Materials Today Energy
·
2020
·
IF 5.604
Ziqi Zhang,Linchuan Cong,Zhuochen Yu,Lina Qu,Weimin Huang
Hydrogen is one of the most desirable sources with large energy density . Electrocatalysis of hydrogen evolution reaction is a promising way to produce hydrogen since it can be powered by renewable energy such as solar and wind energy . However, the mainstream electrocatalyst is noble metal (Pt/Ru/Ir), which is expensive and rare. It is necessary to develop non-noble metal catalysts toward HER from the perspective of sustainable development and long-term environmental conservation. Therefore, this paper provides a cheap and feasible way to synthesize the Fe–Ni bimetallic N-doped carbon framework (Fe–Ni@NCF). The prepared Fe–Ni@NCF exhibits the desired overpotential of 219 mV at 10 mA cm −2 in alkaline and 259 mV at 10 mA cm −2 in acidic solution, respectively. Besides, it exhibits similar current density loss as commercial Pt/C after 10,000 segments of CVs, which suggests satisfactory durability.
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DOI
高影响因子
Journal of Manufacturing Processes
·
2020
·
IF 4.086
Xiaoping Cai,Keer Li,Changcheng Sang,Xuanru Ren,Leihua Xu,Peizhong Feng
The dissimilar metals joining of Ti/Cu was conducted using a rapid thermal explosion (TE) reaction. The Ni-Al powder mixture was used as TE reaction system, and the effect of temperature (600, 700, 800 and 900 °C) on interfacial diffusions, microstructure and mechanical properties of Ti/Cu joint were investigated. The maximum combustion temperature of Ni-Al interlayer during heating process was 720 °C and a significant exothermic phenomenon was observed for 5 s. The infiltration of melted Al into the Ti/Cu substrate and formed a continuous transition region at the interface of the joints were the dominant joining mechanisms. Microhardness of the interlayer after heated at 900 °C for 30 min possessed prominent improvement from 32.6 to 101.7 HV due to the completely phase transformation of Ni-Al interlayer, which composed of main phase NiAl and minor phase Ni 3 Al. The bond strength of the joint was checked to assess the joint quality. For the joint processed by 900 °C for 30 min, the maximum shear strength of Ti/NiAl and Cu/NiAl were 33.4 MPa and 39 MPa, respectively.
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DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Zhichao Miao,Jian Meng,Manfen Liang,Zhenbin Li,Yuzhen Zhao,Fangyuan Wang,Leilei Xu,Jinglin Mu,Shuping Zhuo,Jin Zhou
For the electro-reduction of CO 2 to syngas , the fabrication of electrodes with excellent and adjustable catalytic performance is a critical step. In this work, Ni particles encapsulated in N-doped carbon nanotubes on carbon paper (Ni@N-CNTs/CP) composites were designed and prepared via an in-situ chemical vapor deposition method. As confirmed by different characterization techniques, the Ni@N-CNTs are successfully synthesized, and the surface of the CP is evenly covered by the Ni@N-CNTs. The effects of Ni content and treating temperature on the textural properties of composites are carefully investigated. The Ni@N-CNTs/CP composites are directly employed as the electrode for electro-reduction of CO 2 , and the action mechanisms of the N species, Ni particles, and N-CNTs structure are explored as well. The electrode exhibits excellent catalytic activity and high stability, reaching a specific current of 10 mA cm −2 . The H 2 /CO ratio in the achieved syngas can be tuned in the range of 5/1 to 1/1.5.
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高影响因子
ChemElectroChem
·
2017
·Vol. 4
·期 9
·2314-2320
·
IF 4.136
Cong Zhou,Lina Lin,Yuzhu Ma,Liyan Huang,Jun Li,Zhengping Liu,Zhaoxia Dong
The amorphous mesoporous Ni(OH) 2 hollow spheres (Ni(OH) 2 -HSs) with waxberry-like morphology were fabricated by using a facile hydrothermal method with poly(styrene-acrylic acid) spheres as the template, followed by extraction of the template. In the hydrothermal process, Ni(NO 3 ) 2 ⋅6H 2 O was employed as the precursor of Ni(OH) 2 . SEM, TEM, XPS, XRD, and N 2 adsorption-desorption isotherm techniques were used to characterize the structure and morphology of Ni(OH) 2 -HSs. The obtained Ni(OH) 2 -HSs have a uniform morphology with an average diameter of 300 nm and shell thickness of about 25 nm. The mesoporous shells of the Ni(OH) 2 -HSs are composed of amorphous Ni(OH) 2 particles. When used as an electrode, the as-prepared Ni(OH) 2 -HSs exhibit pseudocapacitive behavior with a high specific capacitance of 2559 F g −1 at a scan rate of 1 mV s −1 and a good capacitance retention of 91.8% after 1000 cycles at a current density of 5 A g −1 . These results suggest promising applications of the waxberry-like amorphous Ni(OH) 2 hollow spheres in electrode materials for supercapacitors. Graphical Caps off : Amorphous mesoporous Ni-(OH) 2 hollow spheres (Ni-(OH) 2 -HSs) with a waxberry-like morphology are fabricated through a facile hydrothermal method by using poly-(styrene-acrylic acid) spheres as a template, followed by extraction of the template. When used as an electrode, the as-prepared Ni-(OH) 2 -HSs exhibit pseudocapacitive performances with a high specific capacitance and a good capacitance retention. These results suggest promising applications of the waxberry-like amorphous Ni-(OH) 2 hollow spheres in electrode materials for supercapacitors.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yi-Hui You,Chang-Dong Gu,Xiu-Li Wang,Jiang-Ping Tu
Electrodeposition process of Ni–polytetrafluoroethylene (PTFE) composite coatings is limited to use aqueous plating bath where nonionic/cationic wetting agents usually are necessary to prohibit the hydrophobic PTFE particles being coagulated. This study proposes a novel electrolyte for the depositing Ni–PTFE composite coatings which is formed in a deep eutectic solvent (DES). The DES with a non-aqueous nature allows the PTFE particles well be dispersed in the electrolyte without the additive of any wetting agents. The Ni–PTFE composite coatings are successfully electrodeposited from the proposed DES-based plating bath which is confirmed by the scanning electron microscope and X-ray energy dispersive spectroscope. Deposition mechanism, microstructure, and properties of the composite coatings are investigated. Importantly, it is found that the Ni–3.1wt.% PTFE composite coating shows a hydrophobic behavior with a contact angle of about 121±1° and an enhanced wear resistance than the pure Ni coating due to the incorporation of PTFE.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Li Li,Kaikai Chang,Ping Fang,Kui Du,Chaogui Chen,Shaodong Zhou,Chao Shen,Wensheng Linghu,Guodong Sheng,Tasawar Hayat,Xiaojie Guo
Intending to remove Ni(II) from wastewater, porous p-BN was employed to recovery Ni(II) by batch and X-ray photoelectron spectroscopy technique. The performances and mechanism of p-BN for Ni(II) sorption had been studied by diverse characterization technologies. The kinetic data was calculated to conform a pseudo-second-order model, and isotherm data fitted to a Freundlich equation. We obtained a high removal rate and a high adsorption capacity. A possible mechanism can be expressed from XPS results. The surface of p-BN is B OH/B NH 2 enriched and exhibits a weak alkalinity. When p-BN contact with Ni(II) solution, the hydroxide ions releases from the surface while there is a formation of B O⋯Ni; the small group of B O⋯Ni is acting with hydroxide ions, thereby forming B O⋯Ni(OH) 2 and continuously adsorbs Ni(II) to form B O⋯Ni(OH)ONi(OH) like as precipitated nucleus. Then, due to the interaction of hydroxyl-O with electron-deficient B, the veil-like Ni(OH) 2 generated from precipitated nucleus evenly attaches to p-BN. The bonding state of Ni(II) on p-BN by XPS spectra revealed that the process of adsorbing Ni(II) onto p-BN was chemisorption through the formation of Ni(OH) 2 and the interaction between hydroxyl-O and electron-deficient B. The analyses implied that p-BN is a promising candidate for recovery of Ni(II) from wastewater.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Lingjie Li,Wenjun Huang,Jinglei Lei,Bo Shang,Nianbing Li,Fusheng Pan
The electrocatalyst with low cost and excellent catalytic performance for oxygen evolution reaction (OER) is indispensable in large-scale water electrolysis for hydrogen generation . Herein, we report an inexpensive and highly efficient OER catalyst, amorphous Ni-Fe-P holey nanospheres , which were in situ grown on 3D porous Ni foam by one-step electrodeposition . The as-prepared Ni-Fe-P/NF shows attractive catalytic performance in alkaline medium with a low overpotential of 156 mV at a 10 mA cm −2 current density, a Tafel slope of 69 mV dec −1 , and the long-term (>36 h) durability, which is superior to other well-performed metal-phosphide catalysts reported and the commercial catalyst IrO 2 . Such remarkable OER catalytic performance can be attributed to the synergism of Ni and Fe elements, the amorphous holey structure, the surface superaerophobicity and self-supportive configuration of the as-prepared Ni Fe bimetal phosphide.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yiyang Bi,Xin Wang,Ke Li,Chengqian Wang,Yu Zhang,Qun Liu
A reasonable introduction of MOFs-derived Ni 2 P with high dispersion is a valid way to reduce the recombination rate of photogenerated electron holes , thus enabling more effective visible light-driven water splitting. Herein, the MOF-on-MOF strategy was used to prepare Ni 2 P@UiO-66-NH 2 by in situ growth of Ni-MOF on UiO-66-NH 2 followed by vapor-phase phosphating, and the composite photocatalyst of CdS/Ni 2 P@UiO-66-NH 2 was obtained by a facile ultrasound method in solvent. UiO-66-NH 2 provides the growth site for Ni-MOF, enabling uniform dispersion of Ni 2 P and the firmly anchoring of CdS. By adjusting the proportion of Ni 2 P@UiO-66-NH 2 , the light absorption capacity and photocatalytic activity can be further optimized. The hydrogen production efficiency of CdS/Ni 2 P@UiO-66-NH 2 can reach up to 2103 µmol·g −1 ·h −1 , which is about 7 times higher than that of pure CdS. The improvement of the photocatalytic performance of CdS/Ni 2 P@UiO-66-NH 2 composites can be mainly ascribed to the increased active sites exposure, well dispersion of CdS, and the creation of multiple heterojunctions , which tune the band gap, broaden the visible light absorption, and facilitate the carrier separation. This work offers an efficient synthetic strategy for creating ternary composites with remarkable catalytic activity and high stability for hydrogen evolution .
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高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 15
·8301-8312
·
IF 3.917
Li Xiangping,Liu Juping,Zhang Jianguang,Liu Bin,Ma Wenchao,Wang Chuanbin,Chen Guanyi
Lignocellulosic biomass-derived bio-oil is considered as a promising renewable biofuel. In this paper, incipient wetness impregnation method, ammonia grafting method and direct synthesis method were employed as nickel loading methods for the preparation of Ni/Al-SBA-15 catalysts. The effects of these nickel loading approaches on the structure and hydrodeoxygenation performance of Ni/Al-SBA-15 were studied. The structure of Ni/Al-SBA-15 was significantly influenced by the nickel loading methods, including the specific surface area, the pore volume, the wall thickness and so on. Nickel loading methods also affected the actual nickel content of nickel-based catalysts. Unsuccessful loading of nickel species was observed during the preparation of Ni/Al-SBA-15 using direct synthesis method. The conversion of eugenol and selectivity of products after hydrodeoxygenation in n -dodecane over Ni/Al-SBA-15 catalysts were investigated. Results showed that the conversion of eugenol nearly reached 100% for all the reaction, but the composition of product was significantly different when using different Ni/Al-SBA-15 as hydrodeoxygenation catalyst. The reaction pathway of eugenol hydrodeoxygenation in n -dodecane was also speculated in this paper. Graphic Effects of nickel loading approaches on the structure and hydrodeoxygenation performance of Ni/Al-SBA-15 were investigated. For the liquid phase hydrodeoxygenation of eugenol to hydrocarbon, catalysts prepared by ammonia grafting method exhibited the highest catalytic activity.
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Pai Peng,Jie Ren,Shuxiang Wang,Jing Huang,Li Zou,Pingping Yang,Xiangui Pang,Ming Zhang,Youyi Su,Wanqi Luo,Wenyan Tao,Jiale Xie
The severe photocorrosion of cadmium sulfide (CdS) restricts its practical application for solar hydrogen production. Although remarkable progress has been achieved with an overlayer strategy for isolating the CdS surface, the lifetime of CdS-based photoanodes is still far from the actual requirements. Herein, a hybrid overlayer of defective Ni-MOF and NiO nanoparticles has been developed through the chemical bath deposition method with postannealing. This hybrid overlayer of Ni-MOF-d is coated on the surface of the TiO2/CdS type-II heterojunction. The composite photoanode exhibits a photocurrent density of 4.41 mA cm–2 at 1.23 VRHE, which is 3.47- and 1.32-fold that of CdS and TiO2/CdS, respectively. The Ni-MOF-d overlayer gives rise to a negative shift of the onset potential by 59.51 mV. After a long-term stability test of 11 h, a photocurrent retention of 70% is observed, which is among the most robust CdS-based photoanodes. The kinetics studies reveal that the performance improvements can be attributed to the multiple functions of the Ni-MOF-d hybrid overlayer, including isolating the CdS surface from the electrolyte, cocatalyzing the electrode oxidation processes, passivating the surface defect states of CdS, and facilitating the charge injection from the photoanode to the electrolyte.
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高影响因子
ACS Sensors
·
2025
·
IF 9.1
Kang Yang,Bin Zhou,Hong Zhou,Tianrun Zheng,Yueying Liu,Xishuang Liang,Fengmin Liu,Geyu Lu
Rapid and robust ppb-level H2S sensing is of great importance for environmental monitoring, industrial safety, food quality control, and disease screening. However, improving the H2S sensing properties of semiconductor oxides under low-power conditions remains a significant challenge. In this work, an acid etching method was utilized to precisely control the elemental distribution in bimetallic nanoalloys. By tailoring the Ni distribution in PdNi alloy nanoparticles anchored on ZnO nanosheets, an ultralow detection limit of 5 ppb for H2S was achieved at a working temperature of 140 °C. More importantly, the sensor also demonstrated fast response and recovery kinetics, with its superior antipoisoning performance attributed to the oxidation of H2S into SO2 instead of sulfates or sulfites, as evidenced by in situ FTIR spectroscopy. Additionally, density functional theory calculations were performed to elucidate the synergistic effect of the PdNi alloy, revealing that Pd atoms act as electron donors while Ni atoms facilitate H2S adsorption. This study provides a viable strategy for optimizing noble metal-modified oxide-based gas sensors.
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DOI
PubMed
高影响因子
WEAR
·
2026
·
IF 7.2
Qingke Yu,Weisheng Zheng,Jiangtao Yu,Yan Lou,Pan Guo,Guijian Huang,Mingyu Liu
Micro moulds are widely used in the fabrication of micro/nano structures, where wear resistance is critical. This study presents a mixed phosphonic acid self-assembled monolayers (SAMs)-modified Zr-Cu-Al-Ni bulk metallic glass (BMG), which not only retains hydrophobic properties but also demonstrates exceptional high-temperature tribological performance. The wear behavior and mechanisms were systematically studied in the range from room temperature (RT) to 250 °C. Tribological tests were conducted using a multifunctional friction and wear tester in a ball-on-disk configuration, with polyetheretherketone (PEEK) balls as the counterface material against both bare and SAMs-modified Zr-based BMG specimens. The evolution of wear mechanisms in the PEEK-SAMs-modified BMG tribosystem at different temperatures was analyzed, particularly focusing on the coupled effects of the PEEK glass transition temperature and the melting and decomposition temperatures of SAMs on the tribosystem. Results demonstrate that the wear rate of Zr-Cu-Al-Ni BMG exhibits a progressive decrease within the RT to 140 °C range, declining from 53.26 × 10 −6 mm 3 N −1 m −1 to 0.156 × 10 −6 mm 3 N −1 m −1 .At RT, abrasive and minor oxidative wear dominate. Between 90 °C and 140 °C, molten SAMs films provide stable lubrication, with the friction coefficient dropping to 0.004 at 110 °C, indicating full lubrication, while maintaining hydrophobicity. At 150 °C, exceeding the glass transition temperature of the ball material (PEEK), the ball softens and increases the wear rate to 0.324 × 10 −6 mm 3 N −1 m −1 . The wear mechanism in this stage is still dominated by oxidative wear due to high temperature. Interestingly, at 200-250 °C, the friction coefficient follows a different trend, initially increasing, then decreasing, and stabilising after 800-1000 s. At stabilization, the friction coefficient matches that of unmodified BMG, while the wear rate rises to 17.205 × 10 −6 mm 3 N −1 m −1 , attributed to the thermal decomposition of SAMs and lubrication film failure. sam softening promotes adhesive wear and becomes the dominant mechanism. Meanwhile, interfacial property analysis systematically reveals the temperature-dependent effects on the chemical bonding, molecular ordering, and adsorption density of SAMs, elucidating their collective impact on wear evolution. This study demonstrates the exceptional wear resistance of SAMs-modified Zr-Cu-Al-Ni BMG, particularly at 110 °C, and further reveals that molecular interface engineering provides a novel design strategy for high-temperature wear-resistant metallic systems beyond conventional bulk strengthening approaches.
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