Nanomaterials
·
2022
·Vol. 12
·期 17
·2994
·
IF 5.719
Daojun Zhang,Bei Jiang,Chengxiang Li,Hao Bian,Yang Liu,Yingping Bu,Renchun Zhang,Jingchao Zhang
Electrochemical energy storage devices (EESDs) have caused widespread concern, ascribed to the increasing depletion of traditional fossil energy and environmental pollution. In recent years, nickel cobalt bimetallic sulfides have been regarded as the most attractive electrode materials for super-performance EESDs due to their relatively low cost and multiple electrochemical reaction sites. In this work, NiCo-bimetallic sulfide NixCo3−xS4particles were synthesized in a mixed solvent system with different proportion of Ni and Co salts added. In order to improve the electrochemical performance of optimized Ni2.5Co0.5S4electrode, the Ni2.5Co0.5S4particles were annealed at 350 °C for 60 min (denoted as Ni2.5Co0.5S4-350), and the capacity and rate performance of Ni2.5Co0.5S4-350 was greatly improved. An aqueous NiCo-Zn battery was assembled by utilizing Ni2.5Co0.5S4-350 pressed onto Ni form as cathode and commercial Zn sheet as anode. The NiCo-Zn battery based on Ni2.5Co0.5S4-350 cathode electrode delivers a high specific capacity of 232 mAh g−1at 1 A g−1and satisfactory cycling performance (65% capacity retention after 1000 repeated cycles at 8 A g−1). The as-assembled NiCo-Zn battery deliver a high specific energy of 394.6 Wh kg−1and long-term cycling ability. The results suggest that Ni2.5Co0.5S4-350 electrode has possible applications in the field of alkaline aqueous rechargeable electrochemical energy storage devices for supercapacitor and NiCo-Zn battery.Keywords:NixCo3−xS4structures;micro/nanostructures;supercapacitors;Ni-Zn batteries
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Zhengwei Wu,Jiawen Bao,Hongyang Zhang,Yingying Luo,Zhonglu You
Molecular nanoclusters comprising heterometallic Ni-Zn cores are an interesting class of compounds. In this paper, five novel Ni II -Zn II complexes [Ni 2 Zn 2 ClL 3 (HL) 3 ]·0·.25H 2 O ( 1 ), [Ni 2 Zn 2 BrL 3 (HL) 3 ]·0·.25H 2 O ( 2 ), [Ni 2 Zn 2 Br 2 L 2 (N 3 ) 2 (MeOH) 2 ]·2MeOH ( 3 ), [Ni 2 Zn 2 I 2 L 2 (N 3 ) 2 (MeOH) 2 ]·2MeOH ( 4 ), and [Ni 2 Zn 2 I 2 L 2 (N 3 ) 2 (DMF) 2 ] ( 5 ), were prepared from the Schiff base 2-(3-ethoxy-2-hydroxybenzylideneamino)-4-methylphenol (H 2 L). The complexes have been characterized by elemental analysis, IR, UV–Vis spectra. Molecular structures of the complexes have been determined by single crystal X-ray determination. In complexes 1 and 2 , three of the Schiff bases coordinate to the metal atoms via ether oxygen, imino nitrogen and two phenolate oxygen atoms, while the fourth one coordinates through ether oxygen, imino nitrogen and one phenolate oxygen atoms. In complexes 3 , 4 and 5 , all the donor atoms in the Schiff base ligands participate in coordination. The Ni and Zn atoms in the complexes are in octahedral and trigonal bipyramidal coordination, respectively. The anions of the metal salts and the azide anion, as well as methanol and DMF molecules furnish the coordination sphere. The compounds were evaluated for their antibacterial activities on Bacillus subtilis , Staphylococcus aureus , Escherichia coli and Pseudomonas fluorescens , and antifungal activities on Candida albicans and Aspergillus niger . Interestingly, the complexes have effective activities against Bacillus subtilis and Staphylococcus aureus .
研究领域:
无机化学
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生物化学
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药物化学
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DOI
高影响因子
Electrocatalysis
·
2019
·Vol. 10
·期 5
·540-548
·
IF 2.311
Wei Shengliang,Qian Lihong,Jia Dongling,Miao Yuqing
The 3D flower-like Ni 0.6 Zn 0.4 O microspheres were prepared by calcination treatment of Ni–Zn LDHs (layered double hydroxides) that were obtained through a hydrothermal method. The yielded Ni 0.6 Zn 0.4 O microspheres were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectrometry (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET). The results showed that the calcinated microspheres of Ni 0.6 Zn 0.4 O still well maintained the flower-like architecture of Ni–Zn LDHs. The surface area, total pore volume, and average pore diameter of the Ni 0.6 Zn 0.4 O microspheres were obtained with the values of 36.106 m 2 g −1 , 0.111 cm 3 g −1 , and 5.676 nm, respectively. As modified anode active materials, the Ni 0.6 Zn 0.4 O microspheres exhibited excellent electrocatalytic performance and fast electrochemical kinetics for methanol oxidation in strong alkaline electrolyte where the high surface area of flower-like Ni 0.6 Zn 0.4 O microspheres provides the high contact probability between catalysts and reactants. The presence of Zn also improves the electron transfer within catalysts inside. Also, the Ni 0.6 Zn 0.4 O modified electrode maintained good electrocatalytic performance during the term of 36,000 s.
Diagram of the formation of the flower-like Ni 0.6 Zn 0.4 O microspheres and CVs of Ni 0.6 Zn 0.4 O/GCE (a, d), NiO/GCE (b, e), and ZnO/GCE (c, f) in KOH solution without (a–c) and with (d–f) 0.1 M methanol.
研究领域:
材料科学
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电化学
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催化化学
✓ 已验证
DOI
高影响因子
IET Renewable Power Generation
·
2019
·Vol. 13
·期 10
·1641-1646
·
IF 3.605
Xiangping Li,Jianguang Zhang,Ningge Xu,Guanyi Chen,Beibei Yan
With the depletion of non-regenerated energy and the increasing awareness of environmental protection, renewable energy developing has become a key subject of research. Hydrogen as a kind of clean energy has aroused much attention. In this study, hydrogen production from bio-oil derived phenolic compound in aqueous phase was studied. Hydrotalcite-derived Ni/Zn/Al catalysts with different metallic compositions were synthesised and screened for aqueous-phase reforming (APR) of phenol. The physiochemical characterisations of hydrotalcite-derived Ni/Zn/Al samples were detected by X-ray powder diffraction (XRD), scanning electron microscope (SEM), fourier transform infrared spectroscopy (FTIR) and N 2 -sorption. In the calcined hydrotalcite-derived Ni 5.3 /Zn 2.7 /Al samples, most of the metal oxides exist in the form of rock solid and wurtzite type phase. In order to optimise the reaction condition of APR of phenol, the impacts of initial phenol concentration, reaction pressure and reaction temperature during the APR of phenol were investigated. It was found that increasing the concentration of phenol could enhance the side reaction and decrease the selectivity of hydrogen, while enhancing the reaction pressure was not favourable for hydrogen production. Moreover, proper reaction temperature was necessary for APR of phenol to produce hydrogen over hydrotalcite-derived Ni/Zn/Al catalysts.
研究领域:
能源化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 7
·1-9
·
IF 2.8
Li Wei,Dai Bo,Li Zhao,Yang Hongwei,Liu Guixiang,Xu Fang
A series of Ni x Zn 1− x Fe 2 O 4 ( NiZn, x = 0.15, 0.25, 0.35, 0.45, 0.65, 0.7, 0.8, 0.85) ferrites were prepared via a solid-phase sintering method. The microstructure, phase, and gyromagnetic properties of the NiZn samples were studied in depth. It was found that the lattice constants, density, and hardness of the samples gradually decreased with increasing Ni 2+ content. X-ray diffraction confirmed that all of the samples were in the spinel phase. Scanning electron microscopy indicated that the grain sizes were more uniformly distributed when x = 0.65. Raman analysis showed that the variation of Ni 2+ content affected the occupancy distribution of ferrite ions. The results indicated that Zn 2+ mainly occupied the A-site and that Ni 2+ mainly occupied the B-site. The coercivity ( H c ) of NiZn increased with increasing Ni 2+ content. Meanwhile, the saturation magnetization ( M s ) initially increased and then decreased. When x = 0.65, the total molecular magnetic moment started decreasing because of the decrease in the net A-site magnetic moment. The sample that had a composition of Ni 0.65 Zn 0.35 Fe 2 O 4 had the highest M s intensity with a value of 78.68 emu/g and a maximum value of 4 πM s = 4780 Gs.
研究领域:
材料科学
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陶瓷
·
固体物理
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磁学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Guangqiu Zhang,Yihang Zhao,Jianwei Zhao,Lirong Qin,Yi Li,Yujing Wang,Yong Tang
Nickel-zinc (Ni-Zn) batteries have attracted significant research interest due to their high safety, low cost, and high theoretical specific capacity. This investigation introduces a simple synthesis route for fabricating a nickel-cobalt-chromium layered double hydroxide/nickel-cobalt oxide (NiCoCr-LDH/NiCo 2 O 4 ) hierarchical composite on nickel foam (NF), aimed at advancing Ni-Zn battery performance. The synergistic integration of uniformly distributed NiCo 2 O 4 nanoneedles with NiCoCr-LDH nanosheets facilitates expedited ion diffusion and proliferates active reaction sites. Under optimized conditions, the NiCoCr-LDH/NiCo 2 O 4 @NF electrode exhibits a superior specific capacity of 234 mAh g⁻ 1 at 1 A g⁻ 1 , coupled with enhanced cycling endurance. When configured into a full cell alongside zinc plate, it attains an energy density of 395.7 Wh kg⁻ 1 and a peak power density of 15.6 kW kg⁻ 1 . Remarkably, the device sustains 90.7% of its initial capacity after an extensive 5,000-cycle operation, underscoring its exceptional prolonged cyclability. This study contributes crucial understandings for guiding the evolution of high-performance supercapacitors and Ni-Zn batteries.
研究领域:
储能
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电化学
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材料科学
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纳米技术
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xinyu Meng,Huiyu Lu,Jiarui Qi,Bosen Zhang,Jie Huo,Shuangming Wang,Jing Cao,Qianqian Song,Xiao Dong
The valence electron configuration largely determines the performance of functional materials, in which different electron spin and orbital occupancy would induce diverse phenomena. Herein, the study of 3d electronic configuration dominant gas sensing selectivity is presented. Utilizing ultrafast Joule heating, transition metal spinels XCr 2 O 4 (X = Co, Ni, Zn) have been synthesized and consistently exhibit sensing selectivity toward xylene gas. The e g empty orbitals of Cr 3+ 3 d 3 (t 2g 3 e g 0 ) tend to overlap with the π orbitals of xylene molecules, achieving stable xylene adsorption and electron transfer and thus presenting remarkable xylene gas sensing selectivity. The valence electron configurations of 3 d 7 , 3 d 8 and 3 d 10 for Co 2+ , Ni 2+ and Zn 2+ result in a progressively lower response to xylene gas. This valence electron configuration perspective is experimentally supported by gas sensing selectivity of XFe 2 O 4 (X = Co, Ni, Zn) toward acetone molecules, in which the electronic orbital configuration of Cr 3+ 3 d 3 of B sites is replaced by Fe 3+ 3 d 5 . Theoretically, density functional theory (DFT) calculations based on adsorption energy and charge density difference confirm the strong adsorption of xylene at Cr 3+ sites and efficient electron transfer from xylene to Cr sites. Download: Download high-res image (422KB) Download: Download full-size image
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Luping Li,Shuang Cheng,Liyu Deng,Ting Liu,Wenju Dong,Yuxiu Liu,Longjun Huang,Huan Yao,Xu Ji
Alkaline nickel–zinc (Ni–Zn) batteries, as traditional rechargeable aqueous batteries, possess an obvious advantage in terms of energy density, but their development has been hindered by the anode-concerned problems, Zn dendrites, self-corrosion, passivation, deformation, and hydrogen evolution reaction (HER). Herein, to solve these problems, a dual protective strategy is proposed toward the anode using ZnO as an initial active material, including a C coating on ZnO (ZnO@C) and a thin poly(vinyl alcohol) (PVA) layer coating on the electrode (ZnO@C-PVA). In a three-electrode configuration, the reversible capacity can reach 600 mAh g–1 for the ZnO@C-PVA. Using excessive commercial Ni(OH)2 as the cathode, the alkaline Ni–Zn cells exhibit good electrochemical performance: Discharge capacity can be as high as 640–650 mAh g–1 at 4 A g–1 with a Coulomb efficiency (CE) as high as 97–99% after activity, suggesting low self-corrosion and HER. Capacity retention is 97% after 1200 cycles, indicating rather good durability. The discharge capacity is even slightly increased with the increase of charge/discharge current density (≤8 A g–1), implying good rate performance. Additionally, the discharge voltage can reach 1.8 V (midpoint value) at various current densities, reflecting the fast reaction kinetics of the anode. Most importantly, no Zn dendrites and passivation are observed after long-term cycling. The strategy proposed here can solve the anode-concerned problems effectively, exhibiting a high application prospect.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Shuangfeng Ren,Yihui Li,Ye Chen,Xiaoling Mou,Ziang Zhao,Hejun Zhu,Xiaoyan Liu,Yu Meng,Li Yan,Apoorva Ravi,Amol Amrute,Ronghe Lin,Yunjie Ding
The rational design of selective, earth-abundant Ni-based catalysts for the reverse water–gas shift (RWGS) reaction is often hampered by an incomplete understanding of their operando active states. This study reveals that the CO2 hydrogenation selectivity over Ni–Zn catalysts is governed by a support-dependent, reaction-induced dynamic restructuring, rather than by any static, preformed sites. Through a combination of in situ characterization and theoretical calculations, we demonstrate that the active Ni–Zn intermetallic core encapsulated by ZnO forms dynamically only under the RWGS atmosphere on ZrO2 and TiO2 supports, but not on Al2O3 or during mere H2 reduction. Crucially, we identify in situ-generated CO as the essential inducer of this reconstruction, likely via facilitating ZnO reduction. Furthermore, the product selectivity (CO vs CH4) is dictated by the kinetic competition between CO desorption and its deep hydrogenation, a principle quantitatively linked to the evolved electronic structure of the active surface. This work shifts the paradigm toward designing catalysts that evolve into optimal structures in operando and provides a fundamental kinetic framework for selective CO2 conversion.
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·10028-10034
·
IF 3.45
Dengwei Hu,Fan Zhao,Lei Miao,Zhen Zhang,Yan Wang,Hualei Cheng,Yinfeng Han,Meijuan Tian,Hongxi Gu,Rong Ma
The present work investigated the effect of the addition of V 2 O 5 and MnCO 3 on the microstructure and magnetic properties of Ni-Zn ferrite ceramic samples prepared by a conventional ceramic sintering method at different temperatures. With this aim, a series of samples were prepared by varying the loadings of V 2 O 5 -MnCO 3 (un-doped, 0.4–0.1 wt%, 0.1–0.4 wt%, 0.2–0.3 wt%, 0.3–0.2 wt%, and 0.5–0.1 wt%, denoted as sample 1, sample 2, sample 3, sample 4, sample 5, and sample 6, respectively). The initial permeability and power loss of the different Ni-Zn ferrites were investigated with respect to the sintering temperature . The V 2 O 5 and MnCO 3 dopants significantly improved the initial permeability and power loss characteristics of the Ni-Zn ferrite at frequencies ≥0.5 MHz. When sintered at 1100 °C, sample 2 showed a maximum initial permeability of 931.23 H/m at a frequency of 1 MHz combined with a minimum power loss of 339.2 kW/m 3 . Co-doping with V 2 O 5 and MnCO 3 also resulted in the sintered samples with larger average grain sizes and higher density, while the sintering temperature of Ni-Zn ferrites was significantly reduced.
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2019
·
IF 3.89
Wenning Yang,Jia Li,Min Liu,Dickon H.L. Ng,Yong Liu,Xiaofan Sun,Jie Yang
Novel hierarchically porous CoAl-LDH (layered double hydroxides)/MFe 2 O 4 (Ni, Zn, Co) hybrids with excellent peroxidase-like catalytic activity , high selectivity and reusability were first fabricated by using natural cotton as a bio-template. Among them, CoAl-LDH/NiFe 2 O 4 exhibited the best intrinsic peroxidase-like property due to its 3D hierarchically porous structure with more exposed active sites, which could effectively catalyze peroxidase substrate 3,3′,5,5′- tetramethylbenzidine (TMB) in the presence of H 2 O 2 to produce typical blue color reaction. A facile and visual system for glucose detection using glucose oxidase was successfully established, which exhibited a sensitive response to glucose in the range of 25–400 μM with detection limit of 13 μM based on the hydroxyl radical originated from the decomposition of H 2 O 2 by the catalysis of CoAl-LDH/MFe 2 O 4 (Ni, Co, Zn) hybrids. This work offered an effective strategy to achieve morphology-controllable hierarchically porous materials and provided a new insight into seeking novel enzyme mimetics with enhanced catalytic activities.
研究领域:
材料科学
·
分析化学
·
生物传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Shuangxi Lin,Qiang Wang,Maoshuai Li,Ziwen Hao,Yutong Pan,Xiaoyu Han,Xiao Chang,Shouying Huang,Zhenhua Li,Xinbin Ma
Controlling the selectivity of CO2 hydrogenation by catalysis is a fundamental challenge. This study examines the interrelation between active sites and reaction pathways in Ni-catalyzed CO2 hydrogenation. The alloying of Ni with Zn to charged (Niσ––Znσ+) active sites modifies the electronic structure and d-band center, weakens the interaction with CO/H2, and preferentially catalyzes the reverse water gas shift to CO with the thermodynamically favored methanation pathway switched off. The charged dual sites can stabilize the activated CO2 species in a η2(C, O) bridge configuration, directly dissociate the C═O bond to *CO, and promote CO desorption. The mechanistic investigation has elucidated the reaction pathways in the Ni-catalyzed CO2 hydrogenation and identified the crucial intermediates that impacted the product selectivity, which can provide a theoretical guide for the Ni-based catalyst design.
研究领域:
催化化学
·
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）