Surfaces and Interfaces
·
2021
·
IF 4.837
Nanyu Fan,Quan Kong,Ruifeng Lang,Hongtao Guan,Gang Chen,Chengjun Dong
One-dimensional (1D) Zn 2 GeO 4 rods were in-situ grown on Ni foam (NF) using a ethylenediamine (En)/water mixed solvent by a hydrothermal route in one single step. Such rhombohedral phase Zn 2 GeO 4 rods are 1–2 μm in diameter and a few micrometers in length. Ethylenediamine is found to play a critical role in coordinating with starting zinc and germanium ions and acting as template. The Zn 2 GeO 4 /NF was developed as a new none-enzymatic hydrogen peroxide (H 2 O 2 ) sensor. In electrochemical studies, the Zn 2 GeO 4 /NF electrode exhibits high sensitivity (3974 μM mM −1 cm −2 ), wide linear detection range (1–4000 μM), fast response (<9 s), low detection limit (1 μM), excellent selectivity and stability towards H 2 O 2 . Several factors such as intrinsic nature of Zn 2 GeO 4 , the unique microstructure and the seamless contact with NF are believed to attributed to the excellent electrochemical sensing performances.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yaoyao Li,Jianwen Huang,Gaofeng Rao,Chunyang Wu,Xinchuan Du,Yinghui Sun,Xianfu Wang,Chengtao Yang
Considering the expensive and rare property of noble-metal based materials, great efforts are made to synthesize high-activity, economical and electrochemically stable catalyst for oxygen evolution reaction (OER) in harsh alkaline. Heterogeneous materials coupled by transition metal and carbon exhibit high capability for OER in recent years. Here, three-dimensional (3D) porous carbon coupled with Ni and NiO hybrid nanoparticles (Ni-C x-y , x and y are annealing temperature and time, respectively) is synthesized via high temperature pyrolysis and air annealing treatment. Redox reaction between carbon atoms and nickel ions during synthesis could achieve a high-level graphitization, which greatly enhances the corrosion resistance of catalyst in alkaline solution. The overpotential at 10 mA cm −2 and Tafel slope of Ni-C 500-20 achieve 353 mV and 97 mV dec –1 , respectively. Increased defects and intrinsic activity induced by air annealing process and synergistic effect between carbon, Ni and NiO give rise to the enhanced OER performance of as-prepared catalyst, as confirmed by in-situ Raman spectra. The catalyst conforms to sustainable and economic development concept, being a potential material for OER.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 2
·D37
·
IF 3.12
Tiantian Fan,Peng Sun,Jie Zhao,Zhiming Cui,Guofeng Cui
Recently, transition metal phosphides have attracted great interest of researchers as potentially promising electrode materials for supercapacitors. In this paper, three-dimensional (3D) ordered porous nickel phosphorus (Ni-P) has been facilely synthesized by a three-steps process including electrodeposition of polystyrene colloidal templates, electrodeposition of Ni-P and removing polystyrene. Compared with porous Ni, porous Ni-P exhibits ultrahigh charge storage performance (2270.26 F g−1 at 1 A g−1) and super-long cycle stability (86.6% capacity retention after 4800 cycles at 100 mV s−1). Furthermore, a flexible asymmetric supercapacitor (ASC) device assembled with porous Ni-P and activated carbon (AC) has been evaluated its performance in practical application. The ASC device displays ultrahigh energy density 20.1 Wh kg−1 at a power density of 12.8 kW kg−1, and the mass specific capacitance maintains 147.8% of the initial value after 3000 cycles. Furthermore, the energy storage mechanism of porous Ni-P and the reasons for its performance improvement have been explored. The superior performance of 3D ordered porous Ni-P makes it become the most promising material for supercapacitor.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Bai Miao,Tang Xiaoyu,Zhang Min,Wang Helin,Wang Zhiqiao,Shao Ahu,Ma Yue
Coupling the Si-based anodes with nickel-rich LiNi x Mn y Co 1−x−y O 2 cathodes (x ≥ 0.8) in the energy-dense cell prototype suffers from the mechanical instability of the Li-Si alloys, cathode collapse upon the high-voltage cycling, as well as the severe leakage current at elevated temperatures. More seriously, the cathode-to-anode cross-talk effect of transitional metal aggravates the depletion of the active Li reservoir. To reconcile the cation utilization degree, stress dissipation, and extreme temperature tolerance of the Si-based anode||NMC prototype, we propose a gel polymer electrolyte to reinforce the mechanical integrity of Si anode and chelate with the transitional cations towards the stabilized interfacial property. As coupling the conformal gel polymer electrolyte encapsulation with the spatial arranged Si anode and NMC811 cathode, the 2.7 Ah pouch-format cell could achieve the high energy density of 325.9 Wh kg −1 (based on the whole pouch cell), 88.7% capacity retention for 2000 cycles, self-extinguish property as well as a wide temperature tolerance. Therefore, this proposed polymerization strategy provides a leap toward the secured Li batteries.
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高影响因子
CRYSTENGCOMM
·
2012
·Vol. 14
·期 23
·7942-7950
·
IF 3.842
Heng Zhang,Yi Lu,Chang-Dong Gu,Xiu-Li Wang,Jiang-Ping Tu
A new strategy for synthesizing Ni–P alloy nanoparticles with a core-shell structure is proposed, which involves a facile ionothermal process in a deep eutectic solvent (DES). The architecture of the core-shell structured Ni–P alloys is featured as amorphous spherical cores homogeneously wrapped by self-generated crystalline Ni3P shells of different thickness, which rely on the molar ratio of Ni2+/H2PO2− in the choline chloride (ChCl)/ethylene glycol (EG) based eutectic mixture. As an anode for lithium ion batteries, cyclic voltammetry curves, electrochemical impedance spectra, and cyclability of the novel structured Ni–P nanoparticles were evaluated. It was found that the sample with a thicker crystalline shell exhibited improved capability and reversibility over the sample with a thinner one, especially at a higher discharge–charge current density. It was suggested that the crystalline shell can enhance the conductivity of the amorphous cores, suppress the aggregation of active particles and increase the structural stability during cycling.
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高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 40
·6010-6017
·
IF 3.382
Shuai Fang,Hongan Ma,Zhanke Wang,Zhiqiang Yang,Zheng-hao Cai,Luyao Ding,Xinyuan Miao,Liangchao Chen,XiaoPeng Jia
FeS is the main sulfur-containing compound in natural diamond inclusions. The research on FeS-doped diamond crystals plays an extremely important role in exploring the growth environment of natural diamond and the chemical composition of the earth. In our work, the characteristics of FeS doped diamond crystals were studied by using a China-type large volume cubic high-pressure apparatus with an iron–nickel alloy as a catalyst at 6.0 GPa and 1300–1350 °C. The crystals were characterized by OM, SEM, XPS, FTIR and Raman. Scanning electron microscopy of the crystal shows that the {100} plane of the crystal is rougher than {111}, which is related to the number of dangling bonds on different crystal faces of the crystal. The residue on the surface of the crystal was detected by mapping, and the test result showed that it was a sulfur iron and a sulfur nickel compound. FeS will decompose in the synthesis system, and the decomposition products are Fe and S2.The XPS spectrum of the crystal shows that S was successfully incorporated into the diamond lattice by forming C–S–O and C–S–SO2–C bonds, and the peak intensity was strong. The infrared spectrum shows that the N content in the crystal gradually increases as the doping ratio increases. Raman spectroscopy analysis shows that the S-doped Ib-type diamond single crystal has a high-quality sp3 structure, and the full width at half maximum (FWHM) of the crystal gradually broadens as the doping ratio increases.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2017
·Vol. 85
·期 2
·349-355
·
IF 1.575
Shi Min,Li Yanhong,Wang Li,Li Jing,Wang Meiri,Cui Hongtao
Abstract In this work, a facile material synthesis step-free strategy for the cost-effective assembly of Ni(OH) 2 -based electrodes was reported. The Ni(OH) 2 /MWCNTs composite electrodes for application in supercapacitors were assembled through the in-situ reaction of NiCl 2 ·6H 2 O in nickel foam as current collector with alkaline electrolyte. The characterization results indicated that NiCl 2 ·6H 2 O as raw material in electrode underwent the phase transformation from NiCl 2 ·6H 2 O to β-Ni(OH) 2 in electrolyte solution. The produced β-Ni(OH) 2 presented the same phase and same sheet morphology with thin thickness before and after electrochemical measurement. Based on the results of electrochemical measurement, 20 wt% was determined as the optimum content of MWCNTs for the assembly of electrodes. The as-assembled electrode with optimized content of MWCNTs exhibited high specific capacitance of 2001.4 F g −1 at current density of 3.2 A g −1 . This electrochemical performance of electrode could be attributed to the 2D flexible sheet morphology of Ni(OH) 2 and the improvement of electric conductivity by MWCNTs. Graphical abstract
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高影响因子
IONICS
·
2022
·Vol. 28
·期 10
·4843-4851
·
IF 2.961
Li Feifei,Liu Liqun,Liu Tingting,Zhang Mingxiao
In recent years, metal–organic framework (MOF) has become a hot electrode material for electrochemistry. However, it has rarely been studied in uric acid detection. In this paper, cubic Ni-based MOF has been synthesized by Ni(NO 3 ) 2 ·6H 2 O and H3BTC in room temperature; then, Au nanoparticles (Au NPs) were decorated on Ni-MOF by in situ synthesis method. This electrochemical sensor can response to uric acid (UA) in solution and enhance response signal of UA detection. Next, some experiment conditions including pH, scan rate, and proportion between Au NPS and Ni-MOF have been optimized with cyclic voltammetry (CV) and differential pulse voltammetry (DPV). And then, the Au/Ni-MOF has been charactered with scanning electron microscope, X-ray diffraction, and X-ray photoelectron spectroscopy. Experiment finding, this electrochemical sensor has a wide linearity range from 15 to 500 μM with a low detection limit of 5.6 μM (S/N = 3). Besides, the sensor constructed also has excellent selectivity and stability. Finally, the Au/Ni-MOF sensor was successfully applied in uric acid detection in the body’s serum.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Mang Ma,Anuj Kumar,Danni Wang,Yiyan Wang,Yin Jia,Ying Zhang,Guoxin Zhang,Zifeng Yan,Xiaoming Sun
Atomically dispersed metal-nitrogen-carbon complexes on carbon supports have drawn tremendous attention in the electrocatalysis fields. Herein, we managed the synthesis of atomically dispersed binary Ni x Fe 100-x -NC (x = 0–100) materials with tunable Ni/Fe ratios and investigated their underneath synergy effects for the enhancement of oxygen reduction (ORR) and oxygen evolution reactions (OER). EXAFS revealed the abundant presence of Ni(N 3 )-Fe(N 3 )-C n moieties in Ni 66 Fe 34 -NC sample. XPS fine scans indicated deep synergy of dual-site Ni/Fe that favored more charge localized over Ni/Fe sites. Electrochemical measurments showed that the Ni 66 Fe 34 -NC delivered a very high ORR half-wave potential ( E 1/2 ) of 0.85 V and a low OER overpotential of 467 mV at ∼10 mA cm −2 ( E j=10). The Fe site with Ni neighboring, as suggested by DFT simulations and in-situ Raman, was the responsible site for both ORR and OER. Furthermore, the Ni 66 Fe 34 -NC-assembled Zn-air battery afforded large specific power density and extraordinary cycling stability.
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高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 35
·355401
·
IF 3.953
Qianqian Ding,Yuan Wang,Liang Ma
Transforming levulinic acid (LA) to γ-valerolactone (GVL) is a significant route for converting biomass into valuable chemicals. The development of an efficient and robust heterogeneous catalyst for this reaction has aroused great interest. In this work, nitrogen-doped graphene (NG) supported nickel (Ni) based heterogeneous catalyst with excellent activities was successfully synthesized. The Ni/NG catalyst shows outstanding performance for hydrogenation of LA to GVL at a relatively low temperature of 140 °C, which is superior to most of reported heterogeneous catalysts. Further investigations indicate Ni nanoparticles are the active sites and the NG also plays an indispensable role. The catalytic performance is highly depended on the crystallinity, particles sizes and electronic structure of Ni in Ni/NG catalyst, which can be optimized by nitrogen doping. This work affords a new route for designing robust and excellent heterogeneous catalysts by doping method to optimize the support.
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高影响因子
IONICS
·
2022
·Vol. 28
·期 12
·5571-5580
·
IF 2.961
Wu Meijuan,Wang Liwei,Xu Fugang,Ma Guangran
A Ni-MOF superstructure composed of 2D nanosheet (2D Ni-MOFss) was prepared and further combined with reduce graphene oxide (rGO) for electrochemical detection of acetaminophen (AP). The structure and properties of the 2D Ni-MOFss were characterized by SEM, XRD, XPS, and electrochemical method. The loosened 2D lamella structure endowed the 2D Ni-MOFss with improved electrocatalysis and low charge transfer resistance than bulky Ni-MOF. After integration with rGO, the composite 2D Ni-MOFss/rGO shows significantly enhanced catalysis for redox reaction of AP with high current response and low over-potential. An electrochemical sensor for AP based on the 2D Ni-MOFss/rGO shows a wide linear range of 0.036 to 50 μM, and a low detection limit of 0.012 μM. The sensor with high sensitivity, good selectivity, and stability also show satisfied recovery for detecting AP in real sample. The facile preparation and enhanced catalysis make these 2D MOF composite attractive materials for electrochemical sensors.
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Yang Wang,Yingying Wei,Qianrui Xu,Shimin Shao,Hong Man,Yingrui Nie,Zhifei Wang,Yong Jiang
Magnetic materials perform well in the purification of histidine-rich proteins (His-proteins). In this work, a facile fabrication of yolk–shell magnetic Fe3O4@NiSiO3/Ni microspheres for the efficient purification of His-proteins has been reported. Yolk–shell Fe3O4@NiSiO3 microspheres were prepared via hydrothermal reaction. Then Ni nanoparticles (NPs) were loaded on Fe3O4@NiSiO3 microspheres after the adsorption and in situ reduction of nickel acetylacetonate. The yolk–shell Fe3O4@NiSiO3/Ni microspheres had a hierarchical flower-like structure and large cavities. The size of the cavity depended on the reaction time. This indicated that the microspheres had a large specific surface area for loading of more Ni NPs, which was crucial to the high His-protein adsorption capacity of Fe3O4@NiSiO3/Ni microspheres. Fe3O4@NiSiO3/Ni microspheres had a high adsorption capacity for bovine hemoglobin (BHb, 2822 mg/g), which was better than the values of other His-protein adsorbents. Fe3O4@NiSiO3/Ni microspheres still had a high BHb separation efficiency after seven separation cycles, indicating its good reusability and stability. Therefore, the as-prepared bifunctional yolk–shell Fe3O4@NiSiO3/Ni microspheres exhibited great practical application value for His-protein purification.
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高影响因子
危险品化学品经营许可证（带存储）