MATERIALS CHARACTERIZATION
·
2026
·
IF 6.2
Bi Wang,Jian Huang,Lili Wang,Chengxu Lin,Caihang Liang,Qi Feng,Hongbo Qin
Herein, Cu@Sn core–shell particles were prepared and used to formulate a novel transient liquid phase sintering composite paste. Composite joints fabricated from this paste achieved low-temperature bonding while offering excellent mechanical strength and high-temperature service capability. Cu@Sn particles with a uniform Sn shell were produced via electroless tin plating, and the effect of the Cu@Sn: Sn mass proportions on the shear strength of the joints was systematically evaluated. The joints prepared by sintering the paste with a Cu@Sn: Sn mass proportion of 6:4 at 260 °C under 10 MPa pressure for 15 min achieved a shear strength of 106.84 MPa at 25 °C and retained 94.26 MPa at 300 °C. Microstructural characterization revealed that appropriate addition of Sn particles effectively regulated the formation and distribution of intermetallic compounds (IMCs) and markedly reduced the porosity of the sintered layer. The formation of fine-grained Cu 3 Sn substantially enhanced the joint strength; meanwhile, the development of subgrains and low-angle grain boundaries on the Cu substrate side of the substrate/sintered layer interface improved the interfacial bonding. The accumulation of dislocations at the soft Cu particles against the hard IMC phases generated back stress and increased strain hardening, promoting hetero-deformation induced strengthening in the heterostructured materials. Twin boundaries observed in some Cu cores also acted as barriers to dislocation motion, promoting dislocation storage while preserving the plasticity of the Cu phase, thereby further increasing the strength of the Cu@Sn composite joints.
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高影响因子
ACS Applied Nano Materials
·
2026
·Vol. 9
·期 29
·13860-13868
·
IF 5.8
Li Bingshuang,Li Xin,Huang Xiaoxi
The
electrochemical CO 2 reduction reaction (CO 2 RR)
to produce multicarbon products represents a promising route
for sustainable carbon utilization. Copper-based catalysts are unique
in catalyzing C–C coupling, but the active Cu + species,
which favor ethylene formation, are prone to reduction during reaction.
In this work, we demonstrate that halogen doping, combined with a
nanoconfinement strategy, effectively stabilizes Cu + within
a nanoporous carbon matrix. Two model catalysts supported on porous
carbon spheres (Cu@C-1 derived from CuCl 2 and Cu@C-2 from
CuSO 4 ) were synthesized. After calcination, Cu@C-1 predominantly
comprises CuCl while Cu@C-2 mainly consists of Cu 2 O with
trace sulfur doping. They both have a similar average copper oxidation
state. During the CO 2 RR at −1.3 V versus the RHE,
the Cu@C-1 nanocatalyst achieves selective ethylene production with
a Faradaic efficiency (FE) of 41.5% and a partial current density
of 110.7 mA cm –2 whereas the Cu@C-2 nanocatalyst
primarily generates methane (FE of 49.5% and partial current density
of 124.4 mA cm –2 ). In situ and postreaction characterizations
reveal that nanoscale confinement in Cu@C-1 maintains its CuCl phase
under the reaction conditions, which promotes the *COCHO intermediate
and facilitates C–C coupling toward ethylene. Conversely, Cu@C-2
nanoparticles are reduced to metallic Cu 0 , favoring the
methane pathway. This work highlights that tailoring the precursor
anion offers a precise level of control over the initial copper phase
and its dynamic state under electrolysis, thereby steering the CO 2 RR selectivity toward the desired products.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124092
·
IF 7.5
Zhihui Li,Xiangyu Wang,Hua Jiang,Kexin Zhu,Zihan Li,Fuping Zeng
To address the environmental challenge of sulfur hexafluoride (SF 6 ), a CuO@ZnO catalyst was prepared from a Cu/Zn-BTC bimetallic precursor. This enabled a synergistic treatment system with sulfur element-catalyzed conversion and fluorine element-fixation. The experimental results show that under mild conditions of 500 °C and 0.2 MPa, during a 20 h catalytic process, the catalyst achieves a maximum degradation efficiency of 96.34% for 2% SF 6 , with high selectivity converting it to SO 2 , while fluorine was fixed as CaF 2 . In-situ XRD characterization and density functional theory (DFT) calculations revealed a key in situ activation process. Under NH 3 induction, CuO is reduced to metallic Cu, forming an optimal Cu@ZnO interface that enhances SF 6 adsorption and bonding. This significantly lowers the energy barriers for S-F bond cleavage and SO 2 formation. The rate-determining step, the energy barrier for SO 2 formation, dropped from 2.74 eV to 0.48 eV compared with CuO@ZnO, thus providing a kinetic explanation for the catalytic mechanism. Overall, this work offers a high-performance catalyst for SF 6 treatment and a new theoretical basis for designing MOF-derived materials for fluorinated greenhouse gas conversion.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Xiao-Ying Li,Ruo-Lan Xu,Ren Zhu,Ting-Yu Zhang,Wen-Rui Wang,Wu-Jun Liu,Hong Jiang
Interfacial electronic coupling drives Cu-site-selective electron enrichment. • Electron-rich Cu centers facilitate rapid Cu 2+ /Cu + redox interconversion. • Regulated ROS evolution enables robust 1 O 2 -enriched Fenton catalysis. Efficient degradation of organic pollutants via Fenton-like catalysis remains a challenge due to the instability of the redox cycle under prolonged operation. Herein, we construct an interface-engineered FeCu layered double hydroxide/g-C 3 N 4 heterostructure (FeCu-LDH/g-C 3 N 4 ) to establish an internal electron-supply pathway for stabilizing Cu-centered redox cycling. Spectroscopic analyses, together with DFT calculations, support interface-induced electron redistribution, which favors electron depletion in the g-C 3 N 4 framework and preferential electron enrichment at Cu sites, promoting partial Cu 2+ reduction to Cu + , while Fe 3+ remains largely stable as a structural and electronic modulator. Benefiting from this site-selective electronic regulation, FeCu-LDH/g-C 3 N 4 exhibits markedly accelerated H 2 O 2 activation and achieves near-complete Rhodamine B degradation within 20 min, with a pseudo-first-order rate constant 4.6 times that of pristine FeCu-LDH. Active-site substitution confirms Cu as the primary redox center, while ROS quenching and electron paramagnetic resonance analyses identify 1 O 2 as the dominant oxidative species, accompanied by •OH and O 2 •- . The catalyst further shows robust recyclability, broad pH adaptability, and strong tolerance to humic substances and common ions. This work demonstrates a Cu-site-selective interfacial electron-regulation strategy for designing stable and efficient Fenton-like catalysts. Download: Download high-res image (414KB) Download: Download full-size image
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Materials Today Nano
·
2026
·
IF 7.6
Shixiang Rao,Hao Jiang,Zheng Li,Guoqing Wang,Shixing Han,Chunguang Li
Marine biofouling poses serious safety risks to offshore infrastructures and leads to substantial economic losses. Although hydrogels have shown significant promise in marine antifouling applications, developing antifouling hydrogels that simultaneously possess excellent mechanical strength and strong antifouling efficiency remains a major challenge. Herein, a high-performance antifouling hydrogel was constructed by incorporating hollow glass microspheres functionalized with a Cu(I) based metal-organic framework (Cu(I)-MOFs) into a poly(vinyl alcohol)/poly(sulfobetaine methacrylate) (PVA/PSBMA) double-network matrix. The as-developed Cu(I)-MOFs/hydrogel composite integrates excellent antifouling and mechanical properties, achieving protein and algal resistance of 99.8% and 99.9%, respectively, as well as a high antibacterial rate of 99.6%. Importantly, the composite reaches a compressive strength of 5.35 MPa, outperforming many existing antifouling hydrogels, and demonstrates low swelling with reliable performance in seawater. In a 100-day field test in a real marine environment, the fouling coverage of as-prepared hydrogel was as low as 0.12%. This work offers an effective and feasible strategy for preventing marine biofouling and also pioneers a new approach for hydrogel applications. Download: Download high-res image (395KB) Download: Download full-size image
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Zhen Li,Jinglin Mu,Xiaozhong Wu,Jiwen Li,Hao Yin,Tong Zhou,Xiangyan Shen,Pengfei Zhou,Jin Zhou
Making CF x -based batteries rechargeable represents a superior promise route to dramatically boost of secondary battery systems due to the unprecedented theoretical capacity and specific energy density of CF x . However, this goal has been plagued by a fundamental challenge of the high dissociation energy and the non-uniform deposition of the discharge products, alkaline metal fluoride (e.g., NaF). Herein, a novel strategy of engineering the discharge product NaF is developed. The hybrid Cu@CF 0.88 cathode material delivers a reversible discharge capacity of 700.6 mAh g −1 at 20 mAh g −1 and an energy density of 1541.1 Wh kg −1 , corresponding to 81.4% of the theoretical value. At 200 mAh g −1 , it gives a reversible discharge capacity of 250.1 mAh g −1 after 10 cycles. The Cu nanoparticles serve as preferential nucleation sites, effectively regulating the nucleation, crystallization, and spatial distribution of NaF in the initial discharge process. More importantly, an in situ generated intermediate NaCuF 3 induces the reconstruction of NaF into a more readily decomposable and electrochemically active amorphous phase. This strategy remarkably improves the reaction reversibility of the Na/CFₓ batteries, while additional efforts are required to optimize the long-term cycling stability for practical applications.
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Lulu Zuo,Di Li,Xinwei Li,Zhiyong Tang
The electrochemical nitrate reduction reaction (NO 3 RR) represents an attractive and sustainable strategy for simultaneously addressing nitrate contamination and producing value-added ammonia under ambient conditions. Compared with the energy- and carbon-intensive Haber-Bosch process, NO 3 RR offers a decentralized pathway for green ammonia synthesis powered by renewable electricity. However, achieving high ammonia selectivity remains challenging because nitrate-to-ammonia conversion involves a multistep proton-coupled electron transfer cascade, in which the initial two-electron reduction of nitrate to nitrite and the subsequent hydrogenation of nitrite-derived intermediates must proceed in a kinetically coordinated manner. In practice, this cascade is often hindered by reactivity mismatch between the upstream and downstream steps, resulting in nitrite accumulation, incomplete hydrogenation of NO x intermediates, and intensified competition from the hydrogen evolution reaction. Despite the conceptual promise of tandem catalysis, a practical framework for quantifying and optimizing such kinetic matching remains insufficiently developed. Here, we report a layered double hydroxide-derived Cu-Zn dual-site electrocatalyst in which the Cu/Zn ratio is used as a compositional lever to regulate cascade coordination during NO 3 RR in neutral electrolyte. Among the investigated compositions, Cu 1.5 Zn 1.5 Al-R exhibits the optimal balance between nitrate activation and subsequent hydrogenation, delivering a peak Faradaic efficiency of 95% for ammonia at −0.7 V vs. RHE, together with a high ammonia yield of 1526.0 mmol·g −1 ·h −1 . Time-dependent product analysis further shows that this optimal catalyst displays suppressed nitrite accumulation together with rapid ammonia formation, indicating an effective kinetic coupling between the consecutive reduction steps. Mechanistic studies based on online differential electrochemical mass spectrometry and in situ infrared spectroscopy reveal that the reaction mainly proceeds through a *NOH-mediated pathway. The results suggest that Cu-rich motifs are responsible for promoting nitrate adsorption and the initial two-electron reduction step, while Zn-associated motifs regulate the local hydrogenation microenvironment and facilitate the further hydrogenation of nitrite-derived intermediates near adjacent Cu sites. As a result, the Cu/Zn ratio serves as a key compositional parameter to balance the tandem reaction kinetics and improve ammonia selectivity. This work demonstrates that ratio-programmed Cu-Zn tandem catalysis is an effective strategy to enhance nitrate-to-ammonia conversion by kinetically matching the sequential elementary steps. The present study not only provides a viable catalyst design principle for selective NO 3 RR, but also offers useful insight into the regulation of multistep electrocatalytic reactions through compositional engineering.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Jibiao Wang,Jiansen Wang,Lingyun Yang,Houyu Zhu,Pornthip Tongying,Yuanxing Wang
Oxide-derived Cu nanowire arrays were developed for electrochemical CO 2 reduction. • Cu nanowire arrays are capable of producing syngas with a wide range of H 2 /CO ratios. • The tunable selectivity of catalysts was attributed to the grain boundaries in Cu. Electrochemical reduction of CO 2 to value-added fuels and chemical feedstocks, such as syngas, stands as an appealing solution for energy and environmental sustainability. Currently, it suffers from a lack of catalysts with good activity and selectivity. Herein, we have synthesized a series of oxide-derived Cu nanowire arrays (NAs) as catalysts for electrochemical CO 2 reduction. Copper oxides NAs were first synthesized by thermal oxidation and then electrochemically reduced. By adjusting the annealing temperatures, the obtained Cu NAs are capable of reducing CO 2 and H 2 O to produce syngas with a wide range of H 2 /CO ratios (from 2.5:1 to 0.7:1) at a low overpotential. First-principles calculations confirmed that the enhancement of CO 2 reduction and suppression of hydrogen evolution were attributed to grain boundaries in the Cu NAs. This research demonstrates a promising strategy for the development of Cu-based catalysts in tunable syngas production. Download: Download high-res image (187KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Manqing Li,Chunyang Lu,Jie Ren,Abdallah A. Elsherbiny,Taida Wei,Dejin Qiu,Yaowei Yu
With the widespread utilization of biomass resources, the released sulfurous gases during its pyrolysis will cause environmental pollution. The Cu-Y adsorbent offers an effective solution to this issue due to its superior sulfur adsorption capacity. In this study, the effects on the performance of biochar and the sulfur adsorption capacity of the adsorbent were investigated by adjusting the Cu loading and the co-pyrolysis temperature. The results indicated that increasing both these parameters will facilitate the decomposition of organic sulfur in biochar, leading to the formation of sulfurous gases. The 15 wt% Cu-Y adsorbent exhibited the best synergistic catalytic-adsorption performance at 300 °C, achieving a maximum sulfur adsorption capacity of 9.88 mg S/g. And the biochar desulfurization efficiency reached 83.7 %. Characterization analysis revealed that excessive Cu loading (>15 wt%) reduced the specific surface area and mesopore volume of the Cu-Y adsorbent. Furthermore, Cu species tend to aggregate into metal clusters ranging from 130 to 300 nm, which can mask active sites and consequently reduce the adsorption capacity. Additionally, high temperature (350 °C) caused the structural collapse of the Cu-Y adsorbent, leading to a significant decline in sulfur adsorption capacity. This study further clarified the adsorption mechanism of various sulfurous gases, including dimethyl disulfide (C 2 H 6 S 2 ), dimethyl sulfide (C 2 H 6 S), carbonyl sulfide (COS), carbon disulfide (CS 2 ), thiophene (C 4 H 4 S), methanethiol (CH 3 SH), and hydrogen sulfide (H 2 S). These results confirmed the dual functionality of Cu-Y adsorbent in enhancing biochar quality and adsorbing sulfur emissions, providing a sustainable strategy for cleaner biomass conversion.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Weijia Pu,Zhihui Li,Binxiong Guang,Yahui Xiao,Yong Liu
In this study, an ordered mesoporous carbon (OMC) was synthesized by coordination induced self-assembly, in which the tannin was used as carbon precursor, Cu 2 + and Ce 3+ cations were as both crosslinking agents and catalyst precursors. The results indicated that the Cu 0 , Cu + and oxygen vacancies were in-situ formed by self-reduction of the nascent CO gas during carbonization, and well-dispersed within the OMC substrate. Moreover, the resulting Cu + species and oxygen vacancies were firmly stabilized in the Cu-CeO x interfaces induced by the strong electronic interaction between Cu 0 and CeO 2 . Simultaneously, the OMC substrate created abundant ordered mesoporous structure to disperse and confine the Cu-CeO x species. The balanced Cu 0 and Cu + species in the Cu-CeO x @OMC catalysts synergistically boosted the hydrogenation of cyclohexyl acetate. Benefited from those, the Cu-CeO x @OMC-550–3 catalyst exhibited the excellent activity and stability for hydrogenation of cyclohexyl acetate into cyclohexanol even without reduction by hydrogen. Specifically, under the optimal reaction conditions of 250 °C, 4 h, 4 MPa H 2 and 50 mg catalyst dosage, the cyclohexyl acetate conversion and selectivities of cyclohexanol and ethanol achieved 95.9 %, 96.6 % and 98.4 %, respectively. Moreover, the catalyst showed no significant changes in structure and activity after five reusing times, delivering robust stability and reusability.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yunying Wang,Yanyan Yu,Ying He,Yun Liu
Single-atom iron catalysts have emerged as promising mimics of oxidases; however, strategies to enhance their intrinsic catalytic activity remain underexplored. Herein, waste pitch and eggshells are utilized for fabricating high-performance nanozymes by coloading nanocopper and iron single atoms onto nitrogen-doped carbon nanotubes (Fe/Cu@NCNTs). It has been demonstrated that copper nanoparticles serve as a critical modulator, electronically tuning the iron sites, which increases the Fe2+/Fe3+ ratio and promotes the formation of Fe–Cu nanoalloys. These synergistic effects significantly enhance the oxidase-like activity of the catalyst. The optimized Fe/Cu@NCNTs exhibit a 48.7% higher specific activity and superior substrate affinity compared with the Fe@NCNTs counterpart. Leveraging this enhanced catalytic performance, a smartphone-assisted colorimetric sensing platform was developed for the rapid visual detection of multiple analytes. Furthermore, by incorporating a three-channel sensor array (TMB, ABTS, and OPD) with pattern recognition analysis, the platform accurately discriminates between nine antioxidants at concentrations as low as 10 μM. This work not only provides valuable insight into the mechanistic role of copper in enhancing the oxidase-like activity of iron single-atom catalysts but also offers a versatile and high-throughput sensing platform that advances the application of nanozymes in complex sample analysis.
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Materials Today Chemistry
·
2026
·
IF 7.4
Haiqun Jin,Hongjie Tong,Chenxuan Mei,Haiping Lin,Kun Chen,Pu Wu
Cu/Zn-MOF nanozyme exhibits robust triple-enzyme activities. • It promotes healing by combining antibacterial, antioxidant, and pro-proliferative effects. • This work provides a strategy for designing multifunctional nanoenzyme platform for efficient wound therapy. The treatment of infected wounds is severely challenged by bacterial resistance and dysregulated healing processes. Herein, we report a bimetallic Cu/Zn-MOF nanozyme fabricated via a facile self-assembly strategy. The material exhibits robust triple-enzyme mimetic activity (superoxide dismutase (SOD), glutathione peroxidase (GPx), and ascorbate peroxidase (APx)) enabling efficient reactive oxygen species (ROS) scavenging to alleviate oxidative stress and inflammation. In vitro, Cu/Zn-MOF demonstrated potent, broad-spectrum antibacterial activity, primarily associated with disruption of bacterial nucleotide metabolism and energy homeostasis, while also promoting fibroblast proliferation and migration. In an infectious wound model, Cu/Zn-MOF treatment significantly accelerated wound closure, enhanced collagen deposition, and facilitated orderly tissue regeneration, achieving a healing rate of 93.4% by day 12. This work presents a versatile nanozyme platform that intelligently orchestrates the sequential stages of wound healing, offering a promising multi-functional strategy for regenerative medicine.
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