ELECTROCHIMICA ACTA
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2015
·
IF 4.504
Weiwei Li,Ruizhuo Ouyang,Wangyao Zhang,Shuang Zhou,Yang Yang,Yajun Ji,Yang Yang,Kai Feng,Xiaocai Liang,Mingshu Xiao,Yuqing Miao
Single walled carbon nanotube (SWCNT) sandwiched Ni-Ag hybrid nanoparticle layers were developed as electrocatalyst for glucose (Glu) oxidation . By mixing the carboxylated SWCNTs and Ni/Ag ions, Ni/Ag ions were easily adsorbed on both sides of SWCNTs in good order due to the electrostatic interaction between them, forming the Ni/Ag ion doubly adsorbed SWCNTs. Once the electrode modified with Ni/Ag ion doubly adsorbed SWCNTs was immersed in Ni-Ag solution, the Ni/Ag ion doubly adsorbed SWCNTs were immediately surrounded by a large amount of Ni/Ag ions. As the electrodeposition started, the Ni/Ag ions pre-adsorbed on the walls of SWCNTs were first reduced to very small particles as seeds to induce the further growth of Ni-Ag nanoparticles (NPs) on SWCNTs (seed-induced effect), forming the SWCNTs sandwiched Ni-Ag hybrid nanoparticle layers. Compared with the electrodeposition of Ni-Ag on bare GCE , the proposed Ni-Ag/SWCNTs composite was greatly improved in many properties like the particle size of Ni-Ag NPs, the hydrophilicity , the electron transfer ability and the electrocatalytic activity . For Glu electro-oxidation, Ni-Ag/SWCNTs/GCE demonstrated extraordinary electrocatalytic performance where the good linear current responses were obtained in two Glu concentration ranges of 0-2.5 mM and 0-350 μM with correlation coefficients ( R 2 ) of 0.9935 and 0.9985. A high sensitivity of 2946 μA mM ⿿1 cm ⿿2 was achieved with the proposed Ni-Ag/SWCNTs based sensor. More importantly, three excellent linear relations were also achieved in the ranges of 0-11 μM, 10-90 μM and 170-350 μM with R 2 as high as 0.9999 and the detection limits of 0.094, 0.076 and 0.062 μM, respectively. The new method was successfully applied to Glu detection in blood samples with preferable accuracy and precision.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Lianbo Wang,Jun Ren,Yuantao Zhao,Vincent Ji,Huabing Liu,Min Liu,Zemin Wang,Chuanhai Jiang,Zhanyong Wang
In this study, Ni-Ti composite coatings were prepared using electrodeposition . Experimental results and COMSOL computer simulation revealed the effect of the Ti microparticles on the microstructure and properties of the Ni-Ti composite coating. The incorporated Ti microparticle lead to grain refinement, texture elimination which were correlated with the effect of current concentration and heterogeneous nucleation. Domains consisting of inner nano-grains and outer radial columnar grains were located around the Ti microparticles, where the Ti microparticles acted as seeds. This was closely correlated with the time-dependent plating conditions like current density and electric field lines during incorporation process of the Ti microparticles. Besides that, during the incorporation process of Ti microparticles, current density concentration on the “V”-shaped valley between closely neighboring Ti microparticles promote the presence of fine Ni grains, existing between but not belonging to the Ti microparticles. Selective deposition of Ni metal on Ti microparticle surface, local current density concentration and the aggregation of Ti microparticles were observable, contributing to the spatial heterogeneity of the microstructure. Compared with the pure Ni coating, the average hardness of the Ni-Ti composite coating increased from 2.91 ± 0.43 GPa to 3.98 ± 0.46 GPa, leading to the enhanced wear resistance. However, spatial heterogeneity of the hardness distribution was observed due to the heterogeneous microstructure of Ni-Ti composite coating, which confined the improvement of wear resistance.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xue Zhang,Ruijuan Qi,Shuai Yang,Hui Peng,Lin Sun,Pinghua Xiang,Pingxiong Yang,Fangyu Yue,Junhao Chu
Lead-free multiferroic composite ceramics, KNbO 3 -AFe 2 O 4 (KNO-AFO, A = Mg, Zn, Ni, Co), are synthesized. The microstructure and property characterizations reveal that the introduced AFO can intrinsically modulate the optical/ferroelectric/ferromagnetic properties due to the independent existence of the two phases in the composite ceramics, including the significantly narrowing of the optical bandgap from the intrinsic ~3.2 eV of KNO down to ~1.2 eV, of which the modulation behavior is in line with the prediction of the first-principles calculations, and more importantly, the maintaining of the excellent ferromagneticity (with a remnant magnetization value of 0.8 – 36.5 emu/g) and ferroelectricity (~1 – 4 µC/cm 2 ) but for slightly deteriorating of the leakage as compared to the anti-magnetic KNO. In addition, different spinel ferrites composited to KNO present different functions for the ferroelectric/ferromagnetic properties, i.e., the ortho-spinel phase mainly retaining the ferroelectricity of the composite ceramics while the anti-spinel phase responsible for the ferromagnetism , especially in the KNO-CFO ceramics that not only have the strongest narrowing effect of the optical bandgap but also demonstrate the most excellent magnetic properties . This makes the composite ceramics promising for a wide range of applications in ferric-based storage and photovoltaics , and should offer more options for the research of multifunctional materials and devices.
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高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Lei-Xin Mao,Lin Fu,Xin-Yu Zhang,Zhi-Feng Yan,Zhi-Hua Gao,Lei Liu,Wei Huang,Zhi-Jun Zuo
The direct methanol fuel cells still recognize Pt and Pd as efficient catalysts for the methanol oxidation reaction (MOR). Our previous study demonstrated the high activity and stability of the Mo 2 C/MWCNT catalyst for electrocatalytic MOR. To further enhance the performance of Mo 2 C/MWCNT, the second metals (Ni and Co) are introduced onto Mo 2 C/MWCNT. It is found that Ni-Mo 2 C/MWCNT exhibits the highest electrocatalytic MOR activity, with a current density of 192 mA cm −2 in 1 mol/L(M) KOH + 1 M CH 3 OH electrolyte at 0.6 V (vs. Hg/HgO). Additionally, the stability of Mo 2 C/MWCNT significantly improves after Ni doping (85.61 % vs. 76.19 %). Characterization results reveal a strong interaction between Ni species and Mo 2 C, with some Ni ions doping into Mo 2 C. Furthermore, the Ni-Mo 2 C nanoparticles are evenly dispersed on MWCNT , with nanoparticle sizes ranging from 5 to 10 nm. DFT results indicate a charge transfer from Mo 2 C to Ni, resulting in the shift of the d-band center of the surface away from the Fermi level. Moreover, the interface charge transfer resistances of Ni- Mo 2 C/MWCNT significantly decreased (7.2 vs. 20.0 Ω). As a result, the electrocatalytic MOR activity on Ni- Mo 2 C/MWCNT improved compared to Mo 2 C/MWCNT.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Gaoxing Sun,Shuxin Zhuang,Shengyu Jiang,Yan Ren,Xiaoxiao Pan,Yuqing Sun,Bin Zhu,Yanfen Wen,Xiaodan Li
LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) presents as a prevailing commercialized cathode material for lithium-ion batteries. Nevertheless, further restraint in the extensive application of NCM811 attributed to its intrinsic inferior ionic conductivity and sluggish diffusion kinetics necessitates ingenious strategies to alleviate the above deficiencies. Enlightened by experimental investigation coupled with theoretical calculation (density functional theory calculation), the Y 3+ -doped and LiYO 2 -coated (ionic conductor) interface is rationally created as an innovative surface engineering. The Y 3+ -doping contributes to reducing the diffusion barriers of Li + (NCM with 0.78 eV, and NCM-Y with 0.62 eV), systemic energy (NCM with −1031.29 eV, and NCM-Y with −1041.32 eV), and lift Ni 2+ irreversible migration energy barrier (NCM with 3.06 eV, and NCM-Y with 3.25 eV) so as to accelerate Li + diffusion rate and effectively restrain the cationic mixing (NCM with 0.0202, and NCM-Y with 0.0198). Simultaneously, the ionic coating (LiYO 2 ) can not only inhibit the occurrence of side reactions at the interface to improve the interfacial stability, but also as a fast ion-conductor to elevate the lithium-ion diffusion rate of the material. The pristine NCM represents a commonplace comprehensive electrochemical performance with unsatisfactory rate capacity (116.4 mAh·g −1 at 10 C), and poor long cycling stability (35.5 mAh·g −1 after 500 cycles at 5 C). Interestingly, the dual-modified NCM-Y exhibits distinguished electrochemical performance with fabulous rate capacity (144.5 mAh·g −1 even at 10 C), and preeminent long cycling stability (132.6 mAh·g −1 over 500 cycles at 5 C).
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高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
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2024
·
IF 3.4
Jianqiao Yang,Yining Ding,Fen Zhao,Shuzhong Wang,Yanhui Li,Donghai Xu
In this study, a Cr coating was fabricated on Ni-based alloys to prevent under-deposit corrosion. The effect of salt deposition on the structural integrity of the Cr coating in SCW environment with/without oxygen was investigated. Results show that the Cr coating kept its integrity after exposure in SCW environment, successfully avoided the metallic ions leaching from Ni-based alloys. The structure of the oxide layer after exposure is a thin Fe 2 O 3 or FeCr 2 O 4 layer and a Cr 2 O 3 layer. The oxidation rate of the Cr coating decreased to one third of the sample after exposure in the same environment without salt deposit layer, indicating that the inward mass-transfer of oxygen to the alloy surface was inhibited by the salt deposit layer. The volume expansion of the sample due to the growth of Cr oxide layer was restrained by the salt deposit layer, forming a growth stress in the coating.
研究领域:
材料科学
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腐蚀科学
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高温材料学
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表面工程
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能源材料
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
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IF 10.652
Heping Xie,Shuo Zhai,Tao Liu,Hailong Liao,Yuan Zhang,Wei Zhou,Zongping Shao,Meng Ni,Bin Chen
The hybrid direct coal fuel cell (HDCFC) is a promising technology for the generation of power using coal, which is abundant and cheap. However, restricted contact between the solid carbon in the coal and the anode of the cell not only limits the electrochemical oxidation sites, but also adversely affects the transport of electrons and ions. Herein, we demonstrate a new strategy of using Cu-modified Ni foams as the three-dimensional outer anode for a high-performance HDCFC with 3D structure, that is rich in electrochemical reaction sites and beneficial for electron and ion transport when filled with molten carbonates and anthracite coal. Moreover, the CuNi alloy layer formed on the surface of Ni foam is of excellent coking-resistance and capable of preventing ash-clogging, therefore effectively promoting the durability of an electrolyte-supported HDCFC. An excellent maximum power density of 378 mW cm −2 at 750 °C is achieved using the prepared 3D anode with anthracite coal as fuel. Besides, the cell exhibited stable operation for more than 13 h at 100 mA cm −2 , promising a new electrode design strategy for developing high-performance HDCFC anodes.
研究领域:
能源材料
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燃料电池技术
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电化学工程
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洁净煤技术
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 103
·84937-84946
·
IF 3.84
Weiya Huang,Xiang Yu,Dan Li
In this paper, flower-like microspheres of Ni/Al mixed oxide (Ni/Al-CLDH-H), which consist of a hollow core and mesoporous shell, were prepared with the aid of sulfonated polystyrene beads. Thanks to the unique structure, the adsorption performance of the sample toward Congo red (CR) was higher than that of the sample Ni/Al-CLDH-S consisting of a solid core and mesoporous shell, which was prepared in the absence of sulfonated polystyrene beads. The Langmuir, Freundlich, Temkin, Dubinin–Radushkevich, Redlich–Peterson and Sips isotherm models were utilized to describe the adsorption process of Ni/Al-CLDH-H; the Sips model was found to best fit the adsorption data. The adsorption kinetics of CR onto Ni/Al-CLDH-H followed the pseudo-second-order model best, compared with the use of the pseudo-first-order and Elovich models. The thermodynamic study showed that the adsorption process was endothermic and spontaneous in nature. Our newly developed material retained a superior adsorption capacity without a significant loss after a number of adsorption–desorption cycles; indicating its potential as a reusable adsorbent for efficient removal of CR in water.
研究领域:
环境科学
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材料化学
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水处理
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吸附技术
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.5
liang wu,Na Wang,Yifeng Xiao,Qiankun Zhang,Guangyao Yang,Zhi He,Xiyue Kang,Yao Jiang,Yuehui He
Direct seawater electrolysis represents a pivotal technology for green hydrogen production. However, achieving efficient and stable cathodic heterostructures capable of maintaining long-term stability under industrial current densities remains a significant challenge. This work reports an in situ constructed Ni-Cr-Fe-Mo heterostructure derived from four transition metal powders, which feature multilevel catalytic heterointerfaces and abundant multifunctional active sites. The heterostructure demonstrates sustained hydrogen evolution for 50 hours at 2 A cm -2 in alkaline and neutral seawater electrolytes, while exhibiting exceptional performance under amperelevel current densities. Density functional theory (DFT) calculations reveal that two distinct active sites at the multiscale Ni-Cr-Fe-Mo heterointerfaces synergistically accelerate the hydrogen evolution reaction (HER) through a relay catalysis mechanism: one site facilitates H 2 O cleavage and the other promotes H 2 synthesis. This cooperative process not only optimizes reaction kinetics but also enhances corrosion resistance, enabling persistent high-efficiency seawater electrolysis. The study provides fundamental insights into the mechanisms driving long-term operational stability and offers a novel paradigm for developing durable heterostructures for industrial-scale seawater hydrogen production.
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.5
Qianfeng Zhou,Huijie Li,Shengdong Zhang,Changhu Leng,Chuanya Li,Yongchao Wang,Chenyang Ma,Wanglei Wang,Xiaogang Fu,Lei Zhu,Tengshijie Gao,Cheng Wang,Li-Zhu Wu,Zhi-Jun Li
Ruthenium (Ru) catalysts are highly efficient in the hydrogenolysis of polyolefin waste, converting the waste into valuable alkanes. However, excessive C–C bond cleavage of strongly adsorbed olefin intermediates often leads to low-value byproducts, primarily methane (CH4). In this study, we developed a Ru–Ni bimetallic catalyst supported on silica (RuxNiy/SiO2) that directly modulates olefin intermediate adsorption to suppress CH4 formation during polyolefin hydrogenolysis. By alloying low-electronegativity Ni with high-electronegativity Ru, we shift the Ru d-band center through electron transfer from Ni, weakening the adsorption of olefin intermediates. This modification facilitates hydrogenation and desorption pathways while suppressing excessive C–C bond cleavage. The resulting catalyst achieved complete polyethylene (PE) conversion at 250 °C, with 96.9 wt% liquid product yield and only 2 wt% CH4 production. Gasoline- and diesel-range alkanes (C5–C22) accounted for 77.1 wt% of the products. Additionally, the catalyst demonstrated excellent performance with real-world single-use polyolefin products. This work provides a new approach for controlling intermediate adsorption in polyolefin recycling, offering a promising path to enhance the efficiency and selectivity of plastic recycling technologies.
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DOI
高影响因子
Chinese Medicine
·
2026
·Vol. 21
·期 1
·34
·
IF 5.7
Fan Haibo,Hou Yalei,Li Yue,Zheng Zhiwen,Wang Xuelun,Li Yunfeng,Li Yongmin
Background Metabolic-associated fatty liver disease (MAFLD) is a common metabolic disease with complex pathogenesis and lack of effective treatment. Si-Ni-San (SNS), a traditional Chinese medicine, has emerged as a promising candidate for MAFLD treatment. However, the protective mechanism remains unclear. Methods C57BL/6N mice were fed with high-fat diet (HFD) for 12 weeks to establish MAFLD mouse model. Concurrently, oleic acid-induced HepG2 cells were used in vitro as a cellular model for MAFLD. The effects of SNS and the positive drug obeticholic acid on hepatic lipid droplets deposition in MAFLD mice and cell models were evaluated. The expression levels of farnesoid X receptor (FXR) and glycerol 3-phosphate acyltransferase 4 (GPAT4) were detected by western blot. The siRNA and dual-luciferase reporter assay were used to detect the interaction between FXR and GPAT4. High-performance liquid chromatography (HPLC) was used to identify the active components in the SNS aqueous solution, and their binding affinities to targets were detected through molecular docking, molecular dynamics simulations, and surface plasmon resonance (SPR). Results The active ingredients of SNS were identified by HPLC. SNS ameliorated hepatic lipid droplets deposition in both mouse and cellular models of MAFLD. SNS up-regulated the expression of FXR and down-regulated the expression of GPAT4 in hepatic tissues, thereby modulating proteins involved in hepatic lipolysis and lipophagy. FXR reduced lipid droplets accumulation by inhibiting GPAT4. The dual-luciferase reporter assay confirmed that FXR transcriptionally regulated and inhibited GPAT4 expression. Furthermore, molecular docking and molecular dynamics simulations predicted potential interactions between the active components of SNS and the FXR and GPAT4 proteins, with the binding affinity for FXR being subsequently confirmed through SPR analysis. Conclusion This study provided a new mechanistic exploration for FXR in improving MAFLD and broadened the research direction on the mechanisms by which SNS reduced hepatic lipid droplets deposition. It also offers a molecular dynamics basis for subsequent studies on how active components in SNS exert their effects through binding to FXR.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Ting Xiang,Kang Chen,Siqi Ni,Xijun Wang,Changlun Chen
The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) offers an eco-friendly route to produce 2,5-furandicarboxylic acid (FDCA). Coupling this anodic reaction with the hydrogen evolution reaction provides a sustainable alternative to oxygen evolution reaction in water electrolysis, enhancing energy efficiency while generating green hydrogen. However, conventional nickel-based catalysts suffer from weak substrate adsorption and limited active-site utilization. Here, we introduce a ligand-engineered charge-transfer complex, Ni(TCNQ) 2 (H 2 O) 2 , in which π-conjugated TCNQ ligands enable strong π–π stacking with the furan ring of HMF to enrich substrate adsorption, while the electron-accepting nature of TCNQ mediates metal-ligand charge transfer to regulate the Ni 2+ /Ni 3+ redox couple. This dual function significantly accelerates reaction kinetics and stabilizes intermediates, enabling Ni(TCNQ) 2 (H 2 O) 2 to deliver 100 mA·cm −2 at 1.38 V and nearly 100 % FDCA yield. Mechanistic insights from X-ray photoelectron spectroscopy, operando Raman, and density functional theory (DFT) confirm that ligand-driven adsorption and electron interactions accelerate the catalytic process. DFT free-energy profiles further demonstrate that Ni(TCNQ) 2 (H 2 O) 2 smooths the reaction energy landscape, lowering the thermodynamic barriers compared with Ni(OH)₂. This work underscores the pivotal role of ligand engineering in tuning catalytic interfaces for efficient biomass electrooxidation and green hydrogen co-production in integrated renewable energy systems.
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高影响因子
危险品化学品经营许可证（带存储）