COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Yingang Gui,Shasha He,Yunfeng Wang,Jiacheng Yang
This study proposed a self-powered bio-sensing positioning system driven by MOF-derived porous Ni/C material-based hybrid nanogenerator. The porous structure of Ni/C nanoparticles provides a high specific surface area, increases the capacitance of the nano-composite, and traps more charges due to the formation of micro-capacitors, which boost the performance of TENGs. The as-fabricated enhanced TENG achieved a peak voltage of 820 V and a power density of 10.1 W/m 2 . An optimal bilayer structure was determined through experiments and simulations to obtain the maximum output performance. Flexible TENGs are placed on various parts of the body to achieve biomechanical energy harvesting and motion monitoring, and provide power sources for small electronics. By combining with electromagnetic generator (EMG), a wearable self-powered positioning system is constructed. This work provides a new idea to enhance the output of TENG, and broadens the application of TENG in self-powered wearable systems.
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DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
J. He,X.-H. Lu,Y. Shen,R. Jing,R.-F. Nie,D. Zhou,Q.-H. Xia
Cyclohexanol is an excellent starting material for fuel production, but direct selective hydrogenation of phenol to cyclohexanol under mild conditions is a challenge. Herein we report a catalyst made of Ni nanoparticles supported on high-surface silica, which is highly active for selective formation of cyclohexanol under 1.0 Mpa pressure of hydrogen in aqueous medium without additives. Conversion of 100 mol% and selectivity up to 100% are achieved within 4 h and 1.0 MPa H 2 . Some factors such as the type of the source of silica, the loading of Ni, the reaction temperature and time, the H 2 pressure play important roles in controlling the selective hydrogenation. The generality of the 10%Ni/SiO 2 -1 catalyst for this reaction is demonstrated by selective hydrogenation of other hydroxylated aromatic compounds as well.
研究领域:
催化化学
·
有机合成
·
材料化学
·
绿色化学
·
能源化学
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DOI
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Hui-Xian Yang,Dong-Lin Zhao,Wen-Jie Meng,Ya-Qian Wu,Yu Yang,Hao Pu,Rui-Ze Gao
Electrochemical energy storage (EES) devices that combine high-performance are essential to resolve the extreme shortage of non-renewable energy sources and environmental issues. Nickel oxide (NiO) is considered to be a promising EES cathode material because of its ultra-high theoretical specific capacitance, whereas the practical applications are greatly limited with poor rate and cycle performance. Herein, we report the yolk-shelled NiO/Ni composites (YS NiO/Ni) that exhibit good charge storage capability in the aqueous electrolyte with high specific capacitance (2207.3 F g −1 at 1 A g −1 ), exceptional rate capability, and ultra-high cycling stability (95.8% retention after 10,000 cycles). The superior property can be ascribed to the special yolk-shelled structure that exposes more redox reaction active sites, and the associate Ni nanoparticles with flower-like NiO which can improve electron transfer as current collectors.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
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功能材料
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电化学能量存储
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Liqianyun Xu,Liuyang Zhang,Bei Cheng,Jiaguo Yu,Ahmed A. Al-Ghamdi,S. Wageh
Poor conductivity and rate capability are the obstacles faced by nickel-cobalt composites as electrode materials for supercapacitor application. Herein, simple electrochemical treatment conducted by cyclic voltammetry is applied and the overall performance of the active material is considerably enhanced. We discover that this treatment triggers the formation of Ni-Co-Cu ternary composite and optimizes the crystal structure of the untreated counterpart. The areal capacitance of the treated sample rockets up to 6.13 F cm −2 at 2 mA cm −2 , almost 13 times higher than the untreated ones. Besides, the resistance is substantially reduced by cyclic voltammetry treatment. Moreover, the Coulombic efficiency and stability are concurrently elevated. The reasons behind this treatment are mulled over and reasonable hypothesis is suggested. This study provides a cheap and effortless way to reform the structures of as-obtained samples as well as vigorously raise the performance of current available materials.
研究领域:
材料科学
·
电化学
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纳米材料
·
能源存储
·
功能材料
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 43
·期 14
·6795-6803
·
IF 4.229
Lin Li,Bo Jiang,Dawei Tang,Qian Zhang,Zhouwei Zheng
In this work, La 1− x Ce x NiO 3 perovskite-type oxide derived catalysts were synthesized for hydrogen generation from acetic acid steam reforming process (AcSR), and the effect of Ce substitution was investigated. Various techniques were applied to characterize the properties of synthesized catalysts including X-ray diffraction (XRD), H 2 temperature-programmed reduction (TPR), H 2 chemisorption , transmission electron microscopy (TEM), N 2 adsorption-desorption, and thermogravimetric analysis (TGA). The characterization results demonstrated that the perovskite-type oxide derived catalysts possessed uniform Ni dispersion and small Ni particle size. The adding of Ce remarkably increased the metal support interaction , improved the coke resistance and enhanced the water gas shift reaction . The reactivity and stability tests were conducted in a fixed-bed reactor. The La 0.9 Ce 0.1 NiO 3 exhibited the best performance for AcSR with an average H 2 yield of 90%, an average acetic acid conversion of 95%, and an accumulated coke deposition of 11.8 wt% in a 30-h stability test.
研究领域:
催化化学
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能源材料
·
化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Rui Yang,Xuefeng Bai,Xiangfeng Guo,Kun Song,Lihua Jia,Xiaoshuang Chen,Jun Wang
The rational construction of hierarchical electrode materials has always been an attractive strategic development in energy storage. In this paper, the porous Ni/C (NC) substrate, which is derived from Ni metal–organic frameworks (Ni-MOFs), is served as the conductive skeleton on Ni foam (NF) for supporting two different morphologies NiCo 2 O 4 nanostructure arrays (NiCo 2 O 4 /NC). The hierarchical layered nanomaterial utilizes the porous NC substrate as “favorable skeleton” for electron transfer and is coupled to vertical well-organized NiCo 2 O 4 nanoarrays to improve specific capacitance of composites. Benefits from the advantages of hierarchical layered structure, the electrochemical properties of as-constructed NiCo 2 O 4 /NC with two different morphologies were better than those of pure NiCo 2 O 4 prepared under the same conditions. Moreover, the optimized NiCo 2 O 4 nanowires arrays on NC substrate (NiCo 2 O 4NWs /NC) electrode acquire prominent specific capacitance of 1945.9 F g −1 (270.3 mAh g −1 ) at 1 A g −1 and good rate performance. Additionally, the assembled asymmetric device by NiCo 2 O 4NWs /NC and carbon nanotube (CNT) displays a high energy density of 58.31 Wh kg −1 at a power density of 749.7 W kg −1 , as well as good cyclic stability. The remarkable properties manifest that the hierarchical NiCo 2 O 4NWs /NC electrode has a good prospect in electrochemical applications.
研究领域:
材料科学
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能量存储
·
电化学
·
纳米材料
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DOI
高影响因子
ACS Earth and Space Chemistry
·
2019
·
IF 2.243
Zong-Sheng Liang,Bao-Dong Song,Yong-Ling Liu,Yong Liu,Hai-Tao Ren,Song-Hai Wu,Shao-Yi Jia,Xu Han
Natural pyrite has a strong ability to immobilize Ni(II) impurities. However, the differences in the oxidation reactivity between Ni(II)-adsorbed pyrites [Py*-Ni(II)] and Ni(II)-structurally incorporated pyrites [Py-Ni(II)] are still not clearly understood. In this study, Ni(II)-free pyrite (Py-free), Py*-Ni(II), and Py-Ni(II) were prepared, and their oxidation reactivity were compared. Our results show that Ni(II) can be successfully incorporated into the crystalline structure of Py-Ni(II) by replacing structural Fe(II) with the formation of sulfur defects on the surface of Py-Ni(II). The oxidation reactivity of different pyrites depends on how Ni(II) is immobilized in pyrite and follows the order of Py-0.08 > Py-0.02 > Py-free > Py*-Ni(II) [Py-0.02 and Py-0.08 are named according to the Ni(II):Fe(II) molar ratios in the starting material for the synthesis of Py-Ni(II)], indicating that structurally incorporated Ni(II) enhances the oxidation rate of pyrite, whereas adsorbed Ni(II) does the opposite. Differences in the electrochemical properties also indicate that structurally incorporated Ni(II) enhances the electron-transfer rates at the Py-Ni(II) surface, thus increasing the oxidation rates of pyrite. Variations in H2O2 concentrations confirm that the high electron-transfer rates induced by structurally incorporated Ni(II) enhance the reaction rates between dissolved oxygen and the pyrite surface, producing H2O2 at pHs 2.5 and 7.0. The presence of Fe(III)-S(-II) defects also significantly contributes to the production of H2O2. Variations of cumulative ·OH indicate that structurally incorporated Ni(II) improves the production of ·OH at pHs 2.5 and 7.0. The significantly higher concentrations of ·OH than those of H2O2 at pH 2.5 indicate that ·OH plays an important role in pyrite oxidation under acidic condition. The comparable concentrations of H2O2 and ·OH at pH 7.0 suggest that H2O2, ·OH, and even Fe(IV) formed between pyrite and H2O2 contribute to pyrite oxidation under pH-neutral condition.
研究领域:
环境化学
·
地球化学
·
矿物表面科学
·
氧化过程
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DOI
高影响因子
RSC Advances
·
2026
·Vol. 16
·期 3
·2205
·
IF 4.6
Qilin Guo,Jianchun Ma,Wenbo Lu,Ying Wang,Ergui Luo,He Xiao,Li Zhang,Haishun Wu,Tianjun Hu,Jianfeng Jia
The development of high-performance anode materials remains a critical challenge in advancing microbial fuel cells (MFCs). In this work, we present a novel strategy employing ternary transition metal Co-Fe-Ni sulfides to overcome the inherent trade-off between catalytic activity and structural stability commonly observed in conventional polymetallic sulfides. Through a facile one-pot solvothermal approach, we synthesized low-crystallinity CoFeNiS x (Co-Fe-Ni) ternary sulfides with precisely tunable Co/Fe/Ni molar ratios. When integrated as an MFC anode, the optimized Co-Fe-Ni sulfide delivered a maximum power density of 3915 mW m −2 using Escherichia coli ( E. coli ) as the biocatalyst, representing an 8.4% enhancement over its binary CoFeS x (Co-Fe) analogue. This performance exceeds that of most previously reported carbon-based anodes. The synthesized transition metal sulfides combine ease of fabrication with outstanding electrocatalytic efficiency. Our findings highlight the underexplored potential of ternary transition metal sulfides in engineering next-generation bioelectrochemical interfaces. Doping Ni into Co-Fe anode forms novel intermetallic linkages, accelerating electrochemical kinetics and reducing charge transfer resistance for maximum MFCs power output.
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产品关联
DOI
PubMed
高影响因子
Journal of Materiomics
·
2026
·
IF 10.6
Yukai Chang,Yihao Xu,Huilan Zhao,Yingjie Huo,Zhikai Yan,Penghui Li,Shangsheng Li,Meihua Hu,Libo Wang,Qianku Hu,Aiguo Zhou,Renchao Che
Simplifying the technology for regulating dielectric properties and enriching electromagnetic loss mechanisms of layered electromagnetic wave (EMW) absorption materials still faces challenges. Herein, we propose a simple and eco-friendly sieving strategy to control the lateral size (3–50 μm) of multilayered SiP 2 flakes for regulating dielectric constants. Moreover, hierarchical-structured 2D SiP 2 @0D Ni nanoparticles/1D Ni chains low-dimensional aggregates are in-situ constructed on SiP 2 flakes via a two-step hydrothermal method to enhance interfacial polarization and electromagnetic synergistic effects. When the lateral size was controlled at 11 μm (SiP 2 -300), the intrinsic SiP 2 exhibits strong reflection loss (RL) value of –38.9 dB at 1.7 mm. Notably, the construction of 2D/0D/1D SiP 2 @Ni not only maintains a strong RL of –40.1 dB, but also shifts the corresponding absorption frequency from original Ku-band (11.8 GHz) to C-band (7.2 GHz). More importantly, the effective absorption bandwidth is broadened from 2.9 GHz to 4.1 GHz benefiting from the construction of electromagnetic synergy networks. Additionally, the radar cross section (RCS) value (29.14 dB⸱m 2 ) evaluated by the computer simulation technology (CST) results for SiP 2 @Ni-S2 confirm the excellent dissipation ability. This study provides a new strategy for the application of layered absorbers with low-frequency, broadband and adjustable EMW properties.
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DOI
高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 12
·e70879
·
IF 4.1
Minjie Hu,Chan Wu,Hui Yue,Sichun Yang,Xu Hou,Enxian Yuan,Jiancheng Zhou
Dry reforming of methane (DRM) offers a promising route to convert greenhouse gases into syngas, although fabricating Ni-based catalysts with long-term stability during reaction conditions remains challenging. Unlike the conventional H 2 pretreatment typically required for activating Ni-based catalysts prior to DRM, we herein reported a one-pot hydrothermal encapsulation strategy to directly synthesize Ni-Mo bimetallic catalysts confined within silicalite-1 (Ni x Mo@S-1) under CH 4 /CO 2 atmosphere for catalyst activation. In contrast to the conventional impregnation Ni 5 Mo/S-1 catalyst, this structural encapsulation approach effectively improved nickel dispersion and enhanced catalytic performance. XRD and TEM revealed that the encapsulated Ni 5 Mo@S-1 exhibited ultra-small nanoparticle size (∼2.3 nm) and Mo promoted high dispersion of Ni nanoparticles. Furthermore, XPS and XANES confirmed that Ni 5 Mo@S-1 facilitated the direct reduction of NiO to metallic Ni under CH 4 /CO 2 atmosphere, thereby inducing active Ni 0 sites and Ni-O-Si bond formation with reinforced metal-support interaction. Graphical The CH 4 /CO 2 atmosphere-induced strategy of encapsulation of Ni x Mo@S-1 enhances DRM performance. Pretreatment with different atmosphere revealed the distinct roles of CH 4 /CO 2 in fabricating the confinement structure of Ni 5 Mo@S-1 for DRM. The CH 4 /CO 2 pretreatment atmosphere directly drives the formation of both active Ni 0 and stabilizing Ni─O─Si bonds with the promotion of Mo, remarkably reinforcing metal-support interaction.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jie Xiong,Shuo Wu,Bing Sun,Yiding Zhang,Botao Zhu,Lai Feng
W 18 O 49 with separately dispersed Ni sites was prepared as the electrocatalyst for electro-oxidation reaction of 5-hydroxymethylfurfural (HMFOR). • Ni 0.33 &W 18 O 49 promotes efficient HMFOR to 2,5-furandicarboxylic acid (FDCA) with a high yield rate (YR FDCA ) of ⁓3.37 mmol cm -2 h -1 . • Experimental and computational results reveal an indirect pathway for HMFOR, where the in-situ formed NiO(OH) acts as the proton acceptor. • A nickel foam‖Ni 0.33 &W 18 O 49 pair enables continuous production of FDCA with a high YR FDCA of ca. 0.279 g cm -2 h -1 . The electro-oxidation reaction of 5-hydroxymethylfurfural (HMFOR) provides an ideal solution for addressing the sustainable production of 2,5-furandicarboxylic acid (FDCA), a critical precursor for biodegradable polymer synthesis. However, HMFOR over non-precious catalysts may suffer from low current density and hence insufficient FDCA yield rate (YR FDCA ). In this work, a series of W 18 O 49 nanostructures with interstitially doped Ni 2+ sites (Ni x &W 18 O 49 ) are employed as the model catalyst for HMFOR. Among them, the optimal candidate Ni 0.33 &W 18 O 49 exhibits a superior performance in terms of an impressive YR FDCA of 2.88 mmol cm −2 h −1 and good durability, outperforming that of α-Ni(OH) 2 with continuously dispersed Ni-(μ 2 -OH)-Ni species. Experimental and theoretical studies reveal that the Ni&W 18 O 49 with an isolated Ni 2+ site follows an indirect pathway, where the in-situ formed NiO(OH) serves as a proton acceptor during HMFOR. It also surpasses α -Ni(OH) 2 in terms of remarkably reduced reaction barrier. Finally, an electrode pair of NF‖Ni 0.33 &W 18 O 49 is constructed to enable continuous productions of H 2 and FDCA with a high YR FDCA of 1.79 mmol cm −2 h −1 in a flowing single cell. This work thus provides fundamental insights into the design of Ni-based catalysts for highly efficient electro-oxidation of HMF to FDCA.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuanhui Shen,Chongyan Ruan,Qian Jia,Ying Pan,Hongguang Jin
Chemical looping dry reforming of methane (CL-DRM) is a novel CO2 utilization technology, producing high-quality syngas. Herein, the perovskite oxygen carriers La(Fe0.8–xNixAl0.2)O3 (x = 0, 0.2, 0.4, 0.6, and 0.8) were investigated for the CL-DRM process. Remarkably, La(Fe0.4Ni0.4Al0.2)O3 exhibited 93% CH4 conversion, 100% CO2 conversion, and 100% CO selectivity at 800 °C. Combined activity and characterization results suggest that the doping of Al promotes the nucleation of Ni and the growth of Ni-Fe nanoparticles. Owing to the redox exsolution effect during the cycles, the oxygen carriers are modified with abundant Ni-Fe catalytic sites on the surface, which exhibit excellent catalytic activity, oxygen capacity, and structural stability. In addition, the carbon cycle, which consists of methane decomposition and carbon oxidation, is catalyzed by Ni-Fe nanoparticles for enhanced CH4 and CO2 conversion during the cyclic redox process. We anticipate that the engineering of nanocatalytic sites on oxygen carriers will be conducive to obtaining target products for CL-DRM process optimization.
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）