JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 28
·1-15
·
IF 2.8
Wang Jia-Wei,Meng Tian-Li,Ma Ying-Xia,Lei Lei,Li Jing,Ran Fen
Metal–organic frameworks (MOFs) have low conductivity, which is not conducive to further application. To address the issue, in this work, using carboxylation multiwall carbon nanotubes (MWCNTs-COOH) as carbon materials, benzene-1,4-dicarboxylic acid (PTA) as organic ligands, nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·6H 2 O) as transition metal ions precursors, MWCNTs decorated with nickel MOFs (Ni-MOFs/MWCNTs) nanohybrids were fabricated via in situ growth by a one-pot solvothermal method. The electrochemical properties of the Ni-MOFs/MWCNTs nanohybrids obtained by adjusting the dosage of MWCNTs-COOH and the experimental conditions as electrode materials for supercapacitors (SCs) were investigated. The results showed that the Ni-MOFs nanoflowers self-assembled by nanorods were in situ growth on the MWCNTs, which could avoid the agglomeration of Ni-MOFs and MWCNTs, enhance the specific surface area, and expose more active sites to improve the electrochemical properties. The specific capacity of the Ni-MOFs/MWCNTs nanohybrids as electrode materials obtained at the optimal experimental conditions was 749.6 C g −1 at 1.0 A g −1 .
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高影响因子
Journal of Macromolecular Science Part B-Physics
·
2016
·
IF 0.62
Shaoping Yang,Shiyu Fu,Juanjuan Liu,Yiming Zhou
Hydrogels based on cellulose-graft-poly (acrylic acid) copolymers (C-g-AA) were synthesized by graft copolymerization in a phosphoric acid solvent. Fourier transform infrared (FT-IR) spectra confirmed the structure of the C-g-AA. The adsorption behaviors of the hydrogels for Cu(II) and Ni(II) were investigated. The results showed that their adsorption capacity increased as the initial concentrations of metal ions and the pH value of the solution increased. Freundlich and Langmuir isotherm models were employed to analyze the data from batch adsorption experiments. The results indicated that there were very good correlation coefficients for their linearized equations. The maximum adsorption amounts of the hydrogels for the metal ions, based on the Langmuir model, were 182 and 200 mg/g for Cu(II) and Ni(II), respectively. When the initial concentration of metal ions was 1000 mg/g the actual adsorption amounts of the hydrogels for Cu(II) and Ni(II) were 181 and 183 mg/g, respectively.
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CATALYSIS LETTERS
·
2023
·Vol. 154
·期 5
·2182-2196
·
IF 2.8
Liu Jialu,Song Zhi,Liu Boxia,Zhang Xiayan,Huang Yeqiong,Han Dongxu
Because of its high toxicity and severe degradation, phenol has caused serious environmental pollution, and it is urgent to explore a stable and efficient degradation method of phenol. In this study, Ni/Fe bimetallic atomic cluster composite catalyst activated peroxymonosulfate (PMS) to degrade phenol efficiently. The experimental results show that the phenol degradation rate can reach 100% in a wide range of pH (3–11), and the system offers good stability in repeated experiments. The free radical quenching investigation and electrochemical characterization showed that the non-free radical pathway dominated the degradation system, and a large amount of singlet oxygen and rapid electron transfer promoted the efficient degradation of phenol in wastewater. This study opens up a new way for bimetallic atom cluster catalysts to activate PMS to degrade organic pollutants. Graphical
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高影响因子
Science China-Chemistry
·
2023
·Vol. 67
·期 3
·981-989
·
IF 9.6
Guan Qitao,Shen Zhen,Tian Yiqiang,Huang Genping,Zhang Chun
The Ni-catalyzed highly selective diborylative cyclization of 1,6-enynes with diboron reagent has been developed. When pinB-Bdan was used, multiple types of boron-containing functional groups could be installed into organic molecule with great chemoselectivity and regioselectivity though this reaction. Meanwhile, if B 2 pai 2 was employed, the asymmetric diborylative cyclization could be well induced by using strategy of dynamic kinetic resolution. Importantly, the above reactions could afford desired product with 100% atomic economy, and could be compatible with different series of substituents. The studies of further transformation well illustrated that different type products could serve diverse synthetic strategy. Notably, the reaction mechanism was intensively studied by density functional theory (DFT) calculations, which could reveal the mechanism of regio- and enantio-selective control.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xinlong Bao,Yuemin Li,Lianshan Sun,Jianxun Zhao,Peng Chen,Heng Liu,Xinwei Wang,Wanqiang Liu
How to design the components of the cathode carrier is very important for the adsorption and catalysis of polysulfide conversion. Herein, Ni-Mo 2 C codoped hollow carbon nanospheres were prepared by two-step solvent synthesis and subsequent heat treatment. Ni as a supplementary material, it can effectively solve the problems of few electrochemical active sites and poor catalytic effect of lithium polysulfide (LPS) of Mo 2 C carbon nanospheres, and the optimal ratio of Ni to Mo 2 C was explored. Through the comparison of electrochemical tests, the Ni-Mo 2 C carbon nanospheres of optimal proportion shows high discharge specific capacity (0.2 C, 1101.3 mAh· g − 1 ) and excellent rate performance (2 C, 692.9 mAh· g − 1 ), which shows the best catalytic and adsorption effect on LPS. In addition, the optimal proportion of Ni-Mo 2 C carbon nanospheres has the highest lithium ion diffusion coefficient, which can accelerate the transport of Li + and the kinetics of electrochemical reaction.
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高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Ning Li,Wenwen Zhao,Linping Li,Yangqin Gao,Lei Ge
Photocatalysts with hollow structures have drawn great interest owing to their high specific surface area, which can enhance the photocatalytic performance. Herein, we designed the hollow cubic Cu2–xS@Ni–Mo–S nanocomposites by vulcanizing from the Cu2O template and loading the Ni–Mo–S lamellas. The Cu2–xS@Ni–Mo–S composites greatly improved the photocatalytic hydrogen performance. Among them, Cu2–xS–NiMo-5 achieved the optimal photocatalytic rate of 1326.07 μmol/g h, which is approximately 3.85 times higher than that of hollow Cu2–xS (344 μmol/g h) and had good stability for 16 h. The enhanced photocatalytic property was attributed to the metallic behavior of bimetallic Ni–Mo–S lamellas and the LSPR (localized surface plasmon resonance) effect of Cu2–xS. The bimetallic Ni–Mo–S can effectively capture the photogenerated electrons and quickly transfer-diffuse to produce H2. Meanwhile, the hollow Cu2–xS not only provided many more active sites to take part in the reaction but also introduced the LSPR effect to increase the solar utilization. This work provides valuable insights into the synergistic effect of using non-precious metal co-catalysts and the LSPR materials to assist in the photocatalytic hydrogen evolution.
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高影响因子
ACS Catalysis
·
2017
·
IF 10.614
Ming Xu,Shan He,Hao Chen,Guoqing Cui,Lirong Zheng,Bin Wang,Min Wei
The modulation of strong metal–support interaction (SMSI) plays a key role and remains a challenge in achieving the desired catalytic performance in many important chemical reactions. Herein, we report a TiO2–x-modified Ni nanocatalyst with tunable Ni–TiO2–x interaction via a two-step procedure: preparation of Ni/Ti mixed metal oxide (NiTi–MMO) from NiTi-layered double hydroxide (NiTi–LDH) precursor, followed by a further reduction treatment at different temperatures. A combination study (XRD, TEM, H2-TPR, XPS, and in situ EXAFS) verifies that a high reduction temperature enhances the Ni–TiO2–x interaction, which results in an increased coverage degree of Ni nanoparticles by TiO2–x as well as electron density of interfacial Ni (Niδ−). Moreover, the creation of a Niδ−–Ov–Ti3+ interface site (Ov denotes oxygen vacancy) induced by strong Ni–TiO2–x interaction serves as dual-active site to efficiently catalyze the water–gas shift reaction (WGSR). The optimized catalyst (Ni@TiO2–x(450)) via tuning Ni–TiO2–x interaction gives a TOF value of 3.8 s–1, which is ∼7 times larger than the conventional 15%Ni/TiO2(450) catalyst. Such a high catalytic efficiency is attributed to the interfacial site (Niδ−–Ov–Ti3+) with medium strength of metal–support interaction, as revealed by in situ diffuse reflectance Fourier transform infrared spectroscopy (in situ DRIFTS), which promotes the synergic catalysis between Niδ− and oxygen vacancy toward WGSR.
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高影响因子
CATALYSIS LETTERS
·
2017
·Vol. 147
·期 10
·2515-2522
·
IF 2.799
Zhang Zhenwei,Jiang Xingmao,Hu Jianheng,Yue Chuanjun,Zhang Jintao
Mesoporous nitrogen-doped carbon was synthesized in a controlled manner by a modified deep eutectic solvent method using silica nanoparticles as templates. Various amounts of urea and glucose, which contain hydrogen acceptor and hydrogen bond donor groups were heated and stirred to form homogeneous liquid precursors like deep eutectic solvents, and nitrogen element was uniformly dispersed on an atom scale. Ni-Mo sulfides supported on mesoporous carbon with varying N dopping exhibit excellent hydrodesulfurization (HDS) catalytic performance such as high conversion and good recycling stability in the HDS of dibenzenethiophene. Further investigation showed that a suitable N content in the carbon support enhance the HDS properties and the HDS conversion could reach up to 96%. Graphical
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Qihao Li,Xin Wang,Chenzhao Liu,Xinwei Yang,Cheng Li,Lichao Jia,Jian Li
Reduced Ce 0.9 Ni 0.1 O 2-δ consists of Ni nanoparticles and Ni-doped CeO 2 (CNO), named (Ni@CNO) with Ni nanoparticles uniformly distributed on CNO substrate with high oxygen vacancy concentration and good water absorption capability. Thus Ni@CNO demonstrates moderate catalytic activity and high carbon deposition resistance during CH 4 steam-reforming. When it is infiltrated into Ni 0.9 Fe 0.1 (NF) metallic support for metal-supported solid oxide fuel cells (MS-SOFCs), forming a continuous coating, Ni@CNO offers CH 4 steam-reforming activity additional to that of the NF support with increased H 2 /CH 4 ratio (3.38 at 600 °C) in the reforming gas, enhanced carbon deposition resistance, and prolonged performance durability. With the Ni@CNO-infiltrated NF support (NFNC), Ni/Ce 0.9 Gd 0.1 O 2-δ (Ni-GDC) function anode, GDC electrolyte, and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ /Ce 0.9 Gd 0.1 O 2-δ (LSCF-GDC) cathode, the MS-SOFC cell directly fueled by wet CH 4 (3 vol% H 2 O) exhibits a peak power density of 0.343 W cm −2 and the cell voltage durably maintains above 0.6 V at 400 mA cm −2 during a test of 280 h at 600 °C without noticeable carbon deposition in the support and the functional anode. Such performance is comparable to and higher than those reported, suggesting that NFNC is a promising option for direct-CH 4 MS-SOFCs.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Ningyuan Jiang,Yi Feng,Zhuhan Liu,Miao Yu,Gang Qian,Jingcheng Zhang,Zijue Zhou
La 2 Sn 2 O 7 has high melting point and excellent thermal stability, which improves the wettability between matrix and reinforcement. In this study, La 2 Sn 2 O 7 powder was synthesized by chemical coprecipitation method, and Ag-Ni-La 2 Sn 2 O 7 composites were prepared by vacuum hot-pressing sintering. The effect of La 2 Sn 2 O 7 content on the arc erosion behavior of Ag-Ni-La 2 Sn 2 O 7 composites was studied. The Ag-Ni-La 2 Sn 2 O 7 (85:12:3) composite has the lowest arc energy and the highest breakdown strength . With the increase of La 2 Sn 2 O 7 content, the defects on the cathode surface decrease and the erosion areas become flat. After arc erosion, the samples generate Ag 2 O, NiO, La 2 O 3 and SnO 2 . In this study, the mechanism of La 2 Sn 2 O 7 to improve the anti-arc erosion capability of composites is mainly enhancing the viscosity of the molten pool by the ``pinning'' action, consuming energy by the decomposition of La 2 Sn 2 O 7 , and the promotion of arc movement.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·Vol. 12
·期 2
·112109
·
IF 7.4
Nguyen Tien Hoang
In this study, a novel Ti/TiO 2 Blue/SnO 2 -Sb@Ni-La (denoted as SnO 2 -Sb@Ni-La(H)) was successfully prepared by hydrothermal method . The fabricated SnO 2 -Sb@Ni-La(H) electrode exhibited the superior electrocatalytic properties: high oxygen evolution potential (2.34 V vs. SCE), low charge transfer resistance (73.4 Ω cm −2 ), and highest degradation efficiency of benzoic acid (BA) ( k BA = 0.112 min −1 ), compared with other electrodes. The degradation rate of BA on the SnO 2 -Sb@Ni-La(H) was 3.6-fold, 4.7-fold, and 7-fold higher than that of SnO 2 -Sb@Ni-La(T), Ti/TiO 2 Blue, and Ti/SnO 2 -Sb, respectively. The study showed that •OH was the main radical contributing to pollutants degradation and the first-order degradation rate of organic pollutants in electrochemical oxidation (EO) process depends on their reactivity towards •OH ( k •OH,OP ), except for the case of methyl orange (MeO). Among the proposed combination methods, the combination of adsorption and electrochemical oxidation (rGO + EO process) exhibited excellent performance: the first-order degradation rate of P-nitrosodimethylaniline ( k RNO ) in (rGO + EO) process increased by 1.42-fold, compared with the EO process alone. This can be explained by the synergy effect from adsorption of RNO on rGO and the degradation of RNO during the EO process. The hydrothermal deposition combined with thermal decomposition can significantly improve the physical and electrochemical oxidation properties of the Ti/TiO 2 Blue/SnO 2 -Sb@Ni-La electrode: k RNO increased by 3.5-fold, compared with that of 1-time deposition by hydrothermal deposition. In addition, the effect of some operating parameters was investigated, including pH, current density, cathode size and distance of electrodes. This study provided a new method to prepare high-performance Ti/TiO 2 Blue/SnO 2 -Sb@Ni-La electrode and proposed some methods to improve the removal efficiency of the pollutants.
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Jiangnan Chen,Zhouchao Wang,Lin Xu,Huifang Wang,Xianghua Gao,Baolong Niu,Wenfeng Li
In the realm of glucose detection, nickel-based and copper-based nanocomposites have garnered significant attention due to their exceptional catalytic performance and high sensitivity. This study realized linear detection across dual concentration ranges in alkaline media by in situ growing Ni/Cu-BTC spherical nanocatalysts on reduced graphene oxide (rGO). From 350 μM to 2.95 mM, with a low detection limit (LOD L ) of 21.7 μM (S/N = 3) and a sensitivity (S L ) of 40 nA mM −1 cm −2 ; from 2.95 mM to 9.45 mM, the high-concentration detection limit (LOD H ) is 1.1 mM (S/N = 3), with an improved sensitivity (S H ) of 165.7 nA mM −1 cm −2 . The response time (t) is under 2 s. Additionally, the sensor demonstrated robust interference resistance, excellent stability (%RSD = 3.57 %), repeatability (%RSD = 2.27 %), and reproducibility (%RSD = 2.34 %). In real-world sample testing, this sensor measured glucose concentrations in plasma from healthy individuals both on an empty stomach and half an hour after eating, with a relative standard deviation range of 0.94 %–2.33 %. These results suggest that the rGO-Ni/Cu-BTC composite is a promising enzyme-free electrochemical sensing material for glucose detection
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