CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Feng Liu,Ping Shi,Guimei Shi,Di Yu,Lei Ding,Jingjing Qi,Yuhan Wu,Yusheng Wu,Xudong Sun,Laishi Li
By utilizing a molecular-scale precursor engineering strategy, Ni nanoparticle-embedded boron carbon nitride nanotube heterostructures (BCNNT/Ni) were successfully constructed through polyethylene glycol-mediated spatial confinement pyrolysis. The precisely controlled thermal delamination process enables atomic-level architectural precision in creating gradient dielectric-magnetic heterointerfaces with tunable impedance matching characteristics. The experimental results demonstrate that the fabricated BCNNT/Ni nanocomposites display outstanding electromagnetic wave (EMW) absorption capabilities, especially within the high-frequency range. Through modulating the Ni proportion, BCNNT/Ni exhibits a minimum reflection loss of −50.82 dB at a frequency of 16.3 GHz, a thickness of merely 2.0 mm, and an effective absorption bandwidth of 6.12 GHz. The BCNNT/Ni nanocomposite prepared by this facile and low-cost pyrolysis method shows a broad application prospect in the EMW absorption field through multi-scale interfacial polarization and synergistic dielectric-magnetic coupling mechanisms.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wendi Wang,Jianxin Wang,Danfeng He,Xin Huang,Yutong Yang,Xi Chen,Lijie Zhao,Hong Pan,Jun Zhang
Layered double hydroxides (LDHs) are promising electrode materials for supercapacitors, owing to their high theoretical capacitance and excellent redox activity arising from their unique layered structure and the synergistic effects of bimetallic elements. Among them, NiV-LDHs stand out as a promising candidate for high-performance capacitors, since the + 2/+ 3 valence states of nickel and the multi-valence states of vanadium (+3/+4/+5) synergistically facilitate rapid and reversible pseudocapacitive reactions, significantly enhancing specific capacitance. However, the high-coordination structure of V 5 + tends to collapse during charge-discharge cycles, leading to reduced cycling stability. To address these issues, this study proposes a dynamic electronic balancing strategy to regulate electron transfer from Ni to V, thereby suppressing the formation of unstable high-coordination V 5+ and improving the structural stability of NiV-LDH. Through the electrochemical polymerization and intercalation of thiophene-3-carboxylic acid (3TCA) into the LDH layers, the resulting poly(thiophene-3-carboxylic acid) (P3TCA) acts as a conductive bridge to dynamically adjust the electron distribution between Ni and V. This redistribution enhances the activity of Ni while stabilizing the structure of V. The optimized NiV-LDH/NF/P3TCA electrode demonstrates exceptional cycling stability and charge transfer kinetics. Remarkably, it achieves an ultra-high specific capacitance of 2040 F g −1 at 1 A g −1 and maintains 78.72 % of its initial capacity after 5000 cycles, underscoring its potential for high-performance supercapacitor applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2025
·
IF 13.1
Jianhui Liu,Ruizhe Li,Yuan Li,Lina Guo,Zhengyang Xue,Hong Yuan,Shuxin Ouyang
The crystal phase of titanium dioxide (TiO2) has a significant influence on the physicochemical properties and catalytic activities of supported metal catalysts. Herein, we synthesized two catalysts consisting of metallic nickel dispersed on anatase- and rutile-phase TiO2 (a-TiO2 and r-TiO2) supports with a simple impregnation-reduction method and assessed their photothermocatalytic activity for CO hydrogenation. The Ni-loaded r-TiO2 (Ni-r-TiO2) catalyst achieved a CO conversion of 23.3% at a photothermal temperature of 180 °C, which was 5.7 times that of the Ni-loaded a-TiO2 (Ni-a-TiO2) catalyst; meanwhile, the Ni-r-TiO2 catalyst achieved an increased C2+ hydrocarbon selectivity of 73.0% compared with that of the Ni-a-TiO2 catalyst (50.1%). CO-temperature-programmed desorption (CO-TPD), CO pulse experiments, and apparent activation energies of CO revealed the improved CO adsorption and activation abilities of the Ni-r-TiO2 catalyst. In situ diffuse reflectance infrared Fourier transform spectra (in situ DRIFTS) disclosed that the Ni-r-TiO2 catalyst followed direct CO dissociation, which led to the formation of more CH2* intermediates, subsequently yielding C2+ hydrocarbons. This work provides insights into the support design for the preferential formation of value-added chemicals.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Bingchen Li,Zexiong Cui,Yufeng Tao,Jin Xiong,Jinbo Gao,Lihua Liu,Shiwei Song,Pengfei Tian
The slow kinetics of the cathodic hydrogen evolution reaction (HER) present a significant obstacle for alkaline water electrolysis. Consequently, developing non-precious metal HER catalysts with high activity and stability remains a challenge. This study reports a heterostructure catalyst composed of Mo-doped amorphous Ni(OH) 2 nanosheets modified Fe 3 O 4 crystal nanoparticles (Mo-NiOH@Fe 3 O 4 ). This unique structure exhibits a three-dimensional, coral-like structure, which significantly increases the electrochemically active surface area and exposes more active sites to the electrolyte. The incorporation of Mo-doped amorphous Ni(OH) 2 enriches electron density around Fe atoms, modulating their electronic state and optimizing intrinsic activity. As an alkaline hydrogen evolution catalyst, Mo-NiOH@Fe 3 O 4 requires overpotentials of only 23.7 and 140.6 mV to achieve 10 and 100 mA cm −2 , respectively, demonstrating exceptional catalytic activity. Furthermore, it shows negligible performance degradation at 100 mA cm −2 and maintains stability for over 120 h. This work demonstrates that a heterostructure strategy, integrating Mo-doped amorphous Ni(OH) 2 with Fe 3 O 4 , provides a reasonable route for developing low-cost, high-performance HER catalysts.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wenlong Zhang,Chenzheng Liao,Xiaohui Ning
Based on the high safety and low costs, molten salt batteries (Na-S battery, liquid metal battery, ZEBRA battery, etc.) have received more and more attention as large-scale electrical storage technology. However, the high operating temperature of molten salt batteries is still one of the roadblocks that impeded their practical application. Here we present the novel Ni-graphite molten salt battery based on outstanding electrochemical reversibility of the Ni/NiCl 2 redox and intercalation/de-intercalation chemistry of chloroaluminate anions in graphite. By using the low-cost, quaternary inorganic molten salt AlCl 3 /KCl/NaCl/LiCl as electrolyte, the as-designed Ni-graphite battery possesses low operating temperature of 95 °C, and average voltage about 1.7 V. The Ni-graphite battery delivers stable specific capacity of 174 mAh/g at 500 mA/g after 120 cycles, with the capacity retention rate of 98%. In addition, the Ni-graphite battery also shows low material costs about 113.6 $/kWh and high electrode energy density of 289 Wh/kg. This work develops an advanced molten salt battery with low operating temperature and high energy density, as well as provides an alternative means of developing future large-scale power storage equipment based on molten salt batteries.
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Ziwen Hao,Yabin Li,Yutong Pan,Xiaoyu Han,Qiang Wang,Maoshuai Li,Yue Wang,Xinbin Ma
Interaction between metal species and support affects the structural and electronic properties of metal species, thus changing the catalytic behaviour. This work demonstrates regulation of support size is an effective way to optimise the metal-support interaction over Ni/CeO 2 -cube. Smaller ceria cubes promoted formation of smaller Ni particle sizes with higher dispersion, generating stronger interaction between Ni and CeO 2 , and consequently higher turnover frequency for CO 2 methanation. The interaction in Ni/CeO 2 with the smallest ceria size (average ca. 5 nm) provides stronger CO 2 and H 2 adsorption capacity, facilitating the CO 2 methanation with over 99 % CH 4 selectivity at 548–573 K, delivering a CO 2 conversion rate of 327.9 mol CO2 mol Ni -1 h −1 , which is 1.9 and 14.0 times than that of the 12 nm and 20 nm counterparts at 573 K, respectively. In-situ FTIR spectroscopic analysis demonstrates the surface reaction proceeds via a formate pathway, and smaller CeO 2 -cube supported Ni facilitates conversion of carbonate/bicarbonate intermediates to formate species. The metal-support interaction aroused from controlled support size provides a new way to design high-performance methanation catalyst.
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 15
·1144
·
IF 4.3
Huanming Zhuo,Shuangshuang Zhao,Ruijie Xu,Lu Zhou,Ye Li,Yuehuan Peng,Xuelong Rao,Yuqiang Tao,Xing Ou
Surface microstructure of grains vastly decides the electrochemical performance of nickel-rich oxide cathodes, which can improve their interfacial kinetics and structural stability to realize their further popularization. Herein, taking the representative LiNi0.8Co0.15Al0.05O2(NCA) materials as an example, a surface heterojunction structure construction strategy to enhance the interface characteristics of high-nickel materials by introducing interfacial ZnO sites has been designed (NCA@ZnO). Impressively, this heterointerface creates a strong built-in electric field, which significantly improves electron/Li-ion diffusion kinetics. Concurrently, the ZnO layer acts as an effective physical barrier against electrolyte corrosion, notably suppressing interfacial parasitic reactions and ultimately optimizing the structure stability of NCA@ZnO. Benefiting from synchronous optimization of interface stability and kinetics, NCA@ZnO exhibits advanced cycling performance with the capacity retention of 83.7% after 160 cycles at a superhigh rate of 3 C during 3.0–4.5 V. The prominent electrochemical performance effectively confirms that the surface structure design provides a critical approach toward obtaining high-performance cathode materials with enhanced long-cycling stability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xinyu Liu,Xixi Meng,Tao Zhong,Yuxin Wang,Fuying Wu,Hu Liu,Hong Li,Liuting Zhang
Magnesium hydride (MgH 2 ) with its high hydrogen storage capacity (7.6 wt%) and exceptional reversibility, has emerged as a promising solid-state hydrogen storage material. This study designed a polymeric carbon nitride (PCN) supported single-phase Ni catalyst with superior thermal stability and catalytic activity. The optimized PCN-Ni catalyst significantly reduced the initial dehydrogenation temperature of MgH 2 to 192 ºC. At 295 ºC, the composite released 6.10 wt% H 2 within 5 min, and it subsequently absorbed 5.50 wt% H 2 within 5 min at 150 ºC. Compared to pristine MgH 2 , the activation energies for dehydrogenation and hydrogen absorption were reduced by 31.6 % and 29.4 %, respectively. Moreover, the MgH 2 + 10 wt% PCN-Ni composite exhibited remarkable cycling stability, with capacity retention rates of 96.0 % and 96.7 % after 20 hydrogenation/dehydrogenation cycles. In conclusion, this work provides a new perspective on the heterogeneous synergy of transition metal and carbon nitride composite catalysts in promoting the dehydrogenation/rehydrogenation reactions of MgH 2 and lays the foundation for the design and fabrication of highly efficient catalysts in other energy storage related fields.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Wenxing Jiang,Qiqi Wan,Endao Zhang,Yingying Liu,Junbo Hou,Min Yang,Xiaodong Zhuang,Changchun Ke
This study presents a novel direct methylhydrazine fuel cell (DMHFC) utilizing a hydrothermally synthesized Pd-Ni(OH) 2 composite catalyst supported on nickel foam (Pd-Ni(OH) 2 /NF) as the anode. The Pd-Ni(OH) 2 /NF features a three-dimensional hierarchical architecture with dispersed Pd nanoparticles (0.08 mg cm −2 ) chemically anchored via Pd-O-Ni bonds in the Ni(OH) 2 nanosheet matrix, as confirmed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS) analyses. The electrode demonstrates superior electrocatalytic activity for the methylhydrazine oxidation reaction (MHOR), attributed to enhanced active site accessibility, charge transfer efficiency, and optimized mass transport. Differential electrochemical mass spectrometry (DEMS) reveals complete oxidation of hydrazine fragments to N 2 with suppressed NH 3 byproduct formation relative to Pd/C. Systematic optimization of operating conditions yields a peak power density of 30.5 mW cm −2 (oxygen as the oxidant, 80 °C) and 110 mW cm −2 (hydrogen peroxide as the oxidant, 80 °C), with performance trade-offs observed between reaction kinetics and fuel crossover. This work validates the feasibility of DMHFC technology, highlighting the potential of methylhydrazine as a high-energy-density fuel for portable systems, while providing insights into electrode design and performance optimization for advanced energy conversion devices.
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2025
·Vol. 58
·期 38
·385502
·
IF 3.2
Qixiong Zhang,Jiujun Zhu,Yafei Hou,Qi Yang,Hai Jiang,Jing Cuan,Weiping Li
Dielectric capacitors offer fast charge/discharge rates and high-power density but are limited by low energy density, requiring bulky stacking. Although single-layer composites attempt to combine both high dielectric constant and breakdown strength, a trade-off often limits their effectiveness. To resolve this conflict, sandwich-structured composites spatially separate polarization and insulation functions into different layers. However, the abrupt dielectric contrast at interlayer interfaces often results in localized electric field distortion, undermining breakdown reliability. In this work, we develop filler-gradient composites by varying the loading of Ni(OH)2 nanosheets to construct transitional interlayers. This design mitigates electric field imbalance in conventional sandwich structures, enhancing dielectric constant, breakdown strength, and energy density. The results demonstrate that the filler-gradient structure facilitates uniform electric field distribution and enhanced interfacial polarization, resulting in a high energy density of 21.1J cm−3 at 685.5MV m−1, and discharge efficiency of 70.1%.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Xi Li,Haiyong Wang,Kingdom Alorku,Jin Wang,Longlong Ma,Ying Xu
Efficient hydrogenolysis of C-O bonds in lignin offers a promising pathway for producing high-value-added biofuels and chemicals. However, designing an easily synthesized, highly active catalyst for this process remains a challenge. In this paper, a series of Ni-M(Pd, Pt, Ru)/C catalysts were prepared and synergized with NaOH to produce aromatic compounds from β-O-4 model compound (MC). Among the catalyst systems, Ni-0.25 % Pd/C-NaOH completely converted β-O-4 MC at mild conditions (150 °C, 2 MPa H 2 , 3 h) to produce monomers with a yield of 95.6 wt% and excellent selectivity of the bond-breaking products as high as 85.5 %. Recycling tests showed that the Ni-0.25 % Pd/C catalyst remained stable after five cycles, with high activity and without the need for a further reduction before runs. Further, the catalytic system has proven to exhibit high activity for the cleavage of other types of lignin MC, such as 4-O-5, α-O-4, β-O-4 and ether bond (diphenyl ether, benzyl phenyl ether, Guaiacolylglycerol-β-guaiacol ether, benzyl ether) and also effective for lignin from enzymatic cleavage (LEC). Hydrogenolysis of LEC achieved a monomer yield of 34.5 wt%; the molecular weight (555 g/mol) of the hydrogenolysis oligomer was significantly reduced compared to LEC (2872 g/mol). The highly active and stable Ni-0.25 % Pd/C-NaOH catalytic system provides a promising pathway for the efficient hydrogenolysis of lignin and lignin model compounds to produce high-value biofuels and chemicals.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Meng Liu,Caixia Miao,Yumeng Fo,Wenxuan Wang,Yao Ning,Shengqi Chu,Weiyu Song,Ying Zhang,Jian Liu,Zhijie Wu,Wenhao Luo
Precisely tailoring metal single-atoms within zeolite scattfolds and understanding the origin of the unique behavior of such atomically dispersed catalysts are pivotal and challenge in chemistry and catalysis. Herein, we have successfully fabricated Ni single-atoms within BEA zeolite (Ni 1 @Beta) through a facile in situ two-step hydrothermal strategy, notably without using any chelating agent for stabilizing Ni species. With the aid of advanced characterization techniques, such as aberration-corrected high-angle annular dark-field scanning transmission electron microscopy, X-ray absorption spectroscopy, etc., and combined with density functional theory calculations, the nature and micro-environment of isolated Ni species, which are incorporated within 6-membered rings and stabilized by four skeletal oxygens of Beta zeolite, have been identified. The as-obtained Ni 1 @Beta exhibits a superior performance in terms of activity (with a turnover frequency value up to 114.1 h –1 ) and stability (for 5 consecutive runs) in the selective hydrogenation of furfural, surpassing those of Ni nanoparticle analogues and previously reported Ni-based heterogeneous catalysts. This study provides an efficient strategy for the fabrication of non-noble metal single-atoms within zeolites, which could be of great help for the design of metal-zeolite combinations in the chemoselective reactions involved in biomass conversion and beyond.
✓ 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）