DALTON TRANSACTIONS
·
2016
·Vol. 46
·期 2
·554-563
·
IF 4.177
Erbin Shi,Huiming Lin,Qian Wang,Feng Zhang,Shaoxuan Shi,Tingting Zhang,Xin Li,Hao Niu,Fengyu Qu
A novel ZIF-Ni composite film has been successfully prepared by a facile method involving the in situ deposition of ZIF-8 on a nickel porous film which is fabricated by selectively etching copper from a dense Ni/Cu alloy film. The nanostructures of the resulting ZIF-Ni composite films are carefully examined by a combination of scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray (EDX), and nitrogen adsorption–desorption. Cyclic voltammetric and amperometric studies show the enhanced electrocatalytic properties of the ZIF-Ni composite film electrodes toward hydrazine oxidation relative to the synergistic effect of ZIF-8 and porous Ni films. The application potential of the composite films as amperometric detectors is explored for the determination of hydrazine. A high sensitivity of 805.5 μA mM−1 for hydrazine detection with a low detection limit of 0.021 μM (S/N = 3) and a wide linear range from 2.5 μM to 28 mM are revealed for this new type of composite film as the detecting electrode. Moreover, the composite films exhibit excellent selectivity and remarkable stability for the oxidation of hydrazine. This can offer new opportunities for the fast and selective detection of hydrazine and provide a promising platform for sensor designs for hydrazine detection.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOM
·
2019
·Vol. 71
·期 4
·1485-1491
·
IF 2.305
Long Yiyu,Zhan Jing,Huang Jianyang
Well-dispersed mesoporous nickel fibers with large specific surface areas were first reported as anode catalysts for the electro-oxidation of ethanol. The porous nickel fibers could be obtained by an easily controlled and template-free coordination precipitation-thermal deposition method using NiCl 2 6H 2 O and oxalic acid as the raw materials and ammonia as the complexing and morphology-controlling agent. The method was low cost and suitable for mass production. The resulting nickel material showed a significant advantage of the hierarchical porous structure with fibrous morphology and a large specific surface area of 7.9 m 2 g −1 . The nickel fibers/GCE exhibited significantly higher electrocatalytic peak current density of 63 mA cm −2 with a lower Tafel slope of 58.7 mv dec −1 . It also showed lower charge transfer resistance in the presence of ethanol ( c = 0.2 mol L −1 ) compared with those of the purchased spherical nickel powders. The superior electrocatalytic performance makes the as-prepared mesoporous fibers promising candidates for electrochemical catalyst materials in direct alkaline ethanol fuel cells (DAEFCs).
研究领域:
电化学
·
材料科学
·
能源化学
·
催化化学
·
燃料电池
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiachen Li,Jun Pu,Ziqiang Liu,Jian Wang,Wenlu Wu,Huigang Zhang,Haixia Ma
The energy and power densities of rechargeable batteries urgently need to be increased to meet the ever-increasing demands of consumer electronics and electric vehicles. Alloy anodes are among the most promising candidates for next-generation high-capacity battery materials. However, the high capacities of alloy anodes usually suffer from some serious difficulties related to the volume changes of active materials. Porous supports and nanostructured alloy materials have been explored to address these issues. However, these approaches seemingly increase the active material-based properties and actually decrease the electrode-based capacity because of the oversized pores and heavy mass of mechanical supports. In this study, we developed an ultralight porous nickel to scaffold with high-capacity SnSb alloy anodes. The porous-nickel-supported SnSb alloy demonstrates a high specific capacity and good cyclability for both Li-ion and Na-ion batteries. Its capacity retains 580 mA h g–1 at 2 A g–1 after 100 cycles in Li-ion batteries. For a Na-ion battery, the composite electrode can even deliver a capacity of 275 mA h g–1 at 1 A g–1 after 1000 cycles. This study demonstrates that combining the scaffolding function of ultralight porous nickel and the high capacity of the SnSb alloy can significantly enhance the electrochemical performances of Li/Na-ion batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Corrosion Communications
·
2023
·
IF 0
Zhifeng Huang,Qiwen Yong,Zhi-Hui Xie
In this work, a novel stearic acid modified nickel-based (NiSA) superhydrophobic composite coating with good anti-corrosion properties was prepared on magnesium alloy AZ31 surface through electroless nickel-phosphorus plating, electrodeposition of porous nickel, and decoration with stearic acid. Surface topography, chemical groups, and structural compositions of the NiSA coating were characterized through scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD), respectively. Adhesion of the NiSA coating was evaluated by a tape test method, and corresponding water contact angle (WCA) and water sliding angle (WSA) were tested by a contact angle meter. Results indicate that WCA value of the NiSA coating was 154.6° ± 3.7°, and WSA value was 5.9° ± 1.7°, indicating a high superhydrophobicity. Electrochemical impedance spectroscopy (EIS) and Tafel fitting reveal that the corrosion current density of the coating ( j corr = 1.41 × 10 −8 A cm −2 ) was three orders of magnitude lower than that of the bare magnesium alloy, and the corresponding low-frequency impedance modulus (| Z | f = 0.01 Hz = 554.65 kΩ cm 2 ) increased by three orders of magnitude, verifying high corrosion resistance. Moreover, all contact angles (CA) of common liquid stains in life were higher than 150°, indicating the good anti-fouling capability of the NiSA coating.
研究领域:
材料科学
·
表面工程
·
电化学
·
腐蚀与防护
✓ 已验证
DOI
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
X.T. Li,H. Lei,C. Yang,Q.B. Zhang
Developing highly active and durable methanol electrooxidation reaction electrocatalysts for direct methanol fuel cells is crucial to achieve their practical application in future energy storage and conversion . Herein, we demonstrate that a nickel supported Pt-decorated electrode with an ultralow mass loading (1.50 μg cm −2 ) featuring Ni-Pt hybrid nanoparticles growing on self-reconstructed porous nickel frameworks (Pt/p-Ni) is synthesized via a facile electrochemical activation process . The self-supported Pt/p-Ni exhibits 3.65-fold higher activity for catalyzing the methanol electrooxidation reaction than that of commercial Pt/C with the same Pt loading under alkaline media . The activation approach results in surface rearrangement of Ni substrate to form nanoporous skeletons and highly dispersed Ni-Pt hybrid nanoparticles with a mean size of 4.34 nm grown on the nano-ligaments of the Ni porous skeletons. The porous skeletons decorated with nano-dispersion of Pt significantly increase the surface active sites and, therefore, yield a superior catalytic activity . Experiments coupled with density-functional theory calculations suggest the existence of a strong electronic interaction at the superface of the Pt/p-Ni, which leads to efficiently weaken the adsorption of CO on the catalyst surface and alleviate the CO ads poisoning of the active sites, resulting in remarkably enhanced methanol electrooxidation activity and durability.
研究领域:
电化学
·
催化材料
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 3
·837-848
·
IF 2.372
Lu Jiqing,Liu Xing,Yu Guanqun,Lv Jinkun,Rong Zeming,Wang Mei,Wang Yue
Abstract Cyclohexanol is an important feedstock in the chemical industry and the selective hydrodeoxygenation of lignin-derived guaiacol to cyclohexanol have gained increasing research attention in recent years. In this work, a series of nanoporous metal catalysts were employed for the hydrodeoxygenation of guaiacol and nanoporous Ni (NP-Ni) exhibited high catalytic performance for the preparation of cyclohexanol. With water as solvent, 100% conversion of guaiacol and over 90% selectivity to cyclohexanol were achieved at 180 °C and 2 MPa for 4 h. In order to further promote the stability of NP-Ni, induction melting, vacuum arc melting and mechanical alloying were separately employed for the preparation of NiAl precursor alloy. Mechanical alloying seemed to be an effective method for the alloying process and the as-prepared NP-Ni could keep almost stable after 10 times recycling. Furthermore, the reaction mechanism was investigated with NP-Ni for guaiacol hydrodeoxygenation. Scanning electron microscope (SEM), Brunauer–Emmett–Teller (BET) surface area analysis, X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron micrographs (TEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) were employed for the characterization of NiAl alloy and the optimal preparation methods of NP-Ni were acquired according to the characterization results. Graphic Abstract
研究领域:
化学工程
·
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
·
2022
·Vol. 43
·期 12
·8737-8748
·
IF 3.531
Qingtao Lv,Xin Sun,Chunhong Zhang,Yanjian Liu,Qiang Wang,Lijia Liu,Chao Wang,Hao Wei,Xiaohui Liang
Excellent impedance matching plays a crucial role in the design of absorbers to tackle the growing problem of electromagnetism pollution. Here, a porous nickel–zinc ferrite/polyaniline/polyimide (Ni Zn Fe 3 O 4 /PANI/PI) composite was prepared by in-situ polymerization and thermally assisted non-solvent-induced phase separation (TNIPS). The impedance matching of porous Ni Zn Fe 3 O 4 /PANI/PI composite can be improved by controlling the composition ratio of Ni Zn Fe 3 O 4 /PANI absorbing filler. When the absorbing filler satisfied a molar ratio of 8:2 for Ni to Zn and a mass ratio of 2:8 for PANI to Ni Zn Fe 3 O 4 , the porous Ni Zn Fe 3 O 4 /PANI/PI composite with 20% absorbing filler content displayed the minimum reflection loss of −30.01 dB, effective absorption bandwidth of 4.05 GHz (6.91–10.96 GHz), and the impedance matching (Z) value almost equal to 1 at 9.36 GHz. In addition, the initial thermal decomposition temperature ( T 5 %) of porous Ni Zn Fe 3 O 4 /PANI/PI composite beyond 544°C in nitrogen, demonstrates superior thermal stability properties. The porous Ni Zn Fe 3 O 4 /PANI/PI composite in this research has great application potential in electromagnetic wave absorption at high-temperature environment.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Yingshuang Guo,Zhihong Wang,Shuo Wang,Honglei Chen,Jin Kong,Xutong Liu,Qingxin Yang,Yong Zhang,Zhe Lü
Monolithic nanoporous metals are regarded as advanced functional materials for diverse applications. Herein, a facile approach was used to fabricate monolithic nanoporous Ni (MNPN) via direct reduction of NiO under a H 2 atmosphere. This method avoided complex preparation processes, and the only byproduct was water vapor , so the process is facile and environmentally friendly. When the optimized MNPN was used as a self-supporting electrode for the hydrogen evolution reaction (HER), it demonstrated outstanding HER performance with a low overpotential of 41.3 mV at a current density of 10 mA cm −2 in 1 M KOH solution. Using MNPN and electro-oxidized derivatives (NiOOH/MNPN) as the cathode and anode , an alkaline electrolyzer reached a current density of 10 mA cm −2 at only 1.57 V and exhibited exceptional long-term durability for 200 h at 100 mA cm −2 , outperforming most reported electrolyzers assembled with Ni-based electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 19
·期 3
·716-721
·
IF 8.506
Tian Wang,Dezhang Ren,Zhibao Huo,Zhiyuan Song,Fangming Jin,Mingwei Chen,Luyang Chen
An efficient unsupported nanoporous nickel (NiNPore) material for the hydrogenation of carbonates to formic acid (FA) in water was investigated for the first time. NiNPore is an environmentally benign catalyst and it exhibited remarkable catalytic activity in the reduction of a wide range of carbonates to afford formic acid in excellent yields with high selectivity, and maximum values of 86.6% from NaHCO3 and even up to 92.1% from KHCO3 were obtained. The hydrogen pressure and pKa of the carbonates had a significant influence on the formation of FA. The catalyst was easily recovered and could be recycled at least five times without leaching and loss of activity. The present study demonstrated a potential application for the synthesis of FA from CO2 or carbonate compounds.
研究领域:
化学工程
·
环境科学
·
催化材料
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Yi Zhang,Hao Wang,Man Li,Xinhao Sun,Yan Zhang,Zhifeng Wang,Chunling Qin
This work successfully synthesizes a new type of multi-layered flexible hybrid electrode (Cu/Ni(OH) 2 /np-Ni) composing of bimetallic components, hierarchical porous structure and outstanding glucose electrocatalytic performance. The synthesis strategy includes a facile two-step approach, i.e. the Ni(OH) 2 nanolayer in-situ grows on a nanoporous Ni (np-Ni) network (Ni(OH) 2 /np-Ni) via deionized water immersion and then the metallic Cu dendrites are uniformly deposited on Ni(OH) 2 /np-Ni. Moreover, due to the hierarchical porous structure as well as synergetic effect of Ni(OH) 2 and Cu dual electroactive components, the Cu/Ni(OH) 2 /np-Ni hybrid electrode electrodeposited with 1 min delivers wider linear range of 18 mM and higher sensitivity of 1.629 mA mM −1 cm −2 . The electrode possesses excellent interference immunity, reproducibility as well as long-time stability. In addition, the mechanism of electrochemical sensors for detecting glucose under alkaline conditions is briefly introduced. Accordingly, the flexible Cu/Ni(OH) 2 /np-Ni electrode material shows promise for further development as a contender for wearable glucose sensors.
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Hou Guangya,Wu Yitao,Chen Qiang,Zhang Jianli,Tang Yiping
Constructing low-cost, high-catalytic-performance anode electrocatalysts is a significant challenge for methanol oxidation (MOR) and urea oxidation (UOR) reactions. Using paper templates with abundant pores to prepare thin porous metal materials helps to obtain high-performance electrode materials. The nano amorphous B-doped Ni/crystalline Ni (nanoam Ni-B/Ni) foil composite electrodes were derived from paper templates prepared by impregnation, high-temperature reduction, and electrodeposition methods. Porous Ni foils (Nip) derived thinnest rice (“Xuan”) paper, initially used for Chinese calligraphy and painting, exhibits the best performance due to its strong adsorption and wettability. Compared to direct current electrodeposition, pulse electrodeposition yields finer amorphous B-doped Ni nanoparticles with good catalytic performance. Under a current density of 100 mA·cm −2 , the nanoam Ni-B/Ni composite electrode prepared under a duty cycle of 0.5–1.0 s achieved current densities of 290.4 mA·cm −2 (MOR) and 340.4 mA·cm −2 (UOR) at 0.8 V, which are improved by 37.1% and 55.1%, respectively, compared to those of Nip. After 2000 cycles, with solution replacement, the current densities maintained 99.2% (MOR) and 81.6% (UOR) of the original values, showing excellent electrocatalytic stability. This research provided a new use for Chinese rice paper, and the prepared Nip-based electrode, with a thickness of about 60 μm and a low area quality, had a simple preparation process and good electrochemical properties, and can be used as a potential substitute for commercial Ni foam for portable or small electrochemical devices. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
He Chen,Jin-Tao Chen,Lin Shao,Lei Wang,Xian-Zhu Fu,Jing-Li Luo
Conformal deposition and effective use of catalysts based on 3D electrode architectures are of great importance in electrocatalytic applications. In this work, 3D porous Ni substrate is first fabricated through a hydrogen bubbles dynamic templated method, and well-dispersed Pt nanoparticles are loaded on the substrate subsequently via atomic layer deposition . The 3D porous Ni/Pt is utilized as an efficient hydrogen evolution reaction catalyst. The 3D and high surface area structure is realized through the hydrogen bubbles dynamic templated method. The synergistic effect between atomic-layer-deposited Pt and the 3D structure of porous Ni substrate finds a new approach of minimal yet effective utilization of Pt for much enhanced HER activity. The 3D porous Ni/Pt samples show comparable activity performance with commercial 20 wt% Pt/C. Furthermore, according to the Pt mass-based calculation, only ~0.1 wt% Pt was deposited on 3D porous Ni substrate electrocatalysts which exhibits a much higher activity than the commercial 20 wt% Pt/C catalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）