ChemSusChem
·
2024
·
IF 7.5
Shiwei Song,Yanhui Wang,Yucan Liu,Pengfei Tian,Jianbing Zang
Graphical The Ni-boride/phosphide particles anchored amorphous B-doped carbon layer with hierarchical porous characteristics in Ni foam (Ni 3 P/Ni 3 B/B−C/NF) was constructed for overall water splitting. Benefitting from the synergistic effect between Ni 3 P and Ni 3 B, the amorphous B−C layer and high space utilization of NF, the Ni 3 P/Ni 3 B/B−C/NF electrocatalyst exhibited a desirable activity and durability for water electrolysis. The rational design of efficient and economical bifunctional electrocatalysts remained a challenge for overall water electrolysis. In this work, the Ni-boride/ phosphide particles anchored amorphous B-doped carbon layer with hierarchical porous characteristics in Ni foam (Ni 3 P/Ni 3 B/B−C/NF) was fabricated for overall water splitting. The Boroncarbide (B 4 C) power was filled and fixed in the NF interspace through the electroplating and electroless plating, and then annealed in vacuum high temperature. The amorphous B−C layer derived from the B4 C not only speeded up the electron transport, but also cooperate with Ni-boride/phosphide to enhance the electrocatalytic activity for HER and OER synergistically. Furthermore, the hierarchical porous architecture of Ni 3 P/Ni 3 B/B−C/NF increased space utilization to load more active materials. The self-supported Ni 3 P/Ni 3 B/B−C/NF electrode possessed a low overpotential of 212 and 280 mV to deliver 100 mA cm −2 for HER and OER, respectively, and high stability for 48 h. In particular, the electrolyzer constituted with the Ni 3 P/Ni 3 B/B−C/NF bifunctional electrocatalyst only required a voltage of 1.59 V at 50 mA cm −2 for water electrocatalysis under alkaline medium, and demonstrated long-term stability for 48 h. This study provides a new technical path for the development of bifunctional of transition metal borides to promote the application of hydrogen production from water splitting.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Chunmiao Liu,Yanchun Tong,Chang Liu,Meng Xu,Haibin Sun,Shigang Wu,Yujun Zhao,Jiao Li,Xue Guo,Yurun Feng
Faced with severe electromagnetic wave (EMW) pollution, the development of high-performance EMW absorbers remains a formidable challenge. In this study, SiBCN/Ni fibers containing uniformly dispersed Ni 2 Si nanoparticles were synthesized by electrospinning method with polymer-derived ceramics method, and their electromagnetic properties were evaluated. The low permeability threshold of the fibers ensures sufficient conduction loss effect. The in situ grown Ni 2 Si nanoparticles provide a magnetically coupled network, which is more conducive to obtaining excellent impedance matching. Furthermore, the presence of β-SiC, SiO 2 , and Si 2 N 2 O generates numerous heterogeneous interfaces (e.g., C-SiC and C-Ni 2 Si), leading to enhanced interfacial polarization through the accumulation of charges. As a result, the prepared SiBCN/Ni fibers exhibit impressive EMW absorption properties . At a Ni content of 1 wt%, the effective absorption band (EAB) is 4.32 GHz (13.68–18 GHz). At a Ni content of 1.5 wt%, the minimum reflection loss (RL min ) is −52.98 dB, and the sample has excellent radar scattering capabilities, which is verified by CST Microwave Studio simulations. Therefore, SiBCN/Ni fibers are promising as excellent EMW absorbing materials in practical applications.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Bofang Zhou,Yiwei Chen,Wenqiang Tang,Xueyan Zhao,Haoliang Tao,Zhidong Chen,Chongxi Bao,Hongxia Zhang,Liangzhu Zhu
Replacing the ceramic support of a conventional solid oxide fuel cell (SOFC) with a metal support is an active research trend for improving the robustness of SOFC. We report metal-supported SOFC (M-SOFC) prepared based on Ni–Fe alloy supports with different Ni to Fe atomic ratios. The results show a Ni to Fe atomic ratio of 7:3 ratio has a more homogeneous and balanced microstructure and mechanical strength. Besides metal support selection, the type of cathode also plays a key role on improving the performance of a M-SOFC. In this study, we choose SSC and SDC as cathode materials and prepare composite cathodes containing different weight ratios of SSC to SDC, i.e., 3:7, 5:5, and 7:3 with a cathode sintering temperature of 950 and 1050 °C are compared as well. The combination of a Ni to Fe atomic ratio of 7:3, a SSC to SDC weight ratio of 5:5, and a cathode sintering temperature of 1050 °C yields the highest performance. The SSC-SDC55 cathode on symmetrical cell test shows a very low polarization resistance of 0.035 Ω cm 2 at 800 °C. A tested single-cell consisting layers of Ni–Fe|NiO-YSZ|YSZ|GDC|SSC- SDC achieved a maximum power density of 1.4 W cm −2 at 800 °C, reaching one of the highest performances for Ni–Fe supported M-SOFC, proving the advantages of using Ni–Fe alloy as support for M-SOFC. The stability of our Ni–Fe alloy supported M-SOFC still needs improvement.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jingjing Xie,Wei Jiang,Fei Tang,Ying Gao,Hongyu Li,Jiyang Li,Deyang Zhao,Zhiqiang Lv,Zhenglong Yang,Yanbin Xu
La 2 O 3 doped hollow porous Ni/NiCo 2 O 4 /C microspheres (NCO-La) are prepared by solvothermal method. The doping of porous La 2 O 3 nanoparticles is crucial to reduce the crystalline grain size of NiCo 2 O 4 and the internal resistance of the electrode, which facilitates ionic and electronic transportation efficiency. Hollow porous NCO-La microspheres with carbon networks have good mechanical strength and can effectively suppress volume expansion and aggregation. The combination of high-conductivity carbon and metallic nickel improves electronic conductivity. The nanostructure in the composite microspheres brings abundant active sites, which facilitates rapid redox of metal ions and allows rapid insertion and removal of Li + , consequently effectively improving the specific capacity. Benefiting from the synergy of well-designed nanostructure, the material shows high Li + storage performance and good stability. At 0.2 A g −1 after 250 cycles, the discharge specific capacity of NCO-La0.1 (1596.2 mAh g −1 ) is far better than NiCo 2 O 4 (655.6 mAh g −1 ) without La 2 O 3 doping. Such design concept of nanostructures provides a promising way to develop high-performance anode materials for LIBs.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Guoshu Deng,Guangze Nie,Xuehui He,Lin Li,Zhenkun Sun,Lunbo Duan
Conversion of CO2 into value-added chemicals is regarded as an effective way to reduce carbon emissions and improve the carbon recycling economy. In the process of hydrogenation of CO2 to CH4, nickel (Ni) has been extensively investigated due to its promising activity and easy availability. However, the inferior performance at low temperatures of Ni-based catalysts and the tendency of sintering at high temperatures lead to a rapid decline in activity, which hinders their large-scale applications. In this study, mesoporous silicas with highly ordered mesoporous structures but different pore symmetries and textural properties have been investigated as supports to synthesize Ni-based catalysts modified by La2O3. The effect of mesoporous symmetries and textural properties of the silica support on catalytic performance has been reasonably revealed. The catalysts supported on optimized silica with bicontinuous three-dimensional cubic pore symmetry exhibit considerably enhanced activity and stability in long-term CO2 methanation, which is attributed to the high dispersion of metal particles and the better mass transfer performance of interconnected mesopores in the silica support.
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ADVANCED ENGINEERING MATERIALS
·
2024
·
IF 3.4
Lan Gao,Yun Zhang,Shihua Ding
Herein, Mg 1− x Ni x ZrTa 2 O 8 ( x = 0, 0.1, 0.3, 0.5, 0.8, 1) ceramics are synthesized using a solid-phase reaction method. Ni 2+ replacing Mg 2+ improves the drawback of high sintering temperature and poor temperature stability. The samples have a relative density above 95% at the optimal sintering temperature. The sintering temperature of Mg 1− x Ni x ZrTa 2 O 8 reduces from 1475 to 1400 °C. And single-phase Mg 1− x Ni x ZrTa 2 O 8 ceramics with monoclinic wolframite structures are analyzed. According to the Rietveld refinement results, with the doping of Ni 2+ , the transformation of unit cell volume leads to the shift of the main peak in the X-Ray diffraction pattern to a higher angle in 0 ≤ x ≤ 0.3 and a lower angle in 0.5 ≤ x ≤ 1. The ε r of Mg 1− x Ni x ZrTa 2 O 8 is comparable to MgZrTa 2 O 8 . At 1400 °C, the Q × f is increased from 10 598 GHz in the undoped sample to 43 041 GHz in Mg 0.9 Ni 0.1 ZrTa 2 O 8 ceramic. The absolute values of τ f of ceramic samples decrease with the excessive Ni 2+ . The desirable dielectric properties ( ε r = 20.79, Q × f = 43 041 GHz, τ f = −33.04 ppm °C −1 ) are obtained at 1400 °C. Ni substitution is effective for MgZrTa 2 O 8 ceramic to optimize densification temperature and retain the high Q × f value.
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MOLECULES
·
2024
·Vol. 29
·期 15
·3633
·
IF 4.2
Shihao You,Jing Di,Tao Zhang,Yufeng Chen,Ruiqin Yang,Yesong Gao,Yin Li,Xikun Gai
To explore advanced oxidation catalysts, peroxymonosulfate (PMS) activation by Co-Ni-Mo/carbon nanotube (CNT) composite catalysts was investigated. A compound of NiCo2S4, MoS2, and CNTs was successfully prepared using a simple one-pot hydrothermal method. The results revealed that the activation of PMS by Co-Ni-Mo/CNT yielded an exceptional Rhodamine B decolorization efficiency of 99% within 20 min for the Rhodamine B solution. The degradation rate of Co-Ni-Mo/CNT was 4.5 times higher than that of Ni-Mo/CNT or Co-Mo/CNT, and 1.9 times as much than that of Co-Ni/CNT. Additionally, radical quenching experiments revealed that the principal active groups were1O2, surface-bound SO4•−, and •OH radicals. Furthermore, the catalyst exhibited low metal ion leaching and favorable stability. Mechanism studies revealed that Mo4+on the surface of MoS2participated in the oxidation of PMS and the transformation of Co3+/Co2+and Ni3+/Ni2+. The synergism between MoS2and NiCo2S4reduces the charge transfer resistance between the catalyst and solution interface, thus accelerating the reaction rate. Interconnected structures composed of metal sulfides and CNTs can also enhance the electron transfer process and afford sufficient active reaction sites. Our work provides a further understanding of the design of multi-metal sulfides for wastewater treatment.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2011
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IF 1.974
Jinqiang Jiang,Chao Gou,Jing Luo,Chenglin Yi,Xiaoya Liu
A new coumarin based colorimetric nickel sensor 1 with high selectivity and sensitivity toward Ni 2+ ion was reported. The absorption maximum of 1 shows a large red shift from 341 nm to 540 nm (Δ = 200 nm) in the presence of Ni 2+ ion, and the resulted color change from colorless to pink upon addition of Ni 2+ is very easily observed by the naked eye, while other metal ions , such as Zn 2+ , Cd 2+ , Cu 2+ , Fe 3+ , Ag + , Pb 2+ , alkali metal and alkaline earth metal cations do not induce such a change. By the “naked eye”, the detection limit of Ni 2+ is as low as 0.5 μM in solution, which is lower than the current American Environmental Protection Agency (EPA) standard for drinking water . As far as we are aware of, this is the first reported colorimetric chemosensor capable of detecting Ni 2+ ion.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Shengkang Zhang,Yu Xiao,Qiwei Feng,Ziqiang Lei
The oxygen evolution reaction (OER) plays a pivotal role in the hydrolysis process of zinc–air batteries. Consequently, it is essential to develop cathode catalysts with both cost-effectiveness and high oxygen evolution activity. In this study, we synthesized the FeFFIVE-1-Ni two-dimensional (2D) metal–organic framework (MOF) nanosheets via a straightforward solvothermal approach and oxidized them in an air atmosphere. During the calcination process in an air atmosphere, the heteroatoms (O, F) within the FeFFIVE-1-Ni 2D MOF nanosheets combine with iron and nickel metal ions, forming FeOF and NiF2 compounds. The synergy between these compounds and the creation of surface cracks during calcination yield catalytic active power and catalytic active sites essential for the oxygen evolution reaction. Notably, the overpotential of FeFFIVE-1-Ni 2D MOF nanosheets calcined in air under alkaline test conditions (η10 = 286 mV) was lower than that of commercial RuO2 catalysts (η10 = 355 mV). This work presents an effective strategy for replacing noble metal catalysts such as RuO2 by simply treating fluorinated metal–organic frameworks.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Huibin Liu,Xiao Chen,Shiyao Liu,Yan Du,Wenjun Zhu,Zhengwen Hu,Marc Armbrüster,Changhai Liang
Using the low-temperature molten salt strategy, Al–Ni intermetallic compound catalysts (AlNi, Al3Ni2, and AlNi3) with efficiently separated nickel sites are successfully prepared by reducing the oxides of stoichiometric mixtures of the corresponding elements. Applying these materials as catalysts in the semihydrogenation of phenylacetylene to styrene suggests that the AlNi3-derived catalyst exhibits superior catalytic performance, achieving a remarkable styrene selectivity of 88% at a high conversion of phenylacetylene (99%). In conjunction with reaction kinetics, in situ infrared (IR) measurements, and density functional theory (DFT) calculations, the electron-rich Ni active center, created through electron transfer from Al atoms, plays a pivotal role in reducing the surface adsorption energy of styrene and thus enhancing the semihydrogenation selectivity. In addition, the magnetic AlNi3-derived catalysts exhibit excellent stability and can be easily separated by using a magnet.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xue Zhang,Chunxia Wu,Ye Bu,Ying Liang,Zhitong Wang,Jing Li,Daoxiong Wu,Xinlong Tian,Peilin Deng
Exploring efficient and durable methanol oxidation reaction (MOR) electrocatalysts is crucial for the industrialization of direct methanol fuel cells. Herein, we designed MOR electrocatalyst of PtRu/Ni-N-C, in which PtRu nanoclusters (PtRu NCs) are loading on nitrogen-doping carbon support anchoring Ni single atoms (Ni-N-C). Compared with PtRu NCs and Pt/C, PtRu/Ni-N-C exhibits more excellent MOR activity with 2050 mA mg pt -1 and tougher anti-CO toxicity over 6000 s CA test, proving that the synergetic effect of nanoclusters and single atoms support enhance MOR activity and resistance to anti-CO toxicity. The fine spectroscopy analysis and density functional theory (DFT) calculations demonstrate that the strong metal-support interaction (SMSI) between nanoclusters and single atoms, facilitating the electron transfer of about 0.4 e from PtRu NCs to the Ni-N-C support, effectively reduces the d -band center of Pt to weaken the adsorption capacity of *CO and *COOH intermediates. Moreover, the synergistic sites derived PtRu NCs coupling Ni single atoms accelerate *OH adsorption, promoting the adjacent *CO removal. This work offers deep insight into the SMSI effect between nanoclusters and single atoms support to design the efficient Pt-based MOR electrocatalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yajing Hu,Yong Men,Shuyi Xu,Yuanfen Feng,Jinguo Wang,Kaijie Liu,Yibo Zhang
Constructing the interface of Ni/Y 2 O 3 heterogeneous catalyst is a feasible strategy for efficient catalyst design in CO 2 methanation, which can create the active Y–O–Ni interfacial sites by utilizing the interaction between Ni and Y 2 O 3 . In this work, the strategy of using different nickel precursors (nickel nitrate, nickel acetate, basic nickel carbonate and nickel citrate) was used to prepare various Ni-based catalysts supported on Y 2 O 3 , which were estimated for their catalytic performance on CO 2 methanation. The catalysts were characterized based on BET, XRD, TEM, H 2 -TPR, XPS and CO 2 -TPD, etc. The results indicated a close correlation between the metal dispersion and particle size of Ni/Y 2 O 3 catalysts and the nickel precursor employed. The Y–O–Ni interface structure in Ni/Y 2 O 3 catalysts, associated with basic sites, provides a richer source of basic sites, offering more active sites for CO 2 adsorption and activation. Ni/Y 2 O 3 catalyst prepared with nickel nitrate as the precursor exhibited characteristics such as a highly enhanced nickel dispersion, a smaller nickel particle size, and more abundant metallic Ni 0 sites. Moreover, nickel nitrate-derived Ni/Y 2 O 3 catalyst exhibited optimal catalytic activity, achieving a CO 2 conversion rate of up to 92 % at 300 °C, with 100 % selectivity to CH 4 , and displaying good stability over 30 h. Therefore, the dispersion of Ni and the size of Ni particles could be controlled by adjusting the precursor, which is closely associated with the catalytic activity of Ni/Y 2 O 3 catalyst. This work unveils the interface-property relationship of Ni/Y 2 O 3 catalysts and provides a new insight into strategy of constructing more effective Ni-based catalyst for CO 2 methanation through the controlled nickel precursor.
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