SURFACE & COATINGS TECHNOLOGY
·
2026
·
IF 6.9
Xingtao Cheng,Kaijun Wei,Ziqiang Wu,Shilin Guo,Longbo Luo,Yi He
Inspired by biological surfaces such as lotus leaves and Stenocara beetles, superhydrophobic coatings have attracted considerable attention due to their exceptional water repellency, self-cleaning behavior, and corrosion resistance. In this work, Ni-Cu/HDTMS-MX superhydrophobic coatings were fabricated through the co-deposition of MXene with a Ni Cu coating, followed by surface modification using hexadecyltrimethoxysilane (HDTMS). The Ni-Cu/HDTMS-MX coatings exhibit excellent superhydrophobic performance, with a water contact angle (CA) of 155.1 ± 2.2° and a roll-off angle (RA) of 6 ± 0.5°, accompanied by effective water jet rebound, self-cleaning capability, and enhanced corrosion resistance. Electrochemical measurements demonstrate an order-of-magnitude reduction in corrosion rate (0.5 × 10 −3 mm·y −1 ) and corrosion current density (0.4 × 10 −7 A·cm −2 ), while the impedance modulus |Z| at 0.01 Hz for the Ni-Cu/HDTMS-MX coating reaches approximately 375% of that of the Ni Cu coating. The improved corrosion resistance is attributed to the labyrinth-like diffusion barrier introduced by MXene and the HDTMS-derived hydrophobic film, which significantly lowers the surface energy of the coating. Upon contact with aqueous media, the coating maintains a Cassie-Baxter wetting state, indicating stable superhydrophobic behavior. The entrapped air pockets within the hierarchical micro/nanostructure effectively block the penetration of corrosive species, thereby improving corrosion resistance in chloride-containing environments. This work provides a feasible strategy for designing durable superhydrophobic coatings for the long-term protection of carbon steel in harsh marine environments.
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高影响因子
JOURNAL OF CATALYSIS
·
2026
·
IF 6
Yuting Luo,Qingyi Lv,Huai Liu,Rui Zhang,Wenlong Jia,Lincai Peng
The structural reconstruction of Cu-based catalysts during the hydrodeoxygenation (HDO) process typically leads to the loss of active Cu + species and catalyst sintering, resulting in catalyst deactivation. Herein, we found that Pr-doped CuO x catalyst undergoes in-situ reconstruction to generate stable Cu + species during the HDO of vanillin (VAN) to 2-methoxy-4-methylphenol (MMP). This affords a high MMP yield of 85.5% using methanol as both the solvent and hydrogen donor, which is significant higher than that of pristine CuO x and previously reported catalysts for the HDO of VAN in MeOH. Electronic interactions between Pr dopants and the CuO x matrix strengthen the Cu–O bonds and stabilize Cu + species, thereby increasing the density of acidic sites and oxygen vacancies in the catalyst. This not only promotes MeOH decomposition for H 2 generation, but also facilitates VAN adsorption and activation, thereby boosting HDO activity. This work offers new insights for the in-situ construction of highly active and durable Cu + sites in Cu-based catalysts.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Duoyuan Meng,Yong Wang,Wolong Li,Zhenran Liu,Lili Sun,Yongcun Li
Rechargeable aqueous zinc-air batteries (ZABs) are promising candidates for next-generation energy storage due to their high safety, substantial energy density, and low cost. However, their practical adoption is impeded by inherent issues of conventional zinc anodes, such as dendrite formation, volume expansion, and low zinc utilization during repeated electroplating and stripping. To address these challenges, this study fabricates stable Sn Cu current collectors as anode substrates from Sn-plated copper bases with varying architectures. Electrochemical characterization confirms that the Zn@Sn-Cu electrode inherits the high ionic conductivity of the copper substrate while effectively suppressing hydrogen evolution and reducing the local corrosion current density. Post-cycling scanning electron microscopy (SEM) further reveals that the introduced Sn layer mitigates zinc dendrite growth during deposition/stripping cycles, facilitating the formation of a highly dense and uniform zinc layer on the Sn Cu substrate. Consequently, ZABs assembled with Zn@Sn-2DCu and Zn@Sn-3DCu anodes deliver high specific energy densities of 783 and 800 mAh·g −1 , respectively. Notably, the Zn@Sn-3DCu battery achieves an extended cycle life of over 1800 cycles at a current density of 1 mA·cm −2 .
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高影响因子
Small
·
2026
·
IF 11.8
Siqi Liu,Bowen Zhong,Baolong Wang,Yinuo Li,Li Liu,Wei Zheng,Jun Li,Yudong Huang
Advancing photothermal materials requires synergy between light collection and efficient heat transport. However, nanoscale photothermal fillers, while strengthening absorption, are constrained by limited dispersibility and high interfacial resistance. By contrast, micrometer-scale metal fillers aid conduction yet lie outside the plasmonic regime, and their smooth surfaces promote specular reflection, which limits light capture. Consequently, leveraging their latent complementarity is crucial. Here, a multiscale structure and interface strategy is introduced, in which electrodeposition and alloying build a structured Cu–Zn interface with bead-chain-like nanostructures along the flake edges, thereby forming a metallic backbone that lowers interfacial thermal resistance and simultaneously promotes light capture and heat transfer. Specifically, at 8 vol% loading the composite attains through plane and in plane thermal conductivities of 1.06 and 2.73 W m −1 K −1 . Moreover, it shows broadband absorption (200–800 nm) and exhibits rapid heating and steady state output under both broadband solar and UV irradiation, under 365 nm illumination the film warms to 91.3°C within 30 s, indicating a favorable steady state photothermal heating efficiency under the defined conditions. This strategy offers a scalable route for interface engineering of microscale metal fillers and thus couples’ light absorption, heat transport, and energy use in solar-responsive and renewable energy conversion systems.
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DOI
PubMed
高影响因子
RARE METALS
·
2026
·
IF 11
Fan Xue,Liang Chen,Xindong Zhu,Jianrong Zeng,He Zhu,Si Lan
en This link goes to a English section zh This link goes to a Chinese section Precise control of chemical ordering in bimetallic nanocatalysts offers a route to decouple activity and selectivity in acetylene hydrogenation, but direct atomic-scale evidence linking surface order to catalytic performance is scarce. Here, we tune Pd-Cu nanoalloys from chemically disordered to highly ordered states by composition control and targeted H 2 thermal treatment. Under near-industrial conditions, all catalysts reach full acetylene conversion between 100°C and 120°C, whereas the ethylene selectivity enhances with the chemical ordering increasing. By combining synchrotron X-ray absorption fine structure (XAFS) with X-ray total scattering and reverse Monte Carlo (RMC) simulation, three-dimensional atomic models are reconstructed to quantitatively map surface coordination. Compared with the chemically disordered Pd-Cu nanocatalyst, the highly ordered PdCu shows an increase in average surface Pd-Cu coordination and an expansion of mean surface Pd-Pd separations. These structural features weaken ethylene binding and suppress re-adsorption, rationalizing the enhanced selectivity. Our study provides direct atomic-scale evidence connecting chemical order to catalytic selectivity and opens the way for guiding the precise design of bimetal nanocatalysts. 摘要 en This link goes to a English section zh This link goes to a Chinese section 精准调控双金属纳米催化剂的化学有序,可为乙炔加氢反应中活性与选择性的解耦提供有效路径。然而将表面有序度与催化性能直接关联的原子尺度证据仍较为缺乏。本研究通过成分调控与氢气热处理,成功实现了Pd-Cu纳米合金从化学无序态到高度有序态的转变。在近工业条件下,所有催化剂均在100–120°C区间内实现乙炔完全转化,而乙烯选择性随化学有序度的提升显著增强。结合同步辐射X射线吸收精细结构谱、X射线全散射及反向蒙特卡洛(RMC)模拟,我们重构了纳米合金的三维原子结构模型,实现了表面配位环境的定量解析。与化学无序的Pd-Cu纳米催化剂相比,高度有序的PdCu合金表现出更高的表面Pd–Cu配位数和更长的平均Pd–Pd键距。这些结构特征有助于弱化乙烯吸附并提高其选择性。本研究为化学有序与乙烯选择性之间的关联提供了直接的原子尺度证据,为双金属纳米催化剂的精准设计开辟了新途径。
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高影响因子
ChemCatChem
·
2026
·Vol. 18
·期 2
·e01534
·
IF 3.9
Wenbin Huang,Haoran Liu,Han Yang,Zhen Xu,Tianyu Bai,Fan Shao,Yasong Zhou,Qiang Wei
To improve the efficiency of existing Cu-layered double oxide (LDO) catalysts for hydrogenation of CO 2 to methanol, graphene oxide (GO)-doped Cu-LDO/xGO catalysts were successfully prepared by coprecipitation method, and the influence of GO doping on the structure and reaction performance of Cu-LDO catalysts was deeply investigated. Characterizations including XRD, SEM, ICP-OES, N 2 physical adsorption-desorption, TEM, N 2 O chemisorption, H 2 -TPR, and H 2 /CO 2 -TPD reveal that optimal GO loading (2 wt%) promoted the formation of highly dispersed Cu particles and abundant Cu─MgO interfaces, enhancing H 2 adsorption/dissociation and CO 2 activation. The Cu-LDO/2.0GO catalyst achieved a CO 2 conversion of 22.4%, CH 3 OH selectivity of 94.5%, and methanol space-time yield (STY) of 652.1 g·kgcat −1 ·h −1 at 240°C and 2.5 MPa-outperforming the GO-free Cu-LDO/0GO catalyst, and long-term stability tests show that the incorporation of GO mitigated Cu sintering, maintaining catalytic activity over 200 h. The results of structure-activity relationship analysis show that the main reason 2 wt% GO doping significantly improved the activity and stability of the catalyst lies in the synergistic effect: GO improved Cu sites dispersion boosting H 2 activation and Cu─MgO interface formation. Meanwhile, GO can also act as a conductive bridge for H spillover, enabling hydrogenation of formate and other intermediates adsorbed on Cu–MgO interfaces that are not in direct contact with conventional Cu surfaces, potentially involving isolated Cu species. The study establishes that rational GO incorporation optimizes active site utilization, providing a strategy for designing efficient catalysts for CO 2 conversion. Graphical The incorporation of GO enhances the dispersion of the active metal Cu and increases the density of surface base sites in the catalyst, thereby accelerating the rate of methanol production via CO 2 hydrogenation.
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高影响因子
Journal of Nanomaterials
·
2019
·Vol. 2019
·期 1
·1094308
·
IF 2.233
Ning Sui,Hongxu Gao,Yukai Wang,Jiali Li,Shiyu Qu,Qiang Bai,Hailian Xiao,Jing Sui,Manhong Liu,William W. Yu
A facile method to prepare Pt-Cu nanowires (NWs) was introduced. Structural characterization such as high-resolution transmission electron microscope (HR-TEM), selected-area electron diffraction (SAED), EDS element mapping, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and inductively coupled plasma mass spectrometry (ICP-MS) showed the formation of Pt-Cu alloy, with a width of 4.5 nm on average. The formation process of Pt-Cu NWs was studied; it was found that bromine ion, who has preferential adsorption on Pt (100) face, served as a growth-directing agent; Brij58 not only served as a protector but also played an important role in forming Pt-Cu NWs; the mechanism was proposed. Their electrocatalytic activity towards methanol oxidation was investigated; we found that the current density of Pt-Cu NWs was 295 mA·mg -1 when the ratio of Pt/Cu is 1 : 1, which is 11.5 and 2.35 times higher than that of pure Pt (26 mA·mg -1 ) and commercial Pt/C (126 mA·mg -1 ). The high electrocatalytic activity is attributed to the presence of abundant structural defects and surface active sites on the synthesized Pt-Cu NWs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Sujuan Wang,Qing Luo,Xiaohua Luo,Shengcan Ma,Changcai Chen,Fei Gao,Bodong Lv,Rui Zhong,Weijun Ren,Zhenchen Zhong
The effects of Si and Cu doping on crystal structures, magnetism , and the magnetocaloric effect of EuAl 4 have been investigated. EuAl 4 , EuAl 3.35 Si 0.65 , and EuAl 3.82 Cu 0.18 single crystals grown by the Al flux method are isotypic and crystallize in BaAl 4 -type structure with space group I 4 /mmm . Compared to the pristine compound EuAl 4 , the lattice parameter a keeps almost unchanged and c decreases obviously by Si doping, while a decreases and c increases upon Cu-substitution. These irregular changes in the lattice parameters may contribute to the electronegativity difference between Si and Cu. Cu and Si doping enhances the ferromagnetic interaction, and the direction of easy magnetization changes from the ab plane to the c axis upon the Cu-substitution. Multiple-step metamagnetic transitions are still observed in EuAl 3.35 Si 0.65 as applying the magnetic field along the c axis, while EuAl 3.82 Cu 0.18 shows ferromagnetic behavior along the ab plane and c axis. As a consequence, the low-field magnetocaloric effect is significantly enhanced. The maximum magnetic entropy change under a field change of 20 kOe increases from − 8.4 J/kg K for EuAl 4 to − 12.9 J/kg K for EuAl 3.35 Si 0.65 and − 15.9 J/kg K for EuAl 3.82 Cu 0.18 . The corresponding values of refrigerating capacity are 67, 140, and 147 J/kg, respectively. The remarkable magnetocaloric performances suggest that the Cu-doped EuAl 4 compound is an excellent candidate material for low-temperature magnetic refrigeration.
研究领域:
凝聚态物理
·
材料科学
·
磁学
·
低温物理
·
功能材料
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高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
M.Y. Gao,C. Yang,Q.B. Zhang,Y.W. Yu,Y.X. Hua,Y. Li,P. Dong
Porous Ni-Cu alloy films composed of nanosheets are directly fabricated on Cu substrate using a facile potentiostatic electrodeposition approach from a 1:2 choline chloride-ethylene glycol eutectic solvent (ethaline) containing nickel chloride and copper chloride. Electrochemical co-deposition of Ni-Cu alloy in ethaline is found to be thermodynamically favorable in comparison to conventional aqueous solutions. The deposition process occurs via an instantaneous nucleation and growth of nanoparticles at the initial stage and develops vertically to form nanoporous structures arrayed with nanosheets over deposition time . The as-prepared porous Ni-Cu alloy nanosheet arrays exhibit enhanced electrocatalytic activity for the hydrogen evolution reaction (HER) in alkaline media , which displays a small Tafel slope of 57.2 mV dec −1 with a low onset potential of −48 mV vs. RHE at an optimal condition. It requires small overpotentials of −128 and −150 mV to drive catalytic current densities of 10 and 20 mA cm −2 , respectively. This facile electrodeposition method performed in ethaline provides an efficient way to fabricate porous Ni-based alloy nanosheets directly on a current collector, which is a promising technology for the synthesis of earth-abundant HER electrocatalysts .
研究领域:
电催化
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材料科学
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能源化学
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纳米材料
·
电化学
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高影响因子
RSC Advances
·
2017
·Vol. 7
·期 72
·45420-45431
·
IF 3.108
Jiuli Guo,Huanhuan Yu,Feng Dong,Baolin Zhu,Weiping Huang,Shoumin Zhang
A highly efficient and stable Au–Cu/hydroxyapatite (HAP, Ca10(PO4)6(OH)2) catalyst was reported. HAP was prepared through a deposition–precipitation method. Au–Cu/HAP catalysts were obtained by a two-step impregnation approach. The samples were characterized by XRD, TEM, SEM, UV-Vis, ICP, XPS, H2-TPR, and O2-TPD. CO oxidation reaction was carried out to evaluate the catalytic performance of samples. TEM and UV-Vis results showed that the metallic particles supported on Au–Cu/HAP were smaller than those on Au/HAP, and they were highly dispersed on the HAP support. Patterns of XPS revealed that CuO nanoparticles were formed in the Cu/HAP catalyst, while CuO and Cu2O species coexisted in Au–Cu/HAP catalyst. Based on the O2-TPD data, the addition of copper to Au/HAP gave rise to more new O2 adsorption sites and bigger O2 adsorption capacity. The catalysis results indicated that the Au–Cu/HAP was capable of obtaining higher efficiency and stability compared with Au/HAP and Cu/HAP for CO oxidation. It was likely that the synergistic interaction between gold and CuOx phase created the most active sites on Au–Cu/HAP and was responsible for the enhanced activity and stability in comparison with Au/HAP and Cu/HAP.
研究领域:
催化化学
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材料科学
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环境化学
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纳米催化
·
表面科学
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 33
·17056-17064
·
IF 11.301
Xin-Yu Hu,Pan Xu,Shengwen Deng,Jie Lei,Xiaodong Lin,Qi-Hui Wu,Mingsen Zheng,Quanfeng Dong
Lithium (Li) is a metallic element possessing the most negative electrode potential and the lowest electrochemical equivalent, which make it one of the key materials for the development of the next-generation Li batteries with high specific energy. However, the heterogeneous deposition, volume expansion, solid-electrolyte interphase (SEI) fracture, and high reactivity of metallic Li make its commercialized development difficult. Herein, a novel polyaniline (PANI) decorated three-dimensional (3D) copper mesh (3DCMP) skeleton for a Li metal anode is proposed, which was prepared by in situ polymerizing aniline on the surface of a copper mesh (3DCM). The lithiophilic PANI micro-sheets could induce ordered Li deposition on the mesh and facilitate the formation of a more available SEI film, which could effectively alleviate the formation of Li dendrites and highly promote the utilization of Li during long-term cycling. The symmetrical-cell displayed an excellent Li plating/stripping performance, in which it maintained an overpotential of less than 20 mV at a current density of 2 mA cm−2 over 4000 h. Furthermore, the full-cell coupled with the LiFePO4 cathode exhibited a high capacity retention of 84.8% at 4C after 550 cycles and when coupled with the rGO/S cathode exhibited a capacity retention of 94.4% at 1C after 100 cycles. Hence, it demonstrates a promising potential to be applied in large-scale manufacturing.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米材料
·
电池化学
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 48
·18003-18013
·
IF 4.5
Yang Yue,Ma Tianhui,Zhang Zheng
Cubic-phase Li 7 La 3 Zr 2 O 12 (LLZO) garnet is considered as a promising solid electrolyte due to high Li-ion conductivity and good chemical stability against electrode material. However, the desired cubic-phase formation of LLZO relies on the doping elements. To further improve the electrochemical performance and control the retention of lithium, a composite solid electrolyte based on Cu and Ta co-doped LLZO was fabricated by flash sintering (FS) in the present work due to the FS process characterized short sintering times and low furnace temperature, which could effectively restrain “Li-loss”. Based on the optimized Ta-LLZO conducted in our previous study, the effects of Cu 2+ content on the ionic conductivity and sintering behavior of the doped composites were discussed. The results show that Cu 2+ doping effectively stabilized the cubic structure of the co-doped composites and simultaneously promotes sinter-ability in FS process. Moreover, it is demonstrated that the room-temperature total conductivity of the Cu and Ta co-doped LLZO solid electrolyte is improved significantly by decreasing the grain boundary resistances and improving the densifications with the increasing of Cu 2+ content. In addition, the maximum ionic conductivity of 2.83 × 10 –3 S cm −1 and relative density 96.6% of the composite with Cu 2+ doping content 0.35 mol could be reached.
研究领域:
材料科学
·
固态离子学
·
陶瓷材料
·
能源材料
·
电化学
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高影响因子
危险品化学品经营许可证（带存储）