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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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Tingxue Li,Siling Chen,Xichen Yu,Yang Hu,Hongmei Qin,Chuanxi Xiong,Quanling Yang,Zhuqun Shi
To enhance the electrochemical performance of flexible electronic devices, it is crucial to develop electrode materials with high specific capacitance. The nitrogen-doped carbon aerogel (CA) was synthesized through freeze-drying and carbonization of TEMPO-oxidized cellulose nanofibril aerogel. Inspired by porous media interface strategies, a nitrogen-doped carbon/ nickel-cobalt (Ni-Co) layered double hydroxide composite aerogel (CA-N@LDH) with a hierarchical porous structure was fabricated using a solution deposition method with controlled precursor concentration. X-ray diffraction (XRD) and scanning electron microscopy (SEM) characterization confirmed that the Ni-Co layered double hydroxides were uniformly loaded on the surface of the mesoporous carbon framework in a flower-like layered structure, achieving a specific surface area of 111.8 m²/g and pore size mainly of around 5 nm. When the addition of the precursor was 0.4 mmol, the composite exhibited a specific capacitance of 1892.7 F/g at a current density of 1 A/g, which represents a 6.7 times enhancement compared with pure nitrogen-doped (N-doped) carbon aerogel. X-ray photoelectron spectroscopy (XPS) analysis revealed the synergistic pseudocapacitive contributions from the Co²⁺/Co³ ⁺ and Ni²⁺/Ni³ ⁺ redox pairs, while the graphite-like N introduced by N doping reduced the charge transfer resistance by 42%. This study provides new insights into the design of composite electrodes with high specific capacitance and stability.
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Materials Today Chemistry
·
2026
·
IF 7.4
Kun Wang,Huihui Yan,Liping Zhao,Ming Wen,Jing Liu,Peng Zhang,Lian Gao
Dry reforming of methane (DRM) offers a promising route for syngas production while mitigating two greenhouse gases (CH 4 and CO 2 ). However, the surface thermodynamics of reactant adsorption remain elusive due to the lack of quantitative tools. Herein, we synthesize self-supporting hollow Al 2 O 3 nanofibers decorated with Ni, NiCo, and NiCu alloys via blow spinning, eliminating the need for pelletization. Among these, NiCo/Al 2 O 3 exhibits superior activity (85% CH 4 conversion at 800 °C) and coking resistance (0.84 wt% carbon after 50 h). For the first time, we quantify the adsorption enthalpies of CH 4 , CO 2 , and H 2 on these catalysts using gas adsorption calorimetry. Notably, CH 4 —a stable tetrahedral molecule—chemisorbs exothermically on Ni sites at 298 K, with enthalpies of −55.2 (NiCo), −78.2 (NiCu), and −87.5 kJ mol −1 (Ni). A strong structure-enthalpy-activity correlation emerges: overly exothermic adsorption hinders catalytic turnover by stabilizing surface intermediates. This thermodynamic framework provides a lens to rationally design DRM catalysts.
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INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Yanmei Chen,Qirtas Malik,Bolun Wang,Yu Wang,Mian Li,Tao Bo,Jianming Xue,Jianxin Zou,Qing Huang
The development of earth-abundant, low-cost, highly active catalysts to accelerate hydrogen absorption/desorption kinetics in Mg-based materials is critical for hydrogen energy applications. Here, we synthesize three MAX phases with nonconventional A-site elements─Nb2FeC, Nb2NiC, and Nb2CuC─and directly incorporate them into MgH2 matrices without hazardous HF etching. All three MgH2-10 wt % Nb2AC (A = Fe, Ni, Cu) composites exhibit a reduction in onset dehydrogenation temperature from 320 °C to approximately 190 °C, and their dehydrogenation temperature and kinetic behavior are markedly superior to Nb2AlC, demonstrating that substituting the A-site element Al with late transition metals substantially enhances catalytic performance toward MgH2 dehydrogenation. Among them, the MgH2-10 wt % Nb2NiC composite shows optimal performance, releasing ∼6.30 wt % H2 at 300 °C within 10 min and absorbing ∼5.01 wt % H2 at 175 °C within 3 min, while maintaining good cyclic stability. Experimental and theoretical results jointly confirm that Nb2NiC functions as an efficient electron-mediated catalyst, weakening Mg–H bonds and promoting H2 dissociation via interfacial electron transfer, thus significantly improving hydrogen storage kinetics.
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高影响因子
JOURNAL OF CATALYSIS
·
2026
·
IF 6
Yue Chen,Chen Liao,Yinhua Yao,Huan Liu,Weizhen Zhang,Yuping Qiu,Huihuang Fang,Chongqi Chen,Yu Luo,Lilong Jiang
Ammonia decomposition is an attractive route for carbon-free hydrogen production, yet Ni-based catalysts are limited by insufficient activity and severe sintering at high temperatures. Herein, Ni supported on Ce-induced perovskites were employed in ammonia decomposition. Notably, we found that site-specific Ce occupation in the support governs the defect chemistry, Ni stabilization, and catalytic performance by constructing LaAlO 3 –Ce-based supports with distinct Ce locations. When Ce is present as a separate CeO 2 phase, a LaAlO 3 -CeO 2 composite is formed, in which interfacial CeO 2 domains moderately improve Ni dispersion and suppress sintering via moderate anchoring. In contrast, A-site incorporation of Ce into the LaAlO 3 lattice induces pronounced lattice distortion and abundant oxygen vacancies, significantly enhancing support basicity and interfacial electron donation. These defect-rich environments stabilize electron-enriched Ni species, strengthen metal-support interactions, and facilitate the recombination and desorption of surface N species, thereby accelerating N* recombination during ammonia decomposition. Consequently, the Ni/LaCeAlO 3 achieves over 90% NH 3 conversion at 600 ℃ with a hydrogen production rate of 524 mmol‧g Ni −1 ‧min −1 , outperforming Ni/LaAlO 3 and Ni/LaAlO 3 -CeO 2 while maintaining excellent stability over 60 h. Kinetic analysis, together with NH 3 -TPSR and in situ DRIFTS, suggests a stepwise dehydrogenation pathway with facilitated H removal and accelerated N 2 formation, directly associated with Ce-induced oxygen vacancies and defect-mediated electronic modulation. This work demonstrates that A-site-specific Ce incorporation in perovskite oxides offers a decisive advantage over conventional composite supports, providing an effective strategy for defect engineering and the development of active and durable non-noble metal catalysts for ammonia-to-hydrogen conversion.
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MATERIALS TRANSACTIONS
·
2026
·Vol. 67
·期 6
·974-980
·
IF 1.7
Guokang Zhang,Hui Fan,Shankui Wang,Yuhang Li
This study proposes a novel magnetic field-assisted jet electrodeposition method for preparing Ni–Co–Al2O3 composite coatings, in order to enhance the composite coating performance. The effects of magnetic field strength and particle concentration on the microstructure and properties of the coatings were systematically investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), microhardness testing, and wear tests. The results indicate that under optimal conditions (0.6 T magnetic field and 10 g/L Al2O3 concentration), the composite coating exhibits a dense and uniform surface, a high Al2O3 incorporation content of 3.63%, a maximum microhardness of 584.8 HV, a low friction coefficient of 0.18, a reduced wear rate of 12 mg/min.
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DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Yuchen Zhang,Yuying Feng,Miao Zhang,Zhiwei Yu,Xian Sun,Li Zhang
The Ni@SNC catalyst was prepared through a two-step pyrolysis-solvothermal method. • Sulfur species selectively etched amorphous carbon layers, exposing more active sites during doping. • Sulfur, as a doping atom, modulated the electronic structure of the active sites and enhanced the CO 2 RR performance. • The Ni@SNC catalyst achieved a maximum FE CO of 94.6%, with a current density of 13.4 mA cm -2 at this point. Utilizing renewable energy to catalyze the reduction of CO 2 into diverse high-value products represents an effective pathway for mitigating carbon emissions. Nickel-based catalysts benefit from natural abundance and low cost. Moreover, their CO 2 activation capability and *CO desorption characteristics can be optimized through rational structural design to modulate the adsorption energy of reaction intermediates. These properties make them viable alternatives to noble metal catalysts. In this study, a two-step method termed “pyrolysis-doping” was employed to synthesize the Ni@SNC catalyst, which consists of small-sized Ni nanoparticles supported on S N co-doped carbon, facilitating efficient electrocatalytic CO 2 reduction reaction (CO 2 RR). In the Ni@SNC structure, the coordination of surface Ni nanoparticles with N generates active sites, while S doping modulates the electronic state of these sites to optimize the adsorption of *COOH and the desorption of *CO. Performance tests indicated that Ni@SNC achieved a maximum CO Faradaic efficiency (FE CO ) of 94.6% at −0.9 V (vs. RHE), with a corresponding CO partial current density (j CO ) of 13.4 mA cm −2 , while exhibiting excellent stability during an extended electrolysis. Various characterizations and experiments have shown that S doping selectively etched the carbon layer, thereby increasing the electrochemically active area (ECSA). Furthermore, S doping modulated the electronic configuration of Ni N sites, enhancing the balance between adsorption and desorption of reaction intermediates. This work thus provides a new design method for creating efficient and stable non-precious metal CO 2 reduction catalysts. Download: Download high-res image (149KB) Download: Download full-size image
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International Journal of Applied Ceramic Technology
·
2026
·Vol. 23
·期 3
·e70215
·
IF 2.6
Yu Fu,Sheng Jiang,Biao Wu,Xiaoli Deng,Xiaochun Wang
Ceramic metallization provides an effective insulation strategy for reversible solid oxide cell (RSOC) pipeline connections that are prone to side short-circuiting. In this work, 95 wt.% Al 2 O 3 ceramics were metallized by the activated Mo–Mn method, and 15 metallization formulations with different Mo, MnO, Al 2 O 3 , and SiO 2 contents were designed to optimize the microstructure, phase composition, and bonding strength of the metallized layer. The results show that, after sintering at 1400°C for 1 h, the optimal formulation consists of 70 wt.% Mo, 9 wt.% MnO, 6.3 wt.% Al 2 O 3 , and 14.7 wt.% SiO 2 . Under this condition, the Mo skeleton is continuous, the activator melt forms a glassy phase, and a reliable transition layer is developed at the ceramic/metallization interface, yielding a shear strength of 146.3 MPa. Electroless Ni–P post-plating on the optimized metallized surface produces a dense and continuous coating with typical nodular morphology and an average thickness of about 15–17 µm. The plated layer exhibits a relatively uniform hardness of 382.84 HV and maintains good structural integrity after 300 thermal-shock cycles, demonstrating promising potential for RSOC-related ceramic-to-metal insulating connection components.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yong Wang,Guangshuo Wang,Xiaoxiong Li,Yue Han,Yuanzhe Li,Yanlei Zhang,Yalei Li,Yusen He,Zhixiao Zhang,Yichuan Huang
The redox kinetics of lithium polysulfides (LiPSs) result from the intrinsic insulating nature of sulfur and the weak interaction between hosts and LiPSs. Constructing heterostructures with built-in electric fields is a promising strategy to accelerate charge transfer; however, the limited active sites and suboptimal electronic configuration at the interface often restrict their catalytic efficiency. Herein, we propose an atomic-level modulation strategy by incorporating isolated Cu atoms into a Mott-Schottky Ni/NiO heterostructure to create a multifunctional electrocatalytic layer for Li S batteries. The introduction of atomic Cu not only induces abundant oxygen vacancies but also triggers a selective upward shift of the d-band center, which synergizes with the interfacial electric field to optimize the electron redistribution. This electronic restructuring significantly enhances the orbital hybridization between the host and LiPSs, thereby strengthening the chemical adsorption and effectively lowering the decomposition energy barrier of Li 2 S. Consequently, the Cu-Ni/NiO modified separator exhibits superior catalytic activity, achieving a high initial capacity of 1353 mAh g −1 and an ultralow decay rate of 0.056% per cycle over 500 cycles at 1C. Even under harsh conditions with high sulfur loading (8.4 mg cm −2 ) and lean electrolyte, the pouch cell delivers a high areal capacity of 4.16 mAh cm −2 and excellent flexibility, demonstrating its great potential for practical applications. Atomic Cu sites are incorporated into the Mott-Schottky Ni/NiO heterostructure to modulate interfacial electron redistribution. Atomic Cu doping simultaneously improves electrical conductivity, optimizes the electronic structure, and enhances catalytic activity. The resulting Cu-Ni/NiO heterocatalyst delivers high polysulfide adsorption capacity and accelerated conversion kinetics, effectively suppressing the shuttle effect and boosting the overall electrochemical performance of Li S batteries. Download: Download high-res image (194KB) Download: Download full-size image
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Yanping Xie,Geng Zhao,Dongli Xu,Xiaofeng Yin,Liang Fang
The construction of heterogeneous interface is considered as an efficient approach to improve the intrinsic catalytic activity of hydrogen evolution electrocatalysts. Here, a self-supported heterostructured electrocatalyst (Ni-MoO 2 /WO 2 ) is fabricated by anchoring porous Ni-MoO 2 /WO 2 nanoflakes with a densely intermediate layer of Ni-MoO 2 /WO 2 nanoparticles on Ni foam through a three-step procedure involving corrosion, hydrothermal and annealing treatment. The Ni-MoO 2 /WO 2 heterostructure can modulate the interfacial electronic state and accelerate the reaction kinetics. The middle layer tightly anchors the catalytic layer to the substrate, preventing the detachment of the catalyst under high current density. The Ni-MoO 2 /WO 2 electrode exhibits a low overpotential of 30 mV at 10 mA cm −2 , a small Tafel slope of 63 mV dec −1 and excellent catalytic stability at 50 mA cm −2 beyond 50 h toward the hydrogen evolution reaction in alkaline solution. This work presents a new strategy to develop non-precious electrocatalysts with high performance for alkaline HER.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Qi Liu,Wenrou Yu,Anping Liu,Lianjie Zhou,Wen Tang,Yingzhou Huang
Multiple Synergistic SERS Enhancement of 3D micro-nano Ni-foam@MoS₂ • Overcomes EBC matrix interference for ultrasensitive 2.95 nM lactate detection • AI algorithms decode complex SERS spectra for non-invasive health monitoring. To address the critical demand for highly sensitive sensing interfaces in non-invasive exhaled breath condensate (EBC) analysis, this study develops a high-performance SERS substrate featuring interlaced, needle-like MoS₂ nanoclusters grown in situ on a 3D nickel foam scaffold (Ni-foam@MoS₂). This architecture effectively overcomes the severe signal heterogeneity and poor wearable compatibility that typically plague traditional plasmonic metal substrates. The system synergizes multiple coupled SERS enhancement mechanisms: the 3D porous scaffold and interwoven needle-like arrays form abundant optical microcavities. These microcavities effectively confine incident light and significantly enhance light-matter interactions, thereby inducing electromagnetic enhancement. Concurrently, the interlaced MoS₂ arrays not only efficiently concentrate trace analytes but also induce substantial chemical mechanism via vigorous charge transfer. Consequently, the substrate achieves an outstanding average enhancement factor of 1.88 × 10 9 , alongside superb signal reproducibility and long-term environmental stability. By deploying this Ni-foam@MoS₂ substrate for the rapid off-line analysis of simulated exhaled breath condensate (EBC), we achieved the ultrasensitive detection of lactate (LA), a critical metabolic biomarker, with a limit of detection as low as 2.95 nM. Furthermore, coupling these complex spectral datasets with advanced artificial intelligence algorithms enabled the highly accurate classification of concentration-dependent LA spectral variations, demonstrating significant proof-of-concept potential for mask-integrated biomolecular sensing and non-invasive physiological monitoring.
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Nanomaterials
·
2026
·Vol. 16
·期 13
·820
·
IF 4.8
Xiaomin Tian,Yuan Cao,Huilin Zhou,Fanjie Tan,Ziqin Zhang,Liying Pei,Yi Ma,Jianzhi Gao,Wenliang Zhu,Minghu Pan
Tuning the d -band electronic structure of non-noble-metal catalysts is a central strategy for an alkaline hydrogen evolution reaction (HER), yet how composition controls the d orbital in multi-Wyckoff-site layered systems remains insufficiently understood. Here, layered (Fe 1- x Ni x ) 3 GaTe 2 single crystals ( x = 0.2–1.0) were synthesized by the self-flux method as a platform to address this question. Single-crystal XRD and EDS confirm that Ni is uniformly incorporated into the parent P6 3 /mmc framework while inducing a composition-dependent lattice evolution. Electrochemical measurements in 1.0 M KOH reveal a clear volcano-shaped composition dependence, peaking at x = 0.6, where the lowest overpotential, the smallest Tafel slope (94 mV dec −1 ), the lowest charge-transfer resistance and the largest double-layer capacitance are simultaneously reached. First-principles calculations show that Ni doping reshapes the Fe-site d orbital strongly composition-dependent rate: the Fe d -band center upshifts rapidly by ~0.5 eV between x = 0.4 and x = 0.6, while the Ni d -band center stays nearly fixed in the same composition range. The maximum of HER activity therefore aligns with a steep upshift of the Fe d -band center rather than with the Ni content itself. Charge-density mapping of (Fe 0.4 Ni 0.6 ) 3 GaTe 2 further demonstrates that the electron-enriched regions are located on the Fe and interlayer Ni3 sublattices that dominate the d states near E F .
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