ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Yaoyao Ning,Dandan Ma,Yu Shen,Fumin Wang,Xubin Zhang
Electrochemical water splitting into hydrogen energy offers a promising pathway for renewable and clean energy conversion and storage, but high overpotentials are needed to drive the process owing to the sluggish kinetics of the anodic oxygen evolution reaction (OER) and the cathodic hydrogen evolution reaction (HER). Herein, three-dimensional (3D) mushroom-like NiCo/NiCo 2 S 4 @NiCo arrays grown directly on Ni foam (NF) have been constructed via hydrothermal and electrodeposition methods. Owing to the unique mushroom-like structure and the beneficial effect of the composite catalyst, the NiCo/NiCo 2 S 4 @NiCo/NF electrode exhibits excellent activity and stability for both OER and HER. When serving as an anode electrocatalyst , the composite catalyst only requires a overpotential of 294 mV to achieve a high current density of 100 mA/cm 2 for the OER in 1 M KOH. Moreover, in chronopotentiometric and chronoamperometric measurements, the NiCo/NiCo 2 S 4 @NiCo/NF electrode displays distinguished electrochemical and structural stability for at least 100,000 s. Similarly, the NiCo/NiCo 2 S 4 @NiCo/NF catalyst delivers a hydrogen production current density of 10 mA/cm 2 at an overpotential of 132 mV and shows no obvious attenuation of performance after stability testing for 100,000 s in an extreme alkaline environment. Accordingly, the remarkable and stable bifunctional abilities enable the application of the NiCo/NiCo 2 S 4 @NiCo/NF catalyst in two-electrode water-alkali electrolyzers with a low cell voltage of 1.55 V to deliver a current density of 10 mA/cm 2 and excellent stability for over 27 h.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Hanxun Qiu,Feilong Qiu,Xuebin Han,Jing Li,Junhe Yang
Here we report an environmentally friendly, one-pot strategy toward preparation of nickel nanoparticle-decorated reduced graphene-oxide (Ni-RGO) nanostructures, by employing Ni(AC) 2 as nickel source and ethylene glycol as both solvent and reducing agent via a facile microwave irradiation heating approach. The results show that Ni nanoparticles with an average diameter of around 40 nm are homogeneously anchored onto the surface of RGO sheets. As compared to the pure Ni nanoparticles and RGO sheets, Ni-RGO composites with over 64 wt% loading of Ni nanoparticles possess superior catalytic activities and selectivity toward the reduction of 4-nitrophenol. The corresponding kinetic reaction rate constant (defined as κ ) is even four-fold compared to pure Ni nanoparticles. Such promising composites show great potential for friendly treatment of industrial waste containing nitrophenol in a simple, sustainable and green way.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 35
·11895-11904
·
IF 6.4
Mengdi Cheng,Yangxi Yan,Zhimin Li,Pangpang Wang,Ri-ichi Murakami,Dongyan Zhang
Modern electronic devices are highly in demand for high-performance piezoelectric materials. Herein, Pb(Ni, Nb)O3–Pb(Lu, Nb)O3–PbTiO3 piezoelectric ceramics are investigated, among which the 0.52PNN–0.16PLN–0.32PT ceramic shows the best performance (d33 = 850 pC N−1, d33* = 1139 pm V−1). Excellent piezoelectricity can be explained by multiphase coexistence, as well as an enhanced local heterogeneous structure. Polar nanoregions that promote polarization rotation are an important cause of high piezoelectricity according to characterization using SEM and PFM. TEM also confirmed a heterogeneous domain configuration with two coexisting phases. In addition, a large signal piezoelectricity of 1000 pm V−1 is maintained in the temperature range of 20–90 °C. This work presents an excellent example of achieving both high piezoelectric properties and a good temperature range in relaxor ferroelectric ceramics.
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Shuai Li,Chen Li,Minmin Mao,Kaixin Song,Yaseen Iqbal,Amir Khesro,Sinan S. Faouri,Zhilun Lu,Bing Liu,Shikuan Sun,Dawei Wang
In this work, Zn-Ni co-modified LiMg 0.9 Zn 0.1- x Ni x PO 4 ( x = 0–0.1) microwave dielectric ceramics were fabricated using a solid state synthesis route. Rietveld refinement of the XRD data revealed that all ceramic samples have formed a single phase with olivine structure. SEM images showed that the samples have a dense microstructure, that agrees with the measured relative density of 97.73 %. Based on the complex chemical bond theory, Raman and infrared reflectance spectra, we postulate that ε r is mainly affected by the ionic polarizability, lattice and bond energy, while P-O bond plays a decisive role in Q×f and τ f value. Optimum properties of Q×f ~ 153,500 GHz, ε r ~ 7.13 and τ f ~ −59 ppm/°C were achieved for the composition LiMg 0.9 Zn 0.06 Ni 0.04 PO 4 sintered at 875 ℃ for 2 h. This set of properties makes these ceramics an excellent candidate for LTCC , wave-guide filters and antennas for 5 G/6 G communication applications.
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DOI
高影响因子
BMC Chemistry
·
2019
·Vol. 13
·期 1
·1-15
·
IF 0
Guo J.,Ma Yu L.,Yu Jia Y.,Gao Yu J.,Ma Ning X.,Wu Xiao Y.
Herein, 2-(2-methoxyphenoxy)-1-phenylethanol (β- O -4), 2-methoxyphenyl anisole (α- O -4) and 4-phenoxyphenol (4- O -5) were selected as typical lignin model compounds. Given the effectiveness of traditional acid–base catalysts for lignin depolymerisation, a novel Ni/CaO–H-ZSM-5(60) catalyst was prepared to investigate the difficulty level of C–O bond of three model compounds cleavage in ethanol. It was observed that Ni/CaO–H-ZSM-5(60) had prominent performance on the C–O bond cleavage at very mild conditions (140 °C, 1 MPa H 2 ). Among them, the C–O bond of α- O -4 and β- O -4 could be completely cleaved within 60 min. Although the C–O bond of 4- O -5 had high bond energy, 41.2% of conversion was occurred in 60 min. The introduction of CaO could regulate the acidity of H-ZSM-5 to enhance the ability to break C–O bonds. Moreover, the possible pathways of C–O ether bonds in three lignin model compounds cleavage were proposed in order to selectively obtain target products from the raw lignin degradation.
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DOI
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 33
·27546-27556
·
IF 9.5
Changhu Leng,Huijie Li,Qianfeng Zhou,Chenyang Ma,Yongchao Wang,Shengdong Zhang,Chuanya Li,Wanglei Wang,Zhi-Jun Li
Catalytic upcycling of polyolefin (PO) waste into liquid fuels represents a promising strategy for closing the carbon loop but remains challenged by the reliance on noble-metal catalysts and the generation of low-value gaseous byproducts. Here we report a non-noble metal bifunctional catalyst, Ni–W/ZrO2, featuring Ni metal sites for (de)hydrogenation and WOx acid sites for C–C bond cleavage and isomerization. The catalyst enables complete conversion of low-density polyethylene (LDPE, Mw = 96.4 kDa, Đ = 4.6) under mild conditions (250 °C, 3 MPa H2) within 10 h, affording a high liquid fuel yield of 75.6 wt%. The liquid products are dominated by branched alkanes (C5–C20) with a branching index of 85.6%, affording a high research octane number of 88.9, which is comparable to that of commercial gasoline (86.6). Compared to existing non-noble metal systems, Ni–W/ZrO2 exhibits superior catalytic activity and effectively suppresses methane formation. Mechanistic analyses reveal the generation of partially electropositive Ni species that promote C–H bond activation. The catalyst also demonstrates excellent durability over five consecutive cycles and broad compatibility with various polyolefin wastes, providing a cost-effective and scalable strategy for sustainable plastic waste valorization.
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2025
·Vol. 27
·期 10
·1-14
·
IF 2.6
Shi Yuanteng,Li Nan,Chen Jingjie,Liu Lei,Xu Xingjie,Chai Jin,Li Peng
In view of the urgent need for efficient and low-cost treatment of organic pollutants in printing and dyeing wastewater, magnetic porous adsorbents have attracted significant attention owing to their high efficiency and reusability. Herein, magnetic bimetallic zeolitic imidazolate framework (mZIFs) nanoparticles with Fe 3 O 4 cores were synthesized as the initial precursor. Subsequently, the novel hollow mZIFs core–shell nanocomposites (defined as mNCs) were prepared through a mild tannic acid etching method, designed for efficient removal of organic pollutants from wastewater. The mNCs displayed remarkable adsorption potential, reaching up to 879.49 mg/g for methylene blue (MB) and 262.50 mg/g for tetracycline hydrochloride (TC) at 303 K, with adsorption following the pseudo-second-order kinetic model and fitting well to the Langmuir isotherm. Thermodynamic analysis revealed that the adsorption of MB and TC by mNCs proceeds spontaneously through an endothermic process, and the mNCs retained over 80% of their MB removal efficiency even after five adsorption–desorption cycles. These results highlight the potential of mNCs as an efficient and reusable adsorbent for eliminating organic contaminants in wastewater treatment. Graphical
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yaoxia Yang,Fuxing Zhou,Ruirui Zhang,Bolin Xiong,Zhen Yao,Dongfei Sun,Qingtao Wang,Zhiwang Yang
Hydrogen is the most suitable green energy for the current era, and electrolyzing water to produce hydrogen is the most efficient preparation method. The development of efficient oxygen evolution reaction (OER) electrocatalysts is crucial for sustainable energy conversion. In our work, we construct a hierarchical CNFS@NiFe-LDH/NF heterostructure by integrating ZIF-67-derived cobalt sulfide with nickel‑iron layered double hydroxide (LDH) and bimetallic sulfides on nickel foam (NF). This composite synergistically combines the high surface area and active sites from the MOF-derived sulfide, the tunable layered structure and abundant -OH groups from the LDH-which facilitate OH − adsorption and O O formation-as well as electronic modulation effects from the bimetallic sulfides. The catalyst exhibits excellent OER performance with an overpotential of 236 mV at 10 mA cm −2 and a Tafel slope of 42.23 mV dec −1 under alkaline conditions, and maintains high conductivity and low charge transfer resistance throughout operation. Meanwhile, the catalyst showed excellent stability for at least 66 h during the OER process at 50 mA cm −2 , which demonstrates outstanding durability. Moreover, this catalyst have satisfactory hydrophilicity/aerophobicity. This work provides an effective strategy for designing high-performance and stable electrocatalysts via heterogeneous interface engineering.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xiaohui Guan,Mohan Huang,Liu Yang,Guangsheng Wang,Xin Guan
In this paper, two-component nanocages containing CoS x and nickel-cobalt layered double hydroxides (Ni-Co LDH) were facilely synthesized via a multistep transformation approach. The zeolitic imidazolate framework-67 (ZIF-67) nanocrystals were firstly synthesized, and then after partial sulfuration, the CoS x /Ni-Co LDH nanocages were achieved by adding nickel ions for etching and precipitation. The prepared CoS x /Ni-Co LDH nanocages consisted of the hollow rhombic dodecahedral morphology with many nanosheets arrays on the shell. When used as electrode materials for electrochemical capacitors, this CoS x /Ni-Co LDH nanocages deliver a specific capacitance of 1562 F g −1 at a current density of 1 A g −1 . In addition, an asymmetric supercapacitor assembled with CoS x /Ni-Co LDH as cathode and active carbon (AC) as anode shows a high energy density of 35.8 Wh kg −1 at a power density of 800 W kg −1 and has an excellent cycling performance with the retention rate of 94.56% after 10,000 cycles, suggesting their potential application in high-performance electrochemical capacitors. These exceptional electrochemical properties can be attributed to the unique structure and synergistic effects between the metal sulfide and the bimetallic hydroxide, which also indicate the potential application of CoS x /Ni-Co LDH nanocages in high-performance supercapacitors.
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高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Jie Zhang,Chuang Li,Weixiang Guan,Xiaozhen Chen,Xiao Chen,Chi-Wing Tsang,Changhai Liang
Co(Ni)/MoO 3 catalysts were prepared, characterized and evaluated for the hydrogenolysis of bio-derived dibenzofuran (DBF), aiming at the understanding of the promoting effect of Co/Ni on MoO 3 for high-yield production of aromatic products. All Co(Ni)/MoO 3 catalysts selectively cleaved C-O bond, thus effectively transformed DBF to biphenyl (BP) at relatively moderate conditions. The experimental results from varying Mo species by adjusting the reduction temperature of MoO 3 together with XPS and in-situ XRD characteristic were evident that Mo 5+ species was responsible as the major active specie for the reaction. Promotional effect between Co(Ni) and Mo in Co(Ni)/MoO 3 catalysts was observed, resulted from the presence of acidic Co(Ni)MoO 4 species and a large number of Mo 5+ species both of which were created local to the Co(Ni)-O-Mo interface, as can be characterized by in-situ XRD, XPS, H 2 -TPR, NH 3 -TPD, in-situ FT-IR, Raman and TEM. The trend of the initial reaction rate follows: MoO 3 (0.18 μmol∙g cat −1 ∙s −1 ) < Ni/MoO 3 (0.26 μmol∙g cat −1 ∙s −1 ) < Co/MoO 3 (0.29 μmol∙g cat −1 ∙s −1 ), corresponding to the decreasing activation barrier. And the best catalytic activity was observed for the 100% yield of BP over Co/MoO 3 . A possible mechanism, including Co(Ni) facilitated reduction of Mo 6+ to Mo 5+ and Co(Ni) enhanced formation of acidic sites, is proposed to be responsible for the high activity in Co(Ni)/MoO 3 catalysts.
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DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 8
·1502
·
IF 4.324
Yayong Li,Chunxiao Xu,Kaiyuan Liu,Pengwan Chen,Xin Gao
N-doped porous carbon encapsulated NiO/Ni composite nanomaterials (N-doped NiO/Ni@C) was successfully obtained by a one-step solution combustion method. This study demonstrates a one-step combustion method to synthesize n-doped porous carbon encapsulated NiO/Ni composite nanomaterials, using carbon dioxide as the carbon source, nickel nitrate as the nickel source, and hydrazine hydrate as the reaction solution. Spherical NiO nanoparticles with a particle size of 20 nm were uniformly distributed in the carbon matrix. The load of NiO/Ni can be controlled by the amount of nickel nitrate. The range of carbon content of recovered samples is 69–87 at%. The content of incorporated nitrogen for recovered samples is 1.94 at%. As the anode of lithium ion battery, the composite material exhibits high capacity, excellent multiplier performance and stable circulation performance. N-doped NiO/Ni@C-2 was applied to lithium ion batteries, and its reversible capacity maximum is 980 mAh g−1after 100 cycles at the current density of 0.1 A g−1. Its excellent electrochemical properties imply its high potential application for high-performance lithium-ion battery anode materials.Keywords:combustion synthesis;CO2reduction;porous carbon;nickel oxide;hydrazine hydrate;lithium ion battery;nanocomposite
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 31
·16787-16797
·
IF 12.732
Maoyi Yi,Jie Li,Xinming Fan,Maohui Bai,Zhi Zhang,Bo Hong,Zhian Zhang,Guorong Hu,Huai Jiang,Yanqing Lai
PEO-based composite electrolytes are very promising in all-solid-state batteries (ASSBs). To achieve ASSBs with high energy density, PEO based composite electrolytes should match high-voltage cathodes, but the stability of the cathode interface is a challenging issue. Herein, we investigate the electrochemical performance of single-crystal LiNi0.6Mn0.1Co0.3O2 (SC-NMC613) in ASSBs with PEO-based electrolytes, and compare the electrochemical performance of SC-NMC613 with conventional polycrystalline LiNi0.6Mn0.1Co0.3O2 (PC-NMC613) systematically. The Li+ diffusion coefficient of SC-NMC613 is 2–4 times higher than that of PC-NCM613 in ASSBs. SC-NCM613 shows high initial specific capacity (152 mA h g−1) at 0.5C, stable cycling performance (100 cycles, retention of 108.9 mA h g−1), and exceptional rate capability even without surface modification, while PC-NCM613 shows low initial specific capacity (137.5 mA h g−1) at 0.5C, poor cycling performance (100 cycles, retention of 90.1 mA h g−1), and poor rate capability in ASSBs. The severe cycling degradation of PC-NCM613 is mainly attributed to the structural deterioration inside particles and the formation of a rock-salt phase. The SC-NCM613 particles observably alleviate the generation of intergranular cracks and decelerate the formation of the rock-salt phase. SC-NCM cathodes in ASSBs with PEO-based electrolyte are beneficial to the stability of the cathode interface. Therefore, developing single-crystal Ni-rich cathodes represents a promising strategy to achieve ASSBs with both high energy density and power density.
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高影响因子
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