen-doped carbon nanowires/Ni@MnO 2 (CC/N-CNWs/Ni@MnO 2 ) nanocomposite was prepared by electrodeposition and used as a supercapacitor cathode exhibiting high surface area, outstanding electrical conductivity, and excellent performance in supercapacitors. A 3D hierarchical carbon cloth/nitrogen-doped carbon nanowires/Ni@MnO 2 (CC/N-CNWs/Ni@MnO 2 ) nanocomposite electrode was rationally designed and prepared by electrodeposition. The N-CNWs derived from polypyrrole (PPy) nanowires on the carbon cloth have an open framework structure, which greatly increases the contact area between the electrode and electrolyte and provides short diffusion paths. The incorporation of the Ni layer between the N-CNWs and MnO 2 is beneficial for significantly enhancing the electrical conductivity and boosting fast charge transfer as well as improving the charge-collection capacity. Thus, the as-prepared 3D hierarchical CC/N-CNWs/Ni@MnO 2 electrode exhibits a higher specific capacitance of 571.4 F g −1 compared with those of CC/N-CNWs@MnO 2 (311 F g −1 ), CC/Ni@MnO 2 (196.6 F g −1 ), and CC@MnO 2 (186.1 F g −1 ) at 1 A g −1 and remarkable rate capability (367.5 F g −1 at 10 A g −1 ). Moreover, asymmetric supercapacitors constructed with CC/N-CNWs/Ni@MnO 2 as cathode material and activated carbon as anode material deliver an impressive energy density of 36.4 W h kg −1 at a power density of 900 W kg −1 and a good cycling life (72.8 % capacitance retention after 3500 cycles). This study paves a low-cost and simple way to design a hierarchical nanocomposite electrode with large surface area and superior electrical conductivity, which has wide application prospects in high-performance supercapacitors.
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高影响因子
IONICS
·
2021
·Vol. 27
·期 8
·3543-3551
·
IF 2.817
Zhang Chen,Wang Qing,Zhang Wanqi,Li Xiang,Zhu Zerui,Zhang Chenlei,Xie Aijuan,Luo Shiping
Co 3 O 4 -Ni-MOF composite was successfully prepared by solvent-thermal method and then was combined with acidified multi-walled carbon nanotubes (MWCNTs); the resulting Co 3 O 4 -Ni-MOF/MWCNTs hybrid was applied in supercapacitor and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM). The electrochemical tests including cyclic voltammetric (CV), galvanostatic charge and discharge (GCD), electrochemical impedance spectroscopy (EIS), and cycle life were also performed to investigate the supercapacitor properties of the as-prepared materials. The experimental results show that when the molar ratio of metal oxide material and Ni-MOF material is 1:1, Co 3 O 4 -Ni-MOF material displays better electrochemical performance. As the mass ratio of Co 3 O 4 -Ni-MOF and MWCNTs is 1:1, Co 3 O 4 -Ni-MOF/MWCNTs hybrid exhibits lower Rct value, higher cyclic capacitance stability, and better supercapacitor performance. Therefore, Co 3 O 4 -Ni-MOF/MWCNTs hybrid as an electrode material has a relatively ideal application prospect in terms of supercapacitor materials. Graphical abstract
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高影响因子
MOLECULES
·
2021
·Vol. 26
·期 15
·4517
·
IF 4.412
Ye Tian,Qi Wang,Zhijian Peng,Shundong Guan,Xiuli Fu
A novel product consisting of a homogeneous tin oxide nanowall array with abundant oxygen deficiencies and partial Ni-Sn alloying onto a Ni foam substrate was successfully prepared using a facile solvothermal synthesis process with subsequent thermal treatment in a reductive atmosphere. Such a product could be directly used as integrated anodes for supercapacitors, which showed outstanding electrochemical properties with a maximum specific capacitance of 31.50 mAh·g−1at 0.1 A·g−1, as well as good cycling performance, with a 1.35-fold increase in capacitance after 10,000 cycles. An asymmetric supercapacitor composed of the obtained product as the anode and activated carbon as the cathode was shown to achieve a high potential window of 1.4 V. The excellent electrochemical performance of the obtained product is mainly ascribed to the hierarchical structure provided by the integrated, vertically grown nanowall array on 3D Ni foam, the existence of oxygen deficiency and the formation of Ni-Sn alloys in the nanostructures. This work provides a general strategy for preparing other high-performance metal oxide electrodes for electrochemical applications.Keywords:integrated anode;supercapacitor;nanowall array;oxygen-deficient tin oxide;Ni-Sn alloys
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高影响因子
FUEL
·
2019
·
IF 5.128
Xue-Ke Li,Zhi-Min Zong,Yi-Feng Chen,Zheng Yang,Guang-Hui Liu,Fang-Jing Liu,Xian-Yong Wei,Bao-Jun Wang,Feng-Yun Ma,Jing-Mei Liu
A highly active difunctional Ni-Mg 2 Si/γ-Al 2 O 3 was prepared by thermally decomposing nickel tetracarbonyl onto γ-Al 2 O 3 impregnated with Mg 2 Si. The non-catalytic hydroconversion (NCHC) and catalytic hydroconversion (CHC) of the extract ( E ) and extraction residue (ER) from Yinggemajianfeng lignite were investigated over Ni-Mg 2 Si/γ-Al 2 O 3 at 240 °C in n -hexane. Benzyloxybenzene and oxybis(methylene)dibenzene were used as lignite-related model compounds to speculate the possible mechanisms for the catalytic hydrocracking and hydrogenation over Ni-Mg 2 Si/γ-Al 2 O 3 . As a result, more organic matter in ER was converted to soluble portion (SP) by the CHC than by the NCHC. The main SP from the CHC are chain alkanes and cyclanes, while that from the NCHC is rich in arenes and oxygen-containing organic compounds. The results indicate that Ni-Mg 2 Si/γ-Al 2 O 3 effectively catalyze the hydrocracking of >C alk –O– linkages and the hydrogenation of aromatic rings in E and ER.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Jiacheng Guo,Xingwu Guo,Jiyong Zeng,Lewen Nie,Jie Dong,Liming Peng,Wenjiang Ding
The purpose of this study is to prepare porous Zn-Ni coating with high infrared emissivity at a lower current density (1 A/cm 2 ) by using dynamic hydrogen bubble template (DHBT) method. Three types of ceramic micro-particles (Al 2 O 3 , SiO 2 and TiO 2 ) are introduced into the electrolyte to investigate their effects on the surface morphology and infrared emissivity of Zn-Ni coating. The results show that uniform porous coatings can be obtained when these micro-particles are added into the electrolyte. The suspended micro-particles in electrolyte can prevent the H 2 bubbles from rising up and escaping from the cathode, which is beneficial to the formation of porous structure, especially the insulating micro-particles, Al 2 O 3 and SiO 2 . The uniform porous structure containing ceramic micro-particles is beneficial to improve infrared emissivity. In addition, the infrared emissivity of porous composite coating is also significantly dependents on the type of ceramic particles inside pores. Among the three types of micro-particles, TiO 2 micro-particles have the greatest effect on the improvement of infrared emissivity which is increased from 0.83 to 0.91 when TiO 2 micro-particles are deposited into the Zn-Ni coating.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Libin Zhuang,Jiaqi Li,Jian Xue,Zhouyang Jiang,Haihui Wang
Adding metal phase as the electronic transport channels in mixed protonic and electronic conductors is an effective method to enhance the conductivity and hydrogen permeability. Ceramic-metal (cermet) Ni-BaCe 0.85 Fe 0.15 O 3-δ (Ni-BCF8515) dual-phase membranes were successfully fabricated in this article, where BaCe 0.85 Fe 0.15 O 3-δ (BCF8515) served as the protonic conductor and Ni acted as the electronic conductor. The hydrogen permeability of Ni-BCF8515 dual-phase membrane was improved apparently, reaching 0.325 mL min −1 cm −2 at 1000 °C, which is four times higher than that of the single phase BCF8515 membrane. Hydrogen permeability of Ni-BCF8515 dual-phase membrane under different hydration conditions was studied here. Moreover, Ni-BCF8515 dual-phase membrane showed stable hydrogen permeability under the reducing atmosphere for 50 h.
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高影响因子
NANO
·
2019
·
IF 1.293
Shuwen Gao,Yanwei Sui,Fuxiang Wei,Jiqiu Qi,Qingkun Meng,Yaojian Ren,Yezeng He
A series of nickel sulfides derived from the hexagonal Ni-MOF are vulcanized through adjusting the hydrothermal time and the thiourea concentration. Among all the obtained nickel sulfides, one sample Ni-S2-3, which inherits the Ni-MOF’s morphology, shows the best electrochemical performance with a remarkable specific capacitance of 1128 Fg − 1 at 1 Ag − 1 , a rate capacitance of 50% and a long cycle life of 74% retention after 5000 cycles. Furthermore, the asymmetrical supercapacitors (SCs) based on Ni-S2-3//AC exhibit a good supercapacitive performance with a maximum power density of 16.3 Wh kg − 1 at a power density of 800 Wkg − 1 . All these results indicate that vulcanizing Ni-MOF is an effective way to fabricate a superior electrode material with excellent electrochemical performance for SCs.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Ying Cao,Huixiang Wang,Ruimin Ding,Liancheng Wang,Zhong Liu,Baoliang Lv
Ni modified MoO 3 (Ni-MoO 3 ) had been synthesized by a facile one-step hydrothermal technique and was used for oxidative desulfurization (ODS) of dibenzothiophene (DBT) in the decalin/acetonitrile biphasic system with H 2 O 2 as oxidant, the effect of different operating conditions was investigated. Under the optimal reaction condition, Ni-MoO 3 catalyst showed excellent ODS performance toward DBT, the highest sulfur removal efficiency can be up to 99.8% and sulfur content was wiped out from 5000 to 10 ppm, which is more effective than the recent reported MoO 3 -based catalysts. The reaction kinetics obeyed the pseudo-first-order equation with an apparent rate constant of 0.076 min −1 , which is twice that of pure MoO 3 (0.035 min −1 ). The ODS mechanism of DBT with Ni-MoO 3 was explored by combining radical scavenger, FT-IR experiments and theoretical analysis, proving that surface oxygen vacancies and Lewis acid sites play important roles in the high-efficiency ODS reaction with Ni-MoO 3 catalyst.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Hengrui Qiu,Shengli An,Xuejiao Sun,Huimin Yang,Yongqiang Zhang,Wenxiu He
Due to the unconventional properties of MWCNTs-GONRs (multiwalled carbon nanotubes-graphene oxide nanoribbons), we have tried to use it as a carbon resource for supercapacitors . MWCNTs-GONRs/Ni(OH) 2 electrode was obtained by hydrothermal method . Velvet α-Ni(OH) 2 was prepared above NF (nickel-foam) loaded with MWCNTs-GONRs. This layered design can effectively promote the diffusion of ions and increase the active site for MWCNTs-GONRs/Ni(OH) 2 electrode, thus enhancing the electrochemical performance. The electrode exhibits extraordinary electrochemical performances in electrochemical testing, such as supernal specific capacitance (1713.2 F g −1 ) and prominent working time. In addition, supercapacitors was assembled with MWCNTs-GONRs/Ni(OH) 2 and active carbon as materials. Which represents a prominent energy density (41.23 Wh kg −1 ), high power (6.80 kW kg −1 ) and prominent cycling stability property (95.18%, 3000 times). The electrode prepared in this work provides a clue to enlighten people for energy storage.
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高影响因子
Journal of Environmental Sciences
·
2016
·
IF 2.208
Cancan Xu,Rui Liu,Lvjun Chen,Jialu Tang
Ni/Fe-Fe 3 O 4 nanocomposites were synthesized for dechlorination of 2,4-dichlorophenol (2,4-DCP). The effects of the Ni content in Ni/Fe-Fe 3 O 4 nanocomposites, solution pH, and common dissolved ions on the dechlorination efficiency were investigated, in addition to the reusability of the nanocomposites. The results showed that increasing content of Ni in Ni/Fe–Fe 3 O 4 nanocomposites, from 1 to 5 wt.%, greatly increased the dechlorination efficiency; the Ni/Fe–Fe 3 O 4 nanocomposites had much higher dechlorination efficiency than bare Ni/Fe nanoparticles . Ni content of 5 wt.% and initial pH below 6.0 was found to be the optimal conditions for the catalytic dechlorination of 2,4-DCP. Both 2,4-DCP and the intermediate product 2-chlorophenol (2-CP) were completely removed, and the concentration of the final product phenol was close to the theoretical phenol production from complete dechlorination of 20 mg/L of 2,4-DCP, after 3 hr reaction at initial pH value of 6.0, 3 g/L Ni/Fe-Fe 3 O 4 , 5 wt.% Ni content in the composite, and temperature of 22°C. 2,4-DCP dechlorination was enhanced by Cl − and inhibited by NO 3 − and SO 4 2 − . The nanocomposites were easily separated from the solution by an applied magnetic field. When the catalyst was reused, the removal efficiency of 2,4-DCP was almost 100% for the first seven uses, and gradually decreased to 75% in cycles 8–10. Therefore, the Ni/Fe–Fe 3 O 4 nanocomposites can be considered as a potentially effective tool for remediation of pollution by 2,4-DCP.
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高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xiaogang Guo,Xueming Li,Zhibo Wei,Xiaolin Li,Lidan Niu
Superhydrophobic tri-dimensional Ni/Al coatings (3DNACs) with great application value have been successfully fabricated via a simple two-step method combined with hydrogen bubble dynamic template and electrophoretic deposition technique after 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane treatment. The surface morphologies and chemical compositions were analyzed by FE-SEM, EDS, XRD, AFM and FT-IR in detail. The water contact angle of superhydrophobic 3DNACs surface was as high as 156 ± 2° (>150) much larger than that of unmodified samples. Moreover, the obtained samples exhibited great thermal properties and combustion performance. Thus, the superhydrophobic 3DNACs with prominent exothermic capability turn out to be a promising novel energy in field of mirco/nano energy materials for longer-term storage or transportation, especially in high humid environment.
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高影响因子
危险品化学品经营许可证（带存储）